fix(proxy): address review findings on admission control (#64 )

- tracing: responseWriter now forwards Flush and exposes Unwrap. Without it w.(http.Flusher) failed for every request passing the tracing middleware, so the parked-stream keep-alive never started: a parked streaming request wrote nothing for up to ADMISSION_MAX_PARK_SECONDS, which is exactly the client timeout the keep-alive was added to prevent. - proxy: once the SSE status line is spent, ModifyResponse frames an upstream response >= 400 as an event: error instead of letting a raw error body land inside the stream, where a streaming client reads it as an empty completion and reports success. net/http keeps the first status, so the upstream status cannot be forwarded after the park has written one. - engine_state: new Snapshot() returns the state and its tick channel under one lock. Get and Tick taken separately can miss the poll that lands between the two calls, parking a request for an extra interval. - engine_state: observer_degraded now tracks current parsability rather than being raised once on the first poll and never cleared, which pinned it at 1 after a single truncated response and never reported drift that appeared later. markDegraded only touches the exporter when the value changes. - deployment: ADMISSION_MAX_INFLIGHT is set explicitly to 4, documenting the coupling to the engine's --max-num-seqs, instead of silently defaulting to VLLM_MAX_NUM_SEQS.
feat(proxy): engine-wide LLM admission control via vLLM gauges (#64 )
2026-09-30 19:32:10 +08:00 · 2026-09-30 17:39:47 +08:00 · 2026-09-29 15:46:39 +00:00 · 2026-09-29 14:40:31 +00:00 · 2026-09-29 08:14:00 +00:00 · 2026-09-29 16:10:43 +08:00
183 changed files with 21525 additions and 5568 deletions
@@ -1,85 +0,0 @@
 # Forgejo Actions CI. Note the path: Forgejo reads .forgejo/workflows/, not
 # .github/workflows/. The remote for this repo is git.riotpiao.com, so a GitHub
 # workflow here would never run.
 #
 # runs-on: docker matches the only label the cluster runner declares
 # (talos-runner, labels: [docker]).
 name: CI
 on:
  push:
    branches: [main]
  pull_request:
    branches: [main]
 env:
  REGISTRY: forgejo.riotpiao.com
  IMAGE: forgejo.riotpiao.com/rock/api-gateway
 jobs:
  verify:
    name: Test, vet, build
    runs-on: docker
    container:
      image: golang:1.25-bookworm
    steps:
      - uses: actions/checkout@v4
      - name: go vet
        run: go vet ./...
      # The race detector needs cgo, so this cannot run with CGO_ENABLED=0.
      - name: go test -race
        run: go test ./... -race
      - name: Static build
        run: CGO_ENABLED=0 go build -trimpath -o gateway ./cmd/gateway
      - name: govulncheck
        run: |
          go install golang.org/x/vuln/cmd/govulncheck@latest
          govulncheck ./...
        continue-on-error: true
  image:
    name: Build and push image
    runs-on: docker
    needs: verify
    # Only publish from main. PRs get the verify job and nothing else, so an
    # untrusted branch can never push a tag the cluster might pull.
    if: github.ref == 'refs/heads/main' && github.event_name == 'push'
    container:
      image: docker:27-cli
      # The runner's dind sidecar shares the pod network and the mTLS cert
      # emptyDir, so the daemon is reachable on localhost with the client certs
      # dind generated at startup.
      options: --network host
    env:
      DOCKER_HOST: tcp://localhost:2376
      DOCKER_TLS_VERIFY: "1"
      DOCKER_CERT_PATH: /docker-certs/client
    steps:
      - uses: actions/checkout@v4
      - name: Registry login
        run: |
          echo "${FORGEJO_PAT}" | docker login "${REGISTRY}" \
            --username rock --password-stdin
        env:
          FORGEJO_PAT: ${{ secrets.FORGEJO_RIOTPIAO_PAT }}
      # SHA tags only. 6.1 requires them, and :latest makes an Argo rollout
      # non-deterministic — the same tag can resolve to different bits.
      - name: Build
        run: |
          docker build \
            --build-arg "VERSION=${GITHUB_SHA}" \
            -t "${IMAGE}:${GITHUB_SHA}" \
            .
      - name: Push
        run: docker push "${IMAGE}:${GITHUB_SHA}"
      - name: Report digest
        run: |
          docker inspect --format='{{index .RepoDigests 0}}' "${IMAGE}:${GITHUB_SHA}"
@@ -0,0 +1,189 @@
 name: CI
 on:
  push:
    branches: [main]
  pull_request:
    branches: [main]
  workflow_dispatch:
 env:
  REGISTRY: forgejo.riotpiao.com
  IMAGE: forgejo.riotpiao.com/rock/api-gateway
  DOCKER_HOST: tcp://localhost:2375
 jobs:
  ci:
    name: CI
    runs-on: golang
    steps:
      - name: Install dependencies
        run: |
          apt-get update
          apt-get install -y docker.io curl nodejs
      - name: Checkout code
        uses: actions/checkout@v4
      - name: Go vet
        run: go vet ./...
      - name: Go test
        run: go test -short ./...
      - name: Get short SHA
        id: sha
        run: echo "short_sha=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
      - name: Registry login
        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
        run: |
          echo "${REGISTRY_TOKEN}" | docker login "${REGISTRY}" \
            --username "${REGISTRY_USER}" --password-stdin
        env:
          REGISTRY_USER: ${{ secrets.FORGEJO_REGISTRY_USER }}
          REGISTRY_TOKEN: ${{ secrets.FORGEJO_REGISTRY_TOKEN }}
      - name: Build Docker image
        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
        run: |
          docker build --no-cache \
            -t "${IMAGE}:${{ steps.sha.outputs.short_sha }}" \
            -f Dockerfile .
      - name: Push image (SHA tag)
        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
        run: docker push "${IMAGE}:${{ steps.sha.outputs.short_sha }}"
      # ── Deploy canary pod + integration test ────────────────
      # Canary pod runs in-cluster with real secrets and real upstreams
      # (Temporal, Gotify). Tests run against its pod IP directly.
      # Zero downtime: production pods untouched until tests pass.
      - name: Setup kubeconfig
        if: false  # SKIP: only needed for canary deploy, RBAC not ready
        run: |
          mkdir -p ~/.kube
          echo "${KUBECONFIG_B64}" | base64 -d > ~/.kube/config
          kubectl get namespaces --no-headers | head -1
          echo '✓ kubeconfig works'
        env:
          KUBECONFIG_B64: ${{ secrets.KUBECONFIG_B64 }}
      - name: Deploy canary pod
        if: false  # SKIP: SA lacks pod create RBAC. Re-enable when fixed.
        id: canary
        run: |
          SHA="${{ steps.sha.outputs.short_sha }}"
          POD_NAME="api-gateway-canary-${SHA}"
          # Remove any stale canary
          kubectl delete pod "${POD_NAME}" -n api --ignore-not-found
          # Create canary pod with real secrets + config
          kubectl run "${POD_NAME}" \
            --image="${IMAGE}:${SHA}" \
            --restart=Never \
            --namespace=api \
            --labels="app=api-gateway-canary,sha=${SHA}" \
            --overrides="$(cat <<JSON
          {
            "spec": {
              "imagePullSecrets": [{"name": "forgejo-registry"}],
              "volumes": [
                {"name": "config", "secret": {"secretName": "api-gateway-config"}}
              ],
              "containers": [{
                "name": "${POD_NAME}",
                "image": "${IMAGE}:${SHA}",
                "imagePullPolicy": "Always",
                "env": [
                  {"name": "LISTEN_ADDR",   "value": "0.0.0.0:8080"},
                  {"name": "CONFIG_PATH",   "value": "/etc/gateway/config.yaml"},
                  {"name": "LOG_LEVEL",     "value": "info"},
                  {"name": "GOTIFY_URL",           "valueFrom": {"secretKeyRef": {"name": "gotify-webhook-secret", "key": "gotify-url",              "optional": true}}},
                  {"name": "GOTIFY_APP_TOKEN",     "valueFrom": {"secretKeyRef": {"name": "gotify-webhook-secret", "key": "gotify-app-token",        "optional": true}}},
                  {"name": "FORGEJO_WEBHOOK_SECRET","valueFrom": {"secretKeyRef": {"name": "gotify-webhook-secret", "key": "forgejo-webhook-secret", "optional": true}}},
                  {"name": "AUTH_CLIENT_SECRET",   "valueFrom": {"secretKeyRef": {"name": "api-gw-client-secret",  "key": "client-secret",          "optional": true}}}
                ],
                "volumeMounts": [
                  {"name": "config", "mountPath": "/etc/gateway", "readOnly": true}
                ],
                "readinessProbe": {
                  "httpGet": {"path": "/healthz", "port": 8080},
                  "initialDelaySeconds": 3,
                  "periodSeconds": 2
                }
              }]
            }
          }
          JSON
          )"
          echo "✓ Canary pod created: ${POD_NAME}"
          # Wait for pod to be ready (real secrets, real upstreams)
          kubectl wait pod/"${POD_NAME}" -n api \
            --for=condition=Ready --timeout=90s
          # Capture pod IP for test runner
          POD_IP=$(kubectl get pod "${POD_NAME}" -n api \
            -o jsonpath='{.status.podIP}')
          echo "pod_name=${POD_NAME}" >> $GITHUB_OUTPUT
          echo "pod_ip=${POD_IP}"     >> $GITHUB_OUTPUT
          echo "✓ Canary ready at ${POD_IP}:8080"
      - name: Run integration tests against canary
        if: false  # SKIP: depends on canary pod
        id: tests
        run: |
          POD_IP="${{ steps.canary.outputs.pod_ip }}"
          GW="http://${POD_IP}:8080"
          RESULTS_DIR="/tmp/test-results"
          mkdir -p "${RESULTS_DIR}"
          echo "Running integration tests against canary at ${GW}..."
          sh k8s/tekton/scripts/integration-test.sh
          RESULT=$(cat "${RESULTS_DIR}/result" 2>/dev/null || echo "fail")
          SUMMARY=$(cat "${RESULTS_DIR}/summary" 2>/dev/null || echo "unknown")
          echo "Result: ${RESULT}"
          echo "Summary: ${SUMMARY}"
          echo "result=${RESULT}" >> $GITHUB_OUTPUT
      - name: Cleanup canary pod
        if: false  # SKIP: depends on canary pod
        run: |
          POD_NAME="${{ steps.canary.outputs.pod_name }}"
          if [ -n "${POD_NAME}" ]; then
            kubectl delete pod "${POD_NAME}" -n api --ignore-not-found || true
            echo "✓ Canary pod removed"
          else
            echo "⚠ No canary pod to clean up (name was empty)"
          fi
      - name: Gate on test result
        if: false  # SKIP: depends on canary pod
        run: |
          echo "✗ Integration tests FAILED — production deployment unchanged"
          exit 1
      # ── Zero-downtime promotion ──────────────────────────────
      # kubectl set image triggers a rolling update: new pods come up
      # before old pods are terminated. Production traffic uninterrupted.
      # TODO: Re-enable rolling update when kubeconfig/RBAC is ready
      # - name: Promote — rolling update
      #   if: github.event_name == 'push' && github.ref == 'refs/heads/main'
      #   run: |
      #     kubectl set image deployment/api-gateway api-gateway="${IMAGE}:${SHA}" -n api
      #     kubectl rollout status deployment/api-gateway -n api --timeout=120s
      - name: Tag :latest (informational)
        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
        run: |
          docker tag "${IMAGE}:${{ steps.sha.outputs.short_sha }}" "${IMAGE}:latest"
          docker push "${IMAGE}:latest"
          echo "✓ Tagged :latest"
      - name: Cleanup docker images
        if: always()
        run: docker image prune -af 2>&1 | tail -3 || true
@@ -0,0 +1,34 @@
 # SOPS Configuration for secrets encryption
 # Public keys are safe to commit; private keys stay in cluster
 creation_rules:
  # Encrypt secrets, configs, and sensitive files
  # Multiple public keys for key rotation support
  # Files matching these patterns will be encrypted automatically with `sops -e`
  - path_regex: k8s/(.*secret.*|.*config.*|.*deployment.*\.ya?ml)
    age:
      - age1e5fq3hwxy78psus2nfvmtmua36g0u3suk78ephw6246l974d2utsvn0hla
      - age1ryxmuwhecmdru786eqgek4cf8ppq585j2uqr7e87phya42w9s5wscn6tgp
    encrypted_regex: '^data|^stringData'  # Only encrypt data fields, keep structure readable
  # Fallback rule for .enc.yaml files
  - path_regex: '.*\.enc\.ya?ml'
    age:
      - age1e5fq3hwxy78psus2nfvmtmua36g0u3suk78ephw6246l974d2utsvn0hla
      - age1ryxmuwhecmdru786eqgek4cf8ppq585j2uqr7e87phya42w9s5wscn6tgp
    encrypted_regex: '^data|^stringData'
 # To encrypt a file locally:
 #   sops --encrypt k8s/configmap.yaml > k8s/configmap.yaml
 #
 # To decrypt and view:
 #   sops k8s/configmap.yaml
 #
 # To decrypt to stdout:
 #   sops --decrypt k8s/configmap.yaml
 #
 # The private age keys are stored in the cluster at:
 #   kubectl -n argocd get secret sops-age -o jsonpath='{.data.key\.txt}' | base64 -d
 #
 # Key rotation: Multiple public keys can coexist for decryption
 # Only private keys MUST be kept secret (in cluster only)
@@ -7,7 +7,7 @@
 # --platform=$BUILDPLATFORM pins the build stage to the machine doing the
 # building, then Go cross-compiles to $TARGETARCH. Without it, building an
 # amd64 image from an arm64 workstation runs the whole toolchain under QEMU.
-FROM --platform=$BUILDPLATFORM golang:1.25-bookworm AS build
+FROM --platform=$BUILDPLATFORM golang:1.26-bookworm AS build
 WORKDIR /src
@@ -46,6 +46,10 @@ FROM gcr.io/distroless/static-debian12:nonroot
 # securityContext; if one changes, both must.
 USER 65532:65532
 # distroless/static has no CA certs. Copy them from the build stage so Go's
 # crypto/tls can verify the Kubernetes API server certificate.
 COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
 COPY --from=build /out/gateway /gateway
 EXPOSE 8080
@@ -1,499 +0,0 @@
 # LLM Tool Calls Testing Guide
 This guide shows how to test the gateway with LLM tool calling (function calling) across different APIs.
 ## What's Tested
 The gateway fully supports tool calling for:
 - **OpenAI API** (`/v1/chat/completions`) - OpenAI, DeepSeek, etc.
 - **Anthropic API** (`/llm/v1/messages`) - Claude models
 - **Custom APIs** - Any LLM that supports tool definitions and responses
 ### Test Coverage
 ```
 ✅ OpenAI-style tool calling
 ✅ Streaming tool calls (SSE with tool_use blocks)
 ✅ Multi-turn conversations with tool results
 ✅ Parallel tool calls (multiple tools at once)
 ✅ Anthropic tool_use format
 ✅ Complex nested tool arguments
 ```
 ---
 ## Quick Start: Run Tests Locally
 ```bash
 cd /Users/rockliang/workplace/homelab-frontend
 # Run all tool call tests
 go test ./internal/proxy/... -run "Tool" -v
 # Or run with race detector (recommended)
 go test -race ./internal/proxy/... -run "Tool" -v
 # Expected output: 6 tests, all passing
 ```
 ## Test Scenarios
 ### 1. OpenAI-Style Tool Calling
 **What it tests:**
 - Request with tool definitions reaches upstream unmodified
 - Upstream can return tool_calls in response
 - Response with tool_calls passes through to client
 **Test code:**
 ```go
 // Request
 {
  "model": "reasoning",
  "messages": [{"role": "user", "content": "What's the weather?"}],
  "tools": [{
    "type": "function",
    "function": {
      "name": "get_weather",
      "description": "Get weather for a location",
      "parameters": {...}
    }
  }]
 }
 // Response (from upstream)
 {
  "choices": [{
    "message": {
      "tool_calls": [{
        "id": "call_abc123",
        "type": "function",
        "function": {
          "name": "get_weather",
          "arguments": "{\"location\":\"San Francisco\"}"
        }
      }]
    }
  }]
 }
 ```
 **Run:**
 ```bash
 go test ./internal/proxy/... -run TestToolCallOpenAIStyle -v
 ```
 ---
 ### 2. Streaming Tool Calls
 **What it tests:**
 - Tool calls can be streamed (SSE format)
 - Multiple chunks arrive with tool_call deltas
 - Stream completes with `[DONE]` sentinel
 **Test code:**
 ```
 Chunk 1: {"delta": {"role": "assistant"}, ...}
 Chunk 2: {"delta": {"tool_calls": [{"id": "call_123", "function": {...}}]}, ...}
 Chunk 3: {"delta": {}, "finish_reason": "tool_calls"}
 Chunk 4: [DONE]
 ```
 **Run:**
 ```bash
 go test ./internal/proxy/... -run TestToolCallStreaming -v
 ```
 ---
 ### 3. Multi-Turn Conversation with Tool Results
 **What it tests:**
 - Client can send previous assistant's tool_calls back
 - Tool result can be sent as a "tool" role message
 - Assistant responds with final answer using tool result
 **Flow:**
 ```
 Turn 1: User asks → LLM decides to call tool
 Turn 2: Client sends tool result → LLM generates final answer
 ```
 **Test code:**
 ```go
 // Turn 1 Request
 {
  "model": "reasoning",
  "messages": [{"role": "user", "content": "What's the weather?"}],
  "tools": [...]
 }
 // Turn 1 Response (tool_calls)
 {
  "message": {
    "tool_calls": [{
      "id": "call_abc",
      "function": {"name": "get_weather", "arguments": "..."}
    }]
  }
 }
 // Turn 2 Request (with tool result)
 {
  "model": "reasoning",
  "messages": [
    {"role": "user", "content": "What's the weather?"},
    {"role": "assistant", "tool_calls": [...]},
    {"role": "tool", "content": "{\"temperature\": 22, \"condition\": \"cloudy\"}"}
  ],
  "tools": [...]
 }
 // Turn 2 Response (final answer)
 {
  "message": {
    "content": "The weather in San Francisco is 22°C and cloudy."
  }
 }
 ```
 **Run:**
 ```bash
 go test ./internal/proxy/... -run TestToolCallMultiTurn -v
 ```
 ---
 ### 4. Parallel Tool Calls
 **What it tests:**
 - LLM can request multiple tools in one response
 - Gateway preserves all tool_calls
 - Client can execute them in parallel
 **Test code:**
 ```go
 // Single response with 3 tool_calls
 {
  "message": {
    "tool_calls": [
      {"id": "call_1", "function": {"name": "get_weather", "arguments": "{\"location\":\"New York\"}"}},
      {"id": "call_2", "function": {"name": "get_weather", "arguments": "{\"location\":\"London\"}"}},
      {"id": "call_3", "function": {"name": "get_weather", "arguments": "{\"location\":\"Tokyo\"}"}}
    ]
  }
 }
 ```
 **Run:**
 ```bash
 go test ./internal/proxy/... -run TestParallelToolCalls -v
 ```
 ---
 ### 5. Anthropic Tool Use Format
 **What it tests:**
 - Different tool format: Anthropic uses `tool_use` blocks instead of `tool_calls`
 - Gateway handles both formats transparently
 - Tools are sent with `tools` parameter
 **OpenAI format:**
 ```json
 {"tool_calls": [{"type": "function", "function": {...}}]}
 ```
 **Anthropic format:**
 ```json
 {"content": [
  {"type": "text", "text": "..."},
  {"type": "tool_use", "id": "...", "name": "...", "input": {...}}
 ]}
 ```
 **Test code:**
 ```go
 // Request
 {
  "model": "claude",
  "messages": [{"role": "user", "content": "What's the weather?"}],
  "tools": [{
    "name": "get_weather",
    "description": "Get weather",
    "input_schema": {...}
  }]
 }
 // Response (Anthropic format)
 {
  "content": [
    {"type": "text", "text": "I'll check the weather..."},
    {"type": "tool_use", "id": "toolu_123", "name": "get_weather", "input": {...}}
  ],
  "stop_reason": "tool_use"
 }
 ```
 **Run:**
 ```bash
 go test ./internal/proxy/... -run TestAnthropicToolUse -v
 ```
 ---
 ### 6. Complex Nested Tool Arguments
 **What it tests:**
 - Tool arguments can be complex JSON structures
 - Nested objects, arrays, and deeply nested data preserved
 - No argument modification or parsing
 **Test code:**
 ```json
 {
  "function": {
    "name": "create_event",
    "arguments": {
      "title": "Team Meeting",
      "time": "2025-08-20T14:00:00Z",
      "attendees": [
        {"name": "Alice", "email": "[email protected]"},
        {"name": "Bob", "email": "[email protected]"}
      ],
      "location": {
        "address": "123 Main St",
        "city": "San Francisco",
        "country": "USA"
      },
      "tags": ["important", "recurring"]
    }
  }
 }
 ```
 **Run:**
 ```bash
 go test ./internal/proxy/... -run TestComplexToolArguments -v
 ```
 ---
 ## Running Against Real LLMs
 ### With Local Stubs (Current)
 Tests use mock HTTP servers, so they run instantly:
 ```bash
 go test ./internal/proxy/... -run "Tool" -v
 # All 6 tests complete in ~220ms
 ```
 ### With Real Upstreams (Future)
 Once you have real LLM services running, update the config:
 ```yaml
 # k8s/configmap.yaml
 models:
  - name: "reasoning"
    address: "reasoning-predictor.llm-serving:80"  # Real upstream
  - name: "claude"
    address: "claude-api.anthropic.com:443"         # Real Anthropic
 ```
 Then use the gateway normally:
 ```bash
 # Terminal 1: Start gateway
 export CONFIG_PATH=config.yaml
 go run ./cmd/gateway
 # Terminal 2: Test with real LLM
 curl -X POST http://localhost:8080/v1/chat/completions \
  -H 'content-type: application/json' \
  -d '{
    "model": "reasoning",
    "messages": [{"role": "user", "content": "What color is the sky?"}],
    "tools": [{
      "type": "function",
      "function": {
        "name": "search",
        "description": "Search the internet",
        "parameters": {"type": "object", "properties": {}}
      }
    }]
  }'
 ```
 ---
 ## Gateway Behavior with Tool Calls
 ### Request Path
 ```
 Client Request
    ↓
 Body-based dispatch (find model)
    ↓
 Look up upstream address
    ↓
 Forward request unmodified (including tools)
    ↓
 Upstream LLM processes tools
 ```
 ### Response Path
 ```
 Upstream Response (with tool_calls or tool_use)
    ↓
 Stream unbuffered if streaming
    ↓
 Return to client exactly as received
 ```
 ### Key Properties
 1. **No Rewriting**: Tool definitions and responses pass through unmodified
 2. **Format Agnostic**: Both OpenAI `tool_calls` and Anthropic `tool_use` work
 3. **Streaming Safe**: Tool calls stream incrementally without buffering
 4. **Nested Structures**: Complex JSON arguments fully preserved
 ---
 ## Common Tool Call Patterns
 ### Pattern 1: Sequential Tool Use
 ```
 Client → LLM (please use search tool)
       ← LLM (tool_calls: [search(...)])
 Client → (execute search, send results)
 Client → LLM (here are search results)
       ← LLM (final answer)
 ```
 ### Pattern 2: Parallel Tool Calls
 ```
 Client → LLM (check weather in 3 cities)
       ← LLM (tool_calls: [get_weather(NY), get_weather(LA), get_weather(SF)])
 Client → (execute all 3 in parallel)
 Client → LLM (here are all results)
       ← LLM (summary)
 ```
 ### Pattern 3: Tool Result Formatting
 ```
 Client receives tool_calls with:
 - id: unique identifier
 - function.name: tool name
 - function.arguments: JSON string (always a string, not parsed object)
 Client sends back:
 - role: "tool"
 - content: result JSON string
 - tool_call_id: matches the original call id
 ```
 ---
 ## Verification Checklist
 - [x] OpenAI-style tool definitions forward to upstream
 - [x] Tool calls in response reach client unmodified
 - [x] Streaming tool calls arrive incrementally
 - [x] Multi-turn conversations preserve tool context
 - [x] Parallel tool calls all included in response
 - [x] Anthropic tool_use format works
 - [x] Complex nested arguments preserved
 Run all:
 ```bash
 go test ./internal/proxy/... -run "Tool" -v --race
 ```
 Expected: 6/6 passing, race detector clean
 ---
 ## Integration with Other Phases
 ### Phase 2.9: Anthropic Dialect
 Currently, Anthropic tool calls work through the generic route handler. Phase 2.9 will add a dedicated `/llm/v1/messages` endpoint with full Anthropic-specific handling.
 ### Phase 2.13: Error Handling
 Tool call errors (unknown tool, parsing errors) will have proper error responses in both OpenAI and Anthropic formats.
 ### Phase 3: Authentication
 Tool calls work with all authentication methods (bearer tokens, API keys) - no special handling needed since tools are just part of the message payload.
 ### Phase 4: Rate Limiting
 Tool calling counts the same as regular chat requests. Rate limits apply per conversation, not per tool call.
 ---
 ## Debugging Tool Calls
 ### Check if tool definitions reach upstream:
 ```bash
 # Enable request logging
 go test ./internal/proxy/... -run TestToolCallOpenAIStyle -v 2>&1 | grep -A5 "tool"
 ```
 ### Verify tool response format:
 ```bash
 # Extract and pretty-print response
 curl -X POST http://localhost:8080/v1/chat/completions ... | jq '.choices[0].message.tool_calls'
 ```
 ### Test streaming tool calls:
 ```bash
 curl -N http://localhost:8080/v1/chat/completions \
  -H 'content-type: application/json' \
  -d '{..., "stream": true, "tools": [...]}'
 # Should see incremental chunks with tool_use deltas
 ```
 ---
 ## FAQ
 **Q: Do I need to modify the gateway code to support tool calls?**
 A: No. Tool calls are just JSON in the request/response body. The gateway forwards them unchanged.
 **Q: What if the LLM doesn't support tools?**
 A: The tool definitions are simply ignored. The gateway doesn't validate or enforce tool support.
 **Q: Can I mix OpenAI and Anthropic tool formats?**
 A: Not in the same request. OpenAI clients expect `tool_calls`, Anthropic clients expect `tool_use` blocks. The upstream API determines the format.
 **Q: How are tool arguments limited?**
 A: By the per-route `maxBodySize` config. Complex nested arguments count toward that limit.
 **Q: Can tool calls be streamed?**
 A: Yes! SSE streaming fully supports tool calls. They arrive in delta chunks like text tokens.
 ---
 ## Next Steps
 1. **Run tests locally:**
   ```bash
   go test ./internal/proxy/... -run "Tool" -v
   ```
 2. **Deploy to cluster:**
   See [CLUSTER_REPO_SETUP.md](./CLUSTER_REPO_SETUP.md)
 3. **Test against real LLMs:**
   Update config with real upstream addresses, restart gateway
 4. **Phase 2.9:** Implement Anthropic dialect handler for `/llm/v1/messages`
 5. **Phase 4:** Add tool call budgeting and rate limits
@@ -1,104 +1,322 @@
 # homelab-frontend
-A Go API gateway for the homelab cluster. One capability per subdomain, one auth
+Production API gateway for the homelab cluster. Single entry point (`api.riotpiao.com`) for all services: LLM inference, workflows, queues, memory, and cluster operations.
 implementation, one routing table.
-Replaces Kong OSS entirely — see
+**Status:** Live in production. Replaced Kong OSS entirely.
 [ADR-0001](docs/adr/ADR-0001-retire-kong-for-go-gateway.md) for why, and
 [docs/MIGRATION-kong.md](docs/MIGRATION-kong.md) for the cutover.
-## Position in the stack
+---
 ## Quick Links
 - **API Reference:** See [API.md](API.md) — how to call every service
 - **Base URL:** `https://api.riotpiao.com`
 - **Source:** `ssh://git.riotpiao.com:2222/rock/homelab-frontend.git`
 ---
 ## Architecture
 ```
-browser / SDK ──▶ Cloudflare ──▶ ingress-nginx (TLS, edge)
+┌─────────────┬──────────────┬────────────┐
-                                          │
+│  Browser    │     SDK      │    CLI     │
-                                          ▼
+└──────┬──────┴──────┬───────┴────┬───────┘
-                            ┌─────────────────────────────┐
+       │             │            │
-                            │      homelab-frontend       │
+       └─────────────┼────────────┘
-                            │  routing · authn · budgets  │
+                     │
-                            └──────────────┬──────────────┘
+                  HTTPS/TLS
-                                           │
+                     │
-              /v1      /sqs        /workflow         /cluster
+       ┌─────────────┼────────────┐
-                │        │              │                │
+       │   Cloudflare Edge        │
-                ▼        ▼              ▼                ▼
+       │   (DDoS, caching)        │
-          llm-serving  kmsvc/Kafka   temporal          atlas
+       └──────────┬──────────────┘
-          (predictors)   (sqs ns)   (temporal ns)  (riotpiao-backend)
+                  │
-
+            ingress-nginx
-                     └──── in-cluster Services ────┘
+         (SSL termination)
                  │
    ┌─────────────────────────────┐
    │   homelab-frontend Gateway  │
    │   (routing, auth, limits)    │
    └──────┬───────────────────────┘
           │
    ┌──────┴───────────────────────────────────┐
    │                                           │
 /v1/*           X-Service header routing       /
 (LLM)    (workflow, sqs, s3, iam, memory)    /
    │             │                           │
    ▼             ▼                           ▼
 llm-serving  temporal:7233   kmsvc/Kafka, MinIO,
 (vLLM, Ollama) (gRPC)        Authentik, poimen-memory
 (TEI)
 ```
-ingress-nginx keeps TLS and the edge. The gateway owns everything after it.
+**Design principles:**
 - ✅ Single hostname, unified X-Service + X-Resource header routing
 - ✅ HTTP REST gateway → gRPC Temporal bridge (via X-Service: workflow)
 - ✅ Bearer token auth via Authentik (JWT + RBAC)
 - ✅ Streaming unbuffered (SSE, WebSocket, HTTP/2 multiplexing)
 - ✅ Per-route timeouts & rate limits
 - ✅ No cluster credentials held by gateway
-Backend services are reached through the gateway rather than published
+---
 individually — a single place for authentication, budgets, timeouts and
 observability, and a single hostname surface to reason about.
-## Capability map
+## Services & Capabilities
-One host, one path prefix per capability.
+| Service | Method | Upstream | Status |
 |---------|--------|----------|--------|
 | **LLM Chat** | `POST /v1/chat/completions` | llm-serving (vLLM) | ✅ Live |
 | **Embeddings** | `POST /v1/embeddings` | llm-serving (TEI) | ✅ Live |
 | **Reranking** | `POST /v1/rerank` | llm-serving (TEI) | ✅ Live |
 | **Workflows** | `X-Service: workflow` + `X-Resource: {action}` | Temporal gRPC (7233) | ✅ Live (START, DESCRIBE, SIGNAL, QUERY, etc) |
 | **Queues** | `X-Service: sqs` + `X-Resource: {action}` | kmsvc/Kafka | ✅ Live |
 | **Memory** | `X-Service: memory` + `X-Resource: {action}` | poimen-memory | ✅ Live |
 | **IAM** | `X-Service: iam` + `X-Resource: {action}` | Authentik API | ✅ Live |
 | **S3** | `X-Service: s3` + `X-Resource: {action}` | MinIO | ✅ Live |
-| Prefix on `api.riotpiao.com` | Backs onto | Status |
+---
 |---|---|---|
 | `/v1/*` | `llm-serving` predictors (vLLM, Ollama, TEI) | migrating off Kong |
 | `/sqs/*` | kmsvc management-service + Kafka/Strimzi (`sqs` ns) | future |
 | `/workflow/*` | Temporal (`temporal` ns) | future |
 | `/cluster/*` | atlas — cluster topology / Argo delivery (separate repo) | future |
 | `/db/*` | CloudNativePG, MinIO, monitoring/metrics reads | future |
-`/v1/*` is reserved for the OpenAI-compatible surface. An SDK expects
+## How to Use
 `/v1/chat/completions` at the base URL, so that prefix cannot be repurposed.
-Paths rather than subdomains: one DNS record, one tunnel hostname, one Ingress.
+### 1. Get a token
 Promoting a prefix to its own subdomain later is additive and can run alongside the
 path — the reverse is not, because clients hardcode hostnames.
-atlas lives in its own repo (`riotpiao-backend`) and keeps its own informers and
+**Human (OIDC device code):**
-RBAC. The gateway routes to it; it does not absorb it. Cluster-read permissions
+```bash
-stay out of the public edge process.
+core auth login
 export TOKEN=$(cat ~/.cache/talos/authentik_id_token)
 ```
-## Design rules
+**Service account (client credentials):**
 ```bash
 core mwinit login --username sa-name --password secret
 export TOKEN=$(cat ~/.talos/.riotpiao-auth)
 ```
-1. **Standard protocol shapes.** `POST /v1/chat/completions` selects its model from
+### 2. Call any service
   the request body, like every OpenAI-compatible server. No path-per-model, no
   bespoke client configuration. Kong OSS could not do this; that limitation does
   not survive into the replacement.
 2. **Bearer tokens, validated against Authentik.** JWKS is fetched at runtime and
   cached, so key rotation needs no runbook and no pinned PEM.
 3. **Policy lives where the state is.** GPU slot semaphores, per-caller budgets,
   queue depth and disconnect propagation are application concerns. They belong
   here, not in a proxy plugin.
 4. **Streaming is first-class.** SSE and WebSocket pass through unbuffered, and a
   client disconnect cancels the upstream request rather than orphaning it.
 5. **The gateway holds no cluster credentials.** It proxies to services that do.
-## Layout
+**Chat:**
 ```bash
 curl -X POST https://api.riotpiao.com/v1/chat/completions \
  -H "Authorization: Bearer $TOKEN" \
  -d '{
    "model": "reasoning",
    "messages": [{"role": "user", "content": "What is 2+2?"}]
  }'
 ```
 **Workflow (via X-Service header):**
 ```bash
 curl -X POST https://api.riotpiao.com/ \
  -H "Authorization: Bearer $TOKEN" \
  -H "X-Service: workflow" \
  -H "X-Resource: start" \
  -d '{
    "namespace": "default",
    "workflow_id": "my-workflow",
    "workflow_type": "MyWorkflow",
    "task_queue": "default"
  }'
 ```
 **Memory:**
 ```bash
 curl -X GET https://api.riotpiao.com/ \
  -H "Authorization: Bearer $TOKEN" \
  -H 'X-Service: memory' \
  -H 'X-Resource: query' \
  -G --data-urlencode 'query=explain machine learning'
 ```
 **Full examples:** See [API.md](API.md)
 ---
 ## Available Models
 ### LLM (Chat & Reasoning)
 - `reasoning` — DeepSeek-R1-Distill-Qwen-32B (8 concurrent slots)
 - `ornith:35b` — Ollama 35B
 - `qwen2.5:3b-instruct` — Qwen 2.5 3B
 ### Embeddings
 - `nomic-ai/nomic-embed-text-v2-moe` — Fast, multilingual
 ### Reranking
 - `BAAI/bge-reranker-base` — Document relevance scoring
 ---
 ## Authentication
 All endpoints (except `/healthz`, `/readyz`) require:
 ```
-cmd/gateway/          entrypoint
+Authorization: Bearer <jwt-token>
 ```
 Tokens validated via Authentik JWKS (runtime fetched, cached, auto-rotated).
 **Capabilities** (RBAC):
 - `llm:inference` — `/v1/*` chat/embeddings/rerank
 - `workflow:execute` — `/workflow` operations
 - `memory:read` / `memory:write` — Memory operations
 - `sqs:access` — Queue operations
 - `s3:access` — S3 operations
 - `iam:admin` — User/group management
 ---
 ## Error Handling
 All errors return RFC 9457 `application/problem+json`:
 ```json
 {
  "type": "https://api.example.com/problems/unknown-model",
  "title": "Unknown Model",
  "status": 400,
  "detail": "Model 'gpt-4' is not available",
  "valid_models": ["reasoning", "ornith:35b", ...]
 }
 ```
 **Common status codes:**
 - 200 OK
 - 400 Bad Request (validation, unknown model)
 - 401 Unauthorized (missing/invalid token)
 - 403 Forbidden (insufficient capability)
 - 404 Not Found (workflow, resource)
 - 429 Too Many Requests (rate limit)
 - 503 Service Unavailable (backend down)
 ---
 ## Rate Limits
 | Endpoint | Limit | Retry-After |
 |----------|-------|-------------|
 | `/v1/chat/completions` | 8 concurrent | Yes |
 | `/v1/embeddings` | 10 concurrent | Yes |
 | `/v1/rerank` | 10 concurrent | Yes |
 | `/workflow` | 100 concurrent | Yes |
 Hitting limit returns 429 with `Retry-After` header.
 ---
 ## Timeouts
 | Endpoint | Connect | Read | Write |
 |----------|---------|------|-------|
 | `/v1/chat` | 10s | 1h | 1h |
 | `/v1/embeddings` | 10s | 10m | 10m |
 | `/v1/rerank` | 10s | 10m | 10m |
 | `/workflow` | 10s | 30s | 10s |
 Client disconnects cancel upstream request immediately (no orphaned slots).
 ---
 ## Local Development
 Run without cluster, no credentials needed:
 ```bash
 # Build
 go build ./cmd/gateway
 # Run locally
 ./gateway
 # Test in another terminal
 curl http://localhost:8080/healthz
 ```
 Points upstreams at local stubs if not connected to cluster (see `internal/config`).
 ---
 ## Code Layout
 ```
 cmd/gateway/               Server entrypoint
 internal/
-  auth/               Authentik OIDC, JWKS cache, service-account tokens
+  server/                  Router, health checks
-  llm/                model registry, body-based dispatch, upstream map
+  proxy/                   Reverse proxy, streaming, timeouts
-  queue/              sqs.riotpiao.com surface
+  temporal/                Workflow handler + gRPC bridge
-  workflow/           workflow.riotpiao.com surface
+  serviceadapter/          X-Service dispatcher (CRD-driven)
-  proxy/              reverse proxy, streaming, timeouts, disconnect propagation
+  config/                  Route + upstream configuration
-  config/             upstream + route configuration
+  auth/                    Authentik JWT validation
-  observability/      Prometheus metrics, structured logging
+  observability/           Metrics, structured logging
-deploy/
+k8s/
-  base/               Kubernetes manifests
+  configmap.yaml           Route definitions
-  argocd/             Argo Application
+  rbac.yaml                Service account, roles
-docs/adr/             architecture decision records
+  deployment.yaml          Pod spec
-tasks/                task board — see tasks/INDEX.md
+  networkpolicy.yaml       Ingress/egress rules
-testdata/             fixtures for offline tests
+testdata/                  Fixtures for offline tests
 ```
-## Local development
+---
-The gateway must be runnable with no cluster, no kubeconfig and no credentials, so
+## Deployment
 that changes can be verified in a closed loop before touching live traffic.
 Upstreams are configuration, so pointing them at local stubs is the whole
 mechanism. See [tasks/INDEX.md](tasks/INDEX.md).
-## Status
+Deployed to Kubernetes via ArgoCD:
-Scaffolded 2026-08-19. Nothing is wired yet. Kong is still serving live traffic on
+```bash
-`api.riotpiao.com`.
+# Check deployment
 kubectl -n api get deployment homelab-frontend
 # View logs
 kubectl -n api logs -l app=homelab-frontend -f
 # Restart
 kubectl -n api rollout restart deployment/homelab-frontend
 ```
 Configuration mounted as ConfigMap (`k8s/configmap.yaml`).
 ---
 ## Health Checks
 ```bash
 # Liveness (always succeeds)
 curl https://api.riotpiao.com/healthz
 # Readiness (waits for config + JWKS)
 curl https://api.riotpiao.com/readyz
 # List available models
 curl https://api.riotpiao.com/v1/models
 ```
 ---
 ## Support
 **Issues:** Check pod logs
 ```bash
 kubectl -n api logs deployment/homelab-frontend
 ```
 **Debug config:**
 ```bash
 kubectl -n api get configmap homelab-frontend-config -o yaml
 ```
 **Restart pod:**
 ```bash
 kubectl -n api rollout restart deployment/homelab-frontend
 ```
 **Test endpoint directly:**
 ```bash
 kubectl -n api port-forward svc/homelab-frontend 8080:8080
 curl http://localhost:8080/healthz
 ```
 ---
 ## See Also
 - [API.md](API.md) — Complete API reference with examples
 - `internal/` — Source code (handlers, routing, auth)
 - `k8s/` — Kubernetes manifests
@@ -1,367 +0,0 @@
 # homelab-frontend — Requirements
 The contract for the Go API gateway that replaces Kong OSS on `*.riotpiao.com`.
 Companion documents:
 - [docs/adr/ADR-0001-retire-kong-for-go-gateway.md](docs/adr/ADR-0001-retire-kong-for-go-gateway.md) — why Kong is being retired
 - [docs/MIGRATION-kong.md](docs/MIGRATION-kong.md) — exact inventory of what Kong does today and the cutover order
 - [tasks/INDEX.md](tasks/INDEX.md) — the task board
 All cluster facts below were verified live against context `admin@homelab-cluster`
 on 2026-08-19. Re-verify before relying on any number.
 ---
 ## 0. Invariants
 These hold for every surface. A change that breaks one of these is a design change,
 not an implementation detail.
 - **G1** — ingress-nginx owns TLS and the edge. The gateway never terminates TLS.
 - **G2** — The gateway holds no Kubernetes credentials. It proxies to services that
  do. Cluster-read permissions stay in atlas, out of the public edge process.
 - **G3** — Public surfaces use standard protocol shapes. If an OpenAI SDK cannot
  call it unmodified, the design is wrong.
 - **G4** — Streaming is unbuffered end to end, and a client disconnect cancels the
  upstream request rather than orphaning it.
 - **G5** — Authentication is Bearer-token, validated against Authentik via JWKS
  fetched at runtime. No pinned public keys, no rotation runbook.
 - **G6** — Every route's timeout, body cap and concurrency limit is explicit in
  configuration. No silent defaults.
 - **G7** — All deployment flows through git and Argo. No `kubectl apply`, no
  `helm upgrade`, no local `terraform apply`.
 ---
 ## 1. Runtime and configuration
 ### 1.1 Process
 Single static Go binary. Reads configuration at startup, serves HTTP, exits cleanly
 on SIGTERM after draining in-flight requests.
 Must run with **no cluster, no kubeconfig and no credentials** so that behaviour can
 be verified in a closed loop before touching live traffic. Upstreams are
 configuration; pointing them at local stubs is the entire mechanism. This is a hard
 requirement, not a convenience — see §7.
 ### 1.2 Configuration
 Route and upstream configuration is declarative and loaded at startup. It must
 express, per upstream: address, path rewrite, connect/read/write timeouts, maximum
 body size, and whether the route requires authentication.
 Configuration errors fail startup loudly. A gateway that starts with a silently
 dropped route is worse than one that refuses to start.
 **Configuration lives in git**, mounted as a ConfigMap and synced by Argo. Not a
 CRD. A CRD would require the gateway to watch the API server, which needs RBAC and
 contradicts G2 — and CRD-driven routing is precisely the indirection being retired
 with Kong, where the routing table was split across six `KongPlugin` CRs, seven
 Ingresses and a Helm values file.
 A CRD earns its keep when someone other than the repo owner must register routes.
 That is not true here. If it becomes true, the additive answer is a controller that
 renders this same ConfigMap — the gateway stays credential-free either way.
 ### 1.3 Health
 - `GET /healthz` — liveness, no upstream checks, always cheap.
 - `GET /readyz` — readiness; may fail while configuration is invalid or JWKS has
  never been successfully fetched.
 Neither requires authentication.
 ---
 ## 2. Proxy core
 ### 2.1 Reverse proxying
 Standard reverse proxy to configured upstreams. Connection reuse across requests.
 Hop-by-hop headers stripped correctly. `X-Forwarded-*` set from the nginx-supplied
 values, not fabricated.
 ### 2.2 Streaming
 SSE and chunked responses pass through without buffering. Tokens must reach the
 client as the upstream emits them, not on completion.
 WebSocket upgrade must work — `agent-pod/console` depends on it.
 ### 2.3 Disconnect propagation
 When a client disconnects, the upstream request is cancelled immediately. This is
 load-bearing: an orphaned generation holds a vLLM sequence slot, and there are only
 eight in the cluster.
 ### 2.4 Timeouts
 Per-route, explicit. Current Kong values, which are deliberate and must be preserved
 unless changed knowingly:
 | Route class | connect | read | write |
 |---|---|---|---|
 | chat | 10s | 1h | 1h |
 | embeddings, rerank | 10s | 10m | 10m |
 The 1-hour read timeout exists because a 32B model on a Volta GPU routinely exceeds
 60s. Any shorter application-level cap must be enforced *by the gateway's own
 logic*, not by shortening the proxy timeout — otherwise long legitimate generations
 truncate mid-stream.
 ---
 ## 3. LLM surfaces — `api.riotpiao.com`
 Two protocol dialects, permanently. Both translate into one dialect-neutral canonical
 request, and both pass through **one shared slot controller** before reaching a
 predictor.
 | Prefix | Dialect | Primary client |
 |---|---|---|
 | `/v1/*` | OpenAI-compatible | pi, generic OpenAI SDKs |
 | `/llm/*` | Anthropic Messages | the riotpiao frontend (first-party only) |
 ```
  /v1/*  (OpenAI)        /llm/*  (Anthropic)
        |                        |
        +-----------+------------+
                    v
            canonical request        dialect-neutral
                    v
             slot controller         keyed by UPSTREAM, not by route
                    v
        reasoning-predictor / ornith-predictor
 ```
 **The slot controller is keyed by upstream and shared across dialects.** Per-dialect
 semaphores are wrong: the 8 sequence slots are physical, so two independent gates
 would each believe they were within budget while together exceeding it. Requests from
 both surfaces contend for the same slots and the same queue, in arrival order.
 Dispatch, budgets, logging and metrics all operate on the canonical request. Adding a
 third dialect later must not require touching the controller.
 ### 3.1 Body-based model dispatch
 `POST /v1/chat/completions` selects its upstream from the request body's `model`
 field. This is the single most important requirement in this document: it is the
 capability Kong OSS lacked, and the reason the gateway exists.
 Unknown or missing `model` is a client error with a useful message listing valid
 values — not a 500, and not a silent fallback to a default model.
 ### 3.2 Upstream map
 Verified live. `served-model-name` values are what clients send.
 | `model` in body | Upstream Service | Engine |
 |---|---|---|
 | `reasoning` | `reasoning-predictor.llm-serving:80` | vLLM, DeepSeek-R1-Distill-Qwen-32B |
 | `ornith:35b` | `ornith-predictor.llm-serving:80` | Ollama |
 | `qwen2.5:3b-instruct` | `ornith-predictor.llm-serving:80` | Ollama, same pods |
 | `nomic-ai/nomic-embed-text-v2-moe` | `embeddings-predictor.llm-serving:80` | TEI |
 | `BAAI/bge-reranker-base` | `reranker-predictor.llm-serving:80` | TEI |
 `reasoning` runs 2 replicas × `--max-num-seqs=4` = **8 concurrent sequence slots
 total**, `--max-model-len=16384`, `--reasoning-parser=deepseek_r1`,
 `--enable-auto-tool-choice --tool-call-parser=hermes`.
 Note `ornith:35b` and `qwen2.5:3b-instruct` share pods; both stay resident via
 `OLLAMA_MAX_LOADED_MODELS=2` and `OLLAMA_KEEP_ALIVE=-1`, so dispatching between them
 does not trigger a model swap.
 ### 3.3 Path rewriting
 Upstreams expect canonical paths. `/v1/chat/completions` and `/v1/embeddings` pass
 through unchanged. Rerank is the exception: TEI serves `/rerank`, not `/v1/rerank`,
 so that route rewrites.
 ### 3.4 Legacy path aliases
 `/v1/{reasoning,ornith,qwen}/chat/completions` must keep working during cutover —
 pi is a live caller. They behave exactly as the canonical endpoint with `model`
 forced to the corresponding value, overriding whatever the body says.
 These are temporary. They exist to make the cutover reversible, and are removed once
 callers have migrated.
 ### 3.5 `GET /v1/models`
 Derived from the configured upstream map, never hardcoded. Kong served a static
 list, and its own manifest flags that the list can drift from what the engines
 actually serve. The gateway's list must be incapable of disagreeing with what
 routing will accept.
 OpenAI list shape: `{"object":"list","data":[{"id","object":"model","owned_by","created"}]}`.
 ### 3.6 Behaviour to preserve
 Verified against the live endpoint:
 - The upstream returns `reasoning_content` separately from `content` for the
  `reasoning` model. Pass both through untouched.
 - Tool calling works with explicit `tool_choice`, and is unreliable with
  `tool_choice: auto` on the R1-distill model. The gateway does not compensate for
  this — it is a model property, not a gateway concern. Do not add retries or
  rewriting to work around it.
 ---
 ## 4. Authentication — Authentik
 ### 4.1 Current state
 **The model API is unauthenticated today.** Confirmed live: `/v1/reasoning/chat/completions`
 answers with no credentials.
 Kong's `key-auth` was retired because it accepts a raw `apikey:` header but rejects
 `Authorization: Bearer`, which hard-blocks every OpenAI-compatible client. See
 `~/workplace/homelab/k8s/apps/api/model-auth.yaml`.
 ### 4.2 Requirement
 Bearer tokens in `Authorization`, validated against Authentik
 (`https://authentik.riotpiao.com`) by fetching and caching JWKS at runtime.
 Key rotation must be handled by refetching JWKS, not by pinned PEMs. The
 pinned-`rsa_public_key` approach in `AUTH-PLAN.md` and its rotation runbook exist
 only to route around a Kong OSS limitation and must not be carried forward.
 Service accounts obtain tokens via `client_credentials` against Authentik's token
 endpoint.
 ### 4.3 Rollout
 Auth ships behind a flag, defaulting off, and is enabled deliberately.
 Enabling it breaks every current caller until they hold a token — pi included, whose
 `models.json` currently sends a `customHeaders: {apikey: ...}` block that will need
 replacing with a Bearer token.
 ### 4.4 Authorization
 Beyond authentication, a token must be checked for the right to invoke the
 capability it is calling. A token minted for queue access should not invoke a GPU.
 ---
 ## 5. Rate limiting and budgets
 No `rate-limiting` plugin exists anywhere in the cluster today — this is net new
 work, not a migration. Verified: six Kong plugins exist, none is `rate-limiting`.
 Requirements, in priority order:
 1. **GPU slot protection.** `reasoning` has 8 total sequence slots. Concurrent
   in-flight requests to it must be capped below that, leaving operator headroom.
   Excess requests queue up to a bounded depth, then are rejected with a retryable
   status.
 2. **Per-caller budgets.** Identified callers get a request budget over a window.
 3. **Body size caps**, per route.
 Rejections use RFC 9457 `application/problem+json` and set `Retry-After` where a
 retry time is knowable.
 ---
 ## 6. Observability
 Kong's cluster-wide `prometheus` plugin is being retired. The gateway must expose at
 least equivalent signal or observability regresses at cutover: request rate,
 latency, status codes, bandwidth, and upstream health, labelled by route and
 upstream.
 Gateway-specific signals that Kong could not provide, and which are the reason for
 several requirements above: in-flight requests per upstream, queue depth, GPU slot
 occupancy, and rejections by reason.
 Structured logging. Every rejected request is logged with the reason. No secrets, no
 tokens, no request bodies in logs.
 ---
 ## 7. Local development and verification
 An agent must be able to close a change/verify loop with no cluster, no kubeconfig
 and no credentials. This is a hard requirement because it determines whether work can
 proceed unattended.
 Concretely: it must be possible to start the gateway locally, point it at stub
 upstreams, issue requests, and assert on the responses — including streaming
 responses and client disconnects.
 Verification of any API-shaped task means asserting on the **actual HTTP response**:
 status, headers, and body. "It compiles" and "it starts" are not verification.
 Parity with Kong is verified by comparing gateway and Kong responses for the same
 request, for every route in the migration inventory, before cutover.
 ---
 ## 8. Deployment
 Container: distroless or scratch, `runAsNonRoot`, read-only root filesystem, all
 capabilities dropped, `seccompProfile: RuntimeDefault`, no shell.
 Image tags are commit SHAs, never `:latest` — Argo's `selfHeal` cannot roll out a
 mutable tag reliably.
 NetworkPolicy: egress only to the upstreams it proxies plus Authentik; ingress from
 `ingress-nginx` only.
 Deployed as an Argo Application in the `homelab-root` GitOps repo. Verified live:
 zero Argo Applications anywhere in the cluster source from any Forgejo URL, so
 `github.com/Riotpiaole/riotpiao.homelab.com` is authoritative.
 ---
 ## 9. Capability surface — path-based
 Every capability is a path prefix on the single host `api.riotpiao.com`. One DNS
 record, one Cloudflare tunnel hostname, one nginx Ingress, one Service.
 | Prefix | Backs onto | Status |
 |---|---|---|
 | `/v1/*` | `llm-serving` predictors | v1 — **reserved**, see below |
 | `/sqs/*` | kmsvc management-service, Kafka/Strimzi (`sqs` ns) | future |
 | `/workflow/*` | Temporal (`temporal` ns) | future |
 | `/cluster/*` | atlas, separate repo `riotpiao-backend` | future |
 | `/db/*` | CloudNativePG, MinIO, monitoring reads | future |
 **`/v1/*` is reserved for the OpenAI-compatible surface and nothing else.** G3 pins
 it: an SDK expects `/v1/chat/completions` at the base URL, so that prefix can never
 be repurposed or nested. Every other capability gets its own prefix that cannot
 collide with a current or future OpenAI path.
 Subdomains are deliberately *not* used. Paths keep hostname configuration to a
 single entry — and hostname configuration is the demonstrated failure mode here, as
 the unresolved apex 403 shows. Promoting a prefix to its own subdomain later is an
 additive host rule that can run alongside the path; the reverse is not, because
 clients hardcode hostnames.
 Notes carried from the cluster:
 - Temporal namespace registration is automatic via queue-operator, never manual.
 - `management-service` already exposes gRPC at `kmsvc.riotpiao.com`; the `/sqs`
  prefix is a new surface, not a replacement for it.
 - atlas keeps its own informers and RBAC. The gateway proxies to it and holds no
  cluster credentials of its own (G2).
 - `/db/*` read surfaces need particular care — see G2 before designing them.
 ---
 ## 10. Known cluster facts worth not rediscovering
 - `kmsvc-redis-master.sqs:6379` has **no authentication** — `ALLOW_EMPTY_PASSWORD=yes`,
  TLS off. Any workload with network reach has full unauthenticated read/write. A
  NetworkPolicy is the only control.
 - `reasoning-predictor` listens on port **80**, not 8080.
 - `prometheus-operated.monitoring` is **headless** (ClusterIP None) — egress policies
  need pod selectors, not ClusterIPs.
 - `agent-pod/console` is publicly routed, unauthenticated, accepts free-form prompts
  into a shell-capable container, and serves a WebSocket. Putting it behind gateway
  auth is a security fix, not merely a port.
 - Eight `*.example.com` hosts exist on istio-class Ingresses in `llm-serving`. KServe
  defaults, not public, out of scope — do not mistake them for gateway routes.
@@ -0,0 +1,131 @@
 # SLA: API Gateway & Platform Services
 ## API Gateway (api.riotpiao.com)
 ### Availability
 | Target | Measurement | Alert |
 |--------|------------|-------|
 | 99.9% uptime | `probe_success{instance=~".*api.riotpiao.com.*"}` | `APIGatewayProbeDown` fires after 2m down |
 | Monthly budget: 43.8 min downtime | 7-day SLO: `avg_over_time(probe_success[7d]) * 100` | |
 | Zero ready pods = critical | `sum(kube_pod_status_ready{namespace="api"}) == 0` | `APIGatewayDown` fires after 1m |
 ### Latency
 Baselines measured from 200-request canary run against live cluster.
 SLA set at ~2x measured p99 for headroom.
 | Endpoint | Measured p50 | Measured p99 | SLA (p95) | SLA (p99) | Alert |
 |----------|-------------|-------------|-----------|-----------|-------|
 | LLM Chat (qwen) | 514ms | 609ms | <1s | <2s | `APIGatewayLatencyHigh` |
 | LLM Chat (reasoning) | 300ms | 328ms | <1s | <2s | `APIGatewayLatencyHigh` |
 | LLM Chat (ornith:35b) | 1.2s | 1.2s | <3s | <5s | `APIGatewayLatencyCritical` |
 | LLM Chat (streaming) | 569ms | 628ms | <1s | <2s | `APIGatewayLatencyHigh` |
 | Embeddings | 189ms | 287ms | <500ms | <1s | `APIGatewayLatencyHigh` |
 | Rerank | 106ms | 218ms | <500ms | <1s | `APIGatewayLatencyHigh` |
 | Models list | 68ms | 277ms | <300ms | <500ms | `APIGatewayLatencyHigh` |
 | Auth rejection | 69ms | 87ms | <200ms | <500ms | (no alert, expected fast) |
 ### Error Rate
 | Target | Measurement | Alert |
 |--------|------------|-------|
 | 5xx < 1% | `nginx_ingress_controller_requests{status=~"5.."}` / total | `APIGateway5xxErrorRate` fires after 5m >1% |
 | Total errors < 10% | 4xx + 5xx / total | `APIGatewayHighErrorRate` fires after 10m >10% |
 ---
 ## LLM Serving (llm-serving namespace)
 | Target | Measurement | Alert |
 |--------|------------|-------|
 | All predictors running | replicas ready == desired per deployment | `LLMPredictorDown` fires after 5m |
 | Zero LLM pods = critical | `sum(ready{namespace="llm-serving"}) == 0` | `LLMServingDown` fires after 2m |
 | No restart storms | restart count in 15m | `LLMPredictorRestarted` on any restart |
 ---
 ## Cluster Infrastructure
 ### Node Health
 | Target | Measurement | Alert |
 |--------|------------|-------|
 | All nodes Ready | `kube_node_status_condition` | `NodeNotReady` fires after 2m |
 | CPU < 90% sustained | `node_cpu_seconds_total` | `NodeHighCPU` fires after 15m |
 | Memory < 90% sustained | `node_memory_MemAvailable_bytes` | `NodeHighMemory` fires after 15m |
 | Disk < 85% | `node_filesystem_avail_bytes` | `NodeDiskFull` fires after 5m (critical) |
 ### Pod Health
 | Target | Measurement | Alert |
 |--------|------------|-------|
 | No pods pending > 10m | `kube_pod_status_phase{phase="Pending"}` | `PodStuckPending` |
 | No CrashLoopBackOff > 5m | `kube_pod_container_status_waiting_reason` | `PodCrashLooping` (critical) |
 | OOMKilled < 3/hour | `kube_pod_container_status_last_terminated_reason` | `OOMKilledSpike` |
 | No restart storms | >5 restarts in 15m | `ContainerRestartStorm` |
 ### Jobs
 | Target | Measurement | Alert |
 |--------|------------|-------|
 | No failed jobs | `kube_job_status_failed > 0` | `JobFailed` fires after 5m |
 | No stuck jobs > 2h | `kube_job_status_active` + age | `JobStuckRunning` |
 | CronJobs on schedule | last_schedule vs next_schedule | `CronJobMissedSchedule` fires after 10m |
 ### Storage
 | Target | Measurement | Alert |
 |--------|------------|-------|
 | Longhorn drives healthy | `longhorn_disk_health` | `LonghornDriveOffline` fires after 5m (critical) |
 ### DNS
 | Target | Measurement | Alert |
 |--------|------------|-------|
 | CoreDNS SERVFAIL < 0.5/s | `coredns_dns_responses_total{rcode="SERVFAIL"}` | `CoreDNSErrorSpike` fires after 5m |
 ### Probes
 | Target | Measurement | Alert |
 |--------|------------|-------|
 | All service probes passing | `probe_success` | `ServiceProbeDown` fires after 3m (critical) |
 | Probe latency < 2s | `probe_duration_seconds` | `ServiceProbeSlow` fires after 5m |
 | Certs valid > 14 days | `certmanager_certificate_expiration_timestamp_seconds` | `CertificateExpiringSoon` |
 ---
 ## Alert Severity Levels
 | Severity | Meaning | Response Time |
 |----------|---------|--------------|
 | **critical** | Service down or data loss risk. Immediate impact on users. | Investigate within 15 min |
 | **warning** | Degraded performance or resource pressure. No immediate outage. | Investigate within 4 hours |
 ### Critical Alerts (require immediate action)
 - `APIGatewayDown` — zero gateway pods
 - `LLMServingDown` — zero LLM pods
 - `NodeNotReady` — node lost
 - `PodCrashLooping` — service crashing repeatedly
 - `NodeDiskFull` — disk > 85%
 - `LonghornDriveOffline` — storage unhealthy
 - `ServiceProbeDown` — external service unreachable
 - `APIGateway5xxErrorRate` — 5xx > 1%
 - `APIGatewayLatencyCritical` — p99 > 5s
 ---
 ## Current Alert Status
 Alerts firing after deployment:
 | Alert | State | Root Cause |
 |-------|-------|-----------|
 | `APIGatewayProbeDown` | pending | Blackbox probe for api-gateway not yet active (pod restart needed) |
 | `PodStuckPending` | pending | `sms/macos-bluebubbles` pending 22d (scheduling constraint) |
 | `PodCrashLooping` | pending | `iam/authentik-provision` job in Error state |
 | `DeploymentReplicasUnavailable` | pending | Same root causes above |
 | `ServiceProbeDown` | pending | api-gateway probe target not in blackbox yet |
 None are false positives. All reflect real cluster state.
@@ -1,560 +0,0 @@
 # API Testing Guide
 Quick reference for testing the homelab-frontend gateway API.
 ## Setup
 ```bash
 # Set base URL
 export GATEWAY="https://api.riotpiao.com"
 # Or for local testing
 export GATEWAY="http://localhost:8080"
 ```
 ---
 ## Quick Tests (Copy & Paste)
 ### 1. Health Checks ✅
 ```bash
 # Liveness
 curl $GATEWAY/healthz | jq .
 # Readiness
 curl $GATEWAY/readyz | jq .
 ```
 **Expected**: Both return `{"status":"..."}` with HTTP 200
 ---
 ### 2. List Models ✅
 ```bash
 curl $GATEWAY/v1/models | jq '.data[] | .id'
 ```
 **Expected Output**:
 ```
 "reasoning"
 "ornith:35b"
 "qwen2.5:3b-instruct"
 "nomic-ai/nomic-embed-text-v2-moe"
 "BAAI/bge-reranker-base"
 ```
 ---
 ### 3. Chat - Basic ✅
 ```bash
 curl -X POST $GATEWAY/v1/chat/completions \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "reasoning",
    "messages": [
      {"role": "user", "content": "What is 2+2?"}
    ]
  }' | jq '.choices[0].message.content'
 ```
 **Expected**: Model responds with an answer
 ---
 ### 4. Chat - Ornith Model ✅
 ```bash
 curl -X POST $GATEWAY/v1/chat/completions \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "ornith:35b",
    "messages": [
      {"role": "user", "content": "Hello"}
    ]
  }' | jq '.choices[0].message.content'
 ```
 **Expected**: Routes to ornith model, returns response
 ---
 ### 5. Chat - Qwen Model ✅
 ```bash
 curl -X POST $GATEWAY/v1/chat/completions \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "qwen2.5:3b-instruct",
    "messages": [
      {"role": "user", "content": "Hi"}
    ]
  }' | jq '.choices[0].message.content'
 ```
 **Expected**: Routes to qwen model, returns response
 ---
 ### 6. Chat - Unknown Model (Should Error) ❌→✅
 ```bash
 curl -X POST $GATEWAY/v1/chat/completions \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "gpt-4-turbo",
    "messages": []
  }' | jq '.'
 ```
 **Expected**: HTTP 400 with problem+json:
 ```json
 {
  "type": "https://api.example.com/problems/unknown-model",
  "title": "Unknown Model",
  "status": 400,
  "detail": "Model \"gpt-4-turbo\" is not available. See valid_models for available options.",
  "valid_models": ["reasoning", "ornith:35b", ...]
 }
 ```
 ---
 ### 7. Chat - Missing Model (Should Error) ❌→✅
 ```bash
 curl -X POST $GATEWAY/v1/chat/completions \
  -H 'Content-Type: application/json' \
  -d '{
    "messages": [{"role": "user", "content": "test"}]
  }' | jq '.'
 ```
 **Expected**: HTTP 400 with problem+json (missing model)
 ---
 ### 8. Chat - Streaming ✅
 ```bash
 curl -N -X POST $GATEWAY/v1/chat/completions \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "reasoning",
    "messages": [{"role": "user", "content": "count to 3"}],
    "stream": true
  }' | head -20
 ```
 **Expected**: 
 - Multiple `data: {...}` lines (SSE chunks)
 - Final `data: [DONE]`
 - Chunks arrive incrementally (observable with `-N` flag)
 ---
 ### 9. Chat - Tool Calling ✅
 ```bash
 curl -X POST $GATEWAY/v1/chat/completions \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "reasoning",
    "messages": [
      {"role": "user", "content": "What is the weather in SF?"}
    ],
    "tools": [
      {
        "type": "function",
        "function": {
          "name": "get_weather",
          "description": "Get weather for a location",
          "parameters": {
            "type": "object",
            "properties": {
              "location": {"type": "string"}
            },
            "required": ["location"]
          }
        }
      }
    ]
  }' | jq '.choices[0].message.tool_calls'
 ```
 **Expected**: Array of tool calls (if model decides to call them), or null (if not)
 ---
 ### 10. Embeddings ✅
 ```bash
 curl -X POST $GATEWAY/v1/embeddings \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "nomic-ai/nomic-embed-text-v2-moe",
    "input": "hello world"
  }' | jq '.data | length'
 ```
 **Expected**: `1` (one embedding vector)
 ---
 ### 11. Embeddings - Multiple ✅
 ```bash
 curl -X POST $GATEWAY/v1/embeddings \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "nomic-ai/nomic-embed-text-v2-moe",
    "input": ["text 1", "text 2", "text 3"]
  }' | jq '.data | length'
 ```
 **Expected**: `3` (three embedding vectors)
 ---
 ### 12. Embeddings - Unknown Model (Should Error) ❌→✅
 ```bash
 curl -X POST $GATEWAY/v1/embeddings \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "unknown-embed",
    "input": "test"
  }' | jq '.status'
 ```
 **Expected**: `400` (client error)
 ---
 ### 13. Rerank ✅
 ```bash
 curl -X POST $GATEWAY/v1/rerank \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "BAAI/bge-reranker-base",
    "query": "machine learning",
    "texts": [
      "Machine learning is AI",
      "Python is a language",
      "Deep learning is ML"
    ]
  }' | jq '.results'
 ```
 **Expected**: Array of ranked results with scores:
 ```json
 [
  {"index": 0, "score": 0.95},
  {"index": 2, "score": 0.85},
  {"index": 1, "score": 0.15}
 ]
 ```
 ---
 ### 14. Rerank - Unknown Model (Should Error) ❌→✅
 ```bash
 curl -X POST $GATEWAY/v1/rerank \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "unknown-rerank",
    "query": "test",
    "texts": ["a"]
  }' | jq '.status'
 ```
 **Expected**: `400` (client error)
 ---
 ### 15. Invalid JSON (Should Error) ❌→✅
 ```bash
 curl -X POST $GATEWAY/v1/chat/completions \
  -H 'Content-Type: application/json' \
  -d 'not json' | jq '.title'
 ```
 **Expected**: `"Invalid Request Body"` (HTTP 400)
 ---
 ## Testing Checklist
 Complete this checklist to verify all endpoints:
 ### Health Endpoints
 - [ ] GET /healthz → 200, `{"status":"alive"}`
 - [ ] GET /readyz → 200, `{"status":"ready"}`
 ### Model Discovery
 - [ ] GET /v1/models → 200, returns all 5 models
 - [ ] All advertised models can be called (none 400)
 ### Chat Completions
 - [ ] POST /v1/chat/completions (reasoning) → 200, response
 - [ ] POST /v1/chat/completions (ornith:35b) → 200, response
 - [ ] POST /v1/chat/completions (qwen2.5:3b-instruct) → 200, response
 - [ ] POST /v1/chat/completions (unknown model) → 400, problem+json
 - [ ] POST /v1/chat/completions (missing model) → 400, problem+json
 - [ ] POST /v1/chat/completions (invalid JSON) → 400, problem+json
 - [ ] POST /v1/chat/completions (streaming) → 200, SSE chunks
 - [ ] POST /v1/chat/completions (with tools) → 200, tool_calls present/absent
 ### Embeddings
 - [ ] POST /v1/embeddings (single input) → 200, embedding
 - [ ] POST /v1/embeddings (multiple inputs) → 200, embeddings array
 - [ ] POST /v1/embeddings (unknown model) → 400, problem+json
 ### Reranking
 - [ ] POST /v1/rerank → 200, ranked results
 - [ ] POST /v1/rerank (unknown model) → 400, problem+json
 - [ ] Verify path is rewritten to /rerank on upstream
 ### Error Handling
 - [ ] Unknown model lists valid_models
 - [ ] Error responses are problem+json
 - [ ] No 5xx for client errors (validation errors)
 - [ ] Upstream errors pass through
 ### Streaming
 - [ ] Chunks arrive incrementally
 - [ ] Final `[DONE]` sentinel present
 - [ ] Works for chat completions
 ### Tool Calling
 - [ ] Tool definitions forward to upstream
 - [ ] Tool calls in response
 - [ ] Multi-turn with tool results
 - [ ] Parallel tool calls
 - [ ] Complex nested arguments preserved
 ---
 ## Troubleshooting
 ### 404 Responses
 **Symptom**: All endpoints return `"not found"`
 **Cause**: ConfigMap with models/routes not deployed
 **Solution**:
 ```bash
 kubectl -n api create configmap homelab-frontend-config \
  --from-file=config.yaml=k8s/configmap.yaml
 kubectl -n api rollout restart deployment/homelab-frontend
 ```
 ---
 ### 503 (Not Ready)
 **Symptom**: `/readyz` returns 503
 **Cause**: Configuration not loaded or JWKS fetch failed
 **Solution**:
 ```bash
 # Check logs
 kubectl -n api logs deployment/homelab-frontend
 # Check config
 kubectl -n api get configmap homelab-frontend-config
 ```
 ---
 ### Connection Refused
 **Symptom**: `Connection refused` or `Temporary failure in name resolution`
 **Cause**: 
 - Gateway not running
 - Wrong URL/hostname
 - Network issue
 **Solution**:
 ```bash
 # Verify gateway is running
 kubectl -n api get pods -l app=homelab-frontend
 # Check service
 kubectl -n api get svc homelab-frontend
 # Verify ingress
 kubectl -n api get ingress api
 ```
 ---
 ### Upstream Connection Errors
 **Symptom**: `502 Bad Gateway` or `connection refused to upstream`
 **Cause**: Model upstream service not reachable
 **Solution**:
 ```bash
 # Check upstreams are running
 kubectl -n llm-serving get pods
 # Verify addresses in ConfigMap
 kubectl -n api get configmap homelab-frontend-config -o yaml
 # Test connectivity from gateway pod
 kubectl -n api exec deployment/homelab-frontend -- \
  curl -s reasoning-predictor.llm-serving:80/healthz
 ```
 ---
 ### Streaming Doesn't Work
 **Symptom**: Chunks arrive all at once (buffered) instead of incrementally
 **Cause**: nginx buffering or client not using `-N` flag
 **Solution**:
 ```bash
 # Use -N flag
 curl -N https://api.riotpiao.com/v1/chat/completions ...
 # Verify nginx has buffering disabled
 # Should have: proxy-buffering: off in Ingress annotations
 ```
 ---
 ## Performance Testing
 ### Load Test (Simple)
 ```bash
 # Send 10 requests in parallel
 for i in {1..10}; do
  curl -X POST $GATEWAY/v1/chat/completions \
    -H 'Content-Type: application/json' \
    -d '{"model":"reasoning","messages":[{"role":"user","content":"Hi"}]}' &
 done
 wait
 echo "Completed 10 requests"
 ```
 ### Concurrency Test
 ```bash
 # Use Apache Bench (if installed)
 ab -n 100 -c 10 \
  -p request.json \
  -T application/json \
  $GATEWAY/v1/chat/completions
 # Create request.json:
 # {"model":"reasoning","messages":[{"role":"user","content":"test"}]}
 ```
 ### Latency Test
 ```bash
 # Measure response time
 curl -w "\nTotal time: %{time_total}s\n" \
  -X POST $GATEWAY/v1/chat/completions \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "reasoning",
    "messages": [{"role": "user", "content": "What is AI?"}]
  }' > /dev/null
 ```
 ---
 ## Integration Testing
 ### Test with Python
 ```bash
 pip install requests
 cat > test_api.py << 'EOF'
 import requests
 import json
 gateway = "https://api.riotpiao.com"
 # Test health
 r = requests.get(f"{gateway}/healthz")
 assert r.status_code == 200
 print("✓ Health check passed")
 # Test models
 r = requests.get(f"{gateway}/v1/models")
 assert r.status_code == 200
 models = [m['id'] for m in r.json()['data']]
 print(f"✓ Models: {models}")
 # Test chat
 r = requests.post(
    f"{gateway}/v1/chat/completions",
    json={"model": "reasoning", "messages": [{"role": "user", "content": "Hi"}]}
 )
 assert r.status_code == 200
 print("✓ Chat works")
 # Test unknown model error
 r = requests.post(
    f"{gateway}/v1/chat/completions",
    json={"model": "gpt-4", "messages": []}
 )
 assert r.status_code == 400
 assert "unknown" in r.json()['detail'].lower()
 print("✓ Unknown model error correct")
 # Test embeddings
 r = requests.post(
    f"{gateway}/v1/embeddings",
    json={"model": "nomic-ai/nomic-embed-text-v2-moe", "input": "test"}
 )
 assert r.status_code == 200
 print("✓ Embeddings work")
 # Test rerank
 r = requests.post(
    f"{gateway}/v1/rerank",
    json={"model": "BAAI/bge-reranker-base", "query": "test", "texts": ["a", "b"]}
 )
 assert r.status_code == 200
 print("✓ Reranking works")
 print("\n✅ All tests passed!")
 EOF
 python test_api.py
 ```
 ---
 ## Summary
 | Category | Tests | Expected |
 |----------|-------|----------|
 | Health | 2 | ✅ Both 200 |
 | Models | 1 | ✅ 5 models listed |
 | Chat | 8 | ✅ 6 success + 2 error |
 | Embeddings | 3 | ✅ 2 success + 1 error |
 | Rerank | 2 | ✅ 1 success + 1 error |
 | Streaming | 1 | ✅ Incremental chunks |
 | Tools | 1 | ✅ Tool calls present |
 | **TOTAL** | **18+** | **✅ ALL PASS** |
 Once all tests pass, the gateway is production-ready! 🚀
@@ -4,17 +4,47 @@ import (
 	"context"
 	"fmt"
 	"log"
 	"math"
 	"net/http"
 	"os"
 	"os/signal"
 	"runtime"
 	"strconv"
 	"strings"
 	"syscall"
-	"github.com/Riotpiaole/homelab-frontend/internal/config"
+	"forgejo.riotpiao.com/rock/homelab-frontend/internal/auth"
-	"github.com/Riotpiaole/homelab-frontend/internal/proxy"
+	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
-	"github.com/Riotpiaole/homelab-frontend/internal/server"
+	"forgejo.riotpiao.com/rock/homelab-frontend/internal/notification"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/observability"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/proxy"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/server"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/serviceadapter"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/temporal"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/tracing"
 )
 func main() {
 	// Size the Go scheduler to the container's CPU quota before any server
 	// goroutine starts.
 	configureGOMAXPROCS()
 	ctx := context.Background()
 	// Initialize OpenTelemetry tracing
 	tracingCfg := tracing.DefaultConfig()
 	shutdownTracer, err := tracing.Init(ctx, tracingCfg)
 	if err != nil {
 		log.Printf("warning: failed to initialize tracing: %v", err)
 	} else {
 		log.Printf("tracing initialized: service=%s endpoint=%s", tracingCfg.ServiceName, tracingCfg.OTLPEndpoint)
 		defer func() {
 			if err := shutdownTracer(ctx); err != nil {
 				log.Printf("error shutting down tracer: %v", err)
 			}
 		}()
 	}
 	// Load configuration
 	cfg, err := config.Load()
 	if err != nil {
@@ -34,6 +64,15 @@ func main() {
 	// Create the reverse proxy handler that routes requests based on configuration
 	upstreamHandler := proxy.New(cfg)
 	// Create the Temporal workflow handler
 	// Temporal server address can be configured via environment variable
 	temporalHostPort := os.Getenv("TEMPORAL_HOST_PORT")
 	if temporalHostPort == "" {
 		temporalHostPort = "localhost:7233"
 	}
 	log.Printf("Temporal server: %s", temporalHostPort)
 	temporalHandler := temporal.NewHandler(temporalHostPort)
 	// Create server with health checker
 	srv := server.New(cfg.ListenAddr, cfg.ShutdownTimeout, nil)
@@ -41,9 +80,83 @@ func main() {
 	healthChecker := server.NewHealthChecker(true, authEnabled)
 	srv.SetHealthChecker(healthChecker)
-	// Create router that handles health endpoints and passes others to upstream
+	// Create ServiceAdapter registry and dispatcher (phase 8)
-	router := server.NewRouter(healthChecker, upstreamHandler)
+	registry := serviceadapter.NewRegistry(nil)
-	srv.SetHandler(router)
+	
 	// Add workflow service adapter (uses Temporal handler for gRPC forwarding)
 	workflowSpec := serviceadapter.GetWorkflowSpec()
 	workflowAdapterHandler := serviceadapter.NewWorkflowAdapter(temporalHandler)
 	workflowAdapter := &serviceadapter.ServiceAdapter{
 		Namespace:   "temporal",
 		ServiceName: "workflow",
 		Handler:     workflowAdapterHandler,
 		Spec:        *workflowSpec,
 	}
 	_ = registry.Add(workflowAdapter)
 	// Add notification service adapter (internal handler, no upstream proxy)
 	notifHandler := notification.NewHandler()
 	notifAdapter := &serviceadapter.ServiceAdapter{
 		Namespace:   "notification",
 		ServiceName: "notification",
 		Handler:     notifHandler,
 		Spec: serviceadapter.Spec{
 			ServiceName: "notification",
 			Auth:        serviceadapter.Auth{Required: true},
 			Resources: []serviceadapter.Resource{
 				{Name: "send-email", Methods: []serviceadapter.Method{{Verb: "POST", UpstreamPath: "/send-email"}}},
 				{Name: "send-message", Methods: []serviceadapter.Method{{Verb: "POST", UpstreamPath: "/send-message"}}},
 				{Name: "list-messages", Methods: []serviceadapter.Method{{Verb: "GET", UpstreamPath: "/list-messages"}}},
 				{Name: "delete-message", Methods: []serviceadapter.Method{{Verb: "DELETE", UpstreamPath: "/delete-message"}}},
 				{Name: "delete-all-messages", Methods: []serviceadapter.Method{{Verb: "DELETE", UpstreamPath: "/delete-all-messages"}}},
 				{Name: "list-applications", Methods: []serviceadapter.Method{{Verb: "GET", UpstreamPath: "/list-applications"}}},
 				{Name: "create-application", Methods: []serviceadapter.Method{{Verb: "POST", UpstreamPath: "/create-application"}}},
 				{Name: "delete-application", Methods: []serviceadapter.Method{{Verb: "DELETE", UpstreamPath: "/delete-application"}}},
 			},
 		},
 	}
 	_ = registry.Add(notifAdapter)
 	// Add Poimen orchestrator adapter (typed REST for AI orchestrator frontend)
 	poimenAdapter := serviceadapter.NewPoimenAdapter(temporalHandler)
 	_ = registry.Add(poimenAdapter)
 	// Add memory service adapter (code-registered; config memory entry is skipped).
 	// Includes standing-context resource for CAG support (issue #44).
 	_ = registry.Add(serviceadapter.NewMemoryAdapter())
 	// Add sessions service adapter — REST CRUD bridged to poimen-memory ingest
 	// and poimen-graphql reads. Issue #50.
 	_ = registry.Add(serviceadapter.NewSessionAdapter())
 	// Add other adapters from config (skip if already registered in code)
 	for _, a := range cfg.Adapters {
 		if existing := registry.Get(a.ServiceName); existing != nil {
 			log.Printf("skip config adapter '%s': already registered with internal handler", a.ServiceName)
 			continue
 		}
 		_ = registry.Add(a)
 	}
 	log.Printf("%d service adapters loaded", registry.Count())
 	// Create shared JWT validator for X-Service auth enforcement
 	var jwtValidator *auth.Validator
 	if cfg.Auth.Enabled && cfg.Auth.JWKSURL != "" {
 		jwtValidator = auth.NewValidator(cfg.Auth.Issuer, cfg.Auth.Audience, cfg.Auth.JWKSURL)
 	}
 	dispatcher := serviceadapter.NewDispatcher(registry, jwtValidator)
 	// Wire workflow adapter to temporal handler for proper request forwarding
 	// workflowAdapterHandler (above) handles JSON-to-gRPC translation for workflow service
 	// Create router that handles health endpoints, X-Service (ServiceAdapter) routing,
 	// temporal endpoints, and passes others to upstream handler
 	router := server.NewRouter(healthChecker, dispatcher, temporalHandler, upstreamHandler)
 	router.SetMetricsHandler(observability.NewMetricsHandler(observability.Global()))
 	// Wrap router with tracing middleware
 	tracedRouter := tracing.Middleware(router)
 	srv.SetHandler(tracedRouter)
 	// Set up signal handling
 	sigChan := make(chan os.Signal, 1)
@@ -72,3 +185,53 @@ func main() {
 	log.Printf("gateway shutdown complete")
 	os.Exit(0)
 }
 // configureGOMAXPROCS sets GOMAXPROCS from the cgroup CPU quota so the runtime
 // sizes its scheduler to the container limit rather than the host CPU count.
 // The default is left alone when no quota is configured.
 func configureGOMAXPROCS() {
 	quota, period := readCPUQuota()
 	if quota <= 0 || period <= 0 {
 		return
 	}
 	n := int(math.Ceil(float64(quota) / float64(period)))
 	if n < 1 {
 		n = 1
 	}
 	runtime.GOMAXPROCS(n)
 	log.Printf("GOMAXPROCS set to %d (cgroup cpu quota %d/%d)", n, quota, period)
 }
 // readCPUQuota returns the CPU quota and period from cgroup v2, falling back to
 // cgroup v1. A quota of 0 means no limit.
 func readCPUQuota() (int64, int64) {
 	// cgroup v2: "<quota> <period>" or "max <period>".
 	if data, err := os.ReadFile("/sys/fs/cgroup/cpu.max"); err == nil {
 		fields := strings.Fields(string(data))
 		if len(fields) >= 2 {
 			period, perr := strconv.ParseInt(fields[1], 10, 64)
 			if perr == nil && period > 0 {
 				if fields[0] == "max" {
 					return 0, period
 				}
 				if quota, qerr := strconv.ParseInt(fields[0], 10, 64); qerr == nil {
 					return quota, period
 				}
 			}
 		}
 	}
 	// cgroup v1: cpu.cfs_quota_us is -1 when unlimited.
 	period := int64(100000)
 	if data, err := os.ReadFile("/sys/fs/cgroup/cpu/cpu.cfs_period_us"); err == nil {
 		if v, perr := strconv.ParseInt(strings.TrimSpace(string(data)), 10, 64); perr == nil && v > 0 {
 			period = v
 		}
 	}
 	if data, err := os.ReadFile("/sys/fs/cgroup/cpu/cpu.cfs_quota_us"); err == nil {
 		if v, qerr := strconv.ParseInt(strings.TrimSpace(string(data)), 10, 64); qerr == nil {
 			return v, period
 		}
 	}
 	return 0, 0
 }
@@ -0,0 +1,88 @@
 package main
 import (
 	"context"
 	"flag"
 	"fmt"
 	"log"
 	"time"
 	"go.temporal.io/sdk/client"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/workflow"
 )
 func main() {
 	hostPort := flag.String("host", "temporal.temporal:7233", "Temporal server host:port")
 	namespace := flag.String("namespace", "production", "Temporal namespace")
 	taskQueue := flag.String("queue", "worker-production", "Task queue")
 	workflowType := flag.String("workflow", "HelloWorldWorkflow", "Workflow type")
 	workflowID := flag.String("id", "", "Workflow ID (auto-generated if not set)")
 	flag.Parse()
 	// Auto-generate ID
 	if *workflowID == "" {
 		*workflowID = fmt.Sprintf("test-%s-%d", *workflowType, time.Now().Unix())
 	}
 	log.Printf("Connecting to Temporal at %s (namespace: %s)", *hostPort, *namespace)
 	// Connect to Temporal
 	c, err := client.Dial(client.Options{
 		HostPort:  *hostPort,
 		Namespace: *namespace,
 	})
 	if err != nil {
 		log.Fatalf("Failed to connect: %v", err)
 	}
 	defer c.Close()
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
 	// Start workflow
 	log.Printf("Starting %s (ID: %s)", *workflowType, *workflowID)
 	var run client.WorkflowRun
 	switch *workflowType {
 	case "HelloWorldWorkflow":
 		run, err = c.ExecuteWorkflow(ctx, client.StartWorkflowOptions{
 			ID:        *workflowID,
 			TaskQueue: *taskQueue,
 		}, workflow.HelloWorldWorkflow, "World")
 	case "GreeterWorkflow":
 		run, err = c.ExecuteWorkflow(ctx, client.StartWorkflowOptions{
 			ID:        *workflowID,
 			TaskQueue: *taskQueue,
 		}, workflow.GreeterWorkflow, "Alice")
 	case "ProcessOrderWorkflow":
 		run, err = c.ExecuteWorkflow(ctx, client.StartWorkflowOptions{
 			ID:        *workflowID,
 			TaskQueue: *taskQueue,
 		}, workflow.ProcessOrderWorkflow, "ORDER-12345")
 	default:
 		log.Fatalf("Unknown workflow type: %s", *workflowType)
 	}
 	if err != nil {
 		log.Fatalf("Failed to start workflow: %v", err)
 	}
 	log.Printf("✓ Workflow submitted")
 	log.Printf("  Run ID:       %s", run.GetRunID())
 	log.Printf("  Workflow ID:  %s", *workflowID)
 	log.Printf("  Watch at:     http://localhost:8080/namespaces/%s/workflows/%s", *namespace, *workflowID)
 	// Try to get result
 	ctx2, cancel2 := context.WithTimeout(context.Background(), 10*time.Second)
 	defer cancel2()
 	var result string
 	if err := run.Get(ctx2, &result); err != nil {
 		log.Printf("⏳ Workflow executing (or error): %v", err)
 	} else {
 		log.Printf("✓ Result: %s", result)
 	}
 }
@@ -0,0 +1,63 @@
 package main
 import (
 	"flag"
 	"log"
 	"os"
 	"os/signal"
 	"syscall"
 	"go.temporal.io/sdk/client"
 	"go.temporal.io/sdk/worker"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/workflow"
 )
 func main() {
 	hostPort := flag.String("host", "temporal.temporal:7233", "Temporal server host:port")
 	namespace := flag.String("namespace", "production", "Temporal namespace")
 	taskQueue := flag.String("queue", "worker-production", "Task queue")
 	flag.Parse()
 	// Connect to Temporal server
 	c, err := client.Dial(client.Options{
 		HostPort:  *hostPort,
 		Namespace: *namespace,
 	})
 	if err != nil {
 		log.Fatalf("Failed to connect to Temporal: %v", err)
 	}
 	defer c.Close()
 	log.Printf("Connected to Temporal at %s (namespace: %s)", *hostPort, *namespace)
 	// Create worker
 	w := worker.New(c, *taskQueue, worker.Options{})
 	// Register workflows
 	w.RegisterWorkflow(workflow.HelloWorldWorkflow)
 	w.RegisterWorkflow(workflow.GreeterWorkflow)
 	w.RegisterWorkflow(workflow.ProcessOrderWorkflow)
 	// Register activities
 	w.RegisterActivity(workflow.GreetActivity)
 	w.RegisterActivity(workflow.ValidateOrderActivity)
 	w.RegisterActivity(workflow.ProcessPaymentActivity)
 	w.RegisterActivity(workflow.NotifyCustomerActivity)
 	log.Printf("Starting worker on task queue: %s", *taskQueue)
 	// Handle graceful shutdown
 	sigChan := make(chan os.Signal, 1)
 	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
 	go func() {
 		<-sigChan
 		log.Println("Shutting down worker...")
 		w.Stop()
 	}()
 	// Run worker (blocks)
 	if err := w.Run(worker.InterruptCh()); err != nil {
 		log.Fatalf("Worker error: %v", err)
 	}
 }
@@ -1,324 +0,0 @@
 # API — LLM surfaces
 Two protocol dialects over the same models and the same slot controller.
 | Prefix | Dialect | Endpoint | Client |
 |---|---|---|---|
 | `/v1` | OpenAI-compatible | `POST /v1/chat/completions` | pi, OpenAI SDKs |
 | `/llm` | Anthropic Messages | `POST /llm/v1/messages` | riotpiao frontend (first-party) |
 Status marks below:
 **[LIVE]** verified against the running cluster on 2026-08-19.
 **[SPEC]** the contract this gateway must implement; not built yet.
 ---
 ## Models
 | `model` value | Upstream | Engine | Context | Notes |
 |---|---|---|---|---|
 | `reasoning` | `reasoning-predictor.llm-serving:80` | vLLM, DeepSeek-R1-Distill-Qwen-32B | 16384 | emits `reasoning_content`; 8 sequence slots total |
 | `ornith:35b` | `ornith-predictor.llm-serving:80` | Ollama | 131072 | reliable tool calling |
 | `qwen2.5:3b-instruct` | `ornith-predictor.llm-serving:80` | Ollama | 32768 | same pods as ornith |
 | `nomic-ai/nomic-embed-text-v2-moe` | `embeddings-predictor.llm-serving:80` | TEI | — | embeddings only |
 | `BAAI/bge-reranker-base` | `reranker-predictor.llm-serving:80` | TEI | — | rerank only |
 `reasoning` runs 2 replicas x `--max-num-seqs=4`. Those **8 slots are the scarcest resource in the cluster** and are shared across both dialects.
 ---
 ## Authentication [SPEC]
 Ships behind a flag, default off. The model API is unauthenticated today.
 ```
 Authorization: Bearer <authentik-jwt>
 ```
 ### Decided — Bearer on both surfaces
 `Authorization: Bearer <jwt>` is the only accepted credential, on `/v1` and `/llm` alike. One auth path, consistent with G5, validated against Authentik via JWKS.
 **Known divergence from Anthropic:** the real Anthropic API authenticates with `x-api-key` and requires `anthropic-version: 2023-06-01`. A stock Anthropic SDK pointed at `/llm` will send `x-api-key` and get a 401.
 This is accepted, not overlooked. The `/llm` client is the first-party riotpiao frontend, which sends whatever we tell it to. If a real Anthropic SDK ever needs to reach this gateway, accepting `x-api-key` as a second credential source is an additive change — a small branch in one middleware, not a redesign.
 `anthropic-version` is accepted and ignored if present, and never required.
 The 401 for an `x-api-key`-only request must name the problem — say that Bearer is required — rather than returning a bare 401. The Kong retirement was caused by exactly this failure mode: a gateway that rejected the header clients actually send, without saying why.
 ---
 ## OpenAI dialect — `POST /v1/chat/completions`
 ### Request [SPEC]
 ```json
 {
  "model": "reasoning",
  "messages": [{"role": "user", "content": "Why is wave 4 empty?"}],
  "max_tokens": 2000,
  "temperature": 0.7,
  "stream": false
 }
 ```
 `model` is required and selects the upstream. The body is forwarded byte-identical — the gateway reads `model`, it does not rewrite it.
 ### Response, non-streaming [LIVE]
 Captured verbatim from `reasoning` on 2026-08-19, abridged:
 ```json
 {
  "id": "chatcmpl-f17bd2fe22e4276d24e9438e40e89cea",
  "object": "chat.completion",
  "created": 1787172340,
  "model": "reasoning",
  "choices": [{
    "index": 0,
    "message": {
      "role": "assistant",
      "content": "\n\nTo find the current weather in Toronto...",
      "reasoning_content": "Okay, so I need to figure out...",
      "tool_calls": []
    },
    "finish_reason": "length"
  }],
  "usage": {"prompt_tokens": 16, "completion_tokens": 300, "total_tokens": 316}
 }
 ```
 `reasoning_content` is a **sibling of** `content`, not nested in it. This is a vLLM extension produced by `--reasoning-parser=deepseek_r1`; it is not part of the OpenAI spec. Pass it through untouched.
 ### The two engines disagree on the field name [LIVE]
 Verified 2026-08-19 by calling both:
 | Upstream | Engine | Reasoning field |
 |---|---|---|
 | `reasoning-predictor` | vLLM | `reasoning_content` |
 | `ornith-predictor` | Ollama | `reasoning` |
 Neither is in the OpenAI spec, so neither is wrong — they are two vendor extensions that
 happen to mean the same thing. The gateway must recognise **both** when mapping to the
 Anthropic `thinking` block, or `ornith:35b` responses will silently lose their reasoning
 on the `/llm` surface.
 Do not normalise them on the `/v1` surface. That surface passes bodies through
 untouched, and a client asking for `ornith:35b` should get exactly what Ollama sent.
 Normalisation belongs in the canonical request model (task 2.9), which is the layer that
 exists to absorb precisely this kind of upstream difference.
 ### Response, streaming [SPEC]
 ```
 data: {"id":"chatcmpl-...","object":"chat.completion.chunk","choices":[{"index":0,"delta":{"reasoning_content":"Okay"},"finish_reason":null}]}
 data: {"id":"chatcmpl-...","object":"chat.completion.chunk","choices":[{"index":0,"delta":{"content":"Wave"},"finish_reason":null}]}
 data: {"id":"chatcmpl-...","object":"chat.completion.chunk","choices":[{"index":0,"delta":{},"finish_reason":"stop"}]}
 data: [DONE]
 ```
 Data-only frames, no `event:` lines. Terminated by the literal `data: [DONE]`.
 ### Legacy aliases [LIVE, being retired]
 `POST /v1/{reasoning,ornith,qwen}/chat/completions` force `model` to the corresponding value regardless of the body. They exist only because Kong could not dispatch on the body. Removed once callers migrate.
 ### `GET /v1/models` [SPEC]
 ```json
 {"object":"list","data":[{"id":"reasoning","object":"model","owned_by":"homelab","created":0}]}
 ```
 Derived from the registry, never hardcoded.
 ### Errors [SPEC]
 RFC 9457 `application/problem+json`:
 ```json
 {
  "type": "https://riotpiao.com/errors/unknown-model",
  "title": "Unknown model",
  "status": 400,
  "detail": "\"gpt-4\" is not available",
  "validModels": ["reasoning", "ornith:35b", "qwen2.5:3b-instruct"]
 }
 ```
 ---
 ## Anthropic dialect — `POST /llm/v1/messages` [SPEC]
 Path note: the Anthropic SDK appends `/v1/messages` to its base URL, so a base URL of `https://api.riotpiao.com/llm` produces exactly this path.
 ### Request
 ```json
 {
  "model": "reasoning",
  "max_tokens": 2000,
  "system": "You are a cluster assistant.",
  "messages": [
    {"role": "user", "content": "Why is wave 4 empty?"}
  ],
  "stream": true
 }
 ```
 Differences from the OpenAI dialect that the translator must handle:
 | Concern | OpenAI | Anthropic |
 |---|---|---|
 | system prompt | `messages[0].role = "system"` | top-level `system` field |
 | `max_tokens` | optional | **required** |
 | content | string | string *or* block array |
 | roles | system/user/assistant/tool | user/assistant only |
 | stop | `stop` | `stop_sequences` |
 `max_tokens` being required is a real divergence — the gateway must either reject its absence with a clear error or apply a documented default. Pick one and state it; do not silently default.
 ### Response, non-streaming
 ```json
 {
  "id": "msg_01ABC",
  "type": "message",
  "role": "assistant",
  "model": "reasoning",
  "content": [
    {"type": "thinking", "thinking": "Waves are sort keys, not a sequence..."},
    {"type": "text", "text": "Wave 4 is empty. Waves are sort keys..."}
  ],
  "stop_reason": "end_turn",
  "stop_sequence": null,
  "usage": {"input_tokens": 16, "output_tokens": 300}
 }
 ```
 Field mapping from the upstream OpenAI response:
 | Upstream | Anthropic |
 |---|---|
 | `choices[0].message.reasoning_content` | `content[]` block `{"type":"thinking","thinking":...}` |
 | `choices[0].message.content` | `content[]` block `{"type":"text","text":...}` |
 | `finish_reason: "stop"` | `stop_reason: "end_turn"` |
 | `finish_reason: "length"` | `stop_reason: "max_tokens"` |
 | `usage.prompt_tokens` | `usage.input_tokens` |
 | `usage.completion_tokens` | `usage.output_tokens` |
 The thinking block precedes the text block.
 ### Response, streaming
 Anthropic SSE uses **named events with content-block indices**, unlike OpenAI's flat frames. Verified event sequence:
 ```
 event: message_start
 data: {"type":"message_start","message":{"id":"msg_01ABC","type":"message","role":"assistant","model":"reasoning","content":[],"usage":{"input_tokens":16,"output_tokens":0}}}
 event: content_block_start
 data: {"type":"content_block_start","index":0,"content_block":{"type":"thinking","thinking":""}}
 event: content_block_delta
 data: {"type":"content_block_delta","index":0,"delta":{"type":"thinking_delta","thinking":"Waves are sort keys"}}
 event: content_block_stop
 data: {"type":"content_block_stop","index":0}
 event: content_block_start
 data: {"type":"content_block_start","index":1,"content_block":{"type":"text","text":""}}
 event: content_block_delta
 data: {"type":"content_block_delta","index":1,"delta":{"type":"text_delta","text":"Wave 4 is empty."}}
 event: content_block_stop
 data: {"type":"content_block_stop","index":1}
 event: message_delta
 data: {"type":"message_delta","delta":{"stop_reason":"end_turn","stop_sequence":null},"usage":{"output_tokens":300}}
 event: message_stop
 data: {"type":"message_stop"}
 ```
 Three details that are easy to get wrong:
 - In `message_delta`, `usage` is a **sibling of** `delta`, not inside it.
 - The delta field name matches the delta type: `thinking_delta` carries `.thinking`, `text_delta` carries `.text`.
 - Block index 0 is thinking, index 1 is text. **You only learn reasoning has ended when `content` first appears in an upstream chunk**, so the thinking block must be closed before the text block opens. If a response has no `reasoning_content` at all, the text block is index 0 and no thinking block is emitted.
 ### Queue position — non-standard extension
 Anthropic's event set has no way to say "you are queued", because the stream implicitly begins after a slot is acquired. With only 8 slots, queueing is normal here.
 Emitted **before** `message_start`:
 ```
 event: queue
 data: {"type":"queue","position":3}
 ```
 This is deliberately outside the Anthropic spec. It is safe only because the client is first-party; a strict Anthropic client would ignore the unknown event and show nothing while queued.
 ### Errors
 Anthropic error shape, **not** RFC 9457 — the same rejection renders differently depending on which surface received it:
 ```json
 {"type":"error","error":{"type":"invalid_request_error","message":"Unknown model \"gpt-4\". Available: reasoning, ornith:35b, qwen2.5:3b-instruct"}}
 ```
 | Condition | HTTP | `error.type` |
 |---|---|---|
 | unknown or missing model | 400 | `invalid_request_error` |
 | `max_tokens` absent (if required) | 400 | `invalid_request_error` |
 | malformed JSON | 400 | `invalid_request_error` |
 | unsupported feature requested | 400 | `invalid_request_error` |
 | not authenticated | 401 | `authentication_error` |
 | budget exhausted or queue full | 429 | `rate_limit_error` |
 | upstream failure | 502 | `api_error` |
 ### Deliberately not implemented
 Each returns 400 naming the unsupported feature — never a silent partial implementation:
 tool use and `tool_result` turns, image content blocks, prompt-caching headers, the batch API, multi-block user content, `thinking.budget_tokens` configuration.
 The target client is the riotpiao frontend. Widening scope is a code change with a test, not an accident.
 ---
 ## Shared behaviour, both dialects
 **One slot controller, keyed by upstream.** A `/v1` request and a `/llm` request contend for the same 8 `reasoning` slots and the same queue, in arrival order. Per-dialect semaphores would each believe they were within budget while together exceeding the physical limit.
 **Streaming is unbuffered** and a client disconnect cancels the upstream immediately. An orphaned generation holds a slot until it completes on its own, which for a 32B model on a Volta GPU can run to minutes.
 **Timeouts** [LIVE]: chat routes are connect 10s / read 1h / write 1h. The hour is deliberate — a 32B model on this hardware routinely exceeds 60s. Any shorter application cap is enforced in gateway logic, never by shortening the proxy timeout.
 **Tool calling** [LIVE]: `reasoning` honours an explicit `tool_choice` but returns `tool_calls: []` under `tool_choice: "auto"` — it reasons about the tool in prose instead. `ornith:35b` returns `finish_reason: "tool_calls"` correctly under `auto`. This is a model property; the gateway does not compensate for it.
 ---
 ## Examples
 ```bash
 # OpenAI dialect
 curl -s https://api.riotpiao.com/v1/chat/completions \
  -H 'content-type: application/json' \
  -d '{"model":"reasoning","messages":[{"role":"user","content":"Why is wave 4 empty?"}],"max_tokens":500}'
 # Anthropic dialect, streaming
 curl -N -s https://api.riotpiao.com/llm/v1/messages \
  -H 'content-type: application/json' \
  -d '{"model":"reasoning","max_tokens":500,"stream":true,
       "messages":[{"role":"user","content":"Why is wave 4 empty?"}]}'
 # model list
 curl -s https://api.riotpiao.com/v1/models
 ```
@@ -1,263 +0,0 @@
 # API — queue surface (`/sqs/*`)
 Fronts the Kafka Management Service (`kmsvc`) in namespace `sqs`. SQS-shaped
 message-plane API over Kafka.
 Status marks:
 **[LIVE]** verified against the running cluster and the committed proto on 2026-08-19.
 **[SPEC]** the contract this gateway must implement; not built yet.
 Source of truth for shapes:
 `~/workplace/kmsvc-proto/proto/kafkamgmt/v1/queue_service.proto`.
 ---
 ## The important finding: a REST surface already exists [LIVE]
 **Do not build gRPC-to-JSON transcoding.** `kmsvc-manage` already mounts grpc-gateway:
 ```go
 mux := runtime.NewServeMux()
 kafkamgmtv1.RegisterQueueServiceHandlerServer(ctx, mux, svc)
 ```
 The upstream serves plain REST/JSON on **:8080** and plain gRPC on **:9090**. Neither
 gRPC-Web nor server reflection is enabled.
 So `/sqs/*` is a **path-stripping reverse proxy plus authentication**, not a protocol
 translator. That makes it dramatically cheaper than the LLM surface.
 ```
 api.riotpiao.com/sqs/v1/queues/{q}/messages
        |  strip /sqs, authenticate
        v
 management-service.sqs.svc.cluster.local:8080/v1/queues/{q}/messages
 ```
 Upstream: Deployment `management-service`, 3 replicas, HPA 3-9, Service ClusterIP
 `10.98.3.138`, ports `8080` (http) and `9090` (grpc).
 ---
 ## Endpoints [LIVE — HTTP annotations from the proto]
 Six operations. All unary. No streaming, no subscribe.
 | Method | Path (after `/sqs` strip) | RPC |
 |---|---|---|
 | POST | `/v1/queues/{queue_name}/messages` | `SendMessage` |
 | POST | `/v1/queues/{queue_name}/messages:batch` | `SendMessageBatch` |
 | GET | `/v1/queues/{queue_name}/messages` | `ReceiveMessage` |
 | DELETE | `/v1/queues/{queue_name}/messages/{receipt_handle}` | `DeleteMessage` |
 | POST | `/v1/queues/{queue_name}/messages:batchDelete` | `DeleteMessageBatch` |
 | PATCH | `/v1/queues/{queue_name}/messages/{receipt_handle}` | `ChangeMessageVisibility` |
 ---
 ## Two wire-format traps [LIVE]
 Both follow from grpc-gateway defaults, and both will surprise anyone who reads only
 the proto.
 **1. `bytes` fields are base64 in JSON.** `SendMessageRequest.message_body` and
 `Message.body` are proto `bytes`. The JSONPB marshaler encodes them as base64 strings.
 Sending raw text will not do what you expect.
 **2. Field names are lowerCamelCase.** `cmd/server/main.go` calls bare
 `runtime.NewServeMux()` with no marshaler options, so `OrigName` is false. The wire uses
 `messageBody`, `receiptHandle`, `maxNumberOfMessages` — not the snake_case names in the
 proto.
 Document both prominently or every first-time caller loses an hour.
 ---
 ## Message shapes [LIVE — from the proto]
 ### Send
 ```
 POST /sqs/v1/queues/agent-worker-queue/messages
 {
  "messageBody": "aGVsbG8gd29ybGQ=",          // base64 of "hello world"
  "messageAttributes": {"values": {"k": "v"}},
  "messageGroupId": "",                        // FIFO only
  "messageDeduplicationId": "",                // FIFO only
  "delaySeconds": 0                            // 0-900
 }
 -> {"messageId": "...", "sequenceNumber": ""}  // sequenceNumber FIFO only
 ```
 ### Receive — long poll
 ```
 GET /sqs/v1/queues/agent-worker-queue/messages
      ?maxNumberOfMessages=10      // <= 10
      &waitTimeSeconds=20          // 0-20
      &visibilityTimeoutSeconds=30 // optional override
 -> {"messages": [{
     "messageId": "...",
     "receiptHandle": "...",
     "body": "aGVsbG8gd29ybGQ=",
     "attributes": {"values": {}},
     "receiveCount": 1,
     "messageGroupId": "",
     "enqueuedAt": "2026-08-19T16:29:07Z"
   }]}
 ```
 ### Delete — the ack
 ```
 DELETE /sqs/v1/queues/agent-worker-queue/messages/{receiptHandle}
 -> {}
 ```
 ### Change visibility
 ```
 PATCH /sqs/v1/queues/agent-worker-queue/messages/{receiptHandle}
 {"visibilityTimeoutSeconds": 60}   // 0-43200
 -> {}
 ```
 ### Batch
 Both batch calls take `entries[]` with a caller-assigned `id`, and return partial
 success:
 ```json
 {"successful": [{"id": "1", "messageId": "..."}],
 "failed":     [{"id": "2", "error": "..."}]}
 ```
 A batch call can return 200 with entries in `failed`. Callers must inspect the body,
 not just the status.
 ### Limits [LIVE — from the SDK]
 `MaxMessageBodyBytes = 262144` (256 KiB), `MaxReceiveMessages = 10`,
 `MaxWaitTimeSeconds = 20`.
 ---
 ## Semantics
 At-least-once, SQS-style. Receive leases a message for the visibility timeout; the
 caller must `DeleteMessage` to acknowledge. An un-deleted message reappears after the
 timeout and `receiveCount` increments. After `maxReceiveCount` (default 5) it goes to
 the DLQ if one is configured.
 **Long-polling matters for the gateway.** `waitTimeSeconds` up to 20 means a `GET` can
 legitimately hold open for 20 seconds returning nothing. Read timeouts must exceed that
 comfortably, and a client disconnect must cancel upstream — the same requirement as the
 LLM surface, for the same reason.
 ---
 ## Error mapping [SPEC]
 The SDK maps gRPC codes to sentinel errors; grpc-gateway maps them to HTTP. Use this as
 the gateway's status contract:
 | gRPC code | HTTP | SDK sentinel |
 |---|---|---|
 | `NotFound` | 404 | `ErrQueueNotFound` |
 | `AlreadyExists` | 409 | `ErrAlreadyExists` |
 | `InvalidArgument` | 400 | `ErrInvalidArgument` |
 | `Unauthenticated` | 401 | `ErrUnauthenticated` |
 | `ResourceExhausted` | 429 | `ErrMessageTooLarge` |
 Upstream errors arrive in the grpc-gateway envelope
 `{"code": 5, "message": "Not Found", "details": []}`. Decide deliberately whether
 `/sqs/*` passes that through or re-renders it as RFC 9457 to match `/v1/*`.
 Recommendation: **pass through**, so the gateway does not become a second, subtly
 different error vocabulary for the same upstream.
 ---
 ## Queue lifecycle is NOT in this API [LIVE]
 There is no `CreateQueue`, `DeleteQueue`, or `ListQueues` RPC. The proto says so
 explicitly:
 ```proto
 // Queue lifecycle (create/delete/configure) is managed via the Queue CRD,
 // not this service
 ```
 Queues are Kubernetes resources — `queues.kmsvc.io/v1`, namespaced. `kmsvc-cli`'s
 `create-queue` and `delete-queue` talk to the Kubernetes API, not to kmsvc.
 **This is a hard boundary for the gateway.** Exposing queue creation over `/sqs/*` would
 require the gateway to hold Kubernetes write credentials, which violates **G2**. Do not
 add it. If declarative queue management ever needs a public surface, it belongs behind a
 separate component with its own RBAC — not in the public edge process.
 Queue spec fields, for reference when reading a queue's configuration:
 `fifoQueue`, `isDLQ`, `deadLetterTargetQueue`, `delaySeconds` (0-900),
 `maxReceiveCount` (default 5), `messageRetentionPeriodSeconds` (default 345600),
 `visibilityTimeoutSeconds` (default 30), `minShards`, `maxShards` (default 8),
 `partitionsPerShard` (default 6), `shardSplitThresholdBytesPerSec`,
 `shardSplitCooldownSeconds`.
 Kafka topics are named `kmsvc.{queue}.shard-{id}` and are created by `queue-operator`
 directly via the Kafka Admin API — there are no `KafkaTopic` CRs.
 Currently one queue exists: `agent-worker-queue` in namespace `sqs`, phase `Ready`,
 1 shard.
 ---
 ## Authentication [SPEC]
 `Authorization: Bearer <jwt>`, same as every other gateway surface.
 **The upstream enforces nothing.** `kmsvc`'s auth interceptor exists but is never wired,
 and the REST surface is mounted with the in-process grpc-gateway variant that bypasses
 gRPC interceptors regardless. Both `:8080` and `:9090` are currently open, and
 `kmsvc.riotpiao.com` is publicly routed.
 The gateway is therefore the only authentication boundary for this surface. See
 [KNOWN-ISSUES.md](KNOWN-ISSUES.md) §2.
 ---
 ## Out of scope
 - **Workflow start.** Nothing in kmsvc starts a Temporal workflow — no such RPC exists,
  and grep for `ExecuteWorkflow`/`StartWorkflow` across `kmsvc-manage`, `kmsvc-sdk` and
  `kmsvc-cli` returns nothing. A caller dials `temporal-frontend.temporal.svc:7233`
  with a Temporal SDK directly. A `/workflow/*` surface is net-new code, not a proxy
  route — see [task 7.3](../tasks/7.3-workflow-prefix.md) and KNOWN-ISSUES.md §1.
 - **DLQ operations.** `kmsvc-cli`'s `dlq peek` and `dlq redrive` are client-side
  compositions of the six RPCs, not server operations. Redrive is a non-atomic
  Receive-Send-Delete. If `/sqs/*` should offer redrive, that is new logic with real
  failure modes, not a proxied call.
 - **Kafka direct access.** No external listener exists; the bootstrap
  `kmsvc-kafka-bootstrap.sqs.svc.cluster.local:9092` is cluster-internal only. The
  gateway proxies kmsvc, never Kafka.
 ---
 ## Examples
 ```bash
 Q=agent-worker-queue
 # send (body must be base64)
 curl -s -X POST https://api.riotpiao.com/sqs/v1/queues/$Q/messages \
  -H 'content-type: application/json' \
  -d "{\"messageBody\":\"$(printf 'hello world' | base64)\"}"
 # receive, long poll 20s
 curl -s "https://api.riotpiao.com/sqs/v1/queues/$Q/messages?maxNumberOfMessages=10&waitTimeSeconds=20"
 # acknowledge
 curl -s -X DELETE https://api.riotpiao.com/sqs/v1/queues/$Q/messages/$RECEIPT
 # extend the lease
 curl -s -X PATCH https://api.riotpiao.com/sqs/v1/queues/$Q/messages/$RECEIPT \
  -H 'content-type: application/json' -d '{"visibilityTimeoutSeconds":60}'
 ```
@@ -1,118 +0,0 @@
 # Known cluster issues
 Pre-existing problems found while specifying this gateway. None are caused by this
 repo, and none block phases 0-6. Recorded so they are not rediscovered or mistaken
 for new breakage.
 Verified 2026-08-19 against context `admin@homelab-cluster`.
 ---
 ## 1. TemporalWorker CRD is stale — queue-operator reconcile fails every ~17 min
 **Status:** open, deliberately deferred. Affects [task 7.3](../tasks/7.3-workflow-prefix.md).
 The live `temporalworkers.kmsvc.io` CRD and the one in
 `~/workplace/kmsvc-manage/config/crd/kmsvc.io_temporalworkers.yaml` share exactly one
 field — `namespace`.
 | | spec properties |
 |---|---|
 | live CRD | `activityTypes`, `concurrency`, `namespace`, `taskQueue`, `workflowTypes` |
 | repo CRD | `affinity`, `image`, `imagePullPolicy`, `namespace`, `nodeSelector`, `replicas`, `resources`, `tolerations` |
 The live schema has no `image` field, so the API server **prunes** `image` from the CR
 that `queue-operator` writes. `TemporalWorker/worker-production` ends up as
 `spec: {namespace: production}`, and the operator then fails to build a Deployment
 from it. The live CRD also lacks a status subresource, producing a second error.
 Observed on a loop, most recently 21:25:39Z:
 ```
 failed to create or update deployment ... error: "Deployment.apps \"worker-production\"
  is invalid: spec.template.spec.containers[0].image: Required value"
 Reconciler error ... "update status failed: temporalworkers.kmsvc.io
  \"worker-production\" not found"
 ```
 **Impact is narrower than it looks.** No worker Deployment has ever existed under this
 CRD, so nothing that was working has stopped. Temporal namespace `production` is
 registered and healthy; there is simply no worker polling it. The practical cost is log
 noise, not lost work. That is why this is deferred rather than treated as an incident.
 **Neither object is under GitOps.** The CRD and the `Queue/agent-worker-queue` CR both
 carry only `kubectl.kubernetes.io/last-applied-configuration` — no
 `argocd.argoproj.io/instance`, no tracking-id — and the Queue does not appear anywhere
 in the homelab repo. They were hand-applied and predate GitOps coverage.
 **Fix, when it is worth doing:**
 1. Bring `temporalworkers.kmsvc.io` and the Queue CR into the homelab GitOps repo.
 2. Apply the current CRD from `kmsvc-manage/config/crd`, which restores `image` and the
   status subresource.
 3. Ensure the operator sets `spec.image` on the CR it creates.
 Do not hand-apply the CRD as a one-off. That reproduces exactly the situation that
 caused this — a cluster object with no source of truth.
 **To silence the loop without fixing it:** remove the `temporal.io/namespace: production`
 label from `Queue/agent-worker-queue` in namespace `sqs`. The operator returns early when
 the label is absent. Reversible by re-adding it.
 ---
 ## 2. `kmsvc.riotpiao.com` is unauthenticated
 **Status:** open. Relevant to [task 7.2](../tasks/7.2-sqs-prefix.md).
 `kmsvc-manage` has an auth interceptor at `internal/api/interceptors/auth.go`, but it is
 never wired: `cmd/server/main.go` constructs a bare `grpc.NewServer()` with no
 interceptor options. The live ConfigMap confirms it — `KMSVC_AUTHENTIK_ISSUER_URL` and
 `KMSVC_AUTHENTIK_AUDIENCE` are both empty strings.
 Both the REST surface (8080) and the gRPC surface (9090) are open.
 There is a second, subtler problem. The REST surface is mounted with
 `RegisterQueueServiceHandlerServer`, the **in-process** grpc-gateway variant that calls
 the service implementation directly. It bypasses gRPC interceptors entirely. So even
 once the interceptor is wired, it would authenticate gRPC callers only — the file's own
 doc comment claiming it covers both REST and gRPC is wrong for this wiring.
 Consequence for this gateway: `/sqs/*` must own authentication itself. Do not assume the
 upstream will enforce anything.
 ---
 ## 3. `kmsvc-redis-master.sqs:6379` has no authentication
 `ALLOW_EMPTY_PASSWORD=yes`, TLS off, Bitnami chart with `auth.enabled=false`, no password
 secret in the namespace. Anything with network reach has full unauthenticated read/write.
 A NetworkPolicy is the only control. Relevant to [task 6.2](../tasks/6.2-kubernetes-manifests.md).
 ---
 ## 4. `macos-bluebubbles` pod will never schedule
 `sms` Argo Application is `Synced`/`Degraded`. The pod targets a macOS node that is not
 in the cluster: `0/4 nodes are available: 4 node(s) didn't match Pod's node
 affinity/selector`, roughly 1080 failed attempts over 3d18h.
 Not transient. Needs either that node or removal of the Application. Unrelated to this
 gateway; listed so the Degraded status is not mistaken for something new.
 ---
 ## 5. Documentation that does not match reality
 - `kmsvc-manage/TEMPORAL_INTEGRATION.md` is aspirational. It documents
  `apiVersion: temporal.kmsvc.io/v1` with `queueRef`, `taskQueueName` and `lifecycle`
  fields, and one worker per Queue. Reality is `kmsvc.io/v1`, none of those fields, and
  one worker per Temporal *namespace*. Do not source API documentation from it.
 - Module paths disagree across repos: `kmsvc-proto` declares
  `forgejo.riotpiao.homelab.com/...`, while `kmsvc-manage` and `kmsvc-sdk` import
  `forgejo.riotpiao.com/...`. The `.homelab.com` domain is fully retired — every
  subdomain NXDOMAINs.
 - `kmsvc-cli` README says the gRPC ingress uses TLS passthrough. It uses
  `nginx.ingress.kubernetes.io/backend-protocol: GRPC`, which terminates TLS at nginx.
  Functionally fine for clients; the wording is wrong.
@@ -1,143 +0,0 @@
 # Kong retirement — inventory and cutover
 Everything Kong does on `api.riotpiao.com` today, and where it goes. Inventory
 verified live against context `admin@homelab-cluster` on 2026-08-19.
 Source of the objects being retired: `~/workplace/homelab/k8s/apps/api/` and
 `k8s/argocd/apps/55-api-gateway.yaml`.
 ## What is running now
 Kong OSS 3.4.1, Helm chart from `https://charts.konghq.com`, DB-less, namespace
 `api`, Argo Application `kong` at sync wave 7. Two replicas. Fronted by
 `ingress-nginx` via Ingress `api/api`, which catch-alls `/` on `api.riotpiao.com`
 to `kong-proxy:80`.
 Eleven ReplicaSets exist on the Kong Deployment, the newest minutes old — this
 config is being actively iterated, so re-verify the inventory immediately before
 cutover.
 ## Routing table to port
 Seven `ingressClassName: kong` Ingresses. Six in `llm-serving`, one in `agent-pod`.
 | Method | Path | Upstream | Transform applied by Kong |
 |---|---|---|---|
 | GET | `/v1/models` | — | `request-termination`: static 200 JSON, upstream never contacted |
 | POST | `/v1/reasoning/chat/completions` | `reasoning-predictor:80` | force body `model=reasoning`, rewrite URI to `/v1/chat/completions` |
 | POST | `/v1/ornith/chat/completions` | `ornith-predictor:80` | force body `model=ornith:35b`, rewrite URI |
 | POST | `/v1/qwen/chat/completions` | `ornith-predictor:80` | force body `model=qwen2.5:3b-instruct`, rewrite URI |
 | POST | `/v1/embeddings` | `embeddings-predictor:80` | none — TEI already serves the canonical path |
 | POST | `/v1/rerank` | `reranker-predictor:80` | rewrite URI to `/rerank` (TEI does not serve `/v1/rerank`) |
 | GET/WS | `/console`, `/run`, `/sessions` | `agent-hub:9090` (`agent-pod` ns) | none, `strip-path: false` |
 Upstream model map, from the manifest comments and confirmed live:
 - `reasoning` → `reasoning-predictor` — vLLM, DeepSeek-R1-Distill-Qwen-32B, 2 replicas,
  `--max-num-seqs=4`, `--max-model-len=16384`, `--reasoning-parser=deepseek_r1`,
  `--enable-auto-tool-choice --tool-call-parser=hermes`
 - `ornith:35b` → `ornith-predictor` — Ollama, 2 replicas
 - `qwen2.5:3b-instruct` → `ornith-predictor` — same pods; both models stay resident via
  `OLLAMA_MAX_LOADED_MODELS=2`, `OLLAMA_KEEP_ALIVE=-1`
 - `nomic-ai/nomic-embed-text-v2-moe` → `embeddings-predictor` — TEI
 - `BAAI/bge-reranker-base` → `reranker-predictor` — TEI
 ### The path-per-model surface goes away
 The three chat paths exist only because Kong OSS cannot dispatch on the request
 body. The gateway serves a single `POST /v1/chat/completions` and selects the
 upstream from the body's `model` field.
 Keep the old paths as aliases during cutover so live clients do not break, then
 remove them once callers have migrated. pi is a live caller today.
 ### `/v1/models` should not be ported verbatim
 Kong serves a hardcoded list via `request-termination`. The manifest already flags
 that it can drift from what the engines actually serve. Derive the response from
 the gateway's configured upstream map instead, so the list cannot disagree with
 what routing will accept.
 ## Plugins being retired
 | Plugin | Scope | Replacement |
 |---|---|---|
 | `llm-rewrite-reasoning` / `-ornith` / `-qwen` | llm-serving | body-based dispatch in `internal/llm` |
 | `llm-rewrite-rerank` | llm-serving | per-upstream path rewrite in the route table |
 | `llm-models-list` | llm-serving | derived from the upstream map |
 | `prometheus` | **cluster-wide** | `internal/observability` — must expose bandwidth, latency, status codes, upstream health or observability regresses |
 No `rate-limiting` plugin exists anywhere in the cluster. REQUIREMENTS.md §4 Tier 2
 describes it as an existing layer; it is not built. Nothing to migrate — it is net
 new work, and it now belongs in the gateway rather than in Kong.
 ## Auth: currently off, must land on
 `KongConsumer model-invoker` exists in namespace `api` and stays defined, but the
 `key-auth` plugin is commented out and every route has `model-key-auth` stripped
 from its `konghq.com/plugins` annotation.
 **The model API is unauthenticated right now.** Confirmed live 2026-08-19: a request
 to `/v1/reasoning/chat/completions` with no credentials returns 200.
 The reason is recorded in `model-auth.yaml` — Kong's `key-auth` accepts a raw
 `apikey:` header but rejects `Authorization: Bearer`, which blocks every
 OpenAI-compatible client. That is why `~/.pi/agent/models.json` carries a
 `customHeaders: {apikey: ...}` block.
 The gateway reads Bearer tokens directly and validates them against Authentik via
 JWKS. `AUTH-PLAN.md`'s pinned-RSA-key approach and its rotation runbook are not
 needed and should not be carried over.
 Ship auth behind a flag. Turning it on breaks every current caller until they hold
 a token — pi included.
 ## Timeouts
 Kong today:
 | Route class | connect | read | write |
 |---|---|---|---|
 | chat | 10s | **1h** | 1h |
 | embeddings / rerank | 10s | 10m | 10m |
 nginx in front sets `proxy-read-timeout: 3600`, `proxy-send-timeout: 3600`,
 `proxy-buffering: off`, `proxy-body-size: 0`. Those stay — they are what makes token
 streaming work, and the gateway needs the same treatment from nginx.
 The 1-hour read timeout is deliberate: a 32B model on a Volta GPU routinely exceeds
 60s. Any shorter server-side cap must be enforced *in the gateway*, not by shortening
 the proxy timeout, or long legitimate generations get truncated mid-stream.
 ## Cutover
 Reversible at every step. Kong keeps serving until the last step.
 1. Deploy the gateway alongside Kong, unexposed. Verify in-cluster against
   `http://homelab-frontend.api.svc.cluster.local`.
 2. Compare gateway and Kong responses for every route in the table above, including
   a streaming chat request and a client disconnect mid-stream.
 3. Repoint Ingress `api/api` from `kong-proxy:80` to the gateway Service. **This is
   the cutover.** Reverting is a one-line change to the same Ingress.
 4. Soak. Watch gateway metrics and pi traffic.
 5. Delete the seven kong-class Ingresses and the six KongPlugin CRs.
 6. Remove the `kong` Application from `k8s/argocd/apps/55-api-gateway.yaml`; let Argo
   prune the Helm release, the CRDs and namespace leftovers.
 Steps 1–4 are reversible in seconds. Step 5 onward is not — do not start it until the
 soak is clean.
 All of this flows through git and Argo. No `kubectl apply`, no `helm upgrade`.
 ## Loose ends
 - `agent-pod/console` is publicly routed, unauthenticated, accepts free-form prompts
  into a shell-capable container, and exposes a WebSocket. Migrating it behind the
  gateway's auth is a security fix, not merely a port. Treat WebSocket upgrade as an
  explicit requirement of the proxy layer.
 - Eight `*.example.com` hosts exist on istio-class Ingresses in `llm-serving`
  (`{embeddings,ornith,reasoning,reranker}[-predictor]-llm-serving.example.com`).
  KServe defaults, not public, not Kong's — out of scope here, but they exist and
  should not be mistaken for gateway routes.
 - Ingress class split across the cluster is 7 kong / 17 nginx / 4 istio. Only the 7
  kong ones are in scope.
@@ -1,136 +0,0 @@
 # ADR-0001 — Retire Kong OSS in favour of a Go API gateway
 Status: Accepted
 Date: 2026-08-19
 Deciders: rock
 ## Context
 `api.riotpiao.com` is currently served by Kong OSS 3.4.1 (Helm, DB-less, namespace `api`,
 Argo wave 7), sitting behind ingress-nginx which owns TLS. Kong routes to the KServe
 model predictors in `llm-serving` via seven `ingressClassName: kong` Ingresses and six
 `KongPlugin` CRs.
 Three separate capabilities were attempted on Kong OSS. All three failed, and each
 failure is already documented in-repo by the person who hit it:
 **1. Body-based model dispatch is not expressible.**
 From `k8s/apps/api/llm-routes.yaml`:
 > a single `/v1/chat/completions` endpoint that dispatches on the body's `model` field is
 > not expressible in Kong OSS (`ai-proxy-advanced`, which does multi-target model routing,
 > is Enterprise-only).
 The workaround is a path-per-model surface (`/v1/reasoning/chat/completions`,
 `/v1/ornith/...`, `/v1/qwen/...`) with a `request-transformer` force-overwriting the body's
 `model` field. This is not OpenAI-standard, so every client needs bespoke configuration —
 visible today in `~/.pi/agent/models.json`, which carries three separate provider entries
 for what should be one endpoint.
 **2. OIDC is Enterprise-only.**
 `k8s/apps/api/AUTH-PLAN.md` routes around the missing `openid-connect` plugin using the
 built-in `jwt` plugin, which requires pinning Authentik's RSA public key onto a
 KongConsumer. That plan lists its own consequence:
 > Pinning `rsa_public_key`: Authentik key rotation would break it — document a rotation
 > runbook, or have the provision script re-export the cert PEM into the Kong credential on
 > each run.
 A rotation runbook is a standing operational liability accepted only because the gateway
 cannot fetch JWKS itself.
 **3. `key-auth` cannot read `Authorization: Bearer`.**
 From `k8s/apps/api/model-auth.yaml`:
 > a raw `apikey: <key>` header succeeds (200), the same request with only
 > `Authorization: Bearer <key>` fails (401). No OpenAI-SDK-compatible client (pi included)
 > sends a raw apikey header or lets you customize the header name, so every such client was
 > hard-blocked.
 Consequence: authentication on the model routes is **currently disabled**. Verified live
 2026-08-19 — `api.riotpiao.com/v1/reasoning/chat/completions` answers unauthenticated.
 Separately, the intended surface has grown beyond LLM routing. The target is a
 capability-per-subdomain API over cluster services — `sqs.riotpiao.com` for queue
 operations, `workflow.riotpiao.com` for Temporal, `cluster.riotpiao.com` for atlas — each
 needing request shaping, per-caller budgets and streaming semantics that are application
 concerns, not gateway-plugin concerns.
 ## Decision
 Retire Kong OSS entirely. Replace it with a purpose-built Go service,
 `homelab-frontend`, which owns north-south routing, authentication, and request shaping
 for every public capability on `*.riotpiao.com`.
 ingress-nginx keeps the edge and TLS. It forwards to the gateway instead of `kong-proxy`.
 Authentication is Authentik OIDC, validated by fetching JWKS from
 `https://authentik.riotpiao.com` at runtime.
 ## Options considered
 **A. Stay on Kong OSS, accept the workarounds.**
 Keeps a battle-tested proxy and its Prometheus plugin. But the path-per-model surface stays
 non-standard, the RSA pinning runbook stays, and auth stays off until someone writes a
 `request-transformer` shim to copy Bearer into an `apikey` header. Every new capability
 (`sqs`, `workflow`) inherits the same constraints.
 **B. Buy Kong Enterprise.**
 `ai-proxy-advanced` and `openid-connect` solve 1 and 2. Does not solve the genuinely
 application-level requirements at all — signed session cookies, per-session daily message
 budgets, a 6-of-8 GPU sequence-slot semaphore with a bounded queue, and
 disconnect-cancels-upstream are not gateway features in any tier. Cost for a homelab is not
 justifiable.
 **C. Go gateway, Kong retained for LLM paths only.**
 Gradual migration, lower risk. But it means running two gateways indefinitely, splitting the
 routing table across Kong CRDs and Go code, and keeping the Kong Helm release and its CRDs.
 The split is the thing most likely to drift.
 **D. Go gateway, Kong retired entirely.** — chosen
 One routing table, one auth implementation, one place to reason about timeouts. The logic
 being replaced is small: four `request-transformer` plugins that set a body field and
 rewrite a URI, one `request-termination` serving a static JSON model list, and one
 `prometheus` plugin. That is on the order of a hundred lines of Go, against roughly 480
 lines of YAML it retires.
 ## Consequences
 ### Gained
 - **Standard OpenAI surface.** One `POST /v1/chat/completions`, model selected from the
  request body. Any OpenAI SDK works unmodified. The three pi provider entries collapse to
  one.
 - **Working authentication.** Bearer tokens are read from the header, because it is our
  code. JWKS is fetched and cached with automatic rotation handling, so the AUTH-PLAN.md
  rotation runbook is deleted rather than written.
 - **Application-level policy becomes possible.** GPU slot semaphore, per-session budgets,
  disconnect propagation and SSE handling live where the state is.
 - **One timeout story.** Kong currently sets `read-timeout: 3600000` (1 hour) on chat
  routes, which silently defeats any shorter server-side cap. Retiring Kong removes the
  conflicting layer.
 - **~480 lines of gateway YAML deleted**, plus the Kong CRDs, the Helm release, and its
  `ServerSideApply` workaround for oversized CRD annotations.
 ### Lost / assumed
 - **We now own proxy correctness.** Connection pooling, retries, timeout propagation,
  streaming passthrough, header hygiene, graceful shutdown. `net/http/httputil.ReverseProxy`
  covers most of it, but it is our bug surface now.
 - **Kong's Prometheus plugin goes away.** The gateway must expose equivalent metrics itself
  (bandwidth, latency, status codes, upstream health) or observability regresses.
 - **Migration touches live traffic.** pi depends on `api.riotpiao.com` today. Cutover must
  be reversible — see `docs/MIGRATION-kong.md`.
 - **`agent-pod/console` is a kong-class Ingress** exposing `/console` (WebSocket), `/run`
  and `/sessions`. It must migrate too, and it is currently unauthenticated and publicly
  routed while accepting free-form prompts into a shell-capable container. Putting it behind
  the gateway's Authentik auth is a security improvement, not just a port.
 ### Risks
 - Enabling Authentik auth will break any client currently relying on the unauthenticated
  surface — including pi, until its `models.json` is updated. Auth must ship behind a flag
  and be enabled deliberately.
 - Kong's `request-termination` for `/v1/models` returns a **static** list that can drift
  from what the engines actually serve. Porting it verbatim ports the bug; the gateway
  should derive the list from configured upstreams instead.
@@ -0,0 +1,62 @@
 #!/bin/bash
 # Example: Gotify CRUD operations via notification service (X-Service routing)
 BASE_URL="${1:-https://api.riotpiao.com}"
 AUTH_TOKEN="${2:-}"
 AUTH="-H \"Authorization: Bearer $AUTH_TOKEN\""
 echo "=== Send Gotify Message ==="
 curl -s -X POST "$BASE_URL" \
  -H "X-Service: notification" \
  -H "X-Resource: send-message" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $AUTH_TOKEN" \
  -d '{
    "title": "Deployment Complete",
    "message": "homelab-frontend v1.2.0 deployed to production",
    "priority": 5
  }' | jq .
 echo ""
 echo "=== List Messages ==="
 curl -s -X GET "$BASE_URL?limit=10" \
  -H "X-Service: notification" \
  -H "X-Resource: list-messages" \
  -H "Authorization: Bearer $AUTH_TOKEN" | jq .
 echo ""
 echo "=== List Applications ==="
 curl -s -X GET "$BASE_URL" \
  -H "X-Service: notification" \
  -H "X-Resource: list-applications" \
  -H "Authorization: Bearer $AUTH_TOKEN" | jq .
 echo ""
 echo "=== Create Application ==="
 curl -s -X POST "$BASE_URL" \
  -H "X-Service: notification" \
  -H "X-Resource: create-application" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $AUTH_TOKEN" \
  -d '{
    "name": "my-monitor",
    "description": "Monitoring alerts"
  }' | jq .
 echo ""
 echo "=== Delete Message (by ID) ==="
 curl -s -X DELETE "$BASE_URL" \
  -H "X-Service: notification" \
  -H "X-Resource: delete-message" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $AUTH_TOKEN" \
  -d '{"id": 1}' | jq .
 echo ""
 echo "=== Delete Application (by ID) ==="
 curl -s -X DELETE "$BASE_URL" \
  -H "X-Service: notification" \
  -H "X-Resource: delete-application" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $AUTH_TOKEN" \
  -d '{"id": 1}' | jq .
@@ -0,0 +1,20 @@
 #!/bin/bash
 # Example: Send email via notification service (X-Service routing)
 BASE_URL="${1:-https://api.riotpiao.com}"
 AUTH_TOKEN="${2:-}"
 # Send email
 curl -s -X POST "$BASE_URL" \
  -H "X-Service: notification" \
  -H "X-Resource: send-email" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $AUTH_TOKEN" \
  -d '{
    "to": "[email protected]",
    "cc": "[email protected]",
    "subject": "System Alert",
    "body": "CPU usage exceeded 90% threshold"
  }' | jq .
 echo ""
@@ -0,0 +1,359 @@
 #!/usr/bin/env python3
 """
 Temporal Workflows API Client Examples
 Demonstrates how to use the /workflows endpoint with Python
 """
 import requests
 import json
 import time
 from typing import Dict, Any, List, Optional
 GATEWAY = "https://api.riotpiao.com"
 class WorkflowClient:
    """Simple client for interacting with the Workflows API"""
    def __init__(self, base_url: str = GATEWAY):
        self.base_url = base_url
        self.session = requests.Session()
    def execute_workflow(
        self,
        workflow: str,
        input_data: Dict[str, Any],
        timeout: Optional[int] = None,
        wait: bool = True,
    ) -> Dict[str, Any]:
        """
        Execute a workflow
        Args:
            workflow: Workflow name
            input_data: Input parameters for the workflow
            timeout: Timeout in seconds (default: 30)
            wait: Whether to wait for completion (default: True)
        Returns:
            Workflow response dict with status, output, etc.
        """
        payload = {
            "workflow": workflow,
            "input": input_data,
        }
        if timeout is not None:
            payload["timeout"] = timeout
        if not wait:
            payload["wait"] = False
        response = self.session.post(
            f"{self.base_url}/workflows",
            json=payload,
            headers={"Content-Type": "application/json"},
        )
        response.raise_for_status()
        return response.json()
    def chat_and_embed(
        self, model: str, messages: List[Dict[str, str]], embed_model: Optional[str] = None
    ) -> Dict[str, Any]:
        """
        Chat with a model and embed the response
        Args:
            model: Chat model name
            messages: Messages in OpenAI format
            embed_model: Optional embedding model (default: nomic-ai/nomic-embed-text-v2-moe)
        Returns:
            Workflow response with chat and embedding results
        """
        input_data = {
            "model": model,
            "messages": messages,
        }
        if embed_model:
            input_data["embed_model"] = embed_model
        return self.execute_workflow("chat-and-embed", input_data)
    def multi_model_chat(self, models: List[str], messages: List[Dict[str, str]]) -> Dict[str, Any]:
        """
        Chat with multiple models and compare responses
        Args:
            models: List of model names
            messages: Messages in OpenAI format
        Returns:
            Workflow response with results from all models
        """
        return self.execute_workflow(
            "multi-model-chat",
            {
                "models": models,
                "messages": messages,
            },
        )
    def rag_pipeline(
        self,
        query: str,
        documents: List[str],
        model: Optional[str] = None,
        rerank_model: Optional[str] = None,
        top_k: int = 3,
    ) -> Dict[str, Any]:
        """
        RAG pipeline: rerank documents and answer based on top results
        Args:
            query: User query or question
            documents: List of document texts
            model: Chat model (default: "reasoning")
            rerank_model: Reranker model (default: "BAAI/bge-reranker-base")
            top_k: Number of top documents to use (default: 3)
        Returns:
            Workflow response with reranked documents and chat answer
        """
        input_data = {
            "query": query,
            "documents": documents,
            "top_k": top_k,
        }
        if model:
            input_data["model"] = model
        if rerank_model:
            input_data["rerank_model"] = rerank_model
        return self.execute_workflow("rag-pipeline", input_data)
    def batch_embeddings(
        self, texts: List[str], model: Optional[str] = None
    ) -> Dict[str, Any]:
        """
        Generate embeddings for multiple texts
        Args:
            texts: List of text strings
            model: Embedding model (default: nomic-ai/nomic-embed-text-v2-moe)
        Returns:
            Workflow response with embedding results
        """
        input_data = {"texts": texts}
        if model:
            input_data["model"] = model
        return self.execute_workflow("batch-embeddings", input_data)
 def example_chat_and_embed():
    """Example: Chat and embed"""
    print("\n" + "="*50)
    print("Example 1: Chat and Embed")
    print("="*50)
    client = WorkflowClient()
    result = client.chat_and_embed(
        model="reasoning",
        messages=[
            {
                "role": "user",
                "content": "What is machine learning in one sentence?",
            }
        ],
    )
    print(f"Workflow ID: {result['id']}")
    print(f"Status: {result['status']}")
    print(f"Chat Response: {result['output']['chat_response']['choices'][0]['message']['content']}")
    print(f"Embedding dimensions: {len(result['output']['embedding_response']['data'][0]['embedding'])}")
 def example_multi_model_chat():
    """Example: Multi-model chat"""
    print("\n" + "="*50)
    print("Example 2: Multi-Model Chat")
    print("="*50)
    client = WorkflowClient()
    result = client.multi_model_chat(
        models=["reasoning", "ornith:35b"],
        messages=[
            {
                "role": "user",
                "content": "What is the capital of France?",
            }
        ],
    )
    print(f"Workflow ID: {result['id']}")
    print(f"Status: {result['status']}")
    for model_result in result["output"]:
        model = model_result["model"]
        if "result" in model_result:
            content = model_result["result"]["choices"][0]["message"]["content"]
            print(f"\n{model}: {content}")
        elif "error" in model_result:
            print(f"\n{model}: Error - {model_result['error']}")
 def example_rag_pipeline():
    """Example: RAG pipeline"""
    print("\n" + "="*50)
    print("Example 3: RAG Pipeline")
    print("="*50)
    client = WorkflowClient()
    result = client.rag_pipeline(
        query="How does photosynthesis work?",
        documents=[
            "Photosynthesis is the process by which plants convert sunlight into chemical energy.",
            "The mitochondria is the powerhouse of the cell.",
            "Light reactions occur in the thylakoid membrane of chloroplasts.",
            "Dogs are domesticated animals.",
            "The Calvin cycle produces glucose from CO2.",
        ],
        top_k=2,
    )
    print(f"Workflow ID: {result['id']}")
    print(f"Status: {result['status']}")
    print(f"\nTop Documents:")
    for i, doc in enumerate(result["output"]["reranked_documents"], 1):
        print(f"  {i}. {doc[:80]}...")
    print(f"\nChat Response:")
    print(f"  {result['output']['chat_response']['choices'][0]['message']['content'][:200]}...")
 def example_batch_embeddings():
    """Example: Batch embeddings"""
    print("\n" + "="*50)
    print("Example 4: Batch Embeddings")
    print("="*50)
    client = WorkflowClient()
    result = client.batch_embeddings(
        texts=[
            "The quick brown fox",
            "Machine learning is powerful",
            "Python is a great language",
        ]
    )
    print(f"Workflow ID: {result['id']}")
    print(f"Status: {result['status']}")
    print(f"Number of embeddings: {len(result['output']['data'])}")
    print(f"Embedding dimensions: {len(result['output']['data'][0]['embedding'])}")
    print(f"Model used: {result['output']['model']}")
 def example_error_handling():
    """Example: Error handling"""
    print("\n" + "="*50)
    print("Example 5: Error Handling")
    print("="*50)
    client = WorkflowClient()
    # Try unknown workflow
    print("\nAttempting unknown workflow...")
    try:
        result = client.execute_workflow("nonexistent", {})
        if result.get("status") == "failed":
            print(f"Workflow failed: {result.get('error')}")
        else:
            print(f"Response: {json.dumps(result, indent=2)}")
    except requests.exceptions.HTTPError as e:
        print(f"HTTP Error: {e}")
        print(f"Response: {e.response.json()}")
    # Try missing required parameter
    print("\nAttempting chat-and-embed without model...")
    try:
        result = client.execute_workflow("chat-and-embed", {"messages": []})
        if result.get("status") == "failed":
            print(f"Workflow failed: {result.get('error')}")
    except requests.exceptions.HTTPError as e:
        print(f"HTTP Error: {e}")
 def example_custom_timeout():
    """Example: Custom timeout"""
    print("\n" + "="*50)
    print("Example 6: Custom Timeout")
    print("="*50)
    client = WorkflowClient()
    start = time.time()
    result = client.execute_workflow(
        "batch-embeddings",
        {"texts": ["Hello world"]},
        timeout=60,
    )
    elapsed = time.time() - start
    print(f"Workflow ID: {result['id']}")
    print(f"Status: {result['status']}")
    print(f"Time taken: {elapsed:.2f}s")
    print(f"Created at: {result['created_at']}")
    if result.get("completed_at"):
        print(f"Completed at: {result['completed_at']}")
 def example_async_execution():
    """Example: Async execution (fire and forget)"""
    print("\n" + "="*50)
    print("Example 7: Async Execution")
    print("="*50)
    client = WorkflowClient()
    result = client.execute_workflow(
        "batch-embeddings",
        {"texts": ["text1", "text2", "text3"]},
        wait=False,
    )
    print(f"Workflow ID: {result['id']}")
    print(f"Status: {result['status']}")
    print(f"Created at: {result['created_at']}")
    print(f"Note: Workflow is running asynchronously. Status is {result['status']}.")
 if __name__ == "__main__":
    print("Temporal Workflows API Examples")
    print("================================\n")
    # Run examples (comment out if you don't want to call the actual API)
    try:
        example_batch_embeddings()  # Start with simplest example
        print("\n" + "="*50)
        print("✓ Examples completed successfully!")
        print("="*50)
    except requests.exceptions.ConnectionError:
        print("\n✗ Could not connect to gateway")
        print("Make sure the gateway is running at:", GATEWAY)
    except Exception as e:
        print(f"\n✗ Error: {e}")
    # Show all available methods
    print("\n\nAvailable Methods:")
    print("-" * 50)
    client = WorkflowClient()
    print(f"  - chat_and_embed(model, messages, embed_model)")
    print(f"  - multi_model_chat(models, messages)")
    print(f"  - rag_pipeline(query, documents, model, rerank_model, top_k)")
    print(f"  - batch_embeddings(texts, model)")
    print(f"  - execute_workflow(workflow, input, timeout, wait)")
@@ -0,0 +1,195 @@
 #!/bin/bash
 # Temporal Workflows API Examples
 # This script demonstrates how to use the /workflows endpoint
 GATEWAY="https://api.riotpiao.com"
 echo "=========================================="
 echo "Temporal Workflows API Examples"
 echo "=========================================="
 echo ""
 # Example 1: Chat and Embed Workflow
 echo "1. Chat and Embed Workflow"
 echo "   Chats with a model and embeds the response"
 echo ""
 curl -X POST "$GATEWAY/workflows" \
  -H 'Content-Type: application/json' \
  -d '{
    "workflow": "chat-and-embed",
    "input": {
      "model": "reasoning",
      "messages": [
        {
          "role": "user",
          "content": "What is machine learning in one sentence?"
        }
      ]
    }
  }' | jq '.'
 echo ""
 echo "---"
 echo ""
 # Example 2: Multi-Model Chat Workflow
 echo "2. Multi-Model Chat Workflow"
 echo "   Compares responses from multiple models"
 echo ""
 curl -X POST "$GATEWAY/workflows" \
  -H 'Content-Type: application/json' \
  -d '{
    "workflow": "multi-model-chat",
    "input": {
      "models": ["reasoning", "ornith:35b"],
      "messages": [
        {
          "role": "user",
          "content": "What is the capital of France?"
        }
      ]
    }
  }' | jq '.'
 echo ""
 echo "---"
 echo ""
 # Example 3: RAG Pipeline Workflow
 echo "3. RAG (Retrieval-Augmented Generation) Pipeline"
 echo "   Reranks documents and answers based on top results"
 echo ""
 curl -X POST "$GATEWAY/workflows" \
  -H 'Content-Type: application/json' \
  -d '{
    "workflow": "rag-pipeline",
    "input": {
      "query": "How does photosynthesis work?",
      "documents": [
        "Photosynthesis is the process by which plants convert sunlight into chemical energy stored in glucose.",
        "The mitochondria is the powerhouse of the cell and is responsible for ATP production.",
        "Light reactions occur in the thylakoid membrane of chloroplasts and produce ATP and NADPH.",
        "Dogs are domesticated mammals that have been selectively bred for thousands of years.",
        "The Calvin cycle is the light-independent reaction that converts CO2 into glucose."
      ],
      "top_k": 3
    }
  }' | jq '.'
 echo ""
 echo "---"
 echo ""
 # Example 4: Batch Embeddings Workflow
 echo "4. Batch Embeddings Workflow"
 echo "   Generates embeddings for multiple texts efficiently"
 echo ""
 curl -X POST "$GATEWAY/workflows" \
  -H 'Content-Type: application/json' \
  -d '{
    "workflow": "batch-embeddings",
    "input": {
      "texts": [
        "The quick brown fox jumps over the lazy dog",
        "Machine learning enables computers to learn from data",
        "Python is a popular programming language for AI",
        "Natural language processing powers conversational AI"
      ],
      "model": "nomic-ai/nomic-embed-text-v2-moe"
    }
  }' | jq '.output | {model, usage, data: [.data[] | {index, embedding: (.embedding[:3])}]}'
 echo ""
 echo "---"
 echo ""
 # Example 5: Workflow with Custom Timeout
 echo "5. Workflow with Custom Timeout"
 echo "   Specify a longer timeout for complex operations"
 echo ""
 curl -X POST "$GATEWAY/workflows" \
  -H 'Content-Type: application/json' \
  -d '{
    "workflow": "chat-and-embed",
    "input": {
      "model": "reasoning",
      "messages": [
        {
          "role": "user",
          "content": "Explain quantum computing"
        }
      ]
    },
    "timeout": 60
  }' | jq '.id, .status, .created_at'
 echo ""
 echo "---"
 echo ""
 # Example 6: Error Handling - Unknown Workflow
 echo "6. Error Handling - Unknown Workflow"
 echo ""
 curl -X POST "$GATEWAY/workflows" \
  -H 'Content-Type: application/json' \
  -d '{
    "workflow": "nonexistent-workflow",
    "input": {}
  }' | jq '.'
 echo ""
 echo "---"
 echo ""
 # Example 7: Error Handling - Missing Required Parameters
 echo "7. Error Handling - Missing Required Parameters"
 echo ""
 curl -X POST "$GATEWAY/workflows" \
  -H 'Content-Type: application/json' \
  -d '{
    "workflow": "chat-and-embed",
    "input": {
      "messages": [{"role": "user", "content": "hi"}]
    }
  }' | jq '.'
 echo ""
 echo "---"
 echo ""
 # Example 8: Workflow Response Format
 echo "8. Understanding Workflow Response Format"
 echo ""
 response=$(curl -s -X POST "$GATEWAY/workflows" \
  -H 'Content-Type: application/json' \
  -d '{
    "workflow": "batch-embeddings",
    "input": {
      "texts": ["Hello world"]
    }
  }')
 echo "Response Structure:"
 echo "$response" | jq '{
  id: .id,
  workflow: .workflow,
  status: .status,
  created_at: .created_at,
  completed_at: .completed_at,
  has_output: (.output != null),
  has_error: (.error != null)
 }'
 echo ""
 echo "=========================================="
 echo "Workflow Examples Complete!"
 echo "=========================================="
@@ -1,5 +1,47 @@
-module github.com/Riotpiaole/homelab-frontend
+module forgejo.riotpiao.com/rock/homelab-frontend
-go 1.25.0
+go 1.26.0
-require gopkg.in/yaml.v3 v3.0.1 // indirect
+require (
 	github.com/MicahParks/keyfunc/v2 v2.1.0
 	github.com/golang-jwt/jwt/v5 v5.3.1
 	go.opentelemetry.io/otel v1.46.0
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.46.0
 	go.opentelemetry.io/otel/sdk v1.46.0
 	go.opentelemetry.io/otel/trace v1.46.0
 	go.temporal.io/api v1.63.5
 	go.temporal.io/sdk v1.48.0
 	google.golang.org/grpc v1.83.2
 	google.golang.org/protobuf v1.36.12
 	gopkg.in/yaml.v3 v3.0.1
 )
 require (
 	github.com/cenkalti/backoff/v5 v5.0.3 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/facebookgo/clock v0.0.0-20150410010913-600d898af40a // indirect
 	github.com/go-logr/logr v1.4.4 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/mock v1.6.0 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/grpc-ecosystem/go-grpc-middleware/v2 v2.3.2 // indirect
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.30.0 // indirect
 	github.com/nexus-rpc/nexus-proto-annotations v0.1.0 // indirect
 	github.com/nexus-rpc/sdk-go v0.7.0 // indirect
 	github.com/robfig/cron v1.2.0 // indirect
 	github.com/stretchr/objx v0.5.3 // indirect
 	github.com/stretchr/testify v1.12.1 // indirect
 	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.46.0 // indirect
 	go.opentelemetry.io/otel/metric v1.46.0 // indirect
 	go.opentelemetry.io/proto/otlp v1.11.0 // indirect
 	go.yaml.in/yaml/v3 v3.0.5 // indirect
 	golang.org/x/net v0.58.0 // indirect
 	golang.org/x/sync v0.22.0 // indirect
 	golang.org/x/sys v0.47.0 // indirect
 	golang.org/x/text v0.41.0 // indirect
 	golang.org/x/time v0.3.0 // indirect
 	google.golang.org/genproto/googleapis/api v0.0.0-20260819154853-08b0e4226688 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20260819154853-08b0e4226688 // indirect
 )
@@ -1,3 +1,134 @@
 github.com/MicahParks/keyfunc/v2 v2.1.0 h1:6ZXKb9Rp6qp1bDbJefnG7cTH8yMN1IC/4nf+GVjO99k=
 github.com/MicahParks/keyfunc/v2 v2.1.0/go.mod h1:rW42fi+xgLJ2FRRXAfNx9ZA8WpD4OeE/yHVMteCkw9k=
 github.com/cenkalti/backoff/v5 v5.0.3 h1:ZN+IMa753KfX5hd8vVaMixjnqRZ3y8CuJKRKj1xcsSM=
 github.com/cenkalti/backoff/v5 v5.0.3/go.mod h1:rkhZdG3JZukswDf7f0cwqPNk4K0sa+F97BxZthm/crw=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
 github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/facebookgo/clock v0.0.0-20150410010913-600d898af40a h1:yDWHCSQ40h88yih2JAcL6Ls/kVkSE8GFACTGVnMPruw=
 github.com/facebookgo/clock v0.0.0-20150410010913-600d898af40a/go.mod h1:7Ga40egUymuWXxAe151lTNnCv97MddSOVsjpPPkityA=
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@@ -0,0 +1,198 @@
 package auth
 import (
 	"context"
 	"fmt"
 	"strings"
 	"sync"
 	"time"
 	"github.com/MicahParks/keyfunc/v2"
 	"github.com/golang-jwt/jwt/v5"
 )
 // isValidIssuer checks if issuer is from Authentik (any provider/app).
 // Accepts: https://authentik.riotpiao.com/application/o/{provider}/
 func isValidIssuer(iss string) bool {
 	return strings.Contains(iss, "authentik.riotpiao.com/application/o/") &&
 		strings.HasSuffix(iss, "/")
 }
 // Validator validates JWTs against Authentik JWKS.
 // Supports multi-issuer: any Authentik service account provider is accepted
 // (portfolio-agent, memory-agent, api-gw, etc.) because all share the same
 // JWKS signing key.
 type Validator struct {
 	issuer   string // Not used for validation (kept for logging); issuer regex check is sufficient
 	audience string // Not used for validation; any audience from valid Authentik issuer is accepted
 	jwksURL  string
 	jwks     *keyfunc.JWKS
 	mu       sync.Mutex
 }
 // NewValidator creates a new JWT validator for a service.
 // issuer and audience params are deprecated (ignored for validation) but kept
 // for backward compatibility. Multi-issuer validation via isValidIssuer() is used instead.
 // JWKS fetching is lazy (deferred until first validation).
 func NewValidator(issuer, audience, jwksURL string) *Validator {
 	return &Validator{
 		issuer:   issuer,   // deprecated param, kept for compat
 		audience: audience, // deprecated param, kept for compat
 		jwksURL:  jwksURL,
 		jwks:     nil, // Lazy-loaded on first use
 	}
 }
 // ensureJWKS fetches JWKS on first use (lazy initialization, thread-safe).
 func (v *Validator) ensureJWKS() error {
 	v.mu.Lock()
 	defer v.mu.Unlock()
 	if v.jwks != nil {
 		return nil
 	}
 	options := keyfunc.Options{
 		Ctx:              context.Background(),
 		RefreshInterval:  15 * time.Minute,
 		RefreshRateLimit: 5 * time.Minute,
 		RefreshTimeout:   10 * time.Second,
 		RefreshErrorHandler: func(err error) {
 			fmt.Printf("JWKS refresh error for %s: %v\n", v.issuer, err)
 		},
 	}
 	jwks, err := keyfunc.Get(v.jwksURL, options)
 	if err != nil {
 		return fmt.Errorf("failed to fetch JWKS from %s: %v", v.jwksURL, err)
 	}
 	v.jwks = jwks
 	return nil
 }
 // ValidateBearerToken extracts and validates the Bearer token from Authorization header.
 // Returns claims on success, error message on failure.
 func (v *Validator) ValidateBearerToken(authHeader string) (jwt.MapClaims, error) {
 	if authHeader == "" {
 		return nil, fmt.Errorf("missing Authorization header")
 	}
 	// Extract token from "Bearer <token>"
 	tokenString := ""
 	if len(authHeader) > 7 && authHeader[:7] == "Bearer " {
 		tokenString = authHeader[7:]
 	} else {
 		return nil, fmt.Errorf("invalid Authorization header format")
 	}
 	// Ensure JWKS is loaded (lazy)
 	if err := v.ensureJWKS(); err != nil {
 		return nil, err
 	}
 	// Parse and validate
 	claims := jwt.MapClaims{}
 	token, err := jwt.ParseWithClaims(tokenString, claims, v.jwks.Keyfunc)
 	if err != nil {
 		return nil, fmt.Errorf("token validation failed: %v", err)
 	}
 	if !token.Valid {
 		return nil, fmt.Errorf("token is invalid")
 	}
 	// Verify required claims
 	now := time.Now()
 	const skew = 60 * time.Second
 	// Check exp
 	if exp, ok := claims["exp"].(float64); ok {
 		if time.Now().After(time.Unix(int64(exp), 0).Add(skew)) {
 			return nil, fmt.Errorf("token expired")
 		}
 	}
 	// Check nbf (not before)
 	if nbf, ok := claims["nbf"].(float64); ok {
 		if now.Before(time.Unix(int64(nbf), 0).Add(-skew)) {
 			return nil, fmt.Errorf("token not yet valid")
 		}
 	}
 	// Check iss (issuer) - accept any Authentik provider issuer
 	// (portfolio-agent, memory-agent, api-gw, etc.)
 	// All use same signing key so JWKS validation is sufficient
 	if iss, ok := claims["iss"].(string); !ok {
 		return nil, fmt.Errorf("missing issuer claim")
 	} else if !isValidIssuer(iss) {
 		return nil, fmt.Errorf("invalid issuer: %s", iss)
 	}
 	// Check aud (audience) - accept any Authentik-provided audience
 	// since all Authentik service accounts use the same signing key.
 	// The issuer check above is sufficient to ensure JWT came from Authentik.
 	if aud, ok := claims["aud"].(string); !ok {
 		return nil, fmt.Errorf("missing audience claim")
 	} else if aud == "" {
 		return nil, fmt.Errorf("empty audience claim")
 	}
 	// Note: Not hardcoding expected audience. Any audience from a valid Authentik
 	// issuer is accepted, since all service accounts are under the same trust boundary.
 	return claims, nil
 }
 // CheckPermissions checks if claims contain required permission(s).
 // Checks both "permissions" claim (for users) and "roles" claim (for service accounts).
 // Returns true if any required permission is found or wildcard "*" exists.
 func (v *Validator) CheckPermissions(claims jwt.MapClaims, required ...string) bool {
 	// Try permissions claim first (for user tokens)
 	if permsIface, ok := claims["permissions"]; ok {
 		if perms, ok := permsIface.([]interface{}); ok {
 			if v.checkPermList(perms, required...) {
 				return true
 			}
 		}
 	}
 	// Fall back to roles claim (for service account tokens)
 	if rolesIface, ok := claims["roles"]; ok {
 		if roles, ok := rolesIface.([]interface{}); ok {
 			if v.checkPermList(roles, required...) {
 				return true
 			}
 		}
 	}
 	return false
 }
 // checkPermList is a helper that checks a permission/role list.
 func (v *Validator) checkPermList(perms []interface{}, required ...string) bool {
 	for _, perm := range perms {
 		permStr, ok := perm.(string)
 		if !ok {
 			continue
 		}
 		if permStr == "*" {
 			return true
 		}
 		for _, req := range required {
 			if permStr == req {
 				return true
 			}
 		}
 	}
 	return false
 }
 // DecodeToken decodes JWT payload without verification (for debugging/testing).
 func DecodeToken(tokenString string) (jwt.MapClaims, error) {
 	claims := jwt.MapClaims{}
 	_, _, err := new(jwt.Parser).ParseUnverified(tokenString, claims)
 	if err != nil {
 		return nil, err
 	}
 	return claims, nil
 }
@@ -0,0 +1,76 @@
 package auth
 import (
 	"testing"
 	"github.com/golang-jwt/jwt/v5"
 )
 func TestCheckPermissions(t *testing.T) {
 	validator := NewValidator(
 		"https://authentik.riotpiao.com/application/o/sqs/",
 		"sqs",
 		"https://authentik.riotpiao.com/application/o/sqs/jwks/",
 	)
 	// Test 1: Finds sqs:read
 	claims1 := jwt.MapClaims{
 		"permissions": []interface{}{"sqs:read", "memory:write"},
 	}
 	if !validator.CheckPermissions(claims1, "sqs:read", "sqs:write") {
 		t.Fatal("expected to find sqs:read permission")
 	}
 	// Test 2: Finds wildcard
 	claims2 := jwt.MapClaims{
 		"permissions": []interface{}{"*"},
 	}
 	if !validator.CheckPermissions(claims2, "sqs:read") {
 		t.Fatal("expected to find wildcard permission")
 	}
 	// Test 3: Rejects when missing
 	claims3 := jwt.MapClaims{
 		"permissions": []interface{}{"memory:read"},
 	}
 	if validator.CheckPermissions(claims3, "sqs:read") {
 		t.Fatal("expected to reject missing permission")
 	}
 	// Test 4: Handles missing permissions claim
 	claims4 := jwt.MapClaims{}
 	if validator.CheckPermissions(claims4, "sqs:read") {
 		t.Fatal("expected to reject missing permissions claim")
 	}
 	t.Log("✅ All permission checks passed")
 }
 func TestValidateBearerToken(t *testing.T) {
 	validator := NewValidator(
 		"https://authentik.riotpiao.com/application/o/sqs/",
 		"sqs",
 		"https://authentik.riotpiao.com/application/o/sqs/jwks/",
 	)
 	// Test 1: Empty token
 	_, err := validator.ValidateBearerToken("")
 	if err == nil {
 		t.Fatal("expected error for empty token")
 	}
 	t.Logf("✅ Correctly rejected empty token: %v", err)
 	// Test 2: Invalid format
 	_, err = validator.ValidateBearerToken("not-a-bearer-token")
 	if err == nil {
 		t.Fatal("expected error for invalid format")
 	}
 	t.Logf("✅ Correctly rejected invalid format: %v", err)
 	// Test 3: Invalid token payload
 	_, err = validator.ValidateBearerToken("Bearer invalid.token.format")
 	if err == nil {
 		t.Fatal("expected error for invalid token")
 	}
 	t.Logf("✅ Correctly rejected invalid token: %v", err)
 }
@@ -0,0 +1,104 @@
 package config_test
 import (
 	"os"
 	"path/filepath"
 	"testing"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
 )
 func TestLoadAuthConfig_TokenURLAndClientID(t *testing.T) {
 	yaml := `
 routes: []
 models: []
 auth:
  enabled: true
  issuer: "https://authentik.example.com/application/o/api-gw/"
  audience: "api-gw"
  jwksUrl: "https://authentik.example.com/application/o/api-gw/jwks/"
  requiredCapability: "llm:inference"
  tokenUrl: "https://authentik.example.com/application/o/token/"
  clientId: "api-gw"
 `
 	dir := t.TempDir()
 	path := filepath.Join(dir, "config.yaml")
 	if err := os.WriteFile(path, []byte(yaml), 0644); err != nil {
 		t.Fatal(err)
 	}
 	// Set env for client secret
 	t.Setenv("AUTH_CLIENT_SECRET", "test-secret-value")
 	_, _, _, auth, err := config.LoadRoutesAndModelsFromFile(path)
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
 	if !auth.Enabled {
 		t.Error("auth should be enabled")
 	}
 	if auth.TokenURL != "https://authentik.example.com/application/o/token/" {
 		t.Errorf("tokenUrl = %q, want authentik token endpoint", auth.TokenURL)
 	}
 	if auth.ClientID != "api-gw" {
 		t.Errorf("clientId = %q, want api-gw", auth.ClientID)
 	}
 	if auth.ClientSecret != "test-secret-value" {
 		t.Errorf("clientSecret = %q, want test-secret-value", auth.ClientSecret)
 	}
 }
 func TestLoadAuthConfig_ClientSecretFromEnvOnly(t *testing.T) {
 	yaml := `
 routes: []
 models: []
 auth:
  enabled: true
  tokenUrl: "https://example.com/token/"
  clientId: "test"
 `
 	dir := t.TempDir()
 	path := filepath.Join(dir, "config.yaml")
 	os.WriteFile(path, []byte(yaml), 0644)
 	// No AUTH_CLIENT_SECRET env set
 	t.Setenv("AUTH_CLIENT_SECRET", "")
 	_, _, _, auth, err := config.LoadRoutesAndModelsFromFile(path)
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
 	if auth.ClientSecret != "" {
 		t.Errorf("clientSecret should be empty when env not set, got %q", auth.ClientSecret)
 	}
 }
 func TestLoadAuthConfig_BackwardCompatible(t *testing.T) {
 	// Config without tokenUrl/clientId should still load (zero values)
 	yaml := `
 routes: []
 models: []
 auth:
  enabled: true
  issuer: "https://example.com/"
  jwksUrl: "https://example.com/jwks/"
  requiredCapability: "llm:inference"
 `
 	dir := t.TempDir()
 	path := filepath.Join(dir, "config.yaml")
 	os.WriteFile(path, []byte(yaml), 0644)
 	_, _, _, auth, err := config.LoadRoutesAndModelsFromFile(path)
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
 	if auth.TokenURL != "" {
 		t.Errorf("tokenUrl should be empty, got %q", auth.TokenURL)
 	}
 	if auth.ClientID != "" {
 		t.Errorf("clientId should be empty, got %q", auth.ClientID)
 	}
 }
@@ -3,7 +3,7 @@ package config_test
 import (
 	"testing"
-	"github.com/Riotpiaole/homelab-frontend/internal/config"
+	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
 )
 // TestLoadRoutesMissingAuthRequired tests that the auth-required flag is not a silent default:
@@ -4,6 +4,8 @@ import (
 	"fmt"
 	"os"
 	"time"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/serviceadapter"
 )
 // Config holds the gateway configuration.
@@ -18,6 +20,12 @@ type Config struct {
 	// Models maps model names to their upstream configuration.
 	// Multiple models can point to the same upstream address.
 	Models map[string]*ModelUpstream
 	// Adapters holds service adapter definitions for X-Service routing.
 	Adapters []*serviceadapter.ServiceAdapter
 	// Auth holds JWT authentication configuration for /v1/* endpoints.
 	Auth AuthConfig
 	// Temporal holds Temporal server configuration.
 	Temporal TemporalConfig
 }
 // ModelUpstream holds upstream configuration for a specific model.
@@ -25,9 +33,45 @@ type ModelUpstream struct {
 	// Name is the model name clients send (e.g., "reasoning", "ornith:35b").
 	Name string
 	// Address is the upstream server address (host:port).
 	// When Addresses is set, this holds Addresses[0] for backward compatibility.
 	Address string
 	// Addresses holds all backend addresses for multi-backend cache-aware routing.
 	// Populated from the 'addresses' YAML field; backward-compat with single 'address'.
 	Addresses []string
 	// Path is the upstream path for this model (e.g., "/v1/chat/completions").
 	Path string
 	// UpstreamModel is the model name to send to the upstream server.
 	// If empty, the client-provided model name (Name) is used as-is.
 	// Use this when the upstream expects a different model name than clients send.
 	UpstreamModel string
 	// AuthRequired indicates whether this model requires JWT authentication.
 	AuthRequired bool
 }
 // TemporalConfig holds Temporal server configuration.
 type TemporalConfig struct {
 	// HostPort is the address of the Temporal server (host:port).
 	HostPort string
 }
 // AuthConfig holds JWT authentication configuration.
 type AuthConfig struct {
 	// Enabled globally enables/disables auth for /v1/* endpoints.
 	Enabled bool
 	// Issuer is the expected JWT issuer (iss claim).
 	Issuer string
 	// Audience is the expected JWT audience (aud claim).
 	Audience string
 	// JWKSURL is the URL to fetch JSON Web Key Set for signature validation.
 	JWKSURL string
 	// RequiredCapability is the permission required for LLM inference (e.g., "llm:inference").
 	RequiredCapability string
 	// TokenURL is the Authentik token endpoint for password/refresh grants.
 	TokenURL string
 	// ClientID is the OAuth2 client ID for token exchange.
 	ClientID string
 	// ClientSecret is the OAuth2 client secret (loaded from env, never from config file).
 	ClientSecret string
 }
 // Route represents a single route and its upstream configuration.
@@ -76,6 +120,18 @@ func (c *Config) ModelNames() []string {
 	return names
 }
 // AllAddresses returns all configured backend addresses for the model.
 // Returns Addresses if non-empty; otherwise wraps Address in a slice.
 func (m *ModelUpstream) AllAddresses() []string {
 	if len(m.Addresses) > 0 {
 		return m.Addresses
 	}
 	if m.Address != "" {
 		return []string{m.Address}
 	}
 	return nil
 }
 // Load reads configuration from environment variables with defaults.
 func Load() (*Config, error) {
 	listenAddr := "127.0.0.1:8080"
@@ -94,16 +150,26 @@ func Load() (*Config, error) {
 		shutdownTimeout = d
 	}
-	// Load routes and models from config file
+	// Load routes, models, adapters, and auth from config file
 	routes := make(map[string]*Route)
 	models := make(map[string]*ModelUpstream)
 	var adapters []*serviceadapter.ServiceAdapter
 	var authConfig AuthConfig
 	if configPath, ok := os.LookupEnv("CONFIG_PATH"); ok {
-		loadedRoutes, loadedModels, err := LoadRoutesAndModelsFromFile(configPath)
+		loadedRoutes, loadedModels, loadedAdapters, loadedAuth, err := LoadRoutesAndModelsFromFile(configPath)
 		if err != nil {
 			return nil, err
 		}
 		routes = loadedRoutes
 		models = loadedModels
 		adapters = loadedAdapters
 		authConfig = loadedAuth
 	}
 	temporalHostPort := "localhost:7233"
 	// Allow override via environment variable
 	if hostPort, ok := os.LookupEnv("TEMPORAL_HOST_PORT"); ok {
 		temporalHostPort = hostPort
 	}
 	return &Config{
@@ -111,5 +177,10 @@ func Load() (*Config, error) {
 		ShutdownTimeout: shutdownTimeout,
 		Routes:          routes,
 		Models:          models,
 		Adapters:        adapters,
 		Auth:            authConfig,
 		Temporal: TemporalConfig{
 			HostPort: temporalHostPort,
 		},
 	}, nil
 }
@@ -4,7 +4,7 @@ import (
 	"testing"
 	"time"
-	"github.com/Riotpiaole/homelab-frontend/internal/config"
+	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
 )
 // TestLoadRoutesValidConfig tests that a valid configuration loads correctly.
@@ -5,7 +5,7 @@ import (
 	"testing"
 	"time"
-	"github.com/Riotpiaole/homelab-frontend/internal/config"
+	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
 )
 // TestLoadIntegration tests the full Load function with CONFIG_PATH env var
@@ -6,13 +6,27 @@ import (
 	"os"
 	"time"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/serviceadapter"
 	"gopkg.in/yaml.v3"
 )
 // rawConfig represents the structure of the YAML configuration file.
 type rawConfig struct {
-	Routes []rawRoute `yaml:"routes"`
+	Routes   []rawRoute   `yaml:"routes"`
-	Models []rawModel `yaml:"models"`
+	Models   []rawModel   `yaml:"models"`
 	Adapters []rawAdapter `yaml:"adapters"`
 	Auth     rawAuth      `yaml:"auth"`
 }
 // rawAuth represents auth configuration in YAML.
 type rawAuth struct {
 	Enabled            bool   `yaml:"enabled"`
 	Issuer             string `yaml:"issuer"`
 	Audience           string `yaml:"audience"`
 	JWKSURL            string `yaml:"jwksUrl"`
 	RequiredCapability string `yaml:"requiredCapability"`
 	TokenURL           string `yaml:"tokenUrl"`
 	ClientID           string `yaml:"clientId"`
 }
 // rawRoute represents a single route in the YAML configuration.
@@ -23,9 +37,35 @@ type rawRoute struct {
 // rawModel represents a single model entry in the YAML configuration.
 type rawModel struct {
-	Name    string `yaml:"name"`
+	Name          string   `yaml:"name"`
-	Address string `yaml:"address"`
+	Address       string   `yaml:"address"`
-	Path    string `yaml:"path"`
+	Addresses     []string `yaml:"addresses"`
 	Path          string   `yaml:"path"`
 	UpstreamModel string `yaml:"upstreamModel"`
 	AuthRequired  *bool  `yaml:"authRequired"`
 }
 // rawAdapter represents a service adapter in the YAML configuration.
 type rawAdapter struct {
 	ServiceName string `yaml:"serviceName"`
 	Upstream    struct {
 		URL            string `yaml:"url"`
 		TimeoutSeconds int32  `yaml:"timeoutSeconds"`
 	} `yaml:"upstream"`
 	Auth struct {
 		Required   bool   `yaml:"required"`
 		Capability string `yaml:"capability"`
 	} `yaml:"auth"`
 	Retryable bool `yaml:"retryable"`
 	Resources []struct {
 		Name    string `yaml:"name"`
 		Methods []struct {
 			Verb           string `yaml:"verb"`
 			UpstreamPath   string `yaml:"upstreamPath"`
 			RequestSchema  string `yaml:"requestSchema"`
 			ResponseSchema string `yaml:"responseSchema"`
 		} `yaml:"methods"`
 	} `yaml:"resources"`
 }
 // rawUpstream represents upstream configuration in YAML.
@@ -39,32 +79,32 @@ type rawUpstream struct {
 	AuthRequired   *bool  `yaml:"authRequired"`
 }
-// LoadRoutesAndModelsFromFile loads both route and model configuration from a YAML file.
+// LoadRoutesAndModelsFromFile loads route, model, adapter, and auth configuration from a YAML file.
-func LoadRoutesAndModelsFromFile(path string) (map[string]*Route, map[string]*ModelUpstream, error) {
+func LoadRoutesAndModelsFromFile(path string) (map[string]*Route, map[string]*ModelUpstream, []*serviceadapter.ServiceAdapter, AuthConfig, error) {
 	data, err := os.ReadFile(path)
 	if err != nil {
-		return nil, nil, fmt.Errorf("failed to read config file %q: %w", path, err)
+		return nil, nil, nil, AuthConfig{}, fmt.Errorf("failed to read config file %q: %w", path, err)
 	}
 	var raw rawConfig
 	if err := yaml.Unmarshal(data, &raw); err != nil {
-		return nil, nil, fmt.Errorf("failed to parse config file %q: %w", path, err)
+		return nil, nil, nil, AuthConfig{}, fmt.Errorf("failed to parse config file %q: %w", path, err)
 	}
 	// Load routes
 	routes := make(map[string]*Route)
 	for _, rawRoute := range raw.Routes {
 		if rawRoute.Name == "" {
-			return nil, nil, fmt.Errorf("route has empty name")
+			return nil, nil, nil, AuthConfig{}, fmt.Errorf("route has empty name")
 		}
 		if _, exists := routes[rawRoute.Name]; exists {
-			return nil, nil, fmt.Errorf("duplicate route: \"%s\"", rawRoute.Name)
+			return nil, nil, nil, AuthConfig{}, fmt.Errorf("duplicate route: \"%s\"", rawRoute.Name)
 		}
 		upstream, err := parseUpstream(rawRoute.Name, rawRoute.Upstream)
 		if err != nil {
-			return nil, nil, err
+			return nil, nil, nil, AuthConfig{}, err
 		}
 		routes[rawRoute.Name] = &Route{
@@ -76,42 +116,91 @@ func LoadRoutesAndModelsFromFile(path string) (map[string]*Route, map[string]*Mo
 	// Load models
 	models := make(map[string]*ModelUpstream)
 	for _, rawModel := range raw.Models {
 		// Validate model name is not empty
 		if rawModel.Name == "" {
-			return nil, nil, fmt.Errorf("model has empty name")
+			return nil, nil, nil, AuthConfig{}, fmt.Errorf("model has empty name")
 		}
 		// Check for duplicate model names
 		if _, exists := models[rawModel.Name]; exists {
-			return nil, nil, fmt.Errorf("duplicate model: \"%s\"", rawModel.Name)
+			return nil, nil, nil, AuthConfig{}, fmt.Errorf("duplicate model: \"%s\"", rawModel.Name)
 		}
-
+		// Support both 'address' (single) and 'addresses' (multi-backend) YAML fields.
-		// Validate address is not empty
+		addresses := rawModel.Addresses
-		if rawModel.Address == "" {
+		if len(addresses) == 0 && rawModel.Address != "" {
-			return nil, nil, fmt.Errorf("model \"%s\": field 'address' is required", rawModel.Name)
+			addresses = []string{rawModel.Address}
 		}
-
+		if len(addresses) == 0 {
-		// Validate address format (host:port)
+			return nil, nil, nil, AuthConfig{}, fmt.Errorf("model \"%s\": 'address' or 'addresses' is required", rawModel.Name)
-		if _, _, err := net.SplitHostPort(rawModel.Address); err != nil {
+		}
-			return nil, nil, fmt.Errorf("model \"%s\": invalid address \"%s\": %w", rawModel.Name, rawModel.Address, err)
+		for _, addr := range addresses {
 			if _, _, err := net.SplitHostPort(addr); err != nil {
 				return nil, nil, nil, AuthConfig{}, fmt.Errorf("model \"%s\": invalid address \"%s\": %w", rawModel.Name, addr, err)
 			}
 		}
 		// Default authRequired to global auth.enabled if not specified per-model
 		authRequired := false
 		if rawModel.AuthRequired != nil {
 			authRequired = *rawModel.AuthRequired
 		}
 		models[rawModel.Name] = &ModelUpstream{
-			Name:    rawModel.Name,
+			Name:          rawModel.Name,
-			Address: rawModel.Address,
+			Address:       addresses[0],
-			Path:    rawModel.Path,
+			Addresses:     addresses,
 			Path:          rawModel.Path,
 			UpstreamModel: rawModel.UpstreamModel,
 			AuthRequired:  authRequired,
 		}
 	}
-	return routes, models, nil
+	// Load adapters
 	adapters := make([]*serviceadapter.ServiceAdapter, 0, len(raw.Adapters))
 	for _, ra := range raw.Adapters {
 		if ra.ServiceName == "" {
 			return nil, nil, nil, AuthConfig{}, fmt.Errorf("adapter has empty serviceName")
 		}
 		a := &serviceadapter.ServiceAdapter{
 			Name:        ra.ServiceName,
 			ServiceName: ra.ServiceName,
 			CreatedAt:   time.Now(),
 		}
 		a.Spec.ServiceName = ra.ServiceName
 		a.Spec.Upstream.URL = ra.Upstream.URL
 		a.Spec.Upstream.TimeoutSeconds = ra.Upstream.TimeoutSeconds
 		a.Spec.Auth.Required = ra.Auth.Required
 		a.Spec.Auth.Capability = ra.Auth.Capability
 		a.Spec.Retryable = ra.Retryable
 		for _, rr := range ra.Resources {
 			res := serviceadapter.Resource{Name: rr.Name}
 			for _, rm := range rr.Methods {
 				res.Methods = append(res.Methods, serviceadapter.Method{
 					Verb:           rm.Verb,
 					UpstreamPath:   rm.UpstreamPath,
 					RequestSchema:  rm.RequestSchema,
 					ResponseSchema: rm.ResponseSchema,
 				})
 			}
 			a.Spec.Resources = append(a.Spec.Resources, res)
 		}
 		adapters = append(adapters, a)
 	}
 	// Parse auth config
 	authConfig := AuthConfig{
 		Enabled:            raw.Auth.Enabled,
 		Issuer:             raw.Auth.Issuer,
 		Audience:           raw.Auth.Audience,
 		JWKSURL:            raw.Auth.JWKSURL,
 		RequiredCapability: raw.Auth.RequiredCapability,
 		TokenURL:           raw.Auth.TokenURL,
 		ClientID:           raw.Auth.ClientID,
 		ClientSecret:       os.Getenv("AUTH_CLIENT_SECRET"),
 	}
 	return routes, models, adapters, authConfig, nil
 }
 // LoadRoutesFromFile loads route configuration from a YAML file.
 // It validates that all required fields are present and have valid values.
 // Returns an error if the configuration is invalid.
 // Deprecated: Use LoadRoutesAndModelsFromFile instead.
 func LoadRoutesFromFile(path string) (map[string]*Route, error) {
-	routes, _, err := LoadRoutesAndModelsFromFile(path)
+	routes, _, _, _, err := LoadRoutesAndModelsFromFile(path)
 	return routes, err
 }
@@ -35,7 +35,7 @@ models:
 	tmpFile.WriteString(data)
 	tmpFile.Close()
-	_, models, err := LoadRoutesAndModelsFromFile(tmpFile.Name())
+	_, models, _, _, err := LoadRoutesAndModelsFromFile(tmpFile.Name())
 	if err != nil {
 		t.Fatalf("failed to load config: %v", err)
 	}
@@ -94,7 +94,7 @@ models:
 	tmpFile.WriteString(data)
 	tmpFile.Close()
-	_, _, err := LoadRoutesAndModelsFromFile(tmpFile.Name())
+	_, _, _, _, err := LoadRoutesAndModelsFromFile(tmpFile.Name())
 	if err == nil {
 		t.Errorf("expected error for duplicate model name, got nil")
 	}
@@ -127,7 +127,7 @@ models:
 	tmpFile.WriteString(data)
 	tmpFile.Close()
-	_, _, err := LoadRoutesAndModelsFromFile(tmpFile.Name())
+	_, _, _, _, err := LoadRoutesAndModelsFromFile(tmpFile.Name())
 	if err == nil {
 		t.Errorf("expected error for empty model name, got nil")
 	}
@@ -157,11 +157,11 @@ models:
 	tmpFile.WriteString(data)
 	tmpFile.Close()
-	_, _, err := LoadRoutesAndModelsFromFile(tmpFile.Name())
+	_, _, _, _, err := LoadRoutesAndModelsFromFile(tmpFile.Name())
 	if err == nil {
 		t.Errorf("expected error for missing address, got nil")
 	}
-	if err.Error() != "model \"reasoning\": field 'address' is required" {
+	if err.Error() != "model \"reasoning\": 'address' or 'addresses' is required" {
 		t.Errorf("expected missing address error, got: %v", err)
 	}
 }
@@ -190,7 +190,7 @@ models:
 	tmpFile.WriteString(data)
 	tmpFile.Close()
-	_, _, err := LoadRoutesAndModelsFromFile(tmpFile.Name())
+	_, _, _, _, err := LoadRoutesAndModelsFromFile(tmpFile.Name())
 	if err == nil {
 		t.Errorf("expected error for invalid address, got nil")
 	}
@@ -219,7 +219,7 @@ models:
 	tmpFile.WriteString(data)
 	tmpFile.Close()
-	_, models, err := LoadRoutesAndModelsFromFile(tmpFile.Name())
+	_, models, _, _, err := LoadRoutesAndModelsFromFile(tmpFile.Name())
 	if err != nil {
 		t.Fatalf("failed to load config: %v", err)
 	}
@@ -261,7 +261,7 @@ models:
 	tmpFile.WriteString(data)
 	tmpFile.Close()
-	routes, models, err := LoadRoutesAndModelsFromFile(tmpFile.Name())
+	routes, models, _, _, err := LoadRoutesAndModelsFromFile(tmpFile.Name())
 	if err != nil {
 		t.Fatalf("failed to load config: %v", err)
 	}
@@ -283,3 +283,139 @@ models:
 		t.Errorf("expected different ModelUpstream objects even for same address")
 	}
 }
 // minimalRouteYAML is a valid routes block required by LoadRoutesAndModelsFromFile.
 const minimalRouteYAML = `
 routes:
  - name: test-route
    upstream:
      address: "localhost:8000"
      pathRewrite: ""
      connectTimeout: "10s"
      readTimeout: "30s"
      writeTimeout: "30s"
      maxBodySize: 1048576
      authRequired: false
 `
 // TestLoadModelsAddressesField verifies address / addresses YAML field handling.
 func TestLoadModelsAddressesField(t *testing.T) {
 	tests := []struct {
 		name          string
 		modelsYAML    string
 		wantErr       bool
 		errContains   string
 		wantAddresses []string
 		wantAddress   string
 	}{
 		{
 			name: "single address field",
 			modelsYAML: `
 models:
  - name: "mymodel"
    address: "host:8080"
    path: "/v1/chat"
 `,
 			wantErr:       false,
 			wantAddresses: []string{"host:8080"},
 			wantAddress:   "host:8080",
 		},
 		{
 			name: "multi addresses field",
 			modelsYAML: `
 models:
  - name: "mymodel"
    addresses:
      - "a:80"
      - "b:80"
    path: "/v1/chat"
 `,
 			wantErr:       false,
 			wantAddresses: []string{"a:80", "b:80"},
 			wantAddress:   "a:80",
 		},
 		{
 			name: "neither field",
 			modelsYAML: `
 models:
  - name: "mymodel"
    path: "/v1/chat"
 `,
 			wantErr:     true,
 			errContains: "mymodel",
 		},
 		{
 			name: "invalid address format",
 			modelsYAML: `
 models:
  - name: "mymodel"
    address: "notavalidhostport"
    path: "/v1/chat"
 `,
 			wantErr:     true,
 			errContains: "mymodel",
 		},
 	}
 	for _, tc := range tests {
 		t.Run(tc.name, func(t *testing.T) {
 			data := minimalRouteYAML + tc.modelsYAML
 			tmpFile, err := os.CreateTemp("", "config-*.yaml")
 			if err != nil {
 				t.Fatalf("CreateTemp: %v", err)
 			}
 			defer os.Remove(tmpFile.Name())
 			tmpFile.WriteString(data)
 			tmpFile.Close()
 			_, models, _, _, loadErr := LoadRoutesAndModelsFromFile(tmpFile.Name())
 			if tc.wantErr {
 				if loadErr == nil {
 					t.Fatalf("expected error, got nil")
 				}
 				if tc.errContains != "" && !containsStr(loadErr.Error(), tc.errContains) {
 					t.Errorf("error %q does not contain %q", loadErr.Error(), tc.errContains)
 				}
 				return
 			}
 			if loadErr != nil {
 				t.Fatalf("unexpected error: %v", loadErr)
 			}
 			m, ok := models["mymodel"]
 			if !ok {
 				t.Fatalf("model 'mymodel' not found in result")
 			}
 			if m.Address != tc.wantAddress {
 				t.Errorf("Address: want %q, got %q", tc.wantAddress, m.Address)
 			}
 			if len(m.Addresses) != len(tc.wantAddresses) {
 				t.Errorf("Addresses len: want %d, got %d (%v)", len(tc.wantAddresses), len(m.Addresses), m.Addresses)
 			} else {
 				for i, a := range tc.wantAddresses {
 					if m.Addresses[i] != a {
 						t.Errorf("Addresses[%d]: want %q, got %q", i, a, m.Addresses[i])
 					}
 				}
 			}
 		})
 	}
 }
 // containsStr is a helper to avoid importing strings just for Contains.
 func containsStr(s, sub string) bool {
 	return len(s) >= len(sub) && (s == sub || len(sub) == 0 ||
 		func() bool {
 			for i := 0; i <= len(s)-len(sub); i++ {
 				if s[i:i+len(sub)] == sub {
 					return true
 				}
 			}
 			return false
 		}())
 }
@@ -0,0 +1,111 @@
 // Package identity extracts authenticated user identity from JWT claims
 // and injects forwarding headers into proxied requests.
 //
 // Headers injected after JWT validation:
 //
 //	X-Forwarded-User:    subject (sub claim)
 //	X-Forwarded-Roles:   comma-separated roles or permissions
 //	X-Acting-Service:    authorized party (azp claim), only for service accounts
 //	X-Auth-Verified:     "true" when gateway validated the JWT
 //
 // Security contract: downstream services MUST only accept traffic from the
 // gateway (enforced by NetworkPolicy). They trust these headers because the
 // gateway is the sole ingress path.
 package identity
 import (
 	"net/http"
 	"strings"
 	"github.com/golang-jwt/jwt/v5"
 )
 // Headers that the gateway controls. Incoming values from clients are
 // stripped to prevent spoofing.
 const (
 	HeaderUser         = "X-Forwarded-User"
 	HeaderRoles        = "X-Forwarded-Roles"
 	HeaderActingService = "X-Acting-Service"
 	HeaderAuthVerified = "X-Auth-Verified"
 )
 // managed lists all headers this package owns. Used for stripping and cleanup.
 var managed = []string{
 	HeaderUser,
 	HeaderRoles,
 	HeaderActingService,
 	HeaderAuthVerified,
 }
 // StripIncoming removes all gateway-managed identity headers from an
 // inbound request, preventing clients from spoofing identity.
 // Call this early in the handler chain, before any routing.
 func StripIncoming(r *http.Request) {
 	for _, h := range managed {
 		r.Header.Del(h)
 	}
 }
 // Inject extracts identity from validated JWT claims and sets the
 // corresponding forwarding headers on the request. Only call this
 // after successful JWT validation.
 func Inject(r *http.Request, claims jwt.MapClaims) {
 	r.Header.Set(HeaderAuthVerified, "true")
 	if sub := claimString(claims, "sub"); sub != "" {
 		r.Header.Set(HeaderUser, sub)
 	}
 	if roles := claimStringSlice(claims, "roles"); len(roles) > 0 {
 		r.Header.Set(HeaderRoles, strings.Join(roles, ","))
 	} else if perms := claimStringSlice(claims, "permissions"); len(perms) > 0 {
 		r.Header.Set(HeaderRoles, strings.Join(perms, ","))
 	}
 	if azp := claimString(claims, "azp"); azp != "" {
 		sub := claimString(claims, "sub")
 		// Only set acting-service when azp differs from sub
 		// (i.e., a service account acting, not the user themselves)
 		if azp != sub {
 			r.Header.Set(HeaderActingService, azp)
 		}
 	}
 }
 // claimString extracts a string value from claims, returning "" if
 // the key is missing or not a string.
 func claimString(claims jwt.MapClaims, key string) string {
 	val, ok := claims[key]
 	if !ok || val == nil {
 		return ""
 	}
 	s, ok := val.(string)
 	if !ok {
 		return ""
 	}
 	return s
 }
 // claimStringSlice extracts a []string from claims. JWT libraries
 // deserialize JSON arrays as []interface{}, so each element is
 // type-asserted individually. Non-string elements are skipped.
 func claimStringSlice(claims jwt.MapClaims, key string) []string {
 	val, ok := claims[key]
 	if !ok || val == nil {
 		return nil
 	}
 	raw, ok := val.([]interface{})
 	if !ok {
 		return nil
 	}
 	out := make([]string, 0, len(raw))
 	for _, v := range raw {
 		if s, ok := v.(string); ok && s != "" {
 			out = append(out, s)
 		}
 	}
 	if len(out) == 0 {
 		return nil
 	}
 	return out
 }
@@ -0,0 +1,205 @@
 package identity
 import (
 	"net/http"
 	"net/http/httptest"
 	"testing"
 	"github.com/golang-jwt/jwt/v5"
 )
 func TestStripIncoming_RemovesSpoofedHeaders(t *testing.T) {
 	r := httptest.NewRequest("GET", "/", nil)
 	r.Header.Set(HeaderUser, "evil-spoof")
 	r.Header.Set(HeaderRoles, "admin:*")
 	r.Header.Set(HeaderActingService, "fake-service")
 	r.Header.Set(HeaderAuthVerified, "true")
 	StripIncoming(r)
 	for _, h := range managed {
 		if got := r.Header.Get(h); got != "" {
 			t.Errorf("header %s should be stripped, got %q", h, got)
 		}
 	}
 }
 func TestStripIncoming_PreservesOtherHeaders(t *testing.T) {
 	r := httptest.NewRequest("GET", "/", nil)
 	r.Header.Set("Authorization", "Bearer token")
 	r.Header.Set("Content-Type", "application/json")
 	r.Header.Set(HeaderUser, "spoof")
 	StripIncoming(r)
 	if got := r.Header.Get("Authorization"); got != "Bearer token" {
 		t.Errorf("Authorization should be preserved, got %q", got)
 	}
 	if got := r.Header.Get("Content-Type"); got != "application/json" {
 		t.Errorf("Content-Type should be preserved, got %q", got)
 	}
 }
 func TestInject_ServiceAccount(t *testing.T) {
 	r := httptest.NewRequest("GET", "/", nil)
 	claims := jwt.MapClaims{
 		"sub":   "abc123-hashed-id",
 		"azp":   "portfolio-agent",
 		"roles": []interface{}{"llm:inference", "memory:read"},
 	}
 	Inject(r, claims)
 	assertHeader(t, r, HeaderAuthVerified, "true")
 	assertHeader(t, r, HeaderUser, "abc123-hashed-id")
 	assertHeader(t, r, HeaderRoles, "llm:inference,memory:read")
 	assertHeader(t, r, HeaderActingService, "portfolio-agent")
 }
 func TestInject_HumanUser(t *testing.T) {
 	r := httptest.NewRequest("GET", "/", nil)
 	claims := jwt.MapClaims{
 		"sub":         "user-hash-456",
 		"azp":         "api-gw",
 		"permissions": []interface{}{"*"},
 	}
 	Inject(r, claims)
 	assertHeader(t, r, HeaderAuthVerified, "true")
 	assertHeader(t, r, HeaderUser, "user-hash-456")
 	assertHeader(t, r, HeaderRoles, "*")
 	// azp != sub, so acting-service is set
 	assertHeader(t, r, HeaderActingService, "api-gw")
 }
 func TestInject_SameSubAndAzp_NoActingService(t *testing.T) {
 	r := httptest.NewRequest("GET", "/", nil)
 	claims := jwt.MapClaims{
 		"sub":   "portfolio-agent",
 		"azp":   "portfolio-agent",
 		"roles": []interface{}{"llm:inference"},
 	}
 	Inject(r, claims)
 	assertHeader(t, r, HeaderActingService, "")
 }
 func TestInject_RolesOverPermissions(t *testing.T) {
 	r := httptest.NewRequest("GET", "/", nil)
 	claims := jwt.MapClaims{
 		"sub":         "user-1",
 		"roles":       []interface{}{"llm:inference"},
 		"permissions": []interface{}{"admin:*"},
 	}
 	Inject(r, claims)
 	// roles takes precedence over permissions
 	assertHeader(t, r, HeaderRoles, "llm:inference")
 }
 func TestInject_PermissionsFallback(t *testing.T) {
 	r := httptest.NewRequest("GET", "/", nil)
 	claims := jwt.MapClaims{
 		"sub":         "user-1",
 		"permissions": []interface{}{"grafana:read", "grafana:write"},
 	}
 	Inject(r, claims)
 	assertHeader(t, r, HeaderRoles, "grafana:read,grafana:write")
 }
 func TestInject_EmptyClaims(t *testing.T) {
 	r := httptest.NewRequest("GET", "/", nil)
 	claims := jwt.MapClaims{}
 	Inject(r, claims)
 	assertHeader(t, r, HeaderAuthVerified, "true")
 	assertHeader(t, r, HeaderUser, "")
 	assertHeader(t, r, HeaderRoles, "")
 	assertHeader(t, r, HeaderActingService, "")
 }
 func TestInject_NilValuesInClaims(t *testing.T) {
 	r := httptest.NewRequest("GET", "/", nil)
 	claims := jwt.MapClaims{
 		"sub":   nil,
 		"azp":   nil,
 		"roles": nil,
 	}
 	Inject(r, claims)
 	assertHeader(t, r, HeaderAuthVerified, "true")
 	assertHeader(t, r, HeaderUser, "")
 	assertHeader(t, r, HeaderRoles, "")
 }
 func TestInject_WildcardPermission(t *testing.T) {
 	r := httptest.NewRequest("GET", "/", nil)
 	claims := jwt.MapClaims{
 		"sub":         "admin-user",
 		"permissions": []interface{}{"*"},
 	}
 	Inject(r, claims)
 	// Wildcard passed as literal, never expanded
 	assertHeader(t, r, HeaderRoles, "*")
 }
 func TestInject_MixedTypeRolesArray(t *testing.T) {
 	r := httptest.NewRequest("GET", "/", nil)
 	claims := jwt.MapClaims{
 		"sub":   "user-1",
 		"roles": []interface{}{"llm:inference", 42, nil, "", "memory:read"},
 	}
 	Inject(r, claims)
 	// Non-string and empty elements skipped
 	assertHeader(t, r, HeaderRoles, "llm:inference,memory:read")
 }
 func TestInject_EmptyRolesArray(t *testing.T) {
 	r := httptest.NewRequest("GET", "/", nil)
 	claims := jwt.MapClaims{
 		"sub":         "user-1",
 		"roles":       []interface{}{},
 		"permissions": []interface{}{"backup:read"},
 	}
 	Inject(r, claims)
 	// Empty roles falls through to permissions
 	assertHeader(t, r, HeaderRoles, "backup:read")
 }
 func TestStripThenInject_OverwritesSpoof(t *testing.T) {
 	r := httptest.NewRequest("GET", "/", nil)
 	r.Header.Set(HeaderUser, "evil-spoof")
 	r.Header.Set(HeaderAuthVerified, "true")
 	StripIncoming(r)
 	claims := jwt.MapClaims{
 		"sub":   "real-user",
 		"roles": []interface{}{"llm:inference"},
 	}
 	Inject(r, claims)
 	assertHeader(t, r, HeaderUser, "real-user")
 	assertHeader(t, r, HeaderAuthVerified, "true")
 }
 func assertHeader(t *testing.T, r *http.Request, key, want string) {
 	t.Helper()
 	got := r.Header.Get(key)
 	if got != want {
 		t.Errorf("header %s = %q, want %q", key, got, want)
 	}
 }
@@ -0,0 +1,299 @@
 //go:build integration
 package integration
 import (
 	"bytes"
 	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
 	"testing"
 	"time"
 )
 const (
 	gatewayBaseURL = "http://api-gateway:8080"
 	timeout        = 30 * time.Second
 )
 // TestIntegrationMemoryService tests memory adapter (ingest, query)
 func TestIntegrationMemoryService(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skipping integration test")
 	}
 	client := &http.Client{Timeout: timeout}
 	// Test 1: Ingest memory
 	t.Log("Testing memory ingest...")
 	ingestPayload := map[string]interface{}{
 		"ingest_id": "test-ingest-" + fmt.Sprintf("%d", time.Now().Unix()),
 		"project":   "test-project",
 		"title":     "Integration Test Memory",
 		"content":   "This is a test memory entry from integration test",
 		"tags":      []string{"integration", "test"},
 		"source":    "integration-test",
 	}
 	ingestBody, _ := json.Marshal(ingestPayload)
 	req, _ := http.NewRequest("POST", gatewayBaseURL+"/memory/ingest", bytes.NewReader(ingestBody))
 	req.Header.Set("X-Service", "memory")
 	req.Header.Set("X-Resource", "ingest")
 	req.Header.Set("Content-Type", "application/json")
 	resp, err := client.Do(req)
 	if err != nil {
 		t.Fatalf("memory ingest request failed: %v", err)
 	}
 	defer resp.Body.Close()
 	body, _ := io.ReadAll(resp.Body)
 	t.Logf("Ingest response: %d - %s", resp.StatusCode, string(body))
 	if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusCreated {
 		t.Fatalf("memory ingest failed with status %d", resp.StatusCode)
 	}
 	t.Log("✓ Memory ingest successful")
 	// Test 2: Query memory
 	t.Log("Testing memory query...")
 	queryPayload := map[string]interface{}{
 		"query": "integration test",
 	}
 	queryBody, _ := json.Marshal(queryPayload)
 	req, _ = http.NewRequest("POST", gatewayBaseURL+"/memory/query", bytes.NewReader(queryBody))
 	req.Header.Set("X-Service", "memory")
 	req.Header.Set("X-Resource", "query")
 	req.Header.Set("Content-Type", "application/json")
 	resp, err = client.Do(req)
 	if err != nil {
 		t.Fatalf("memory query request failed: %v", err)
 	}
 	defer resp.Body.Close()
 	body, _ = io.ReadAll(resp.Body)
 	t.Logf("Query response: %d - %s", resp.StatusCode, string(body))
 	if resp.StatusCode != http.StatusOK {
 		t.Fatalf("memory query failed with status %d", resp.StatusCode)
 	}
 	t.Log("✓ Memory query successful")
 }
 // TestIntegrationS3Service tests S3 adapter (list, put, get)
 func TestIntegrationS3Service(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skipping integration test")
 	}
 	client := &http.Client{Timeout: timeout}
 	// Test 1: List objects
 	t.Log("Testing S3 list objects...")
 	req, _ := http.NewRequest("GET", gatewayBaseURL+"/", nil)
 	req.Header.Set("X-Service", "s3")
 	req.Header.Set("X-Resource", "list-objects")
 	resp, err := client.Do(req)
 	if err != nil {
 		t.Fatalf("S3 list request failed: %v", err)
 	}
 	defer resp.Body.Close()
 	body, _ := io.ReadAll(resp.Body)
 	t.Logf("List response: %d - %s", resp.StatusCode, string(body)[:100])
 	// S3 should respond with either 200 (list) or 403 (access denied) - both mean routing works
 	if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusForbidden {
 		t.Fatalf("S3 list failed with unexpected status %d", resp.StatusCode)
 	}
 	t.Log("✓ S3 list objects successful")
 	// Test 2: Put object to dedicated test bucket
 	t.Log("Testing S3 put object...")
 	testContent := fmt.Sprintf("Integration test data - %d", time.Now().Unix())
 	testKey := "test-file-" + fmt.Sprintf("%d", time.Now().Unix()) + ".txt"
 	req, _ = http.NewRequest("PUT", gatewayBaseURL+"/"+testKey, bytes.NewReader([]byte(testContent)))
 	req.Header.Set("X-Service", "s3")
 	req.Header.Set("X-Resource", "put-object")
 	req.Header.Set("Content-Type", "text/plain")
 	resp, err = client.Do(req)
 	if err != nil {
 		t.Fatalf("S3 put request failed: %v", err)
 	}
 	defer resp.Body.Close()
 	body, _ = io.ReadAll(resp.Body)
 	t.Logf("Put response: %d - %s", resp.StatusCode, string(body)[:100])
 	// Put should respond - either success or S3 error (both mean routing works)
 	if resp.StatusCode < 200 || resp.StatusCode >= 600 {
 		t.Fatalf("S3 put failed with status %d", resp.StatusCode)
 	}
 	t.Log("✓ S3 put object successful")
 }
 // TestIntegrationSQSService tests SQS adapter (create queue, send, receive)
 func TestIntegrationSQSService(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skipping integration test")
 	}
 	client := &http.Client{Timeout: timeout}
 	// Test 1: List queues (no auth required in test, auth error is ok)
 	t.Log("Testing SQS list queues...")
 	req, _ := http.NewRequest("GET", gatewayBaseURL+"/sqs/queues", nil)
 	req.Header.Set("X-Service", "sqs")
 	req.Header.Set("X-Resource", "list-queues")
 	resp, err := client.Do(req)
 	if err != nil {
 		t.Fatalf("SQS list request failed: %v", err)
 	}
 	defer resp.Body.Close()
 	body, _ := io.ReadAll(resp.Body)
 	t.Logf("List queues response: %d - %s", resp.StatusCode, string(body))
 	// SQS requires auth, so 401 is expected but proves routing works
 	if resp.StatusCode == http.StatusUnauthorized {
 		t.Log("✓ SQS correctly requires authorization (routing works)")
 		return
 	}
 	if resp.StatusCode == http.StatusOK {
 		t.Log("✓ SQS list queues successful")
 		return
 	}
 	t.Fatalf("SQS list failed with unexpected status %d", resp.StatusCode)
 }
 // TestIntegrationWorkflowService tests workflow adapter (list, describe)
 func TestIntegrationWorkflowService(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skipping integration test")
 	}
 	client := &http.Client{Timeout: timeout}
 	// Test 1: List workflows with gRPC
 	t.Log("Testing workflow list (gRPC)...")
 	req, _ := http.NewRequest("GET", 
 		gatewayBaseURL+"/temporal.api.workflowservice.v1.WorkflowService/ListWorkflowExecutions", 
 		nil)
 	req.Header.Set("X-Service", "workflow")
 	req.Header.Set("X-Resource", "list")
 	req.Header.Set("Content-Type", "application/grpc")
 	req.Header.Set("TE", "trailers")
 	resp, err := client.Do(req)
 	if err != nil {
 		t.Fatalf("workflow list request failed: %v", err)
 	}
 	defer resp.Body.Close()
 	body, _ := io.ReadAll(resp.Body)
 	// gRPC responses are binary, but we can check status code
 	t.Logf("List workflows response: %d (body length: %d bytes)", resp.StatusCode, len(body))
 	// Status 200 with gRPC binary data, or 501 if not yet implemented
 	if resp.StatusCode == http.StatusOK {
 		t.Log("✓ Workflow list successful (gRPC forwarding working)")
 		return
 	}
 	if resp.StatusCode == http.StatusNotImplemented {
 		t.Log("⚠ Workflow list: gRPC forwarding not yet implemented")
 		return
 	}
 	if resp.StatusCode >= 400 && resp.StatusCode < 500 {
 		// Client error might indicate routing works but request format issue
 		t.Logf("✓ Workflow adapter routing confirmed (status %d)", resp.StatusCode)
 		return
 	}
 	t.Fatalf("Workflow list failed with status %d", resp.StatusCode)
 }
 // TestIntegrationIAMService tests IAM adapter
 func TestIntegrationIAMService(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skipping integration test")
 	}
 	client := &http.Client{Timeout: timeout}
 	t.Log("Testing IAM list users...")
 	req, _ := http.NewRequest("GET", gatewayBaseURL+"/api/v3/users", nil)
 	req.Header.Set("X-Service", "iam")
 	req.Header.Set("X-Resource", "list-users")
 	resp, err := client.Do(req)
 	if err != nil {
 		t.Fatalf("IAM list request failed: %v", err)
 	}
 	defer resp.Body.Close()
 	_, _ = io.ReadAll(resp.Body)
 	t.Logf("IAM list users response: %d", resp.StatusCode)
 	// IAM (Authentik) should respond - 200, 404, or auth error all prove routing works
 	if resp.StatusCode >= 200 && resp.StatusCode < 600 {
 		t.Log("✓ IAM adapter routing successful")
 		return
 	}
 	t.Fatalf("IAM list failed with status %d", resp.StatusCode)
 }
 // TestIntegrationHealthChecks tests gateway health endpoints
 func TestIntegrationHealthChecks(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skipping integration test")
 	}
 	client := &http.Client{Timeout: timeout}
 	tests := []struct {
 		name     string
 		endpoint string
 	}{
 		{"liveness", "/healthz"},
 		{"readiness", "/readyz"},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			req, _ := http.NewRequest("GET", gatewayBaseURL+tt.endpoint, nil)
 			resp, err := client.Do(req)
 			if err != nil {
 				t.Fatalf("health check request failed: %v", err)
 			}
 			defer resp.Body.Close()
 			if resp.StatusCode != http.StatusOK {
 				t.Fatalf("health check failed with status %d", resp.StatusCode)
 			}
 			var health map[string]string
 			if err := json.NewDecoder(resp.Body).Decode(&health); err != nil {
 				t.Fatalf("failed to decode health response: %v", err)
 			}
 			t.Logf("✓ %s: %s", tt.name, health["status"])
 		})
 	}
 }
@@ -198,3 +198,11 @@ func FromContext(ctx context.Context) *Logger {
 func WithContext(ctx context.Context, l *Logger) context.Context {
 	return context.WithValue(ctx, "logger", l)
 }
 // Event emits arbitrary fields as a structured JSON line.
 // Use when field values include non-string types (numerics, floats).
 func Event(fields map[string]interface{}) {
 	ensure()
 	data, _ := json.Marshal(fields)
 	_, _ = global.out.Write(append(data, '\n'))
 }
@@ -0,0 +1,260 @@
 package notification
 import (
 	"bytes"
 	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
 	"time"
 )
 // GotifyClient is a CRUD client for the Gotify API.
 type GotifyClient struct {
 	baseURL    string
 	appToken   string // token for sending messages (application token)
 	clientToken string // token for reading/managing (client token)
 	httpClient *http.Client
 }
 // NewGotifyClient creates a Gotify API client.
 // appToken is used for sending messages.
 // clientToken is used for listing/deleting messages and managing applications.
 func NewGotifyClient(baseURL, appToken, clientToken string) *GotifyClient {
 	return &GotifyClient{
 		baseURL:     baseURL,
 		appToken:    appToken,
 		clientToken: clientToken,
 		httpClient: &http.Client{
 			Timeout: 10 * time.Second,
 		},
 	}
 }
 // --- Message Types ---
 // GotifyMessage represents a Gotify message.
 type GotifyMessage struct {
 	ID       int                    `json:"id,omitempty"`
 	AppID    int                    `json:"appid,omitempty"`
 	Title    string                 `json:"title"`
 	Message  string                 `json:"message"`
 	Priority int                    `json:"priority,omitempty"`
 	Date     string                 `json:"date,omitempty"`
 	Extras   map[string]interface{} `json:"extras,omitempty"`
 }
 // GotifyMessageList is a paginated list of messages.
 type GotifyMessageList struct {
 	Messages []GotifyMessage `json:"messages"`
 	Paging   GotifyPaging    `json:"paging"`
 }
 // GotifyPaging represents pagination info.
 type GotifyPaging struct {
 	Size  int    `json:"size"`
 	Since int    `json:"since"`
 	Limit int    `json:"limit"`
 	Next  string `json:"next,omitempty"`
 }
 // --- Application Types ---
 // GotifyApplication represents a Gotify application.
 type GotifyApplication struct {
 	ID          int    `json:"id,omitempty"`
 	Token       string `json:"token,omitempty"`
 	Name        string `json:"name"`
 	Description string `json:"description,omitempty"`
 	Image       string `json:"image,omitempty"`
 	Internal    bool   `json:"internal,omitempty"`
 }
 // --- Message CRUD ---
 // SendMessage sends a message via Gotify (uses app token).
 func (c *GotifyClient) SendMessage(msg GotifyMessage) (*GotifyMessage, error) {
 	body, err := json.Marshal(msg)
 	if err != nil {
 		return nil, fmt.Errorf("marshal message: %w", err)
 	}
 	req, err := http.NewRequest(http.MethodPost, c.baseURL+"/message", bytes.NewReader(body))
 	if err != nil {
 		return nil, fmt.Errorf("create request: %w", err)
 	}
 	req.Header.Set("Content-Type", "application/json")
 	req.Header.Set("X-Gotify-Key", c.appToken)
 	resp, err := c.httpClient.Do(req)
 	if err != nil {
 		return nil, fmt.Errorf("send message: %w", err)
 	}
 	defer resp.Body.Close()
 	if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusCreated {
 		return nil, c.readError(resp)
 	}
 	var result GotifyMessage
 	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
 		return nil, fmt.Errorf("decode response: %w", err)
 	}
 	return &result, nil
 }
 // ListMessages lists messages (uses client token).
 func (c *GotifyClient) ListMessages(limit int) (*GotifyMessageList, error) {
 	url := fmt.Sprintf("%s/message?limit=%d", c.baseURL, limit)
 	req, err := http.NewRequest(http.MethodGet, url, nil)
 	if err != nil {
 		return nil, fmt.Errorf("create request: %w", err)
 	}
 	req.Header.Set("X-Gotify-Key", c.clientToken)
 	resp, err := c.httpClient.Do(req)
 	if err != nil {
 		return nil, fmt.Errorf("list messages: %w", err)
 	}
 	defer resp.Body.Close()
 	if resp.StatusCode != http.StatusOK {
 		return nil, c.readError(resp)
 	}
 	var result GotifyMessageList
 	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
 		return nil, fmt.Errorf("decode response: %w", err)
 	}
 	return &result, nil
 }
 // DeleteMessage deletes a message by ID (uses client token).
 func (c *GotifyClient) DeleteMessage(id int) error {
 	url := fmt.Sprintf("%s/message/%d", c.baseURL, id)
 	req, err := http.NewRequest(http.MethodDelete, url, nil)
 	if err != nil {
 		return fmt.Errorf("create request: %w", err)
 	}
 	req.Header.Set("X-Gotify-Key", c.clientToken)
 	resp, err := c.httpClient.Do(req)
 	if err != nil {
 		return fmt.Errorf("delete message: %w", err)
 	}
 	defer resp.Body.Close()
 	if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusNoContent {
 		return c.readError(resp)
 	}
 	return nil
 }
 // DeleteAllMessages deletes all messages (uses client token).
 func (c *GotifyClient) DeleteAllMessages() error {
 	req, err := http.NewRequest(http.MethodDelete, c.baseURL+"/message", nil)
 	if err != nil {
 		return fmt.Errorf("create request: %w", err)
 	}
 	req.Header.Set("X-Gotify-Key", c.clientToken)
 	resp, err := c.httpClient.Do(req)
 	if err != nil {
 		return fmt.Errorf("delete all messages: %w", err)
 	}
 	defer resp.Body.Close()
 	if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusNoContent {
 		return c.readError(resp)
 	}
 	return nil
 }
 // --- Application CRUD ---
 // ListApplications lists all applications (uses client token).
 func (c *GotifyClient) ListApplications() ([]GotifyApplication, error) {
 	req, err := http.NewRequest(http.MethodGet, c.baseURL+"/application", nil)
 	if err != nil {
 		return nil, fmt.Errorf("create request: %w", err)
 	}
 	req.Header.Set("X-Gotify-Key", c.clientToken)
 	resp, err := c.httpClient.Do(req)
 	if err != nil {
 		return nil, fmt.Errorf("list applications: %w", err)
 	}
 	defer resp.Body.Close()
 	if resp.StatusCode != http.StatusOK {
 		return nil, c.readError(resp)
 	}
 	var result []GotifyApplication
 	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
 		return nil, fmt.Errorf("decode response: %w", err)
 	}
 	return result, nil
 }
 // CreateApplication creates a new application (uses client token).
 func (c *GotifyClient) CreateApplication(app GotifyApplication) (*GotifyApplication, error) {
 	body, err := json.Marshal(app)
 	if err != nil {
 		return nil, fmt.Errorf("marshal application: %w", err)
 	}
 	req, err := http.NewRequest(http.MethodPost, c.baseURL+"/application", bytes.NewReader(body))
 	if err != nil {
 		return nil, fmt.Errorf("create request: %w", err)
 	}
 	req.Header.Set("Content-Type", "application/json")
 	req.Header.Set("X-Gotify-Key", c.clientToken)
 	resp, err := c.httpClient.Do(req)
 	if err != nil {
 		return nil, fmt.Errorf("create application: %w", err)
 	}
 	defer resp.Body.Close()
 	if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusCreated {
 		return nil, c.readError(resp)
 	}
 	var result GotifyApplication
 	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
 		return nil, fmt.Errorf("decode response: %w", err)
 	}
 	return &result, nil
 }
 // DeleteApplication deletes an application by ID (uses client token).
 func (c *GotifyClient) DeleteApplication(id int) error {
 	url := fmt.Sprintf("%s/application/%d", c.baseURL, id)
 	req, err := http.NewRequest(http.MethodDelete, url, nil)
 	if err != nil {
 		return fmt.Errorf("create request: %w", err)
 	}
 	req.Header.Set("X-Gotify-Key", c.clientToken)
 	resp, err := c.httpClient.Do(req)
 	if err != nil {
 		return fmt.Errorf("delete application: %w", err)
 	}
 	defer resp.Body.Close()
 	if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusNoContent {
 		return c.readError(resp)
 	}
 	return nil
 }
 // --- Helpers ---
 func (c *GotifyClient) readError(resp *http.Response) error {
 	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return fmt.Errorf("gotify API error (HTTP %d): failed to read body: %w", resp.StatusCode, err)
 	}
 	return fmt.Errorf("gotify API error (HTTP %d): %s", resp.StatusCode, string(body))
 }
@@ -0,0 +1,291 @@
 package notification
 import (
 	"encoding/json"
 	"fmt"
 	"log"
 	"net/http"
 	"net/smtp"
 	"os"
 	"strconv"
 )
 // Handler handles notification requests routed via X-Resource header.
 // Supports: send-email, send-gotify, list-messages, delete-message,
 // delete-all-messages, list-applications, create-application, delete-application.
 type Handler struct {
 	smtpHost    string
 	smtpPort    string
 	smtpFrom    string
 	smtpUser    string
 	smtpPass    string
 	gotify      *GotifyClient
 }
 // NewHandler creates a notification handler from environment variables.
 func NewHandler() *Handler {
 	var gotify *GotifyClient
 	gotifyURL := os.Getenv("GOTIFY_URL")
 	if gotifyURL != "" {
 		gotify = NewGotifyClient(
 			gotifyURL,
 			os.Getenv("GOTIFY_APP_TOKEN"),
 			os.Getenv("GOTIFY_CLIENT_TOKEN"),
 		)
 	}
 	return &Handler{
 		smtpHost: os.Getenv("SMTP_HOST"),
 		smtpPort: os.Getenv("SMTP_PORT"),
 		smtpFrom: os.Getenv("SMTP_FROM"),
 		smtpUser: os.Getenv("SMTP_USER"),
 		smtpPass: os.Getenv("SMTP_PASS"),
 		gotify:   gotify,
 	}
 }
 // ServeHTTP routes requests by X-Upstream-Path (set by dispatcher after resource matching).
 func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	resource := r.Header.Get("X-Resource")
 	switch resource {
 	// --- Email ---
 	case "send-email":
 		h.handleSendEmail(w, r)
 	// --- Gotify Messages ---
 	case "send-message":
 		h.handleSendGotify(w, r)
 	case "list-messages":
 		h.handleListMessages(w, r)
 	case "delete-message":
 		h.handleDeleteMessage(w, r)
 	case "delete-all-messages":
 		h.handleDeleteAllMessages(w, r)
 	// --- Gotify Applications ---
 	case "list-applications":
 		h.handleListApplications(w, r)
 	case "create-application":
 		h.handleCreateApplication(w, r)
 	case "delete-application":
 		h.handleDeleteApplication(w, r)
 	default:
 		h.writeJSON(w, http.StatusNotFound, map[string]string{
 			"error": fmt.Sprintf("unknown resource: %s", resource),
 		})
 	}
 }
 // --- Email ---
 type SendEmailRequest struct {
 	To      string `json:"to"`
 	CC      string `json:"cc,omitempty"`
 	Subject string `json:"subject"`
 	Body    string `json:"body"`
 }
 func (h *Handler) handleSendEmail(w http.ResponseWriter, r *http.Request) {
 	var req SendEmailRequest
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
 		h.writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid request: " + err.Error()})
 		return
 	}
 	if req.To == "" {
 		h.writeJSON(w, http.StatusBadRequest, map[string]string{"error": "missing 'to' field"})
 		return
 	}
 	subject := req.Subject
 	if subject == "" {
 		subject = "Notification"
 	}
 	msg := fmt.Sprintf(
 		"From: %s\r\nTo: %s\r\nSubject: %s\r\nContent-Type: text/plain; charset=UTF-8\r\n\r\n%s",
 		h.smtpFrom, req.To, subject, req.Body,
 	)
 	smtpAddr := fmt.Sprintf("%s:%s", h.smtpHost, h.smtpPort)
 	auth := smtp.PlainAuth("", h.smtpUser, h.smtpPass, h.smtpHost)
 	if err := smtp.SendMail(smtpAddr, auth, h.smtpFrom, []string{req.To}, []byte(msg)); err != nil {
 		log.Printf("error sending email to %s: %v", req.To, err)
 		h.writeJSON(w, http.StatusInternalServerError, map[string]string{"error": "failed to send email: " + err.Error()})
 		return
 	}
 	h.writeJSON(w, http.StatusOK, map[string]string{
 		"status":    "success",
 		"messageId": fmt.Sprintf("email-%s", req.To),
 	})
 }
 // --- Gotify Messages ---
 func (h *Handler) handleSendGotify(w http.ResponseWriter, r *http.Request) {
 	if h.gotify == nil {
 		h.writeJSON(w, http.StatusServiceUnavailable, map[string]string{"error": "Gotify not configured"})
 		return
 	}
 	var msg GotifyMessage
 	if err := json.NewDecoder(r.Body).Decode(&msg); err != nil {
 		h.writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid request: " + err.Error()})
 		return
 	}
 	result, err := h.gotify.SendMessage(msg)
 	if err != nil {
 		log.Printf("error sending gotify message: %v", err)
 		h.writeJSON(w, http.StatusBadGateway, map[string]string{"error": err.Error()})
 		return
 	}
 	h.writeJSON(w, http.StatusOK, result)
 }
 func (h *Handler) handleListMessages(w http.ResponseWriter, r *http.Request) {
 	if h.gotify == nil {
 		h.writeJSON(w, http.StatusServiceUnavailable, map[string]string{"error": "Gotify not configured"})
 		return
 	}
 	limit := 50
 	if l := r.URL.Query().Get("limit"); l != "" {
 		if parsed, err := strconv.Atoi(l); err == nil && parsed > 0 {
 			limit = parsed
 		}
 	}
 	result, err := h.gotify.ListMessages(limit)
 	if err != nil {
 		log.Printf("error listing gotify messages: %v", err)
 		h.writeJSON(w, http.StatusBadGateway, map[string]string{"error": err.Error()})
 		return
 	}
 	h.writeJSON(w, http.StatusOK, result)
 }
 func (h *Handler) handleDeleteMessage(w http.ResponseWriter, r *http.Request) {
 	if h.gotify == nil {
 		h.writeJSON(w, http.StatusServiceUnavailable, map[string]string{"error": "Gotify not configured"})
 		return
 	}
 	var req struct {
 		ID int `json:"id"`
 	}
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
 		h.writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid request: " + err.Error()})
 		return
 	}
 	if req.ID == 0 {
 		h.writeJSON(w, http.StatusBadRequest, map[string]string{"error": "missing 'id' field"})
 		return
 	}
 	if err := h.gotify.DeleteMessage(req.ID); err != nil {
 		log.Printf("error deleting gotify message %d: %v", req.ID, err)
 		h.writeJSON(w, http.StatusBadGateway, map[string]string{"error": err.Error()})
 		return
 	}
 	h.writeJSON(w, http.StatusOK, map[string]string{"status": "deleted"})
 }
 func (h *Handler) handleDeleteAllMessages(w http.ResponseWriter, r *http.Request) {
 	if h.gotify == nil {
 		h.writeJSON(w, http.StatusServiceUnavailable, map[string]string{"error": "Gotify not configured"})
 		return
 	}
 	if err := h.gotify.DeleteAllMessages(); err != nil {
 		log.Printf("error deleting all gotify messages: %v", err)
 		h.writeJSON(w, http.StatusBadGateway, map[string]string{"error": err.Error()})
 		return
 	}
 	h.writeJSON(w, http.StatusOK, map[string]string{"status": "all messages deleted"})
 }
 // --- Gotify Applications ---
 func (h *Handler) handleListApplications(w http.ResponseWriter, r *http.Request) {
 	if h.gotify == nil {
 		h.writeJSON(w, http.StatusServiceUnavailable, map[string]string{"error": "Gotify not configured"})
 		return
 	}
 	result, err := h.gotify.ListApplications()
 	if err != nil {
 		log.Printf("error listing gotify applications: %v", err)
 		h.writeJSON(w, http.StatusBadGateway, map[string]string{"error": err.Error()})
 		return
 	}
 	h.writeJSON(w, http.StatusOK, result)
 }
 func (h *Handler) handleCreateApplication(w http.ResponseWriter, r *http.Request) {
 	if h.gotify == nil {
 		h.writeJSON(w, http.StatusServiceUnavailable, map[string]string{"error": "Gotify not configured"})
 		return
 	}
 	var app GotifyApplication
 	if err := json.NewDecoder(r.Body).Decode(&app); err != nil {
 		h.writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid request: " + err.Error()})
 		return
 	}
 	result, err := h.gotify.CreateApplication(app)
 	if err != nil {
 		log.Printf("error creating gotify application: %v", err)
 		h.writeJSON(w, http.StatusBadGateway, map[string]string{"error": err.Error()})
 		return
 	}
 	h.writeJSON(w, http.StatusCreated, result)
 }
 func (h *Handler) handleDeleteApplication(w http.ResponseWriter, r *http.Request) {
 	if h.gotify == nil {
 		h.writeJSON(w, http.StatusServiceUnavailable, map[string]string{"error": "Gotify not configured"})
 		return
 	}
 	var req struct {
 		ID int `json:"id"`
 	}
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
 		h.writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid request: " + err.Error()})
 		return
 	}
 	if req.ID == 0 {
 		h.writeJSON(w, http.StatusBadRequest, map[string]string{"error": "missing 'id' field"})
 		return
 	}
 	if err := h.gotify.DeleteApplication(req.ID); err != nil {
 		log.Printf("error deleting gotify application %d: %v", req.ID, err)
 		h.writeJSON(w, http.StatusBadGateway, map[string]string{"error": err.Error()})
 		return
 	}
 	h.writeJSON(w, http.StatusOK, map[string]string{"status": "deleted"})
 }
 // --- Helpers ---
 func (h *Handler) writeJSON(w http.ResponseWriter, status int, data interface{}) {
 	w.Header().Set("Content-Type", "application/json")
 	w.WriteHeader(status)
 	json.NewEncoder(w).Encode(data)
 }
@@ -0,0 +1,513 @@
 package notification
 import (
 	"bytes"
 	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
 	"net/http/httptest"
 	"testing"
 )
 // mockGotifyServer creates a test server that simulates the Gotify API.
 func mockGotifyServer() *httptest.Server {
 	mux := http.NewServeMux()
 	// POST /message — send message
 	mux.HandleFunc("/message", func(w http.ResponseWriter, r *http.Request) {
 		switch r.Method {
 		case http.MethodPost:
 			var msg GotifyMessage
 			if err := json.NewDecoder(r.Body).Decode(&msg); err != nil {
 				http.Error(w, "bad request", http.StatusBadRequest)
 				return
 			}
 			msg.ID = 42
 			msg.AppID = 1
 			w.Header().Set("Content-Type", "application/json")
 			json.NewEncoder(w).Encode(msg)
 		case http.MethodGet:
 			// list messages
 			w.Header().Set("Content-Type", "application/json")
 			json.NewEncoder(w).Encode(GotifyMessageList{
 				Messages: []GotifyMessage{
 					{ID: 1, Title: "Test", Message: "hello", Priority: 3},
 					{ID: 2, Title: "Alert", Message: "world", Priority: 7},
 				},
 				Paging: GotifyPaging{Size: 2, Limit: 50},
 			})
 		case http.MethodDelete:
 			// delete all messages
 			w.WriteHeader(http.StatusOK)
 			json.NewEncoder(w).Encode(map[string]string{"status": "ok"})
 		default:
 			http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
 		}
 	})
 	// DELETE /message/{id}
 	mux.HandleFunc("/message/", func(w http.ResponseWriter, r *http.Request) {
 		if r.Method != http.MethodDelete {
 			http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
 			return
 		}
 		w.WriteHeader(http.StatusOK)
 		json.NewEncoder(w).Encode(map[string]string{"status": "ok"})
 	})
 	// GET/POST/DELETE /application
 	mux.HandleFunc("/application", func(w http.ResponseWriter, r *http.Request) {
 		switch r.Method {
 		case http.MethodGet:
 			w.Header().Set("Content-Type", "application/json")
 			json.NewEncoder(w).Encode([]GotifyApplication{
 				{ID: 1, Name: "app1", Token: "tok1"},
 				{ID: 2, Name: "app2", Token: "tok2"},
 			})
 		case http.MethodPost:
 			var app GotifyApplication
 			if err := json.NewDecoder(r.Body).Decode(&app); err != nil {
 				http.Error(w, "bad request", http.StatusBadRequest)
 				return
 			}
 			app.ID = 10
 			app.Token = "new-token"
 			w.WriteHeader(http.StatusCreated)
 			w.Header().Set("Content-Type", "application/json")
 			json.NewEncoder(w).Encode(app)
 		default:
 			http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
 		}
 	})
 	// DELETE /application/{id}
 	mux.HandleFunc("/application/", func(w http.ResponseWriter, r *http.Request) {
 		if r.Method != http.MethodDelete {
 			http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
 			return
 		}
 		w.WriteHeader(http.StatusOK)
 		json.NewEncoder(w).Encode(map[string]string{"status": "ok"})
 	})
 	return httptest.NewServer(mux)
 }
 func newTestHandler(gotifyURL string) *Handler {
 	h := &Handler{}
 	if gotifyURL != "" {
 		h.gotify = NewGotifyClient(gotifyURL, "test-app-token", "test-client-token")
 	}
 	return h
 }
 func doRequest(h *Handler, method, resource string, body interface{}) *httptest.ResponseRecorder {
 	var reqBody io.Reader
 	if body != nil {
 		b, _ := json.Marshal(body)
 		reqBody = bytes.NewReader(b)
 	}
 	req := httptest.NewRequest(method, "/", reqBody)
 	req.Header.Set("X-Resource", resource)
 	if body != nil {
 		req.Header.Set("Content-Type", "application/json")
 	}
 	w := httptest.NewRecorder()
 	h.ServeHTTP(w, req)
 	return w
 }
 func decodeResponse(t *testing.T, w *httptest.ResponseRecorder) map[string]interface{} {
 	t.Helper()
 	var result map[string]interface{}
 	if err := json.Unmarshal(w.Body.Bytes(), &result); err != nil {
 		t.Fatalf("decode response: %v (body: %s)", err, w.Body.String())
 	}
 	return result
 }
 // ============================================================
 // Handler routing tests
 // ============================================================
 func TestHandler_UnknownResource(t *testing.T) {
 	h := newTestHandler("")
 	w := doRequest(h, "GET", "unknown-resource", nil)
 	if w.Code != http.StatusNotFound {
 		t.Errorf("expected 404, got %d", w.Code)
 	}
 	data := decodeResponse(t, w)
 	if _, ok := data["error"]; !ok {
 		t.Error("expected error in response")
 	}
 }
 func TestHandler_GotifyNotConfigured(t *testing.T) {
 	h := newTestHandler("") // no gotify
 	resources := []struct {
 		method   string
 		resource string
 		body     interface{}
 	}{
 		{"POST", "send-message", map[string]string{"title": "t", "message": "m"}},
 		{"GET", "list-messages", nil},
 		{"DELETE", "delete-message", map[string]int{"id": 1}},
 		{"DELETE", "delete-all-messages", nil},
 		{"GET", "list-applications", nil},
 		{"POST", "create-application", map[string]string{"name": "app"}},
 		{"DELETE", "delete-application", map[string]int{"id": 1}},
 	}
 	for _, tc := range resources {
 		t.Run(tc.resource, func(t *testing.T) {
 			w := doRequest(h, tc.method, tc.resource, tc.body)
 			if w.Code != http.StatusServiceUnavailable {
 				t.Errorf("expected 503, got %d", w.Code)
 			}
 		})
 	}
 }
 // ============================================================
 // Gotify message tests (via handler)
 // ============================================================
 func TestHandler_SendMessage(t *testing.T) {
 	srv := mockGotifyServer()
 	defer srv.Close()
 	h := newTestHandler(srv.URL)
 	w := doRequest(h, "POST", "send-message", map[string]interface{}{
 		"title":    "Test Alert",
 		"message":  "Something happened",
 		"priority": 5,
 	})
 	if w.Code != http.StatusOK {
 		t.Fatalf("expected 200, got %d: %s", w.Code, w.Body.String())
 	}
 	data := decodeResponse(t, w)
 	if data["title"] != "Test Alert" {
 		t.Errorf("expected title 'Test Alert', got %v", data["title"])
 	}
 	if int(data["id"].(float64)) != 42 {
 		t.Errorf("expected id 42, got %v", data["id"])
 	}
 }
 func TestHandler_SendMessage_InvalidJSON(t *testing.T) {
 	srv := mockGotifyServer()
 	defer srv.Close()
 	h := newTestHandler(srv.URL)
 	req := httptest.NewRequest("POST", "/", bytes.NewReader([]byte("not json")))
 	req.Header.Set("X-Resource", "send-message")
 	w := httptest.NewRecorder()
 	h.ServeHTTP(w, req)
 	if w.Code != http.StatusBadRequest {
 		t.Errorf("expected 400, got %d", w.Code)
 	}
 }
 func TestHandler_ListMessages(t *testing.T) {
 	srv := mockGotifyServer()
 	defer srv.Close()
 	h := newTestHandler(srv.URL)
 	w := doRequest(h, "GET", "list-messages", nil)
 	if w.Code != http.StatusOK {
 		t.Fatalf("expected 200, got %d: %s", w.Code, w.Body.String())
 	}
 	var result GotifyMessageList
 	if err := json.Unmarshal(w.Body.Bytes(), &result); err != nil {
 		t.Fatalf("decode: %v", err)
 	}
 	if len(result.Messages) != 2 {
 		t.Errorf("expected 2 messages, got %d", len(result.Messages))
 	}
 }
 func TestHandler_DeleteMessage(t *testing.T) {
 	srv := mockGotifyServer()
 	defer srv.Close()
 	h := newTestHandler(srv.URL)
 	w := doRequest(h, "DELETE", "delete-message", map[string]int{"id": 1})
 	if w.Code != http.StatusOK {
 		t.Fatalf("expected 200, got %d: %s", w.Code, w.Body.String())
 	}
 }
 func TestHandler_DeleteMessage_MissingID(t *testing.T) {
 	srv := mockGotifyServer()
 	defer srv.Close()
 	h := newTestHandler(srv.URL)
 	w := doRequest(h, "DELETE", "delete-message", map[string]int{"id": 0})
 	if w.Code != http.StatusBadRequest {
 		t.Errorf("expected 400, got %d", w.Code)
 	}
 }
 func TestHandler_DeleteAllMessages(t *testing.T) {
 	srv := mockGotifyServer()
 	defer srv.Close()
 	h := newTestHandler(srv.URL)
 	w := doRequest(h, "DELETE", "delete-all-messages", nil)
 	if w.Code != http.StatusOK {
 		t.Fatalf("expected 200, got %d: %s", w.Code, w.Body.String())
 	}
 }
 // ============================================================
 // Gotify application tests (via handler)
 // ============================================================
 func TestHandler_ListApplications(t *testing.T) {
 	srv := mockGotifyServer()
 	defer srv.Close()
 	h := newTestHandler(srv.URL)
 	w := doRequest(h, "GET", "list-applications", nil)
 	if w.Code != http.StatusOK {
 		t.Fatalf("expected 200, got %d: %s", w.Code, w.Body.String())
 	}
 	var apps []GotifyApplication
 	if err := json.Unmarshal(w.Body.Bytes(), &apps); err != nil {
 		t.Fatalf("decode: %v", err)
 	}
 	if len(apps) != 2 {
 		t.Errorf("expected 2 apps, got %d", len(apps))
 	}
 }
 func TestHandler_CreateApplication(t *testing.T) {
 	srv := mockGotifyServer()
 	defer srv.Close()
 	h := newTestHandler(srv.URL)
 	w := doRequest(h, "POST", "create-application", map[string]string{
 		"name":        "my-app",
 		"description": "test app",
 	})
 	if w.Code != http.StatusCreated {
 		t.Fatalf("expected 201, got %d: %s", w.Code, w.Body.String())
 	}
 	data := decodeResponse(t, w)
 	if data["name"] != "my-app" {
 		t.Errorf("expected name 'my-app', got %v", data["name"])
 	}
 }
 func TestHandler_DeleteApplication(t *testing.T) {
 	srv := mockGotifyServer()
 	defer srv.Close()
 	h := newTestHandler(srv.URL)
 	w := doRequest(h, "DELETE", "delete-application", map[string]int{"id": 1})
 	if w.Code != http.StatusOK {
 		t.Fatalf("expected 200, got %d: %s", w.Code, w.Body.String())
 	}
 }
 func TestHandler_DeleteApplication_MissingID(t *testing.T) {
 	srv := mockGotifyServer()
 	defer srv.Close()
 	h := newTestHandler(srv.URL)
 	w := doRequest(h, "DELETE", "delete-application", map[string]int{"id": 0})
 	if w.Code != http.StatusBadRequest {
 		t.Errorf("expected 400, got %d", w.Code)
 	}
 }
 // ============================================================
 // Email tests (routing only, no SMTP)
 // ============================================================
 func TestHandler_SendEmail_MissingTo(t *testing.T) {
 	h := newTestHandler("")
 	w := doRequest(h, "POST", "send-email", map[string]string{
 		"subject": "Test",
 		"body":    "Hello",
 	})
 	if w.Code != http.StatusBadRequest {
 		t.Errorf("expected 400, got %d", w.Code)
 	}
 }
 func TestHandler_SendEmail_InvalidJSON(t *testing.T) {
 	h := newTestHandler("")
 	req := httptest.NewRequest("POST", "/", bytes.NewReader([]byte("{bad")))
 	req.Header.Set("X-Resource", "send-email")
 	w := httptest.NewRecorder()
 	h.ServeHTTP(w, req)
 	if w.Code != http.StatusBadRequest {
 		t.Errorf("expected 400, got %d", w.Code)
 	}
 }
 // ============================================================
 // GotifyClient direct tests
 // ============================================================
 func TestGotifyClient_SendMessage(t *testing.T) {
 	srv := mockGotifyServer()
 	defer srv.Close()
 	client := NewGotifyClient(srv.URL, "app-token", "client-token")
 	msg, err := client.SendMessage(GotifyMessage{
 		Title:    "Direct Test",
 		Message:  "Hello",
 		Priority: 3,
 	})
 	if err != nil {
 		t.Fatalf("send: %v", err)
 	}
 	if msg.ID != 42 {
 		t.Errorf("expected id 42, got %d", msg.ID)
 	}
 	if msg.Title != "Direct Test" {
 		t.Errorf("expected title 'Direct Test', got %s", msg.Title)
 	}
 }
 func TestGotifyClient_ListMessages(t *testing.T) {
 	srv := mockGotifyServer()
 	defer srv.Close()
 	client := NewGotifyClient(srv.URL, "app-token", "client-token")
 	list, err := client.ListMessages(50)
 	if err != nil {
 		t.Fatalf("list: %v", err)
 	}
 	if len(list.Messages) != 2 {
 		t.Errorf("expected 2 messages, got %d", len(list.Messages))
 	}
 }
 func TestGotifyClient_DeleteMessage(t *testing.T) {
 	srv := mockGotifyServer()
 	defer srv.Close()
 	client := NewGotifyClient(srv.URL, "app-token", "client-token")
 	if err := client.DeleteMessage(1); err != nil {
 		t.Fatalf("delete: %v", err)
 	}
 }
 func TestGotifyClient_DeleteAllMessages(t *testing.T) {
 	srv := mockGotifyServer()
 	defer srv.Close()
 	client := NewGotifyClient(srv.URL, "app-token", "client-token")
 	if err := client.DeleteAllMessages(); err != nil {
 		t.Fatalf("delete all: %v", err)
 	}
 }
 func TestGotifyClient_ListApplications(t *testing.T) {
 	srv := mockGotifyServer()
 	defer srv.Close()
 	client := NewGotifyClient(srv.URL, "app-token", "client-token")
 	apps, err := client.ListApplications()
 	if err != nil {
 		t.Fatalf("list: %v", err)
 	}
 	if len(apps) != 2 {
 		t.Errorf("expected 2 apps, got %d", len(apps))
 	}
 }
 func TestGotifyClient_CreateApplication(t *testing.T) {
 	srv := mockGotifyServer()
 	defer srv.Close()
 	client := NewGotifyClient(srv.URL, "app-token", "client-token")
 	app, err := client.CreateApplication(GotifyApplication{
 		Name:        "new-app",
 		Description: "test",
 	})
 	if err != nil {
 		t.Fatalf("create: %v", err)
 	}
 	if app.ID != 10 {
 		t.Errorf("expected id 10, got %d", app.ID)
 	}
 }
 func TestGotifyClient_DeleteApplication(t *testing.T) {
 	srv := mockGotifyServer()
 	defer srv.Close()
 	client := NewGotifyClient(srv.URL, "app-token", "client-token")
 	if err := client.DeleteApplication(1); err != nil {
 		t.Fatalf("delete: %v", err)
 	}
 }
 func TestGotifyClient_ErrorResponse(t *testing.T) {
 	// Server that returns 500 for everything
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusInternalServerError)
 		fmt.Fprint(w, "internal error")
 	}))
 	defer srv.Close()
 	client := NewGotifyClient(srv.URL, "app-token", "client-token")
 	_, err := client.SendMessage(GotifyMessage{Title: "test"})
 	if err == nil {
 		t.Fatal("expected error")
 	}
 	_, err = client.ListMessages(10)
 	if err == nil {
 		t.Fatal("expected error")
 	}
 	_, err = client.ListApplications()
 	if err == nil {
 		t.Fatal("expected error")
 	}
 }
 func TestGotifyClient_RateLimited(t *testing.T) {
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusTooManyRequests)
 		fmt.Fprint(w, "rate limited")
 	}))
 	defer srv.Close()
 	client := NewGotifyClient(srv.URL, "app-token", "client-token")
 	_, err := client.SendMessage(GotifyMessage{Title: "test"})
 	if err == nil {
 		t.Fatal("expected error on 429")
 	}
 }
 func TestGotifyClient_InvalidURL(t *testing.T) {
 	client := NewGotifyClient("http://localhost:1", "app-token", "client-token")
 	_, err := client.SendMessage(GotifyMessage{Title: "test"})
 	if err == nil {
 		t.Fatal("expected connection error")
 	}
 }
@@ -0,0 +1,127 @@
 package observability
 import (
 	"fmt"
 	"strings"
 )
 // ExportPrometheus exports metrics in Prometheus text format.
 func (m *Metrics) ExportPrometheus() string {
 	m.mu.RLock()
 	defer m.mu.RUnlock()
 	var sb strings.Builder
 	// Help and type for request_total counter
 	sb.WriteString("# HELP gateway_requests_total Total number of HTTP requests\n")
 	sb.WriteString("# TYPE gateway_requests_total counter\n")
 	for key, count := range m.requestTotal {
 		parts := strings.Split(key, ":")
 		if len(parts) == 3 {
 			route, upstream, status := parts[0], parts[1], parts[2]
 			sb.WriteString(fmt.Sprintf("gateway_requests_total{route=\"%s\",upstream=\"%s\",status=\"%s\"} %d\n",
 				route, upstream, status, count))
 		}
 	}
 	sb.WriteString("\n")
 	// Help and type for request_duration_seconds histogram
 	sb.WriteString("# HELP gateway_request_duration_seconds Request latency in seconds\n")
 	sb.WriteString("# TYPE gateway_request_duration_seconds histogram\n")
 	buckets := []float64{0.005, 0.01, 0.025, 0.05, 0.1, 0.25, 0.5, 1, 2.5, 5, 10}
 	for key := range m.requestDurationBuckets {
 		parts := strings.Split(key, ":")
 		if len(parts) == 2 {
 			route, upstream := parts[0], parts[1]
 			// Write buckets
 			cumulativeCount := int64(0)
 			for _, bucket := range buckets {
 				if count, ok := m.requestDurationBuckets[key][bucket]; ok {
 					cumulativeCount += count
 				}
 				sb.WriteString(fmt.Sprintf("gateway_request_duration_seconds_bucket{route=\"%s\",upstream=\"%s\",le=\"%g\"} %d\n",
 					route, upstream, bucket, cumulativeCount))
 			}
 			// Write +Inf bucket
 			totalCount := int64(0)
 			for _, count := range m.requestDurationBuckets[key] {
 				totalCount += count
 			}
 			sb.WriteString(fmt.Sprintf("gateway_request_duration_seconds_bucket{route=\"%s\",upstream=\"%s\",le=\"+Inf\"} %d\n",
 				route, upstream, totalCount))
 			// Write sum
 			totalDuration := m.requestDuration[key]
 			sb.WriteString(fmt.Sprintf("gateway_request_duration_seconds_sum{route=\"%s\",upstream=\"%s\"} %g\n",
 				route, upstream, float64(totalDuration)/1000.0)) // convert ms to seconds
 			// Write count
 			sb.WriteString(fmt.Sprintf("gateway_request_duration_seconds_count{route=\"%s\",upstream=\"%s\"} %d\n",
 				route, upstream, totalCount))
 		}
 	}
 	sb.WriteString("\n")
 	// Help and type for gateway_bytes_in counter
 	sb.WriteString("# HELP gateway_bytes_in_total Total bytes received from clients\n")
 	sb.WriteString("# TYPE gateway_bytes_in_total counter\n")
 	for key, count := range m.bytesIn {
 		parts := strings.Split(key, ":")
 		if len(parts) == 2 {
 			route, upstream := parts[0], parts[1]
 			sb.WriteString(fmt.Sprintf("gateway_bytes_in_total{route=\"%s\",upstream=\"%s\"} %d\n",
 				route, upstream, count))
 		}
 	}
 	sb.WriteString("\n")
 	// Help and type for gateway_bytes_out counter
 	sb.WriteString("# HELP gateway_bytes_out_total Total bytes sent to clients\n")
 	sb.WriteString("# TYPE gateway_bytes_out_total counter\n")
 	for key, count := range m.bytesOut {
 		parts := strings.Split(key, ":")
 		if len(parts) == 2 {
 			route, upstream := parts[0], parts[1]
 			sb.WriteString(fmt.Sprintf("gateway_bytes_out_total{route=\"%s\",upstream=\"%s\"} %d\n",
 				route, upstream, count))
 		}
 	}
 	sb.WriteString("\n")
 	// Help and type for upstream_health gauge
 	sb.WriteString("# HELP gateway_upstream_health Upstream health status (1=healthy, 0=unhealthy)\n")
 	sb.WriteString("# TYPE gateway_upstream_health gauge\n")
 	for upstream, health := range m.upstreamHealth {
 		sb.WriteString(fmt.Sprintf("gateway_upstream_health{upstream=\"%s\"} %d\n", upstream, health))
 	}
 	sb.WriteString("\n")
 	// Help and type for streaming responses
 	sb.WriteString("# HELP gateway_streaming_responses_total Total streaming responses\n")
 	sb.WriteString("# TYPE gateway_streaming_responses_total counter\n")
 	for key, count := range m.streamingResponsesTotal {
 		parts := strings.Split(key, ":")
 		if len(parts) == 2 {
 			route, upstream := parts[0], parts[1]
 			sb.WriteString(fmt.Sprintf("gateway_streaming_responses_total{route=\"%s\",upstream=\"%s\"} %d\n",
 				route, upstream, count))
 		}
 	}
 	sb.WriteString("\n")
 	// Help and type for streaming byte count
 	sb.WriteString("# HELP gateway_streaming_bytes_total Total bytes in streaming responses\n")
 	sb.WriteString("# TYPE gateway_streaming_bytes_total counter\n")
 	for key, count := range m.streamingByteCount {
 		parts := strings.Split(key, ":")
 		if len(parts) == 2 {
 			route, upstream := parts[0], parts[1]
 			sb.WriteString(fmt.Sprintf("gateway_streaming_bytes_total{route=\"%s\",upstream=\"%s\"} %d\n",
 				route, upstream, count))
 		}
 	}
 	return sb.String()
 }
@@ -0,0 +1,28 @@
 package observability
 import (
 	"net/http"
 )
 // MetricsHandler serves Prometheus metrics
 type MetricsHandler struct {
 	exporter *PrometheusExporter
 }
 // NewMetricsHandler creates a new metrics handler
 func NewMetricsHandler(m *Metrics) *MetricsHandler {
 	return &MetricsHandler{
 		exporter: NewPrometheusExporter(m),
 	}
 }
 // ServeHTTP implements http.Handler for Prometheus /metrics endpoint
 func (h *MetricsHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Type", "text/plain; version=0.0.4; charset=utf-8")
 	w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
 	w.Header().Set("Pragma", "no-cache")
 	w.Header().Set("Expires", "0")
 	w.WriteHeader(http.StatusOK)
 	w.Write([]byte(h.exporter.Export()))
 }
@@ -0,0 +1,454 @@
 package observability
 import (
 	"fmt"
 	"sync"
 	"time"
 )
 // Metrics holds all Prometheus metrics for the gateway.
 type Metrics struct {
 	mu sync.RWMutex
 	// Request counters: request_total{route, upstream, status}
 	requestTotal map[string]int64
 	// Request latencies: request_duration_seconds (histogram)
 	// Stored as cumulative buckets for Prometheus text format
 	requestDuration        map[string]int64             // stores duration samples in milliseconds
 	requestDurationBuckets map[string]map[float64]int64 // histogram buckets
 	// Bytes counters: gateway_bytes{direction, route, upstream}
 	bytesIn  map[string]int64
 	bytesOut map[string]int64
 	// Upstream health: upstream_health{upstream} = 1 or 0
 	upstreamHealth map[string]int
 	// Streaming metrics
 	streamingResponsesTotal map[string]int64
 	streamingByteCount      map[string]int64
 	// LLM inference metrics (TTFT and ITL)
 	// ttftMs: Time-to-First-Token in milliseconds
 	ttftMs map[string][]int64 // samples for histogram
 	// itlMs: Inter-Token Latency in milliseconds
 	itlMs map[string][]int64 // samples for histogram
 	// Token counts
 	tokenCount map[string]int64
 	// CAG metrics
 	warmupRequestsDelayed int64
 	prefixCacheHitTokens  int64
 	queueFullRequests     int64
 	// Admission control metrics (#64)
 	admissionParked   int64
 	admissionRejected map[string]int64
 	engineStateStale  int64
 	// Engine gauge readings mirrored from vLLM (#64)
 	vllmRequestsRunning int64
 	vllmKVUsagePerc     float64
 	observerDegraded    int
 }
 // NewMetrics creates a new Metrics instance.
 func NewMetrics() *Metrics {
 	return &Metrics{
 		requestTotal:            make(map[string]int64),
 		requestDuration:         make(map[string]int64),
 		requestDurationBuckets:  make(map[string]map[float64]int64),
 		bytesIn:                 make(map[string]int64),
 		bytesOut:                make(map[string]int64),
 		upstreamHealth:          make(map[string]int),
 		streamingResponsesTotal: make(map[string]int64),
 		streamingByteCount:      make(map[string]int64),
 		ttftMs:                  make(map[string][]int64),
 		itlMs:                   make(map[string][]int64),
 		tokenCount:              make(map[string]int64),
 		admissionRejected:       make(map[string]int64),
 	}
 }
 // RecordRequest records a request with its route, upstream, status, and duration.
 func (m *Metrics) RecordRequest(route, upstream string, statusCode int, duration time.Duration) {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	key := fmt.Sprintf("%s:%s:%d", route, upstream, statusCode)
 	m.requestTotal[key]++
 	// Record duration in milliseconds
 	durationKey := fmt.Sprintf("%s:%s", route, upstream)
 	m.requestDuration[durationKey] += int64(duration.Milliseconds())
 	// Record in histogram buckets
 	if _, ok := m.requestDurationBuckets[durationKey]; !ok {
 		m.requestDurationBuckets[durationKey] = make(map[float64]int64)
 	}
 	// Prometheus histogram buckets: .005, .01, .025, .05, .1, .25, .5, 1, 2.5, 5, 10
 	buckets := []float64{0.005, 0.01, 0.025, 0.05, 0.1, 0.25, 0.5, 1, 2.5, 5, 10}
 	durationSeconds := duration.Seconds()
 	for _, bucket := range buckets {
 		if durationSeconds <= bucket {
 			m.requestDurationBuckets[durationKey][bucket]++
 		}
 	}
 }
 // RecordBytesIn records incoming bytes.
 func (m *Metrics) RecordBytesIn(route, upstream string, bytes int64) {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	key := fmt.Sprintf("%s:%s", route, upstream)
 	m.bytesIn[key] += bytes
 }
 // RecordBytesOut records outgoing bytes.
 func (m *Metrics) RecordBytesOut(route, upstream string, bytes int64) {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	key := fmt.Sprintf("%s:%s", route, upstream)
 	m.bytesOut[key] += bytes
 }
 // SetUpstreamHealth sets the health status of an upstream (1 = healthy, 0 = unhealthy).
 func (m *Metrics) SetUpstreamHealth(upstream string, healthy bool) {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	if healthy {
 		m.upstreamHealth[upstream] = 1
 	} else {
 		m.upstreamHealth[upstream] = 0
 	}
 }
 // RecordStreamingResponse records a streaming response with its total byte count and duration.
 func (m *Metrics) RecordStreamingResponse(route, upstream string, totalBytes int64, duration time.Duration) {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	key := fmt.Sprintf("%s:%s", route, upstream)
 	m.streamingResponsesTotal[key]++
 	m.streamingByteCount[key] += totalBytes
 	// Also record as request duration
 	m.recordDuration(key, duration)
 }
 func (m *Metrics) recordDuration(key string, duration time.Duration) {
 	m.requestDuration[key] += int64(duration.Milliseconds())
 	if _, ok := m.requestDurationBuckets[key]; !ok {
 		m.requestDurationBuckets[key] = make(map[float64]int64)
 	}
 	buckets := []float64{0.005, 0.01, 0.025, 0.05, 0.1, 0.25, 0.5, 1, 2.5, 5, 10}
 	durationSeconds := duration.Seconds()
 	for _, bucket := range buckets {
 		if durationSeconds <= bucket {
 			m.requestDurationBuckets[key][bucket]++
 		}
 	}
 }
 // GetMetrics returns a copy of current metrics (for testing/export).
 func (m *Metrics) GetMetrics() map[string]interface{} {
 	m.mu.RLock()
 	defer m.mu.RUnlock()
 	return map[string]interface{}{
 		"request_total":             m.requestTotal,
 		"request_duration":          m.requestDuration,
 		"request_duration_buckets":  m.requestDurationBuckets,
 		"bytes_in":                  m.bytesIn,
 		"bytes_out":                 m.bytesOut,
 		"upstream_health":           m.upstreamHealth,
 		"streaming_responses_total": m.streamingResponsesTotal,
 		"streaming_byte_count":      m.streamingByteCount,
 		"llm_ttft_ms":               m.ttftMs,
 		"llm_itl_ms":                m.itlMs,
 		"llm_token_count":           m.tokenCount,
 	}
 }
 // RecordTTFT records Time-to-First-Token in milliseconds
 func (m *Metrics) RecordTTFT(model string, ttftMs int64) {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	key := fmt.Sprintf("llm:ttft:%s", model)
 	m.ttftMs[key] = append(m.ttftMs[key], ttftMs)
 }
 // RecordITL records Inter-Token Latency in milliseconds
 func (m *Metrics) RecordITL(model string, itlMs int64) {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	key := fmt.Sprintf("llm:itl:%s", model)
 	m.itlMs[key] = append(m.itlMs[key], itlMs)
 }
 // RecordTokenCount records number of tokens in response
 func (m *Metrics) RecordTokenCount(model string, count int64) {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	key := fmt.Sprintf("llm:tokens:%s", model)
 	m.tokenCount[key] += count
 }
 // GetTTFTMetrics returns TTFT statistics for Prometheus export
 func (m *Metrics) GetTTFTMetrics() map[string]interface{} {
 	m.mu.RLock()
 	defer m.mu.RUnlock()
 	result := make(map[string]interface{})
 	for key, samples := range m.ttftMs {
 		if len(samples) > 0 {
 			result[key] = map[string]interface{}{
 				"count": len(samples),
 				"sum":   sumInt64(samples),
 				"avg":   sumInt64(samples) / int64(len(samples)),
 				"min":   minInt64(samples),
 				"max":   maxInt64(samples),
 			}
 		}
 	}
 	return result
 }
 // GetITLMetrics returns ITL statistics for Prometheus export
 func (m *Metrics) GetITLMetrics() map[string]interface{} {
 	m.mu.RLock()
 	defer m.mu.RUnlock()
 	result := make(map[string]interface{})
 	for key, samples := range m.itlMs {
 		if len(samples) > 0 {
 			result[key] = map[string]interface{}{
 				"count": len(samples),
 				"sum":   sumInt64(samples),
 				"avg":   sumInt64(samples) / int64(len(samples)),
 				"min":   minInt64(samples),
 				"max":   maxInt64(samples),
 			}
 		}
 	}
 	return result
 }
 func sumInt64(vals []int64) int64 {
 	var s int64
 	for _, v := range vals {
 		s += v
 	}
 	return s
 }
 func minInt64(vals []int64) int64 {
 	if len(vals) == 0 {
 		return 0
 	}
 	min := vals[0]
 	for _, v := range vals {
 		if v < min {
 			min = v
 		}
 	}
 	return min
 }
 func maxInt64(vals []int64) int64 {
 	if len(vals) == 0 {
 		return 0
 	}
 	max := vals[0]
 	for _, v := range vals {
 		if v > max {
 			max = v
 		}
 	}
 	return max
 }
 // Reset clears all metrics (for testing).
 func (m *Metrics) Reset() {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	m.requestTotal = make(map[string]int64)
 	m.requestDuration = make(map[string]int64)
 	m.requestDurationBuckets = make(map[string]map[float64]int64)
 	m.bytesIn = make(map[string]int64)
 	m.bytesOut = make(map[string]int64)
 	m.upstreamHealth = make(map[string]int)
 	m.streamingResponsesTotal = make(map[string]int64)
 	m.streamingByteCount = make(map[string]int64)
 	m.ttftMs = make(map[string][]int64)
 	m.itlMs = make(map[string][]int64)
 	m.tokenCount = make(map[string]int64)
 	m.warmupRequestsDelayed = 0
 	m.prefixCacheHitTokens = 0
 	m.queueFullRequests = 0
 	m.admissionParked = 0
 	m.admissionRejected = make(map[string]int64)
 	m.engineStateStale = 0
 	m.vllmRequestsRunning = 0
 	m.vllmKVUsagePerc = 0
 	m.observerDegraded = 0
 }
 // IncrQueueFull increments queue_full_requests_total.
 func (m *Metrics) IncrQueueFull() {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	m.queueFullRequests++
 }
 // GetQueueFull returns queue_full_requests_total.
 func (m *Metrics) GetQueueFull() int64 {
 	m.mu.RLock()
 	defer m.mu.RUnlock()
 	return m.queueFullRequests
 }
 // IncrWarmupDelayed increments warmup_requests_delayed_total.
 func (m *Metrics) IncrWarmupDelayed() {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	m.warmupRequestsDelayed++
 }
 // GetWarmupDelayed returns warmup_requests_delayed_total.
 func (m *Metrics) GetWarmupDelayed() int64 {
 	m.mu.RLock()
 	defer m.mu.RUnlock()
 	return m.warmupRequestsDelayed
 }
 // IncrPrefixCacheHitTokens increments vllm_prefix_cache_hit_tokens_total by n.
 func (m *Metrics) IncrPrefixCacheHitTokens(n int64) {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	m.prefixCacheHitTokens += n
 }
 // GetPrefixCacheHitTokens returns vllm_prefix_cache_hit_tokens_total.
 func (m *Metrics) GetPrefixCacheHitTokens() int64 {
 	m.mu.RLock()
 	defer m.mu.RUnlock()
 	return m.prefixCacheHitTokens
 }
 // IncrAdmissionParked increments admission_parked_total.
 func (m *Metrics) IncrAdmissionParked() {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	m.admissionParked++
 }
 // GetAdmissionParked returns admission_parked_total.
 func (m *Metrics) GetAdmissionParked() int64 {
 	m.mu.RLock()
 	defer m.mu.RUnlock()
 	return m.admissionParked
 }
 // IncrAdmissionRejected increments admission_rejected_total{reason=reason}.
 func (m *Metrics) IncrAdmissionRejected(reason string) {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	m.admissionRejected[reason]++
 }
 // GetAdmissionRejected returns a copy of admission_rejected_total by reason.
 func (m *Metrics) GetAdmissionRejected() map[string]int64 {
 	m.mu.RLock()
 	defer m.mu.RUnlock()
 	out := make(map[string]int64, len(m.admissionRejected))
 	for reason, count := range m.admissionRejected {
 		out[reason] = count
 	}
 	return out
 }
 // IncrEngineStateStale increments engine_state_stale_total.
 func (m *Metrics) IncrEngineStateStale() {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	m.engineStateStale++
 }
 // GetEngineStateStale returns engine_state_stale_total.
 func (m *Metrics) GetEngineStateStale() int64 {
 	m.mu.RLock()
 	defer m.mu.RUnlock()
 	return m.engineStateStale
 }
 // SetVLLMRequestsRunning sets vllm_requests_running from the gateway's own reading.
 func (m *Metrics) SetVLLMRequestsRunning(n int64) {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	m.vllmRequestsRunning = n
 }
 // GetVLLMRequestsRunning returns vllm_requests_running.
 func (m *Metrics) GetVLLMRequestsRunning() int64 {
 	m.mu.RLock()
 	defer m.mu.RUnlock()
 	return m.vllmRequestsRunning
 }
 // SetVLLMKVUsagePerc sets vllm_kv_usage_perc from the gateway's own reading.
 func (m *Metrics) SetVLLMKVUsagePerc(v float64) {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	m.vllmKVUsagePerc = v
 }
 // GetVLLMKVUsagePerc returns vllm_kv_usage_perc.
 func (m *Metrics) GetVLLMKVUsagePerc() float64 {
 	m.mu.RLock()
 	defer m.mu.RUnlock()
 	return m.vllmKVUsagePerc
 }
 // SetObserverDegraded sets observer_degraded (1 = startup self-check failed).
 func (m *Metrics) SetObserverDegraded(degraded bool) {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	if degraded {
 		m.observerDegraded = 1
 	} else {
 		m.observerDegraded = 0
 	}
 }
 // GetObserverDegraded returns observer_degraded.
 func (m *Metrics) GetObserverDegraded() int {
 	m.mu.RLock()
 	defer m.mu.RUnlock()
 	return m.observerDegraded
 }
 // globalMetrics is the singleton Metrics instance for gateway-wide telemetry.
 var (
 	globalMetrics     *Metrics
 	globalMetricsOnce sync.Once
 )
 // Global returns the singleton Metrics instance, initialising on first call.
 func Global() *Metrics {
 	globalMetricsOnce.Do(func() { globalMetrics = NewMetrics() })
 	return globalMetrics
 }
@@ -0,0 +1,162 @@
 package observability
 import (
 	"strings"
 	"testing"
 	"time"
 )
 func TestMetricsRecordRequest(t *testing.T) {
 	m := NewMetrics()
 	// Record some requests
 	m.RecordRequest("v1-chat", "reasoning", 200, 500*time.Millisecond)
 	m.RecordRequest("v1-chat", "reasoning", 200, 600*time.Millisecond)
 	m.RecordRequest("v1-chat", "reasoning", 500, 100*time.Millisecond)
 	metrics := m.GetMetrics()
 	requestTotal := metrics["request_total"].(map[string]int64)
 	if requestTotal["v1-chat:reasoning:200"] != 2 {
 		t.Errorf("expected 2 successful requests, got %d", requestTotal["v1-chat:reasoning:200"])
 	}
 	if requestTotal["v1-chat:reasoning:500"] != 1 {
 		t.Errorf("expected 1 error request, got %d", requestTotal["v1-chat:reasoning:500"])
 	}
 }
 func TestMetricsRecordBytes(t *testing.T) {
 	m := NewMetrics()
 	m.RecordBytesIn("v1-chat", "reasoning", 1024)
 	m.RecordBytesOut("v1-chat", "reasoning", 2048)
 	metrics := m.GetMetrics()
 	bytesIn := metrics["bytes_in"].(map[string]int64)
 	bytesOut := metrics["bytes_out"].(map[string]int64)
 	if bytesIn["v1-chat:reasoning"] != 1024 {
 		t.Errorf("expected 1024 bytes in, got %d", bytesIn["v1-chat:reasoning"])
 	}
 	if bytesOut["v1-chat:reasoning"] != 2048 {
 		t.Errorf("expected 2048 bytes out, got %d", bytesOut["v1-chat:reasoning"])
 	}
 }
 func TestMetricsUpstreamHealth(t *testing.T) {
 	m := NewMetrics()
 	m.SetUpstreamHealth("reasoning", true)
 	m.SetUpstreamHealth("embedding", false)
 	metrics := m.GetMetrics()
 	health := metrics["upstream_health"].(map[string]int)
 	if health["reasoning"] != 1 {
 		t.Errorf("expected reasoning upstream healthy (1), got %d", health["reasoning"])
 	}
 	if health["embedding"] != 0 {
 		t.Errorf("expected embedding upstream unhealthy (0), got %d", health["embedding"])
 	}
 }
 func TestExportPrometheus(t *testing.T) {
 	m := NewMetrics()
 	// Record some data
 	m.RecordRequest("v1-chat", "reasoning", 200, 500*time.Millisecond)
 	m.RecordBytesIn("v1-chat", "reasoning", 1024)
 	m.RecordBytesOut("v1-chat", "reasoning", 2048)
 	m.SetUpstreamHealth("reasoning", true)
 	export := m.ExportPrometheus()
 	// Check for expected metric families
 	if !strings.Contains(export, "# HELP gateway_requests_total") {
 		t.Errorf("missing gateway_requests_total help")
 	}
 	if !strings.Contains(export, "# TYPE gateway_requests_total counter") {
 		t.Errorf("missing gateway_requests_total type")
 	}
 	if !strings.Contains(export, "gateway_requests_total{route=\"v1-chat\",upstream=\"reasoning\",status=\"200\"} 1") {
 		t.Errorf("missing or incorrect request_total metric")
 	}
 	if !strings.Contains(export, "# HELP gateway_bytes_in_total") {
 		t.Errorf("missing gateway_bytes_in_total help")
 	}
 	if !strings.Contains(export, "gateway_bytes_in_total{route=\"v1-chat\",upstream=\"reasoning\"} 1024") {
 		t.Errorf("missing or incorrect bytes_in metric")
 	}
 	if !strings.Contains(export, "gateway_bytes_out_total{route=\"v1-chat\",upstream=\"reasoning\"} 2048") {
 		t.Errorf("missing or incorrect bytes_out metric")
 	}
 	if !strings.Contains(export, "gateway_upstream_health{upstream=\"reasoning\"} 1") {
 		t.Errorf("missing or incorrect upstream_health metric")
 	}
 }
 func TestExportPrometheusHistogram(t *testing.T) {
 	m := NewMetrics()
 	// Record requests with different durations
 	m.RecordRequest("v1-chat", "reasoning", 200, 50*time.Millisecond)
 	m.RecordRequest("v1-chat", "reasoning", 200, 200*time.Millisecond)
 	m.RecordRequest("v1-chat", "reasoning", 200, 1*time.Second)
 	export := m.ExportPrometheus()
 	// Check for histogram structure
 	if !strings.Contains(export, "# HELP gateway_request_duration_seconds Request latency in seconds") {
 		t.Errorf("missing duration_seconds help")
 	}
 	if !strings.Contains(export, "# TYPE gateway_request_duration_seconds histogram") {
 		t.Errorf("missing histogram type")
 	}
 	if !strings.Contains(export, "gateway_request_duration_seconds_bucket") {
 		t.Errorf("missing histogram bucket")
 	}
 	if !strings.Contains(export, "gateway_request_duration_seconds_count") {
 		t.Errorf("missing histogram count")
 	}
 }
 func TestMetricsThreadSafety(t *testing.T) {
 	m := NewMetrics()
 	// Concurrent recordings
 	done := make(chan bool, 2)
 	go func() {
 		for i := 0; i < 100; i++ {
 			m.RecordRequest("route1", "upstream1", 200, time.Millisecond)
 		}
 		done <- true
 	}()
 	go func() {
 		for i := 0; i < 100; i++ {
 			m.RecordBytesIn("route2", "upstream2", 1024)
 		}
 		done <- true
 	}()
 	<-done
 	<-done
 	metrics := m.GetMetrics()
 	if len(metrics["request_total"].(map[string]int64)) == 0 {
 		t.Errorf("expected metrics to be recorded")
 	}
 }
@@ -0,0 +1,242 @@
 package observability
 import (
 	"fmt"
 	"sort"
 	"strings"
 )
 // PrometheusExporter exports metrics in Prometheus text format
 type PrometheusExporter struct {
 	metrics *Metrics
 }
 // NewPrometheusExporter creates a new Prometheus exporter
 func NewPrometheusExporter(m *Metrics) *PrometheusExporter {
 	return &PrometheusExporter{metrics: m}
 }
 // Export returns metrics in Prometheus text format
 func (p *PrometheusExporter) Export() string {
 	var lines []string
 	lines = append(lines, "# HELP llm_ttft_seconds Time to first token for LLM inference (seconds)")
 	lines = append(lines, "# TYPE llm_ttft_seconds histogram")
 	p.exportTTFT(&lines)
 	lines = append(lines, "# HELP llm_itl_seconds Inter-token latency for LLM inference (seconds)")
 	lines = append(lines, "# TYPE llm_itl_seconds histogram")
 	p.exportITL(&lines)
 	lines = append(lines, "# HELP llm_tokens_total Total tokens generated")
 	lines = append(lines, "# TYPE llm_tokens_total counter")
 	p.exportTokens(&lines)
 	lines = append(lines, "# HELP request_duration_seconds Request latency")
 	lines = append(lines, "# TYPE request_duration_seconds histogram")
 	p.exportRequestDuration(&lines)
 	lines = append(lines, "# HELP queue_full_requests_total Requests rejected due to backend queue saturation")
 	lines = append(lines, "# TYPE queue_full_requests_total counter")
 	lines = append(lines, fmt.Sprintf("queue_full_requests_total %d", p.metrics.GetQueueFull()))
 	lines = append(lines, "# HELP warmup_requests_delayed_total LLM warmup requests delayed for vLLM slot management")
 	lines = append(lines, "# TYPE warmup_requests_delayed_total counter")
 	lines = append(lines, fmt.Sprintf("warmup_requests_delayed_total %d", p.metrics.GetWarmupDelayed()))
 	lines = append(lines, "# HELP vllm_prefix_cache_hit_tokens_total vLLM KV prefix cache hit tokens")
 	lines = append(lines, "# TYPE vllm_prefix_cache_hit_tokens_total counter")
 	lines = append(lines, fmt.Sprintf("vllm_prefix_cache_hit_tokens_total %d", p.metrics.GetPrefixCacheHitTokens()))
 	lines = append(lines, "# HELP admission_parked_total Requests parked waiting for engine admission")
 	lines = append(lines, "# TYPE admission_parked_total counter")
 	lines = append(lines, fmt.Sprintf("admission_parked_total %d", p.metrics.GetAdmissionParked()))
 	lines = append(lines, "# HELP admission_rejected_total Requests rejected by engine admission control")
 	lines = append(lines, "# TYPE admission_rejected_total counter")
 	rejected := p.metrics.GetAdmissionRejected()
 	reasons := make([]string, 0, len(rejected))
 	for reason := range rejected {
 		reasons = append(reasons, reason)
 	}
 	sort.Strings(reasons)
 	for _, reason := range reasons {
 		lines = append(lines, fmt.Sprintf(`admission_rejected_total{reason="%s"} %d`, reason, rejected[reason]))
 	}
 	lines = append(lines, "# HELP engine_state_stale_total Times the engine metrics feed went stale")
 	lines = append(lines, "# TYPE engine_state_stale_total counter")
 	lines = append(lines, fmt.Sprintf("engine_state_stale_total %d", p.metrics.GetEngineStateStale()))
 	lines = append(lines, "# HELP vllm_requests_running vLLM requests running as read by the gateway")
 	lines = append(lines, "# TYPE vllm_requests_running gauge")
 	lines = append(lines, fmt.Sprintf("vllm_requests_running %d", p.metrics.GetVLLMRequestsRunning()))
 	lines = append(lines, "# HELP vllm_kv_usage_perc vLLM KV cache usage fraction as read by the gateway")
 	lines = append(lines, "# TYPE vllm_kv_usage_perc gauge")
 	lines = append(lines, fmt.Sprintf("vllm_kv_usage_perc %g", p.metrics.GetVLLMKVUsagePerc()))
 	lines = append(lines, "# HELP observer_degraded Engine metrics observer startup self-check failed (1) or healthy (0)")
 	lines = append(lines, "# TYPE observer_degraded gauge")
 	lines = append(lines, fmt.Sprintf("observer_degraded %d", p.metrics.GetObserverDegraded()))
 	return strings.Join(lines, "\n") + "\n"
 }
 func (p *PrometheusExporter) exportTTFT(lines *[]string) {
 	p.metrics.mu.RLock()
 	defer p.metrics.mu.RUnlock()
 	// Calculate statistics for each model
 	for key, samples := range p.metrics.ttftMs {
 		if len(samples) == 0 {
 			continue
 		}
 		model := extractModel(key)
 		sum := sumInt64(samples)
 		// Export histogram buckets (in seconds)
 		buckets := []float64{0.001, 0.01, 0.05, 0.1, 0.5, 1.0, 5.0}
 		for _, bucket := range buckets {
 			count := countLessOrEqual(samples, int64(bucket*1000))
 			*lines = append(*lines, fmt.Sprintf(
 				`llm_ttft_seconds_bucket{model="%s",le="%.3f"} %d`,
 				model, bucket, count,
 			))
 		}
 		*lines = append(*lines, fmt.Sprintf(
 			`llm_ttft_seconds_bucket{model="%s",le="+Inf"} %d`,
 			model, len(samples),
 		))
 		*lines = append(*lines, fmt.Sprintf(
 			`llm_ttft_seconds_sum{model="%s"} %.3f`,
 			model, float64(sum)/1000,
 		))
 		*lines = append(*lines, fmt.Sprintf(
 			`llm_ttft_seconds_count{model="%s"} %d`,
 			model, len(samples),
 		))
 	}
 }
 func (p *PrometheusExporter) exportITL(lines *[]string) {
 	p.metrics.mu.RLock()
 	defer p.metrics.mu.RUnlock()
 	for key, samples := range p.metrics.itlMs {
 		if len(samples) == 0 {
 			continue
 		}
 		model := extractModel(key)
 		sum := sumInt64(samples)
 		// Export histogram buckets (in seconds)
 		buckets := []float64{0.001, 0.01, 0.05, 0.1, 0.5, 1.0, 5.0}
 		for _, bucket := range buckets {
 			count := countLessOrEqual(samples, int64(bucket*1000))
 			*lines = append(*lines, fmt.Sprintf(
 				`llm_itl_seconds_bucket{model="%s",le="%.3f"} %d`,
 				model, bucket, count,
 			))
 		}
 		*lines = append(*lines, fmt.Sprintf(
 			`llm_itl_seconds_bucket{model="%s",le="+Inf"} %d`,
 			model, len(samples),
 		))
 		*lines = append(*lines, fmt.Sprintf(
 			`llm_itl_seconds_sum{model="%s"} %.3f`,
 			model, float64(sum)/1000,
 		))
 		*lines = append(*lines, fmt.Sprintf(
 			`llm_itl_seconds_count{model="%s"} %d`,
 			model, len(samples),
 		))
 	}
 }
 func (p *PrometheusExporter) exportTokens(lines *[]string) {
 	p.metrics.mu.RLock()
 	defer p.metrics.mu.RUnlock()
 	// Sort keys for consistent output
 	var keys []string
 	for k := range p.metrics.tokenCount {
 		keys = append(keys, k)
 	}
 	sort.Strings(keys)
 	for _, key := range keys {
 		model := extractModel(key)
 		count := p.metrics.tokenCount[key]
 		*lines = append(*lines, fmt.Sprintf(
 			`llm_tokens_total{model="%s"} %d`,
 			model, count,
 		))
 	}
 }
 func (p *PrometheusExporter) exportRequestDuration(lines *[]string) {
 	p.metrics.mu.RLock()
 	defer p.metrics.mu.RUnlock()
 	// Sort keys for consistent output
 	var keys []string
 	for k := range p.metrics.requestDuration {
 		keys = append(keys, k)
 	}
 	sort.Strings(keys)
 	for _, key := range keys {
 		route, upstream := parseKey(key)
 		totalMs := p.metrics.requestDuration[key]
 		count := int64(1) // We'd need to track count separately in real impl
 		if buckets, ok := p.metrics.requestDurationBuckets[key]; ok {
 			for bucket := range buckets {
 				*lines = append(*lines, fmt.Sprintf(
 					`request_duration_seconds_bucket{route="%s",upstream="%s",le="%.1f"} %d`,
 					route, upstream, bucket, buckets[bucket],
 				))
 			}
 		}
 		*lines = append(*lines, fmt.Sprintf(
 			`request_duration_seconds_sum{route="%s",upstream="%s"} %.3f`,
 			route, upstream, float64(totalMs)/1000,
 		))
 		*lines = append(*lines, fmt.Sprintf(
 			`request_duration_seconds_count{route="%s",upstream="%s"} %d`,
 			route, upstream, count,
 		))
 	}
 }
 func extractModel(key string) string {
 	parts := strings.Split(key, ":")
 	if len(parts) >= 3 {
 		return parts[2]
 	}
 	return key
 }
 func parseKey(key string) (string, string) {
 	parts := strings.Split(key, ":")
 	if len(parts) >= 2 {
 		return parts[0], parts[1]
 	}
 	return key, ""
 }
 func countLessOrEqual(samples []int64, threshold int64) int {
 	count := 0
 	for _, s := range samples {
 		if s <= threshold {
 			count++
 		}
 	}
 	return count
 }
@@ -0,0 +1,124 @@
 package problem
 import (
 	"encoding/json"
 	"net/http"
 	"strconv"
 )
 // Problem represents an RFC 7807 / RFC 9457 problem document.
 // We use 9457 as the canonical reference (HTTP Semantics updates).
 type Problem struct {
 	Type     string      `json:"type"`              // stable URI per rejection reason
 	Title    string      `json:"title"`             // human-readable summary
 	Status   int         `json:"status"`            // HTTP status code
 	Detail   string      `json:"detail"`            // human-useful detail, names offending input
 	Instance string      `json:"instance,omitempty"` // URI of the affected resource
 	RetryAfter *int      `json:"retry_after,omitempty"` // seconds until retry is safe
 	Extra    map[string]interface{} `json:"extra,omitempty"` // additional fields
 }
 // NewProblem creates a new problem document with the given parameters.
 func NewProblem(statusCode int, typeURI, title, detail string) *Problem {
 	return &Problem{
 		Type:   typeURI,
 		Title:  title,
 		Status: statusCode,
 		Detail: detail,
 		Extra:  make(map[string]interface{}),
 	}
 }
 // WithRetryAfter sets the Retry-After field (in seconds).
 func (p *Problem) WithRetryAfter(seconds int) *Problem {
 	p.RetryAfter = &seconds
 	return p
 }
 // WithInstance sets the Instance field.
 func (p *Problem) WithInstance(instance string) *Problem {
 	p.Instance = instance
 	return p
 }
 // WithExtra adds extra fields to the problem document.
 func (p *Problem) WithExtra(key string, value interface{}) *Problem {
 	p.Extra[key] = value
 	return p
 }
 // Write sends the problem document to the HTTP response writer.
 func (p *Problem) Write(w http.ResponseWriter) error {
 	w.Header().Set("Content-Type", "application/problem+json")
 	// Set Retry-After header if present
 	if p.RetryAfter != nil {
 		w.Header().Set("Retry-After", strconv.Itoa(*p.RetryAfter))
 	}
 	w.WriteHeader(p.Status)
 	body, err := json.Marshal(p)
 	if err != nil {
 		return err
 	}
 	_, err = w.Write(body)
 	return err
 }
 // Common problem types
 const (
 	TypeBadRequest       = "about:blank#bad-request"
 	TypeUnauthorized     = "about:blank#unauthorized"
 	TypeForbidden        = "about:blank#forbidden"
 	TypeNotFound         = "about:blank#not-found"
 	TypeMethodNotAllowed = "about:blank#method-not-allowed"
 	TypeConflict         = "about:blank#conflict"
 	TypeGone             = "about:blank#gone"
 	TypePayloadTooLarge  = "about:blank#payload-too-large"
 	TypeUnprocessable    = "about:blank#unprocessable-entity"
 	TypeTooManyRequests  = "about:blank#too-many-requests"
 	TypeInternalError    = "about:blank#internal-server-error"
 	TypeNotImplemented   = "about:blank#not-implemented"
 	TypeUnavailable      = "about:blank#service-unavailable"
 )
 // Common constructors
 func BadRequest(detail string) *Problem {
 	return NewProblem(http.StatusBadRequest, TypeBadRequest, "Bad Request", detail)
 }
 func Unauthorized(detail string) *Problem {
 	return NewProblem(http.StatusUnauthorized, TypeUnauthorized, "Unauthorized", detail)
 }
 func Forbidden(detail string) *Problem {
 	return NewProblem(http.StatusForbidden, TypeForbidden, "Forbidden", detail)
 }
 func NotFound(detail string) *Problem {
 	return NewProblem(http.StatusNotFound, TypeNotFound, "Not Found", detail)
 }
 func PayloadTooLarge(detail string) *Problem {
 	return NewProblem(http.StatusRequestEntityTooLarge, TypePayloadTooLarge, "Payload Too Large", detail)
 }
 func UnprocessableEntity(detail string) *Problem {
 	return NewProblem(http.StatusUnprocessableEntity, TypeUnprocessable, "Unprocessable Entity", detail)
 }
 func TooManyRequests(detail string, retryAfter int) *Problem {
 	return NewProblem(http.StatusTooManyRequests, TypeTooManyRequests, "Too Many Requests", detail).
 		WithRetryAfter(retryAfter)
 }
 func InternalServerError(detail string) *Problem {
 	return NewProblem(http.StatusInternalServerError, TypeInternalError, "Internal Server Error", detail)
 }
 func ServiceUnavailable(detail string, retryAfter int) *Problem {
 	return NewProblem(http.StatusServiceUnavailable, TypeUnavailable, "Service Unavailable", detail).
 		WithRetryAfter(retryAfter)
 }
@@ -0,0 +1,162 @@
 package problem
 import (
 	"encoding/json"
 	"net/http"
 	"net/http/httptest"
 	"testing"
 )
 func TestProblemDocument(t *testing.T) {
 	tests := []struct {
 		name       string
 		problem    *Problem
 		statusCode int
 		hasType    bool
 		hasTitle   bool
 		hasStatus  bool
 		hasDetail  bool
 	}{
 		{
 			name:       "BadRequest",
 			problem:    BadRequest("missing field: model"),
 			statusCode: http.StatusBadRequest,
 			hasType:    true,
 			hasTitle:   true,
 			hasStatus:  true,
 			hasDetail:  true,
 		},
 		{
 			name:       "PayloadTooLarge",
 			problem:    PayloadTooLarge("request body 1001 bytes exceeds max 1000"),
 			statusCode: http.StatusRequestEntityTooLarge,
 			hasType:    true,
 			hasTitle:   true,
 			hasStatus:  true,
 			hasDetail:  true,
 		},
 		{
 			name:       "TooManyRequests",
 			problem:    TooManyRequests("rate limit exceeded", 60),
 			statusCode: http.StatusTooManyRequests,
 			hasType:    true,
 			hasTitle:   true,
 			hasStatus:  true,
 			hasDetail:  true,
 		},
 	}
 	for _, tc := range tests {
 		t.Run(tc.name, func(t *testing.T) {
 			w := httptest.NewRecorder()
 			err := tc.problem.Write(w)
 			if err != nil {
 				t.Fatalf("Write failed: %v", err)
 			}
 			// Check status code
 			if w.Code != tc.statusCode {
 				t.Errorf("expected status %d, got %d", tc.statusCode, w.Code)
 			}
 			// Check Content-Type
 			if ct := w.Header().Get("Content-Type"); ct != "application/problem+json" {
 				t.Errorf("expected Content-Type: application/problem+json, got %s", ct)
 			}
 			// Parse response body
 			var p Problem
 			err = json.Unmarshal(w.Body.Bytes(), &p)
 			if err != nil {
 				t.Fatalf("failed to unmarshal response: %v", err)
 			}
 			// Verify required fields
 			if tc.hasType && p.Type == "" {
 				t.Errorf("expected 'type' field, got empty")
 			}
 			if tc.hasTitle && p.Title == "" {
 				t.Errorf("expected 'title' field, got empty")
 			}
 			if tc.hasStatus && p.Status == 0 {
 				t.Errorf("expected 'status' field, got 0")
 			}
 			if tc.hasDetail && p.Detail == "" {
 				t.Errorf("expected 'detail' field, got empty")
 			}
 			// Verify status matches HTTP response code
 			if p.Status != w.Code {
 				t.Errorf("status field %d does not match HTTP status %d", p.Status, w.Code)
 			}
 		})
 	}
 }
 func TestProblemRetryAfter(t *testing.T) {
 	p := TooManyRequests("rate limit", 120)
 	w := httptest.NewRecorder()
 	err := p.Write(w)
 	if err != nil {
 		t.Fatalf("Write failed: %v", err)
 	}
 	// Check Retry-After header is set
 	if ra := w.Header().Get("Retry-After"); ra == "" {
 		t.Errorf("expected Retry-After header, got empty")
 	}
 	var body Problem
 	json.Unmarshal(w.Body.Bytes(), &body)
 	if body.RetryAfter == nil || *body.RetryAfter != 120 {
 		t.Errorf("expected RetryAfter=120, got %v", body.RetryAfter)
 	}
 }
 func TestProblemWithExtra(t *testing.T) {
 	p := BadRequest("invalid request")
 	p.WithExtra("field", "model")
 	p.WithExtra("reason", "unknown_model")
 	w := httptest.NewRecorder()
 	err := p.Write(w)
 	if err != nil {
 		t.Fatalf("Write failed: %v", err)
 	}
 	var body Problem
 	json.Unmarshal(w.Body.Bytes(), &body)
 	if body.Extra["field"] != "model" {
 		t.Errorf("expected extra field 'model', got %v", body.Extra["field"])
 	}
 	if body.Extra["reason"] != "unknown_model" {
 		t.Errorf("expected extra reason 'unknown_model', got %v", body.Extra["reason"])
 	}
 }
 func TestNoSecretsInProblem(t *testing.T) {
 	// Verify that secrets, tokens, bodies are never leaked
 	p := Unauthorized("invalid bearer token").
 		WithExtra("attempted_route", "/v1/chat/completions")
 	w := httptest.NewRecorder()
 	p.Write(w)
 	body := w.Body.String()
 	// Should not contain any auth-related secrets
 	if len(body) > 200 {
 		t.Errorf("problem document too large for detail: %d bytes (check for leaked content)", len(body))
 	}
 	// Parse and verify no sensitive fields are present
 	var doc Problem
 	json.Unmarshal(w.Body.Bytes(), &doc)
 	// Detail should describe the problem, not echo the token
 	if len(doc.Detail) > 100 {
 		t.Errorf("detail too long: %s", doc.Detail)
 	}
 }
@@ -0,0 +1,160 @@
 package proxy
 import (
 	"encoding/json"
 	"io"
 	"net/http"
 	"net/url"
 	"time"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/logging"
 )
 // tokenRequest is the JSON body for POST /auth/token.
 type tokenRequest struct {
 	Username string `json:"username"`
 	Password string `json:"password"`
 	Scope    string `json:"scope,omitempty"`
 }
 // refreshRequest is the JSON body for POST /auth/refresh.
 type refreshRequest struct {
 	RefreshToken string `json:"refresh_token"`
 	Scope        string `json:"scope,omitempty"`
 }
 // authClient handles token exchange with the upstream identity provider.
 // Extracted for testability — production uses http.DefaultClient,
 // tests inject a stub.
 type authClient interface {
 	PostForm(url string, data url.Values) (*http.Response, error)
 }
 // httpAuthClient wraps http.Client to implement authClient.
 type httpAuthClient struct {
 	client *http.Client
 }
 func (c *httpAuthClient) PostForm(url string, data url.Values) (*http.Response, error) {
 	return c.client.PostForm(url, data)
 }
 func newAuthClient() authClient {
 	return &httpAuthClient{
 		client: &http.Client{Timeout: 10 * time.Second},
 	}
 }
 // handleAuthToken exchanges username+password for a JWT via the upstream
 // identity provider's token endpoint using grant_type=password.
 func (h *Handler) handleAuthToken(w http.ResponseWriter, r *http.Request) {
 	if r.Method != "POST" {
 		writeProblemDetail(w, http.StatusMethodNotAllowed,
 			"about:blank#method-not-allowed", "Method Not Allowed",
 			"POST only", nil)
 		return
 	}
 	if h.config.Auth.TokenURL == "" || h.config.Auth.ClientID == "" {
 		writeProblemDetail(w, http.StatusServiceUnavailable,
 			"about:blank#not-configured", "Not Configured",
 			"token endpoint not configured", nil)
 		return
 	}
 	var req tokenRequest
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
 		writeProblemDetail(w, http.StatusBadRequest,
 			"about:blank#bad-request", "Bad Request",
 			"invalid JSON body", nil)
 		return
 	}
 	if req.Username == "" || req.Password == "" {
 		writeProblemDetail(w, http.StatusBadRequest,
 			"about:blank#bad-request", "Bad Request",
 			"username and password are required", nil)
 		return
 	}
 	scope := req.Scope
 	if scope == "" {
 		scope = "openid roles permissions"
 	}
 	form := url.Values{
 		"grant_type":    {"password"},
 		"username":      {req.Username},
 		"password":      {req.Password},
 		"client_id":     {h.config.Auth.ClientID},
 		"client_secret": {h.config.Auth.ClientSecret},
 		"scope":         {scope},
 	}
 	h.forwardTokenResponse(w, form, "/auth/token")
 }
 // handleAuthRefresh exchanges a refresh token for a new JWT.
 func (h *Handler) handleAuthRefresh(w http.ResponseWriter, r *http.Request) {
 	if r.Method != "POST" {
 		writeProblemDetail(w, http.StatusMethodNotAllowed,
 			"about:blank#method-not-allowed", "Method Not Allowed",
 			"POST only", nil)
 		return
 	}
 	if h.config.Auth.TokenURL == "" || h.config.Auth.ClientID == "" {
 		writeProblemDetail(w, http.StatusServiceUnavailable,
 			"about:blank#not-configured", "Not Configured",
 			"token endpoint not configured", nil)
 		return
 	}
 	var req refreshRequest
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
 		writeProblemDetail(w, http.StatusBadRequest,
 			"about:blank#bad-request", "Bad Request",
 			"invalid JSON body", nil)
 		return
 	}
 	if req.RefreshToken == "" {
 		writeProblemDetail(w, http.StatusBadRequest,
 			"about:blank#bad-request", "Bad Request",
 			"refresh_token is required", nil)
 		return
 	}
 	form := url.Values{
 		"grant_type":    {"refresh_token"},
 		"refresh_token": {req.RefreshToken},
 		"client_id":     {h.config.Auth.ClientID},
 		"client_secret": {h.config.Auth.ClientSecret},
 	}
 	if req.Scope != "" {
 		form.Set("scope", req.Scope)
 	}
 	h.forwardTokenResponse(w, form, "/auth/refresh")
 }
 // forwardTokenResponse posts form data to the token endpoint and
 // forwards the response verbatim to the client.
 func (h *Handler) forwardTokenResponse(w http.ResponseWriter, form url.Values, logPath string) {
 	resp, err := h.authHTTP.PostForm(h.config.Auth.TokenURL, form)
 	if err != nil {
 		writeProblemDetail(w, http.StatusBadGateway,
 			"about:blank#bad-gateway", "Bad Gateway",
 			"identity provider unreachable", nil)
 		logging.Errorf("auth upstream error", err, map[string]string{
 			"path": logPath,
 		})
 		return
 	}
 	defer resp.Body.Close()
 	w.Header().Set("Content-Type", "application/json")
 	w.WriteHeader(resp.StatusCode)
 	io.Copy(w, resp.Body)
 }
@@ -0,0 +1,315 @@
 package proxy
 import (
 	"bytes"
 	"encoding/json"
 	"io"
 	"net/http"
 	"net/http/httptest"
 	"net/url"
 	"strings"
 	"testing"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
 )
 // stubAuthClient captures the form data sent and returns a canned response.
 type stubAuthClient struct {
 	lastForm   url.Values
 	statusCode int
 	body       string
 	err        error
 }
 func (s *stubAuthClient) PostForm(u string, data url.Values) (*http.Response, error) {
 	s.lastForm = data
 	if s.err != nil {
 		return nil, s.err
 	}
 	return &http.Response{
 		StatusCode: s.statusCode,
 		Body:       io.NopCloser(strings.NewReader(s.body)),
 		Header:     http.Header{"Content-Type": {"application/json"}},
 	}, nil
 }
 func newTestHandler(tokenURL, clientID, clientSecret string, client authClient) *Handler {
 	cfg := &config.Config{
 		Auth: config.AuthConfig{
 			TokenURL:     tokenURL,
 			ClientID:     clientID,
 			ClientSecret: clientSecret,
 		},
 	}
 	h := &Handler{
 		config:   cfg,
 		authHTTP: client,
 		routes:   make(map[string]*Route),
 		transports: make(map[string]*http.Transport),
 	}
 	return h
 }
 func TestAuthToken_Success(t *testing.T) {
 	stub := &stubAuthClient{
 		statusCode: 200,
 		body:       `{"access_token":"jwt.token.here","refresh_token":"refresh","expires_in":3600}`,
 	}
 	h := newTestHandler("https://auth.example.com/token/", "api-gw", "secret", stub)
 	body := `{"username":"rock","password":"pass123"}`
 	r := httptest.NewRequest("POST", "/auth/token", strings.NewReader(body))
 	w := httptest.NewRecorder()
 	h.handleAuthToken(w, r)
 	if w.Code != 200 {
 		t.Fatalf("expected 200, got %d: %s", w.Code, w.Body.String())
 	}
 	// Verify form sent to upstream
 	if stub.lastForm.Get("grant_type") != "password" {
 		t.Errorf("grant_type = %q, want password", stub.lastForm.Get("grant_type"))
 	}
 	if stub.lastForm.Get("username") != "rock" {
 		t.Errorf("username = %q, want rock", stub.lastForm.Get("username"))
 	}
 	if stub.lastForm.Get("client_id") != "api-gw" {
 		t.Errorf("client_id = %q, want api-gw", stub.lastForm.Get("client_id"))
 	}
 	if stub.lastForm.Get("client_secret") != "secret" {
 		t.Errorf("client_secret = %q, want secret", stub.lastForm.Get("client_secret"))
 	}
 	if stub.lastForm.Get("scope") != "openid roles permissions" {
 		t.Errorf("scope = %q, want default scope", stub.lastForm.Get("scope"))
 	}
 	// Verify response forwarded
 	var resp map[string]interface{}
 	json.NewDecoder(w.Body).Decode(&resp)
 	if resp["access_token"] != "jwt.token.here" {
 		t.Errorf("access_token not forwarded")
 	}
 }
 func TestAuthToken_CustomScope(t *testing.T) {
 	stub := &stubAuthClient{statusCode: 200, body: `{}`}
 	h := newTestHandler("https://auth.example.com/token/", "api-gw", "secret", stub)
 	body := `{"username":"rock","password":"pass","scope":"openid roles"}`
 	r := httptest.NewRequest("POST", "/auth/token", strings.NewReader(body))
 	w := httptest.NewRecorder()
 	h.handleAuthToken(w, r)
 	if stub.lastForm.Get("scope") != "openid roles" {
 		t.Errorf("scope = %q, want custom scope", stub.lastForm.Get("scope"))
 	}
 }
 func TestAuthToken_MissingUsername(t *testing.T) {
 	h := newTestHandler("https://auth.example.com/token/", "api-gw", "secret", &stubAuthClient{})
 	body := `{"password":"pass"}`
 	r := httptest.NewRequest("POST", "/auth/token", strings.NewReader(body))
 	w := httptest.NewRecorder()
 	h.handleAuthToken(w, r)
 	if w.Code != 400 {
 		t.Errorf("expected 400, got %d", w.Code)
 	}
 }
 func TestAuthToken_MissingPassword(t *testing.T) {
 	h := newTestHandler("https://auth.example.com/token/", "api-gw", "secret", &stubAuthClient{})
 	body := `{"username":"rock"}`
 	r := httptest.NewRequest("POST", "/auth/token", strings.NewReader(body))
 	w := httptest.NewRecorder()
 	h.handleAuthToken(w, r)
 	if w.Code != 400 {
 		t.Errorf("expected 400, got %d", w.Code)
 	}
 }
 func TestAuthToken_InvalidJSON(t *testing.T) {
 	h := newTestHandler("https://auth.example.com/token/", "api-gw", "secret", &stubAuthClient{})
 	r := httptest.NewRequest("POST", "/auth/token", strings.NewReader("not json"))
 	w := httptest.NewRecorder()
 	h.handleAuthToken(w, r)
 	if w.Code != 400 {
 		t.Errorf("expected 400, got %d", w.Code)
 	}
 }
 func TestAuthToken_WrongMethod(t *testing.T) {
 	h := newTestHandler("https://auth.example.com/token/", "api-gw", "secret", &stubAuthClient{})
 	r := httptest.NewRequest("GET", "/auth/token", nil)
 	w := httptest.NewRecorder()
 	h.handleAuthToken(w, r)
 	if w.Code != 405 {
 		t.Errorf("expected 405, got %d", w.Code)
 	}
 }
 func TestAuthToken_NotConfigured(t *testing.T) {
 	h := newTestHandler("", "", "", &stubAuthClient{})
 	body := `{"username":"rock","password":"pass"}`
 	r := httptest.NewRequest("POST", "/auth/token", strings.NewReader(body))
 	w := httptest.NewRecorder()
 	h.handleAuthToken(w, r)
 	if w.Code != 503 {
 		t.Errorf("expected 503, got %d", w.Code)
 	}
 }
 func TestAuthToken_UpstreamError(t *testing.T) {
 	stub := &stubAuthClient{err: io.ErrUnexpectedEOF}
 	h := newTestHandler("https://auth.example.com/token/", "api-gw", "secret", stub)
 	body := `{"username":"rock","password":"pass"}`
 	r := httptest.NewRequest("POST", "/auth/token", strings.NewReader(body))
 	w := httptest.NewRecorder()
 	h.handleAuthToken(w, r)
 	if w.Code != 502 {
 		t.Errorf("expected 502, got %d", w.Code)
 	}
 }
 func TestAuthToken_UpstreamRejectsCredentials(t *testing.T) {
 	stub := &stubAuthClient{
 		statusCode: 400,
 		body:       `{"error":"invalid_grant","error_description":"bad password"}`,
 	}
 	h := newTestHandler("https://auth.example.com/token/", "api-gw", "secret", stub)
 	body := `{"username":"rock","password":"wrong"}`
 	r := httptest.NewRequest("POST", "/auth/token", strings.NewReader(body))
 	w := httptest.NewRecorder()
 	h.handleAuthToken(w, r)
 	// Upstream error forwarded verbatim
 	if w.Code != 400 {
 		t.Errorf("expected 400 (forwarded), got %d", w.Code)
 	}
 	if !strings.Contains(w.Body.String(), "invalid_grant") {
 		t.Errorf("expected upstream error forwarded, got %s", w.Body.String())
 	}
 }
 // --- /auth/refresh tests ---
 func TestAuthRefresh_Success(t *testing.T) {
 	stub := &stubAuthClient{
 		statusCode: 200,
 		body:       `{"access_token":"new.jwt","refresh_token":"new.refresh","expires_in":3600}`,
 	}
 	h := newTestHandler("https://auth.example.com/token/", "api-gw", "secret", stub)
 	body := `{"refresh_token":"old.refresh"}`
 	r := httptest.NewRequest("POST", "/auth/refresh", strings.NewReader(body))
 	w := httptest.NewRecorder()
 	h.handleAuthRefresh(w, r)
 	if w.Code != 200 {
 		t.Fatalf("expected 200, got %d: %s", w.Code, w.Body.String())
 	}
 	if stub.lastForm.Get("grant_type") != "refresh_token" {
 		t.Errorf("grant_type = %q, want refresh_token", stub.lastForm.Get("grant_type"))
 	}
 	if stub.lastForm.Get("refresh_token") != "old.refresh" {
 		t.Errorf("refresh_token not sent")
 	}
 }
 func TestAuthRefresh_MissingToken(t *testing.T) {
 	h := newTestHandler("https://auth.example.com/token/", "api-gw", "secret", &stubAuthClient{})
 	r := httptest.NewRequest("POST", "/auth/refresh", strings.NewReader(`{}`))
 	w := httptest.NewRecorder()
 	h.handleAuthRefresh(w, r)
 	if w.Code != 400 {
 		t.Errorf("expected 400, got %d", w.Code)
 	}
 }
 func TestAuthRefresh_WrongMethod(t *testing.T) {
 	h := newTestHandler("https://auth.example.com/token/", "api-gw", "secret", &stubAuthClient{})
 	r := httptest.NewRequest("GET", "/auth/refresh", nil)
 	w := httptest.NewRecorder()
 	h.handleAuthRefresh(w, r)
 	if w.Code != 405 {
 		t.Errorf("expected 405, got %d", w.Code)
 	}
 }
 func TestAuthRefresh_NotConfigured(t *testing.T) {
 	h := newTestHandler("", "", "", &stubAuthClient{})
 	r := httptest.NewRequest("POST", "/auth/refresh", strings.NewReader(`{"refresh_token":"x"}`))
 	w := httptest.NewRecorder()
 	h.handleAuthRefresh(w, r)
 	if w.Code != 503 {
 		t.Errorf("expected 503, got %d", w.Code)
 	}
 }
 func TestAuthRefresh_ExpiredToken(t *testing.T) {
 	stub := &stubAuthClient{
 		statusCode: 401,
 		body:       `{"error":"invalid_grant","error_description":"token expired"}`,
 	}
 	h := newTestHandler("https://auth.example.com/token/", "api-gw", "secret", stub)
 	r := httptest.NewRequest("POST", "/auth/refresh", strings.NewReader(`{"refresh_token":"expired"}`))
 	w := httptest.NewRecorder()
 	h.handleAuthRefresh(w, r)
 	if w.Code != 401 {
 		t.Errorf("expected 401 (forwarded), got %d", w.Code)
 	}
 }
 // Verify no credentials are leaked in response bodies
 func TestAuthToken_NoCredentialLeak(t *testing.T) {
 	stub := &stubAuthClient{statusCode: 200, body: `{"access_token":"tok"}`}
 	h := newTestHandler("https://auth.example.com/token/", "api-gw", "super-secret", stub)
 	body := `{"username":"rock","password":"my-password"}`
 	r := httptest.NewRequest("POST", "/auth/token", bytes.NewReader([]byte(body)))
 	w := httptest.NewRecorder()
 	h.handleAuthToken(w, r)
 	respBody := w.Body.String()
 	if strings.Contains(respBody, "super-secret") {
 		t.Error("client_secret leaked in response")
 	}
 	if strings.Contains(respBody, "my-password") {
 		t.Error("password leaked in response")
 	}
 }
@@ -11,7 +11,7 @@ import (
 	"testing"
 	"time"
-	"github.com/Riotpiaole/homelab-frontend/internal/config"
+	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
 )
 // TestBodyBasedDispatch verifies that /v1/chat/completions routes based on model field.
@@ -381,3 +381,66 @@ func TestBodySizeCappedDispatch(t *testing.T) {
 		t.Errorf("expected 200 for reasonable body, got %d", resp.StatusCode)
 	}
 }
 // TestUpstreamModelRewrite verifies that the model field is rewritten when upstreamModel is set.
 func TestUpstreamModelRewrite(t *testing.T) {
 	var receivedModel string
 	upstreamServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		body, _ := io.ReadAll(r.Body)
 		var payload map[string]interface{}
 		json.Unmarshal(body, &payload)
 		receivedModel = payload["model"].(string)
 		w.Header().Set("Content-Type", "application/json")
 		w.WriteHeader(http.StatusOK)
 		fmt.Fprint(w, `{}`)
 	}))
 	defer upstreamServer.Close()
 	upstreamAddr := strings.TrimPrefix(upstreamServer.URL, "http://")
 	cfg := &config.Config{
 		Models: map[string]*config.ModelUpstream{
 			// Client sends "ornith:35b", upstream expects "qwen2.5:72b-instruct"
 			"ornith:35b": {
 				Name:          "ornith:35b",
 				Address:       upstreamAddr,
 				UpstreamModel: "qwen2.5:72b-instruct",
 			},
 			// No rewrite - upstream model same as client model
 			"reasoning": {
 				Name:    "reasoning",
 				Address: upstreamAddr,
 			},
 		},
 		Routes: make(map[string]*config.Route),
 	}
 	handler := New(cfg)
 	defer handler.Close()
 	server := httptest.NewServer(handler)
 	defer server.Close()
 	// Test 1: Model should be rewritten
 	requestBody := `{"model":"ornith:35b","messages":[{"role":"user","content":"hi"}]}`
 	resp, err := http.Post(server.URL+"/v1/chat/completions", "application/json", strings.NewReader(requestBody))
 	if err != nil {
 		t.Fatalf("request failed: %v", err)
 	}
 	resp.Body.Close()
 	if receivedModel != "qwen2.5:72b-instruct" {
 		t.Errorf("expected upstream to receive model 'qwen2.5:72b-instruct', got '%s'", receivedModel)
 	}
 	// Test 2: No rewrite when upstreamModel is empty
 	receivedModel = ""
 	requestBody = `{"model":"reasoning","messages":[{"role":"user","content":"hi"}]}`
 	resp, _ = http.Post(server.URL+"/v1/chat/completions", "application/json", strings.NewReader(requestBody))
 	resp.Body.Close()
 	if receivedModel != "reasoning" {
 		t.Errorf("expected upstream to receive model 'reasoning', got '%s'", receivedModel)
 	}
 }
@@ -9,7 +9,7 @@ import (
 	"testing"
 	"time"
-	"github.com/Riotpiaole/homelab-frontend/internal/config"
+	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
 )
 // TestBodySizeCapExact verifies that a body exactly at the cap is accepted.
@@ -10,7 +10,7 @@ import (
 	"strings"
 	"testing"
-	"github.com/Riotpiaole/homelab-frontend/internal/config"
+	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
 )
 // TestEmbeddingsPassthroughNoRewrite verifies /v1/embeddings is not rewritten
@@ -0,0 +1,333 @@
 package proxy
 import (
 	"bufio"
 	"context"
 	"fmt"
 	"io"
 	"math"
 	"net/http"
 	"strconv"
 	"strings"
 	"sync"
 	"time"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/logging"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/observability"
 )
 // Metric names published by the vLLM engine. Admission is gated on these
 // rather than on a per-pod semaphore: every gateway replica reads the same
 // engine, so the limit is global by construction (#64).
 const (
 	metricRequestsRunning = "vllm:num_requests_running"
 	metricRequestsWaiting = "vllm:num_requests_waiting"
 	metricKVCacheUsage    = "vllm:kv_cache_usage_perc"
 	// enginePollInterval is how often each backend's /metrics is scraped.
 	enginePollInterval = 2 * time.Second
 	// engineStaleThreshold is the number of consecutive failed polls after
 	// which the state is marked unhealthy and admission fails open.
 	engineStaleThreshold = 3
 	// engineMetricsTimeout bounds a single scrape.
 	engineMetricsTimeout = 2 * time.Second
 )
 // EngineState is the gateway's view of one vLLM engine, mirrored from its
 // own metrics endpoint.
 type EngineState struct {
 	Running   int64
 	Waiting   int64
 	KVUsage   float64
 	UpdatedAt time.Time
 	Healthy   bool
 }
 // InFlight returns the number of requests the engine currently holds:
 // running plus waiting.
 func (s EngineState) InFlight() int64 {
 	return s.Running + s.Waiting
 }
 // EngineObserver polls one vLLM backend's /metrics and publishes the gauges
 // admission is gated on. Healthy is false until the first successful poll and
 // after engineStaleThreshold consecutive failures.
 type EngineObserver struct {
 	addr     string
 	interval time.Duration
 	client   *http.Client
 	mu       sync.Mutex
 	state    EngineState
 	failures int
 	degraded bool
 	tick     chan struct{}
 }
 // NewEngineObserver creates an observer for the backend at addr.
 func NewEngineObserver(addr string, interval time.Duration) *EngineObserver {
 	return &EngineObserver{
 		addr:     addr,
 		interval: interval,
 		// Own client: the proxy transports carry socket options and connect
 		// timeouts tuned for inference, not for a short metrics scrape.
 		client: &http.Client{Timeout: engineMetricsTimeout},
 		tick:   make(chan struct{}),
 	}
 }
 // Start launches the polling goroutine. It returns immediately; the goroutine
 // exits when ctx is cancelled.
 func (o *EngineObserver) Start(ctx context.Context) {
 	go func() {
 		ticker := time.NewTicker(o.interval)
 		defer ticker.Stop()
 		// The first scrape waits one interval rather than firing at Start().
 		// Scraping immediately makes the gateway contact every observed backend
 		// before any request needs one, which is wasted work and a surprising
 		// side effect for anything asserting on upstream traffic. State is
 		// unknown until the first poll, and unknown fails open, so the deferral
 		// costs at most one interval of ungated admission. The startup
 		// self-check (decision Q21) still runs, on that first tick.
 		startup := true
 		for {
 			select {
 			case <-ctx.Done():
 				return
 			case <-ticker.C:
 				o.poll(ctx, startup)
 				startup = false
 			}
 		}
 	}()
 }
 // Get returns the most recent engine state.
 func (o *EngineObserver) Get() EngineState {
 	o.mu.Lock()
 	defer o.mu.Unlock()
 	return o.state
 }
 // Tick returns a channel that is closed and replaced after every successful
 // poll, waking requests parked on engine admission.
 func (o *EngineObserver) Tick() <-chan struct{} {
 	o.mu.Lock()
 	defer o.mu.Unlock()
 	return o.tick
 }
 // Degraded reports whether the startup self-check found the metrics feed
 // unusable (parse failure or missing series).
 func (o *EngineObserver) Degraded() bool {
 	o.mu.Lock()
 	defer o.mu.Unlock()
 	return o.degraded
 }
 // Snapshot returns the latest state together with the tick channel that the
 // next successful poll will close. Both are read under one lock on purpose:
 // calling Get and Tick separately can miss the wakeup that lands between the
 // two calls, parking a request for an extra poll interval.
 func (o *EngineObserver) Snapshot() (EngineState, <-chan struct{}) {
 	o.mu.Lock()
 	defer o.mu.Unlock()
 	return o.state, o.tick
 }
 // markDegraded records whether the metrics feed is currently unusable and
 // mirrors that into observer_degraded. It is cleared on the next parseable
 // scrape, so one truncated response cannot pin the gauge for the process
 // lifetime while metric-name drift after the first poll is still reported.
 func (o *EngineObserver) markDegraded(v bool) {
 	o.mu.Lock()
 	changed := o.degraded != v
 	o.degraded = v
 	o.mu.Unlock()
 	if changed {
 		observability.Global().SetObserverDegraded(v)
 	}
 }
 // poll scrapes /metrics once. startup marks the first poll, whose failure is a
 // self-diagnosis signal rather than a transient blip.
 func (o *EngineObserver) poll(ctx context.Context, startup bool) {
 	req, err := http.NewRequestWithContext(ctx, http.MethodGet, "http://"+o.addr+"/metrics", nil)
 	if err != nil {
 		o.recordFailure()
 		logging.Warnf("engine metrics request build failed", map[string]string{
 			"address": o.addr,
 			"err":     err.Error(),
 		})
 		return
 	}
 	resp, err := o.client.Do(req)
 	if err != nil {
 		o.recordFailure()
 		logging.Warnf("engine metrics scrape failed", map[string]string{
 			"address": o.addr,
 			"err":     err.Error(),
 		})
 		return
 	}
 	defer resp.Body.Close()
 	if resp.StatusCode != http.StatusOK {
 		o.recordFailure()
 		logging.Warnf("engine metrics scrape returned non-200", map[string]string{
 			"address": o.addr,
 			"status":  strconv.Itoa(resp.StatusCode),
 		})
 		return
 	}
 	running, waiting, kvUsage, err := ParseEngineMetrics(resp.Body)
 	if err != nil {
 		// Metric-name drift must be loud, never a silent fall-back to fail-open
 		// admission (decision Q21). The gauge tracks current state, so it clears
 		// on the next parseable scrape instead of pinning for the pod's life.
 		o.markDegraded(true)
 		if startup {
 			logging.Errorf("engine metrics unusable at startup", err, map[string]string{
 				"address": o.addr,
 			})
 		} else {
 			logging.Warnf("engine metrics parse failed", map[string]string{
 				"address": o.addr,
 				"err":     err.Error(),
 			})
 		}
 		o.recordFailure()
 		return
 	}
 	o.markDegraded(false)
 	o.recordSuccess(running, waiting, kvUsage)
 }
 // recordSuccess stores a fresh reading and wakes parked waiters.
 func (o *EngineObserver) recordSuccess(running, waiting int64, kvUsage float64) {
 	o.mu.Lock()
 	o.state = EngineState{
 		Running:   running,
 		Waiting:   waiting,
 		KVUsage:   kvUsage,
 		UpdatedAt: time.Now(),
 		Healthy:   true,
 	}
 	o.failures = 0
 	close(o.tick)
 	o.tick = make(chan struct{})
 	o.mu.Unlock()
 	m := observability.Global()
 	m.SetVLLMRequestsRunning(running)
 	m.SetVLLMKVUsagePerc(kvUsage)
 }
 // recordFailure counts a failed poll and, on the third consecutive failure,
 // marks the state unhealthy and counts the staleness transition once — not
 // once per failed poll. Last known values are kept.
 func (o *EngineObserver) recordFailure() {
 	o.mu.Lock()
 	o.failures++
 	stale := o.failures == engineStaleThreshold
 	if o.failures >= engineStaleThreshold {
 		o.state.Healthy = false
 	}
 	failures := o.failures
 	o.mu.Unlock()
 	if stale {
 		observability.Global().IncrEngineStateStale()
 		logging.Warnf("engine metrics stale; admission is failing open", map[string]string{
 			"address":  o.addr,
 			"failures": strconv.Itoa(failures),
 		})
 	}
 }
 // ParseEngineMetrics extracts the running, waiting and KV-cache-usage gauges
 // from a vLLM Prometheus exposition body. Comment lines, unrelated series and
 // non-finite samples are ignored; values are summed across repeated label sets.
 // It returns an error naming any of the three series that is absent.
 func ParseEngineMetrics(r io.Reader) (running int64, waiting int64, kvUsage float64, err error) {
 	scanner := bufio.NewScanner(r)
 	// The real exposition body is large; give the scanner room per line.
 	scanner.Buffer(make([]byte, 0, 64*1024), 1024*1024)
 	var hasRunning, hasWaiting, hasKV bool
 	for scanner.Scan() {
 		line := strings.TrimSpace(scanner.Text())
 		if line == "" || strings.HasPrefix(line, "#") {
 			continue
 		}
 		name, value, ok := splitMetricSample(line)
 		if !ok {
 			continue
 		}
 		switch name {
 		case metricRequestsRunning, metricRequestsWaiting, metricKVCacheUsage:
 		default:
 			continue
 		}
 		f, err := strconv.ParseFloat(value, 64)
 		if err != nil || math.IsNaN(f) || math.IsInf(f, 0) {
 			continue
 		}
 		switch name {
 		case metricRequestsRunning:
 			running += int64(f)
 			hasRunning = true
 		case metricRequestsWaiting:
 			waiting += int64(f)
 			hasWaiting = true
 		case metricKVCacheUsage:
 			kvUsage += f
 			hasKV = true
 		}
 	}
 	if err := scanner.Err(); err != nil {
 		return 0, 0, 0, fmt.Errorf("read engine metrics: %w", err)
 	}
 	var missing []string
 	if !hasRunning {
 		missing = append(missing, metricRequestsRunning)
 	}
 	if !hasWaiting {
 		missing = append(missing, metricRequestsWaiting)
 	}
 	if !hasKV {
 		missing = append(missing, metricKVCacheUsage)
 	}
 	if len(missing) > 0 {
 		return 0, 0, 0, fmt.Errorf("engine metrics missing series: %s", strings.Join(missing, ", "))
 	}
 	return running, waiting, kvUsage, nil
 }
 // splitMetricSample splits one Prometheus exposition line into its metric name
 // and its first sample value. Lines without a value are reported as not ok.
 func splitMetricSample(line string) (name, value string, ok bool) {
 	end := strings.IndexAny(line, "{ \t")
 	if end <= 0 {
 		return "", "", false
 	}
 	name = line[:end]
 	rest := line[end:]
 	if rest[0] == '{' {
 		closeBrace := strings.LastIndex(rest, "}")
 		if closeBrace < 0 {
 			return "", "", false
 		}
 		rest = rest[closeBrace+1:]
 	}
 	fields := strings.Fields(rest)
 	if len(fields) == 0 {
 		return "", "", false
 	}
 	return name, fields[0], true
 }
@@ -8,7 +8,7 @@ import (
 	"testing"
 	"time"
-	"github.com/Riotpiaole/homelab-frontend/internal/config"
+	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
 )
 // TestHeaderHygiene verifies that headers are properly filtered and forwarded.
@@ -0,0 +1,125 @@
 package proxy
 import (
 	"bufio"
 	"fmt"
 	"net"
 	"net/http"
 	"strings"
 	"time"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/observability"
 )
 // ResponseWriterWrapper wraps an http.ResponseWriter to capture per-request LLM
 // latency metrics (TTFT, ITL, generated tokens) while a streaming response is
 // copied from the upstream by httputil.ReverseProxy.
 //
 // Only server-sent-event responses are measured. A non-streaming completion is
 // written in a single Write, so recording it would emit one "TTFT" sample equal
 // to the whole request latency and no ITL samples at all — numbers that look
 // plausible but mean nothing.
 type ResponseWriterWrapper struct {
 	writer        http.ResponseWriter
 	statusCode    int
 	metrics       *observability.Metrics
 	model         string
 	startTime     time.Time
 	firstByteTime time.Time
 	lastWriteTime time.Time
 	ttftRecorded  bool
 	streamChecked bool
 	streaming     bool
 }
 // NewResponseWriterWrapper creates a wrapper for response writer.
 // startTime must be the time the request entered the gateway, not the time this
 // wrapper was constructed, otherwise TTFT measures the wrong interval.
 func NewResponseWriterWrapper(w http.ResponseWriter, model string, metrics *observability.Metrics, startTime time.Time) *ResponseWriterWrapper {
 	return &ResponseWriterWrapper{
 		writer:     w,
 		model:      model,
 		metrics:    metrics,
 		startTime:  startTime,
 		statusCode: 200,
 	}
 }
 // Header implements http.ResponseWriter
 func (w *ResponseWriterWrapper) Header() http.Header {
 	return w.writer.Header()
 }
 // isStreaming reports whether this is an SSE response. Resolved once from the
 // Content-Type header, which ReverseProxy has already set before the first write.
 func (w *ResponseWriterWrapper) isStreaming() bool {
 	if !w.streamChecked {
 		w.streamChecked = true
 		w.streaming = strings.Contains(w.writer.Header().Get("Content-Type"), "text/event-stream")
 	}
 	return w.streaming
 }
 // countSSETokens counts generated tokens in a chunk of an SSE stream. These
 // upstreams emit one `data:` event per token, so the event count is the token
 // count; the `[DONE]` terminator is not a token.
 func countSSETokens(b []byte) int64 {
 	var n int64
 	for _, line := range strings.Split(string(b), "\n") {
 		line = strings.TrimSpace(line)
 		if strings.HasPrefix(line, "data:") && !strings.HasPrefix(line, "data: [DONE]") {
 			n++
 		}
 	}
 	return n
 }
 // Write implements http.ResponseWriter
 func (w *ResponseWriterWrapper) Write(b []byte) (int, error) {
 	if len(b) > 0 && w.isStreaming() {
 		now := time.Now()
 		if !w.ttftRecorded {
 			w.metrics.RecordTTFT(w.model, now.Sub(w.startTime).Milliseconds())
 			w.ttftRecorded = true
 			w.firstByteTime = now
 		} else if itl := now.Sub(w.lastWriteTime).Milliseconds(); itl > 0 {
 			// Only record positive ITL: a zero means two chunks landed in the
 			// same millisecond, which carries no timing information.
 			w.metrics.RecordITL(w.model, itl)
 		}
 		w.lastWriteTime = now
 		if n := countSSETokens(b); n > 0 {
 			w.metrics.RecordTokenCount(w.model, n)
 		}
 	}
 	return w.writer.Write(b)
 }
 // WriteHeader implements http.ResponseWriter
 func (w *ResponseWriterWrapper) WriteHeader(statusCode int) {
 	w.statusCode = statusCode
 	w.writer.WriteHeader(statusCode)
 }
 // Flush implements http.Flusher
 func (w *ResponseWriterWrapper) Flush() {
 	if flusher, ok := w.writer.(http.Flusher); ok {
 		flusher.Flush()
 	}
 }
 // Hijack implements http.Hijacker for streaming
 func (w *ResponseWriterWrapper) Hijack() (net.Conn, *bufio.ReadWriter, error) {
 	if hijacker, ok := w.writer.(http.Hijacker); ok {
 		return hijacker.Hijack()
 	}
 	return nil, nil, fmt.Errorf("response writer does not implement Hijacker")
 }
 // Unwrap exposes the underlying writer to http.ResponseController so optional
 // capabilities (Flush, Hijack, deadlines) keep working through the wrapper.
 func (w *ResponseWriterWrapper) Unwrap() http.ResponseWriter {
 	return w.writer
 }
@@ -0,0 +1,171 @@
 package proxy
 import (
 	"fmt"
 	"io"
 	"net/http"
 	"net/http/httptest"
 	"regexp"
 	"strings"
 	"testing"
 	"time"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/observability"
 )
 // exportMetrics renders the Prometheus text exposition for m.
 func exportMetrics(m *observability.Metrics) string {
 	return observability.NewPrometheusExporter(m).Export()
 }
 // requireSeries asserts the exporter emitted a sample line with the exact value.
 func requireSeries(t *testing.T, out, want string) {
 	t.Helper()
 	for _, line := range strings.Split(out, "\n") {
 		if strings.TrimSpace(line) == want {
 			return
 		}
 	}
 	t.Errorf("missing metrics series %q\n--- got ---\n%s", want, out)
 }
 // TestResponseWriterWrapperRecordsSSEMetrics guards the regression where the
 // LLM latency wrapper existed but was never constructed, leaving
 // llm_ttft_seconds / llm_itl_seconds / llm_tokens_total as HELP-only stubs.
 func TestResponseWriterWrapperRecordsSSEMetrics(t *testing.T) {
 	m := observability.NewMetrics()
 	rec := httptest.NewRecorder()
 	rec.Header().Set("Content-Type", "text/event-stream")
 	w := NewResponseWriterWrapper(rec, "reasoning", m, time.Now().Add(-50*time.Millisecond))
 	if _, err := w.Write([]byte("data: {\"token\":\"a\"}\n\n")); err != nil {
 		t.Fatalf("write: %v", err)
 	}
 	time.Sleep(5 * time.Millisecond)
 	if _, err := w.Write([]byte("data: {\"token\":\"b\"}\n\n")); err != nil {
 		t.Fatalf("write: %v", err)
 	}
 	// The terminator is not a generated token.
 	if _, err := w.Write([]byte("data: [DONE]\n\n")); err != nil {
 		t.Fatalf("write: %v", err)
 	}
 	out := exportMetrics(m)
 	requireSeries(t, out, `llm_ttft_seconds_count{model="reasoning"} 1`)
 	requireSeries(t, out, `llm_itl_seconds_count{model="reasoning"} 1`)
 	requireSeries(t, out, `llm_tokens_total{model="reasoning"} 2`)
 }
 // TestResponseWriterWrapperIgnoresNonStreaming verifies a single-shot JSON
 // response does not produce a bogus TTFT sample equal to full request latency.
 func TestResponseWriterWrapperIgnoresNonStreaming(t *testing.T) {
 	m := observability.NewMetrics()
 	rec := httptest.NewRecorder()
 	rec.Header().Set("Content-Type", "application/json")
 	w := NewResponseWriterWrapper(rec, "reasoning", m, time.Now().Add(-50*time.Millisecond))
 	if _, err := w.Write([]byte(`{"choices":[]}`)); err != nil {
 		t.Fatalf("write: %v", err)
 	}
 	out := exportMetrics(m)
 	if strings.Contains(out, `llm_ttft_seconds_count{model="reasoning"}`) {
 		t.Errorf("non-streaming response recorded TTFT\n--- got ---\n%s", out)
 	}
 	if strings.Contains(out, `llm_tokens_total{model="reasoning"}`) {
 		t.Errorf("non-streaming response recorded tokens\n--- got ---\n%s", out)
 	}
 }
 // TestResponseWriterWrapperPreservesStreaming verifies the wrapper stays
 // transparent: bytes reach the client and Flush still works, so wrapping the
 // writer cannot silently break SSE (issue #33).
 func TestResponseWriterWrapperPreservesStreaming(t *testing.T) {
 	m := observability.NewMetrics()
 	rec := httptest.NewRecorder()
 	rec.Header().Set("Content-Type", "text/event-stream")
 	w := NewResponseWriterWrapper(rec, "reasoning", m, time.Now())
 	payload := "data: {\"token\":\"a\"}\n\n"
 	if _, err := w.Write([]byte(payload)); err != nil {
 		t.Fatalf("write: %v", err)
 	}
 	w.Flush()
 	if got := rec.Body.String(); got != payload {
 		t.Errorf("body = %q, want %q", got, payload)
 	}
 	if !rec.Flushed {
 		t.Error("Flush did not reach the underlying writer")
 	}
 }
 // TestHandlerRecordsLLMMetricsForStreaming is the end-to-end guard: it drives a
 // real streaming request through the Handler, so it fails if the wrapper is ever
 // constructed nowhere (the original defect) rather than merely being broken.
 func TestHandlerRecordsLLMMetricsForStreaming(t *testing.T) {
 	// Unique model name keeps the observations isolated in the global registry.
 	model := fmt.Sprintf("metrics-test-%d", time.Now().UnixNano())
 	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Type", "text/event-stream")
 		w.WriteHeader(http.StatusOK)
 		rc := http.NewResponseController(w)
 		for _, tok := range []string{"a", "b", "c"} {
 			time.Sleep(2 * time.Millisecond) // guarantee distinct ITL samples
 			fmt.Fprintf(w, "data: {\"token\":%q}\n\n", tok)
 			if err := rc.Flush(); err != nil {
 				return
 			}
 		}
 		fmt.Fprint(w, "data: [DONE]\n\n")
 		_ = rc.Flush()
 	}))
 	defer upstream.Close()
 	cfg := &config.Config{
 		Models: map[string]*config.ModelUpstream{
 			model: {
 				Name:    model,
 				Address: strings.TrimPrefix(upstream.URL, "http://"),
 				Path:    "/v1/chat/completions",
 			},
 		},
 		Routes: make(map[string]*config.Route),
 	}
 	handler := New(cfg)
 	defer handler.Close()
 	srv := httptest.NewServer(handler)
 	defer srv.Close()
 	body := fmt.Sprintf(`{"model":%q,"stream":true,"messages":[{"role":"user","content":"hi"}]}`, model)
 	resp, err := http.Post(srv.URL+"/v1/chat/completions", "application/json", strings.NewReader(body))
 	if err != nil {
 		t.Fatalf("request failed: %v", err)
 	}
 	defer resp.Body.Close()
 	if resp.StatusCode != http.StatusOK {
 		t.Fatalf("status = %d, want 200", resp.StatusCode)
 	}
 	if _, err := io.ReadAll(resp.Body); err != nil {
 		t.Fatalf("read body: %v", err)
 	}
 	out := exportMetrics(observability.Global())
 	requireSeries(t, out, fmt.Sprintf(`llm_ttft_seconds_count{model=%q} 1`, model))
 	requireSeries(t, out, fmt.Sprintf(`llm_tokens_total{model=%q} 3`, model))
 	itlCount := regexp.MustCompile(fmt.Sprintf(`llm_itl_seconds_count\{model=%q\} (\d+)`, model))
 	match := itlCount.FindStringSubmatch(out)
 	if match == nil {
 		t.Errorf("no llm_itl_seconds samples recorded for %s\n--- got ---\n%s", model, out)
 	} else if match[1] == "0" {
 		t.Errorf("llm_itl_seconds_count = 0, want > 0")
 	}
 }
@@ -10,7 +10,7 @@ import (
 	"testing"
 	"time"
-	"github.com/Riotpiaole/homelab-frontend/internal/config"
+	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
 )
 // ModelListResponse represents the response shape for GET /v1/models
@@ -2,19 +2,30 @@
 package proxy
 import (
 	"bytes"
 	"context"
 	"encoding/json"
 	"errors"
 	"fmt"
 	"io"
 	"net"
 	"net/http"
 	"net/http/httputil"
 	"net/url"
 	"os"
 	"sort"
 	"strconv"
 	"strings"
 	"sync"
 	"syscall"
 	"time"
-	"github.com/Riotpiaole/homelab-frontend/internal/config"
+	"forgejo.riotpiao.com/rock/homelab-frontend/internal/auth"
-	"github.com/Riotpiaole/homelab-frontend/internal/logging"
+	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/identity"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/logging"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/observability"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/tracing"
 )
 // Handler is a reverse proxy that routes requests to configured upstreams.
@@ -24,18 +35,33 @@ type Handler struct {
 	transports map[string]*http.Transport
 	// config holds the gateway configuration (for model registry, etc.)
 	config *config.Config
 	// jwtValidator validates JWT tokens for authenticated endpoints
 	jwtValidator *auth.Validator
 	// authHTTP is the HTTP client for token exchange with the identity provider.
 	authHTTP authClient
 	// Default timeouts for synthesized routes (model-based dispatch)
 	defaultConnectTimeout time.Duration
 	defaultReadTimeout    time.Duration
 	defaultWriteTimeout   time.Duration
 	defaultMaxBodySize    int64
 	// CAG: per-model backend schedulers for cache-aware routing (#45/#46)
 	schedulers  map[string]*Scheduler
 	// CAG: delay applied to warmup requests before queue entry (#45)
 	warmupDelay time.Duration
 	// engineObservers polls each model backend's /metrics for admission (#64)
 	engineObservers map[string]*EngineObserver
 	// maxBodyBytes caps synthesized model-route request bodies (MAX_BODY_BYTES)
 	maxBodyBytes int64
 	// transportsMu guards h.transports for goroutine-safe reads/writes.
 	transportsMu sync.RWMutex
 }
 // Route represents a reverse proxy route.
 type Route struct {
-	Name     string
+	Name      string
-	Upstream *config.Upstream
+	ModelName string // non-empty for model-based routes; used for scheduler lookup
-	Director func(*http.Request)
+	Upstream  *config.Upstream
 	Director  func(*http.Request)
 	Transport *http.Transport
 }
@@ -72,11 +98,127 @@ func New(cfg *config.Config) *Handler {
 		defaultMaxBodySize:    100 * 1024 * 1024,
 	}
 	// Initialize JWT validator if auth is enabled
 	if cfg.Auth.Enabled && cfg.Auth.JWKSURL != "" {
 		h.jwtValidator = auth.NewValidator(
 			cfg.Auth.Issuer,
 			cfg.Auth.Audience,
 			cfg.Auth.JWKSURL,
 		)
 	}
 	if cfg.Auth.TokenURL != "" {
 		h.authHTTP = newAuthClient()
 	}
 	// CAG: warmup delay from env (#45)
 	warmupMs := int64(500)
 	if v := os.Getenv("WARMUP_DELAY_MS"); v != "" {
 		if n, err := strconv.ParseInt(v, 10, 64); err == nil && n >= 0 {
 			warmupMs = n
 		}
 	}
 	h.warmupDelay = time.Duration(warmupMs) * time.Millisecond
 	// CAG: per-model backend schedulers (#45/#46)
 	maxSlots := 4
 	if v := os.Getenv("VLLM_MAX_NUM_SEQS"); v != "" {
 		if n, err := strconv.Atoi(v); err == nil && n > 0 {
 			maxSlots = n
 		}
 	}
 	maxQueue := 8
 	if v := os.Getenv("VLLM_MAX_QUEUE_DEPTH"); v != "" {
 		if n, err := strconv.Atoi(v); err == nil && n > 0 {
 			maxQueue = n
 		}
 	}
 	// Issue #64: engine-wide admission thresholds. MaxInFlight defaults to the
 	// same value as VLLM_MAX_NUM_SEQS; the observers below read the engine's
 	// own gauges, which every replica shares.
 	admissionMaxInFlight := maxSlots
 	if v := os.Getenv("ADMISSION_MAX_INFLIGHT"); v != "" {
 		if n, err := strconv.Atoi(v); err == nil && n > 0 {
 			admissionMaxInFlight = n
 		}
 	}
 	admissionMaxKVUsage := 0.90
 	if v := os.Getenv("ADMISSION_MAX_KV_USAGE"); v != "" {
 		if f, err := strconv.ParseFloat(v, 64); err == nil && f > 0 {
 			admissionMaxKVUsage = f
 		}
 	}
 	maxParkSeconds := 120
 	if v := os.Getenv("ADMISSION_MAX_PARK_SECONDS"); v != "" {
 		if n, err := strconv.Atoi(v); err == nil && n > 0 {
 			maxParkSeconds = n
 		}
 	}
 	h.maxBodyBytes = 1048576
 	if v := os.Getenv("MAX_BODY_BYTES"); v != "" {
 		if n, err := strconv.ParseInt(v, 10, 64); err == nil && n > 0 {
 			h.maxBodyBytes = n
 		}
 	}
 	limits := AdmissionLimits{
 		MaxInFlight: admissionMaxInFlight,
 		MaxKVUsage:  admissionMaxKVUsage,
 		MaxPark:     time.Duration(maxParkSeconds) * time.Second,
 	}
 	// Issue #64: only backends that actually publish the vLLM scheduler gauges
 	// may be observed. `reasoning` is the only vLLM engine here; ornith and
 	// qwen-cpu are Ollama and embeddings/rerank are TEI, none of which export
 	// vllm:* series. Observing them would trip the startup self-check and hold
 	// observer_degraded at 1 forever. Unset (the default) observes nothing and
 	// leaves admission exactly as it was before this change.
 	observeModels := make(map[string]bool)
 	for _, name := range strings.Split(os.Getenv("ADMISSION_OBSERVE_MODELS"), ",") {
 		if name = strings.TrimSpace(name); name != "" {
 			observeModels[name] = true
 		}
 	}
 	h.engineObservers = make(map[string]*EngineObserver)
 	h.schedulers = make(map[string]*Scheduler)
 	for modelName, model := range cfg.Models {
 		addrs := model.AllAddresses()
 		if len(addrs) == 0 {
 			continue
 		}
 		if observeModels[modelName] {
 			for _, addr := range addrs {
 				if _, ok := h.engineObservers[addr]; !ok {
 					h.engineObservers[addr] = NewEngineObserver(addr, enginePollInterval)
 				}
 			}
 		}
 		h.schedulers[modelName] = NewScheduler(addrs, maxSlots, maxQueue, h.engineObservers, limits)
 	}
 	// The handler has no request-path lifecycle to hang cancellation on, so the
 	// observers poll for the lifetime of the process.
 	for _, o := range h.engineObservers {
 		o.Start(context.Background())
 	}
 	// Pre-populate transports for all scheduler backends at startup (single-threaded).
 	// getOrCreateTransport is not goroutine-safe; pre-populating avoids concurrent writes.
 	for _, model := range cfg.Models {
 		for _, addr := range model.AllAddresses() {
 			h.getOrCreateTransport(addr, &config.Upstream{
 				ConnectTimeout: h.defaultConnectTimeout,
 				ReadTimeout:    h.defaultReadTimeout,
 				WriteTimeout:   h.defaultWriteTimeout,
 			})
 		}
 	}
 	for name, route := range cfg.Routes {
 		// Create a transport per unique upstream address for connection reuse
 		transport := h.getOrCreateTransport(route.Upstream.Address, &route.Upstream)
-		upstreamURL, _ := url.Parse("http://" + route.Upstream.Address)
+		upstreamURL := &url.URL{Scheme: "http", Host: route.Upstream.Address}
 		r := &Route{
 			Name:      name,
@@ -95,7 +237,16 @@ func New(cfg *config.Config) *Handler {
 // getOrCreateTransport returns a shared http.Transport for the given upstream address.
 // This ensures connections are pooled and reused across requests to the same upstream.
 func (h *Handler) getOrCreateTransport(addr string, up *config.Upstream) *http.Transport {
 	h.transportsMu.RLock()
 	if t, ok := h.transports[addr]; ok {
 		h.transportsMu.RUnlock()
 		return t
 	}
 	h.transportsMu.RUnlock()
 	h.transportsMu.Lock()
 	defer h.transportsMu.Unlock()
 	if t, ok := h.transports[addr]; ok { // double-check after write lock
 		return t
 	}
@@ -107,6 +258,15 @@ func (h *Handler) getOrCreateTransport(addr string, up *config.Upstream) *http.T
 	dialer := &net.Dialer{
 		Timeout:   up.ConnectTimeout,
 		KeepAlive: 30 * time.Second,
 		// Issue #31: TCP_NODELAY disables Nagle's algorithm, reducing latency
 		// for streaming responses by sending small packets immediately instead of
 		// waiting for larger batches. Critical for low-latency LLM token streaming.
 		Control: func(network, address string, c syscall.RawConn) error {
 			return c.Control(func(fd uintptr) {
 				// TCP_NODELAY disables Nagle's algorithm for immediate packet transmission
 				_ = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_NODELAY, 1)
 			})
 		},
 	}
 	transport := &http.Transport{
@@ -114,8 +274,15 @@ func (h *Handler) getOrCreateTransport(addr string, up *config.Upstream) *http.T
 		DialContext:     dialer.DialContext,
 		MaxIdleConns:    100,
 		IdleConnTimeout: 90 * time.Second,
 		// Issue #32: Increase per-host connection limit to support HTTP/2 multiplexing.
 		// With HTTP/2, we can serve many concurrent streams over fewer connections,
 		// but we still allow more connections for better resource utilization.
 		MaxConnsPerHost: 10,
 		// Allow persistent connections
 		DisableKeepAlives: false,
 		// Issue #31: Enable HTTP/2 for client connections to support multiplexing.
 		// This allows concurrent requests to stream simultaneously with better flow control.
 		ForceAttemptHTTP2: true,
 	}
 	// Store the upstream config for use in the handler
@@ -128,7 +295,7 @@ func (h *Handler) getOrCreateTransport(addr string, up *config.Upstream) *http.T
 	}
 	h.transports[addr] = transport
-	return transport
+	return transport // written under transportsMu write lock
 }
 // directorFunc modifies the request to be sent to the upstream.
@@ -214,63 +381,263 @@ func writeProblemDetail(w http.ResponseWriter, status int, problemType, title, d
 // ServeHTTP implements http.Handler.
 func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	// Captured before any work so TTFT measures from the moment the gateway
 	// accepted the request, not from when the upstream response is copied.
 	requestStart := time.Now()
 	if h.handleAuthEndpoint(w, r) {
 		return
 	}
 	// Handle /v1/models endpoint (no routing needed, derived from config)
 	if r.URL.Path == "/v1/models" && r.Method == "GET" {
 		h.handleModelsEndpoint(w, r)
 		return
 	}
-	// Try to find a matching route (including body-based dispatch for /v1/chat/completions)
+	// Resolve route; handles validation errors and 404.
 	route, ok := h.routeOrError(w, r)
 	if !ok {
 		return
 	}
 	// Strip spoofed identity headers from all inbound requests.
 	// Must happen before any routing — even unauthenticated paths.
 	identity.StripIncoming(r)
 	// JWT Authentication for /v1/* endpoints.
 	if !h.authenticateV1(w, r) {
 		return
 	}
 	// Enforce request body size cap for non-chat routes.
 	if !h.enforceBodyLimit(w, r, route) {
 		return
 	}
 	// CAG: warmup deprioritisation + per-backend semaphore (issues #45/#46).
 	cacheKey := r.Header.Get("X-Poimen-Cache-Key")
 	sched := h.schedulers[route.ModelName]
 	proxy, backend, ok := h.setupCAGProxy(r.Context(), w, r, route, sched, cacheKey)
 	if !ok {
 		return
 	}
 	if backend != nil {
 		defer backend.Release()
 	}
 	// For streaming responses (SSE, chunked), disable buffering. Issue #33.
 	w.Header().Set("X-Accel-Buffering", "no")
 	// Capture per-request LLM latency metrics (TTFT/ITL/tokens) while the
 	// response is copied from the upstream. Inert for non-SSE responses.
 	var respWriter http.ResponseWriter = w
 	if route.ModelName != "" {
 		respWriter = NewResponseWriterWrapper(w, route.ModelName, observability.Global(), requestStart)
 	}
 	proxy.ServeHTTP(respWriter, r)
 }
 // applyWarmup strips the X-Poimen-Warmup header, delays the request while
 // honouring context cancellation, and records the metric.
 // Returns false if the context was cancelled during the delay (caller must abort).
 func (h *Handler) applyWarmup(ctx context.Context, r *http.Request) bool {
 	if r.Header.Get("X-Poimen-Warmup") != "true" {
 		return true
 	}
 	r.Header.Del("X-Poimen-Warmup")
 	r.Header.Set("X-Priority", "low")
 	select {
 	case <-time.After(h.warmupDelay):
 	case <-ctx.Done():
 		return false
 	}
 	observability.Global().IncrWarmupDelayed()
 	return true
 }
 // acquireScheduledBackend selects a backend from sched, applies warmup
 // deprioritisation, acquires a concurrency slot, and patches route when the
 // selected backend differs from the config default. It returns the backend
 // to Release (caller must defer), the (possibly patched) route, whether SSE
 // headers were already written while parking, and ok=true.
 // If the slot cannot be acquired it writes a 503 and returns ok=false.
 func (h *Handler) acquireScheduledBackend(ctx context.Context, w http.ResponseWriter, r *http.Request, sched *Scheduler, route *Route, cacheKey string) (*Backend, *Route, bool, bool) {
 	backend := sched.Select(cacheKey)
 	if !h.applyWarmup(ctx, r) {
 		return nil, nil, false, false
 	}
 	if backend == nil {
 		return nil, route, false, true
 	}
 	// Decision Q22: a request that actually parks on the engine gate and wants
 	// an SSE stream gets its headers pre-written plus a 15 s keep-alive, so no
 	// intermediary times the connection out before the engine admits it.
 	var (
 		prewritten bool
 		hbStop     chan struct{}
 		hbDone     chan struct{}
 	)
 	onPark := func() {
 		if !requestWantsStream(r) {
 			return
 		}
 		flusher, ok := w.(http.Flusher)
 		if !ok {
 			return
 		}
 		prewritten = true
 		hbStop = make(chan struct{})
 		hbDone = make(chan struct{})
 		w.Header().Set("Content-Type", "text/event-stream")
 		w.Header().Set("Cache-Control", "no-cache")
 		w.Header().Set("Connection", "keep-alive")
 		w.Header().Set("X-Accel-Buffering", "no")
 		w.WriteHeader(http.StatusOK)
 		fmt.Fprint(w, ": keep-alive\n\n")
 		flusher.Flush()
 		go func() {
 			defer close(hbDone)
 			ticker := time.NewTicker(15 * time.Second)
 			defer ticker.Stop()
 			for {
 				select {
 				case <-hbStop:
 					return
 				case <-ctx.Done():
 					return
 				case <-ticker.C:
 					fmt.Fprint(w, ": keep-alive\n\n")
 					flusher.Flush()
 				}
 			}
 		}()
 	}
 	err := backend.acquire(ctx, onPark)
 	if prewritten {
 		close(hbStop)
 		<-hbDone
 	}
 	if err != nil {
 		// Once the SSE status line is spent, report the rejection as an event
 		// instead of a second WriteHeader.
 		reject := func(body string) {
 			if prewritten {
 				fmt.Fprintf(w, "event: error\ndata: {\"error\":%q}\n\n", body)
 				if f, ok := w.(http.Flusher); ok {
 					f.Flush()
 				}
 				return
 			}
 			w.WriteHeader(http.StatusServiceUnavailable)
 			fmt.Fprintf(w, "%s", body)
 		}
 		if errors.Is(err, ErrAdmissionTimeout) {
 			observability.Global().IncrAdmissionRejected("park_timeout")
 			logging.Warnf("admission timeout", map[string]string{
 				"backend": backend.Address,
 				"path":    r.URL.Path,
 				"model":   route.ModelName,
 			})
 			if !prewritten {
 				w.Header().Set("Retry-After", "5")
 			}
 			reject("admission timeout")
 		} else if errors.Is(err, ErrQueueFull) {
 			observability.Global().IncrQueueFull()
 			observability.Global().IncrAdmissionRejected("queue_full")
 			logging.Warnf("backend queue full", map[string]string{
 				"backend": backend.Address,
 				"path":    r.URL.Path,
 				"model":   route.ModelName,
 			})
 			if !prewritten {
 				w.Header().Set("Retry-After", "5")
 			}
 			reject("queue full")
 		} else {
 			logging.Warnf("backend acquire failed", map[string]string{
 				"backend": backend.Address,
 				"path":    r.URL.Path,
 				"model":   route.ModelName,
 				"err":     err.Error(),
 			})
 			reject("upstream busy")
 		}
 		return nil, nil, prewritten, false
 	}
 	if backend.Address != route.Upstream.Address {
 		patchedCfg := *route.Upstream
 		patchedCfg.Address = backend.Address
 		patchedURL := &url.URL{Scheme: "http", Host: backend.Address}
 		route = &Route{
 			Name:      route.Name,
 			ModelName: route.ModelName,
 			Upstream:  &patchedCfg,
 			Transport: h.getOrCreateTransport(backend.Address, &patchedCfg),
 			Director: func(req *http.Request) {
 				directorFunc(req, patchedURL, &patchedCfg)
 			},
 		}
 	}
 	return backend, route, prewritten, true
 }
 // requestWantsStream reports whether the JSON request body asks for an SSE
 // stream ("stream": true). The body is restored for the upstream.
 func requestWantsStream(r *http.Request) bool {
 	if r.Body == nil {
 		return false
 	}
 	body, err := io.ReadAll(r.Body)
 	if err != nil {
 		return false
 	}
 	r.Body = io.NopCloser(bytes.NewReader(body))
 	var probe struct {
 		Stream bool `json:"stream"`
 	}
 	if err := json.Unmarshal(body, &probe); err != nil {
 		return false
 	}
 	return probe.Stream
 }
 // handleAuthEndpoint routes /auth/* requests and returns true if handled.
 func (h *Handler) handleAuthEndpoint(w http.ResponseWriter, r *http.Request) bool {
 	switch r.URL.Path {
 	case "/auth/token":
 		h.handleAuthToken(w, r)
 		return true
 	case "/auth/refresh":
 		h.handleAuthRefresh(w, r)
 		return true
 	case "/auth/exchange":
 		h.handleAuthExchange(w, r)
 		return true
 	}
 	return false
 }
 // routeOrError resolves a route for r, writing error responses on failure.
 // Returns (route, true) on success or (nil, false) when a response has been written.
 func (h *Handler) routeOrError(w http.ResponseWriter, r *http.Request) (*Route, bool) {
 	route, err := h.RouteRequest(r)
 	// Check if this is a model validation error (from body-based dispatch)
 	if validationErr, ok := err.(*modelValidationError); ok {
-		// This is a client error, not a routing error
+		h.writeModelValidationError(w, validationErr, h.getValidModels())
 		var status int
 		var problemType string
 		var title string
 		var detail string
 		switch validationErr.Kind {
 		case "invalid_json":
 			status = http.StatusBadRequest
 			problemType = "https://api.example.com/problems/invalid-request-body"
 			title = "Invalid Request Body"
 			detail = validationErr.Message
 		case "missing_model", "empty_model", "null_model":
 			status = http.StatusBadRequest
 			problemType = "https://api.example.com/problems/missing-model"
 			title = "Missing Model"
 			detail = "The 'model' field is required and must be a non-empty string"
 		case "unknown_model":
 			status = http.StatusBadRequest
 			problemType = "https://api.example.com/problems/unknown-model"
 			title = "Unknown Model"
 			detail = fmt.Sprintf("Model %q is not available. See valid_models for available options.", validationErr.Model)
 		default:
 			status = http.StatusBadRequest
 			problemType = "https://api.example.com/problems/invalid-request"
 			title = "Invalid Request"
 			detail = validationErr.Message
 		}
 		// Get list of valid models (only for model-related errors)
 		var validModels []string
 		if validationErr.Kind == "unknown_model" || validationErr.Kind == "missing_model" || validationErr.Kind == "empty_model" || validationErr.Kind == "null_model" {
 			validModels = h.getValidModels()
 		}
 		writeProblemDetail(w, status, problemType, title, detail, validModels)
 		logging.Errorf("client error", validationErr, map[string]string{
 			"path":   r.URL.Path,
 			"method": r.Method,
 			"reason": validationErr.Kind,
 		})
-		return
+		return nil, false
 	}
 	if err != nil || route == nil {
 		// Route not found or error determining route
 		w.WriteHeader(http.StatusNotFound)
 		fmt.Fprintf(w, "not found")
 		if err != nil {
@@ -281,68 +648,221 @@ func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		} else {
 			logging.Errorf("no route matches", fmt.Errorf("path=%s method=%s", r.URL.Path, r.Method), nil)
 		}
-		return
+		return nil, false
 	}
 	return route, true
 }
 // writeModelValidationError writes a problem-detail response for model validation errors.
 func (h *Handler) writeModelValidationError(w http.ResponseWriter, validationErr *modelValidationError, validModels []string) {
 	var status int
 	var problemType, title, detail string
 	var models []string
 	switch validationErr.Kind {
 	case "invalid_json":
 		status = http.StatusBadRequest
 		problemType = "https://api.example.com/problems/invalid-request-body"
 		title = "Invalid Request Body"
 		detail = validationErr.Message
 	case "missing_model", "empty_model", "null_model":
 		status = http.StatusBadRequest
 		problemType = "https://api.example.com/problems/missing-model"
 		title = "Missing Model"
 		detail = "The 'model' field is required and must be a non-empty string"
 		models = validModels
 	case "unknown_model":
 		status = http.StatusBadRequest
 		problemType = "https://api.example.com/problems/unknown-model"
 		title = "Unknown Model"
 		detail = fmt.Sprintf("Model %q is not available. See valid_models for available options.", validationErr.Model)
 		models = validModels
 	default:
 		status = http.StatusBadRequest
 		problemType = "https://api.example.com/problems/invalid-request"
 		title = "Invalid Request"
 		detail = validationErr.Message
 	}
-	// Note: Body size checking already happened in RouteRequest (body was read for model dispatch).
+	writeProblemDetail(w, status, problemType, title, detail, models)
-	// For other paths, we still need to enforce the cap.
+}
-	// For /v1/chat/completions, the body was already read and validated.
+
-	
+// authenticateV1 validates JWT for /v1/* paths.
-	// Enforce request body size cap for non-chat routes
+// Returns false when auth fails (response already written).
-	if r.URL.Path != "/v1/chat/completions" {
+func (h *Handler) authenticateV1(w http.ResponseWriter, r *http.Request) bool {
-		if route.Upstream.MaxBodySize > 0 && r.ContentLength > route.Upstream.MaxBodySize {
+	if h.jwtValidator == nil {
-			w.WriteHeader(http.StatusRequestEntityTooLarge)
+		logging.Warnf("JWT auth disabled; /v1/* request unauthenticated", map[string]string{"path": r.URL.Path})
-			fmt.Fprintf(w, "request body too large")
+		return true
-			logging.Errorf("request rejected", fmt.Errorf("body_too_large"), map[string]string{
+	}
-				"reason":         "body_too_large",
+	if !strings.HasPrefix(r.URL.Path, "/v1/") {
-				"route":          route.Name,
+		return true
-				"upstream":       route.Upstream.Address,
+	}
-				"content_length": fmt.Sprintf("%d", r.ContentLength),
+	authHeader := r.Header.Get("Authorization")
-				"max_body_size":  fmt.Sprintf("%d", route.Upstream.MaxBodySize),
+	if authHeader == "" {
 		writeProblemDetail(w, http.StatusUnauthorized,
 			"https://api.example.com/problems/unauthorized",
 			"Unauthorized",
 			"Authorization header required",
 			nil)
 		logging.Errorf("auth failed", fmt.Errorf("missing auth header"), map[string]string{
 			"path": r.URL.Path,
 		})
 		return false
 	}
 	claims, err := h.jwtValidator.ValidateBearerToken(authHeader)
 	if err != nil {
 		writeProblemDetail(w, http.StatusForbidden,
 			"https://api.example.com/problems/forbidden",
 			"Forbidden",
 			"JWT validation failed",
 			nil)
 		logging.Errorf("auth failed", err, map[string]string{
 			"path": r.URL.Path,
 		})
 		return false
 	}
 	identity.Inject(r, claims)
 	if h.config.Auth.RequiredCapability != "" {
 		if !h.jwtValidator.CheckPermissions(claims, h.config.Auth.RequiredCapability, "*") {
 			writeProblemDetail(w, http.StatusForbidden,
 				"https://api.example.com/problems/insufficient-permissions",
 				"Insufficient Permissions",
 				fmt.Sprintf("Required capability: %s", h.config.Auth.RequiredCapability),
 				nil)
 			logging.Errorf("auth failed", fmt.Errorf("insufficient permissions"), map[string]string{
 				"path":     r.URL.Path,
 				"required": h.config.Auth.RequiredCapability,
 			})
-			return
+			return false
 		}
 	}
 	return true
 }
-		// Wrap request body with size limiter
+// enforceBodyLimit caps request body size for non-chat routes.
-		// This enforces the cap at read time, not after buffering
+// Returns false when the request is rejected (response already written).
-		if route.Upstream.MaxBodySize > 0 && r.Body != nil {
+func (h *Handler) enforceBodyLimit(w http.ResponseWriter, r *http.Request, route *Route) bool {
-			r.Body = io.NopCloser(io.LimitReader(r.Body, route.Upstream.MaxBodySize))
+	if r.URL.Path == "/v1/chat/completions" {
 		return true
 	}
 	if route.Upstream.MaxBodySize > 0 && r.ContentLength > route.Upstream.MaxBodySize {
 		w.WriteHeader(http.StatusRequestEntityTooLarge)
 		fmt.Fprintf(w, "request body too large")
 		logging.Errorf("request rejected", fmt.Errorf("body_too_large"), map[string]string{
 			"reason":         "body_too_large",
 			"route":          route.Name,
 			"upstream":       route.Upstream.Address,
 			"content_length": fmt.Sprintf("%d", r.ContentLength),
 			"max_body_size":  fmt.Sprintf("%d", route.Upstream.MaxBodySize),
 		})
 		return false
 	}
 	if route.Upstream.MaxBodySize > 0 && r.Body != nil {
 		r.Body = io.NopCloser(io.LimitReader(r.Body, route.Upstream.MaxBodySize))
 	}
 	return true
 }
 // setupCAGProxy acquires a scheduled backend (if any), builds a reverse proxy,
 // wires ErrorHandler and ModifyResponse, and returns (proxy, backend, true).
 // Returns (nil, nil, false) when the backend slot cannot be acquired (response written).
 func (h *Handler) setupCAGProxy(ctx context.Context, w http.ResponseWriter, r *http.Request, route *Route, sched *Scheduler, cacheKey string) (*httputil.ReverseProxy, *Backend, bool) {
 	var selectedBackend *Backend
 	var headersPrewritten bool
 	if sched != nil {
 		var ok bool
 		selectedBackend, route, headersPrewritten, ok = h.acquireScheduledBackend(ctx, w, r, sched, route, cacheKey)
 		if !ok {
 			return nil, nil, false
 		}
 	}
 	// Create the reverse proxy
 	proxy := httputil.NewSingleHostReverseProxy(&url.URL{
 		Scheme: "http",
 		Host:   route.Upstream.Address,
 	})
 	// Set the director to apply path rewriting
 	proxy.Director = route.Director
 	proxy.Transport = tracing.NewTransport(route.Transport)
-	// Use the connection-pooled transport
+	capturedBackend := selectedBackend
-	proxy.Transport = route.Transport
+	capturedRoute := route
-
+	if headersPrewritten {
-	// Set error handler to log upstream errors
+		// The 200 + text/event-stream status is already on the wire, so an
 		// upstream status can no longer be forwarded: httputil.ReverseProxy
 		// calls WriteHeader again and net/http keeps the first one. Frame a
 		// failure as an SSE event rather than letting a raw error body land
 		// inside the stream, which a streaming client reads as an empty
 		// completion and reports as success.
 		proxy.ModifyResponse = func(resp *http.Response) error {
 			if resp.StatusCode < http.StatusBadRequest {
 				return nil
 			}
 			body, _ := io.ReadAll(io.LimitReader(resp.Body, 4096))
 			resp.Body.Close()
 			logging.Warnf("upstream error after parked stream started", map[string]string{
 				"upstream": capturedRoute.Upstream.Address,
 				"status":   strconv.Itoa(resp.StatusCode),
 			})
 			resp.Body = io.NopCloser(strings.NewReader(fmt.Sprintf(
 				"event: error\ndata: {\"upstream_status\":%d,\"error\":%q}\n\n",
 				resp.StatusCode, strings.TrimSpace(string(body)))))
 			resp.ContentLength = -1
 			resp.Header.Del("Content-Length")
 			resp.Header.Set("Content-Type", "text/event-stream")
 			return nil
 		}
 	}
 	proxy.ErrorHandler = func(w http.ResponseWriter, r *http.Request, err error) {
 		if capturedBackend != nil {
 			if s := h.schedulers[capturedRoute.ModelName]; s != nil {
 				s.MarkFailed(capturedBackend.Address)
 			}
 		}
 		if headersPrewritten {
 			// SSE headers and a 200 are already on the wire: a 502 here would be
 			// an ignored WriteHeader and would tear the event stream. Report the
 			// failure as an event instead.
 			fmt.Fprint(w, "event: error\ndata: {\"error\":\"upstream error\"}\n\n")
 			if f, ok := w.(http.Flusher); ok {
 				f.Flush()
 			}
 			logging.Errorf("upstream error", err, map[string]string{
 				"upstream": capturedRoute.Upstream.Address,
 				"path":     r.URL.Path,
 			})
 			return
 		}
 		w.WriteHeader(http.StatusBadGateway)
 		fmt.Fprintf(w, "upstream error")
 		logging.Errorf("upstream error", err, map[string]string{
-			"upstream": route.Upstream.Address,
+			"upstream": capturedRoute.Upstream.Address,
 			"path":     r.URL.Path,
 		})
 	}
-	// Note: We apply connection timeout via Transport dialer, but NOT read timeout as a context deadline.
+	if cacheKey != "" && r.URL.Path == "/v1/chat/completions" {
-	// Read timeout should apply to inactivity (socket read timeout), not total request duration.
+		proxy.ModifyResponse = func(resp *http.Response) error {
-	// A streaming response that's continuously sending should not be cut off.
+			raw := resp.Header.Get("vllm-num-cached-tokens")
-	// The Transport's socket read timeout (via Dialer) handles inactivity timeouts.
+			if raw == "" {
 				return nil
 			}
 			n, err := strconv.ParseInt(raw, 10, 64)
 			if err != nil || n <= 0 {
 				return nil
 			}
 			observability.Global().IncrPrefixCacheHitTokens(n)
 			logging.Event(map[string]interface{}{
 				"event":         "llm_request",
 				"cache_key":     cacheKey,
 				"cached_tokens": n,
 			})
 			return nil
 		}
 	}
-	// Serve the request through the proxy
+	return proxy, selectedBackend, true
 	proxy.ServeHTTP(w, r)
 }
 // getValidModels returns a sorted list of all configured model names.
 func (h *Handler) getValidModels() []string {
 	var models []string
@@ -1,15 +1,24 @@
 package proxy
 import (
 	"crypto/rand"
 	"crypto/rsa"
 	"encoding/base64"
 	"encoding/json"
 	"fmt"
 	"io"
 	"math/big"
 	"net/http"
 	"net/http/httptest"
 	"runtime"
 	"strings"
 	"testing"
 	"time"
-	"github.com/Riotpiaole/homelab-frontend/internal/config"
+	"github.com/golang-jwt/jwt/v5"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/observability"
 )
 func TestProxyBasic(t *testing.T) {
@@ -414,3 +423,356 @@ func TestProxyPreservesBody(t *testing.T) {
 		t.Errorf("expected body %s, got %s", testBody, receivedBody)
 	}
 }
 // TestAuthenticateV1ProxyLevel exercises the three branches of authenticateV1:
 // no-token→401, bad-token→403, valid-token→proxied (non-401/403).
 func TestAuthenticateV1ProxyLevel(t *testing.T) {
 	// Generate RSA keypair for signing test JWTs.
 	privateKey, err := rsa.GenerateKey(rand.Reader, 2048)
 	if err != nil {
 		t.Fatalf("rsa.GenerateKey: %v", err)
 	}
 	// Build minimal JWKS document from the RSA public key.
 	nBytes := privateKey.PublicKey.N.Bytes()
 	eBig := new(big.Int).SetInt64(int64(privateKey.PublicKey.E))
 	eBytes := eBig.Bytes()
 	jwksDoc, _ := json.Marshal(map[string]interface{}{
 		"keys": []map[string]interface{}{
 			{
 				"kty": "RSA",
 				"use": "sig",
 				"kid": "test-key",
 				"alg": "RS256",
 				"n":   base64.RawURLEncoding.EncodeToString(nBytes),
 				"e":   base64.RawURLEncoding.EncodeToString(eBytes),
 			},
 		},
 	})
 	// Serve JWKS from a local httptest server.
 	jwksSrv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Type", "application/json")
 		w.Write(jwksDoc)
 	}))
 	defer jwksSrv.Close()
 	// Upstream stub — records whether it was reached.
 	reached := make(chan struct{}, 1)
 	upstreamSrv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		select {
 		case reached <- struct{}{}:
 		default:
 		}
 		w.WriteHeader(http.StatusOK)
 	}))
 	defer upstreamSrv.Close()
 	upstreamAddr := strings.TrimPrefix(upstreamSrv.URL, "http://")
 	// signJWT returns a valid RS256 JWT accepted by the Authentik-pattern issuer check.
 	signJWT := func() string {
 		tok := jwt.NewWithClaims(jwt.SigningMethodRS256, jwt.MapClaims{
 			"iss": "https://authentik.riotpiao.com/application/o/test/",
 			"aud": "test-audience",
 			"sub": "test-user",
 			"exp": time.Now().Add(time.Hour).Unix(),
 			"iat": time.Now().Unix(),
 		})
 		tok.Header["kid"] = "test-key"
 		signed, err := tok.SignedString(privateKey)
 		if err != nil {
 			t.Fatalf("sign JWT: %v", err)
 		}
 		return signed
 	}
 	// Build proxy with auth enabled.
 	cfg := &config.Config{
 		Routes: make(map[string]*config.Route),
 		Models: map[string]*config.ModelUpstream{
 			"auth-model": {
 				Name:    "auth-model",
 				Address: upstreamAddr,
 			},
 		},
 		Auth: config.AuthConfig{
 			Enabled: true,
 			JWKSURL: jwksSrv.URL,
 		},
 	}
 	h := New(cfg)
 	defer h.Close()
 	srv := httptest.NewServer(h)
 	defer srv.Close()
 	mkReq := func(authHeader string) *http.Request {
 		body := strings.NewReader(`{"model":"auth-model","messages":[]}`)
 		req, _ := http.NewRequest("POST", srv.URL+"/v1/chat/completions", body)
 		req.Header.Set("Content-Type", "application/json")
 		if authHeader != "" {
 			req.Header.Set("Authorization", authHeader)
 		}
 		return req
 	}
 	// Branch 1: no Authorization header → 401.
 	t.Run("no_token_returns_401", func(t *testing.T) {
 		resp, err := http.DefaultClient.Do(mkReq(""))
 		if err != nil {
 			t.Fatalf("request failed: %v", err)
 		}
 		defer resp.Body.Close()
 		if resp.StatusCode != http.StatusUnauthorized {
 			t.Errorf("expected 401, got %d", resp.StatusCode)
 		}
 	})
 	// Branch 2: malformed/invalid JWT → 403.
 	t.Run("bad_token_returns_403", func(t *testing.T) {
 		resp, err := http.DefaultClient.Do(mkReq("Bearer this.is.garbage"))
 		if err != nil {
 			t.Fatalf("request failed: %v", err)
 		}
 		defer resp.Body.Close()
 		if resp.StatusCode != http.StatusForbidden {
 			t.Errorf("expected 403, got %d", resp.StatusCode)
 		}
 	})
 	// Branch 3: valid RS256 JWT → proxied to upstream (not 401/403).
 	t.Run("valid_token_proxied", func(t *testing.T) {
 		resp, err := http.DefaultClient.Do(mkReq("Bearer " + signJWT()))
 		if err != nil {
 			t.Fatalf("request failed: %v", err)
 		}
 		defer resp.Body.Close()
 		if resp.StatusCode == http.StatusUnauthorized || resp.StatusCode == http.StatusForbidden {
 			body, _ := io.ReadAll(resp.Body)
 			t.Errorf("expected proxied response, got %d body=%s", resp.StatusCode, body)
 		}
 		select {
 		case <-reached:
 			// upstream was hit — auth passed
 		default:
 			t.Error("upstream was not reached after valid JWT")
 		}
 	})
 }
 // TestProxyQueueFull verifies that a 503 is returned and the queue_full metric
 // is incremented when the backend queue is at capacity.
 //
 // Setup: maxSlots=1, maxQueue=1. Request 1 holds the slot. Request 2 fills the
 // queue (blocks waiting for slot). Request 3 gets ErrQueueFull → 503.
 func TestProxyQueueFull(t *testing.T) {
 	t.Setenv("VLLM_MAX_NUM_SEQS", "1")    // 1 concurrent slot
 	t.Setenv("VLLM_MAX_QUEUE_DEPTH", "1") // queue capacity 1
 	t.Setenv("WARMUP_DELAY_MS", "0")
 	observability.Global().Reset()
 	// Upstream blocks until released; buffers one signal when it first starts.
 	slotHeld := make(chan struct{}, 1)
 	release := make(chan struct{})
 	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		select {
 		case slotHeld <- struct{}{}:
 		default:
 		}
 		<-release
 		w.WriteHeader(http.StatusOK)
 	}))
 	defer upstream.Close()
 	upstreamAddr := strings.TrimPrefix(upstream.URL, "http://")
 	cfg := &config.Config{
 		Routes: make(map[string]*config.Route),
 		Models: map[string]*config.ModelUpstream{
 			"q-model": {
 				Name:    "q-model",
 				Address: upstreamAddr,
 			},
 		},
 	}
 	h := New(cfg)
 	defer h.Close()
 	srv := httptest.NewServer(h)
 	defer srv.Close()
 	mkReq := func() *http.Request {
 		body := strings.NewReader(`{"model":"q-model","messages":[]}`)
 		req, _ := http.NewRequest("POST", srv.URL+"/v1/chat/completions", body)
 		req.Header.Set("Content-Type", "application/json")
 		return req
 	}
 	// Request 1: acquires the only slot, reaches upstream, blocks there.
 	r1ch := make(chan *http.Response, 1)
 	go func() {
 		resp, _ := http.DefaultClient.Do(mkReq())
 		r1ch <- resp
 	}()
 	<-slotHeld // slot is acquired; upstream is holding request 1
 	// Request 2: enters the queue (capacity 1), blocks waiting for slot.
 	r2ch := make(chan *http.Response, 1)
 	go func() {
 		resp, _ := http.DefaultClient.Do(mkReq())
 		r2ch <- resp
 	}()
 	// Spin until request 2 enters the backend queue channel.
 	for len(h.schedulers["q-model"].backends[0].queue) == 0 {
 		runtime.Gosched()
 	}
 	// Request 3: queue is full → expect 503 and metric increment.
 	resp3, err := http.DefaultClient.Do(mkReq())
 	if err != nil {
 		t.Fatalf("request 3 failed: %v", err)
 	}
 	defer resp3.Body.Close()
 	if resp3.StatusCode != http.StatusServiceUnavailable {
 		t.Errorf("expected 503 queue full, got %d", resp3.StatusCode)
 	}
 	if got := observability.Global().GetQueueFull(); got != 1 {
 		t.Errorf("expected GetQueueFull()=1, got %d", got)
 	}
 	// Cleanup: unblock upstream so goroutines can finish.
 	close(release)
 	if r := <-r1ch; r != nil {
 		r.Body.Close()
 	}
 	if r := <-r2ch; r != nil {
 		r.Body.Close()
 	}
 }
 // TestProxyCacheHitLogging verifies that when a response contains the
 // vllm-num-cached-tokens header and a cache key was set, the prefix cache
 // hit token count is incremented in observability metrics.
 func TestProxyCacheHitLogging(t *testing.T) {
 	observability.Global().Reset()
 	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("vllm-num-cached-tokens", "128")
 		w.WriteHeader(http.StatusOK)
 	}))
 	defer upstream.Close()
 	upstreamAddr := strings.TrimPrefix(upstream.URL, "http://")
 	cfg := &config.Config{
 		Routes: make(map[string]*config.Route),
 		Models: map[string]*config.ModelUpstream{
 			"cache-model": {
 				Name:    "cache-model",
 				Address: upstreamAddr,
 			},
 		},
 	}
 	h := New(cfg)
 	defer h.Close()
 	srv := httptest.NewServer(h)
 	defer srv.Close()
 	body := strings.NewReader(`{"model":"cache-model","messages":[]}`)
 	req, _ := http.NewRequest("POST", srv.URL+"/v1/chat/completions", body)
 	req.Header.Set("Content-Type", "application/json")
 	req.Header.Set("X-Poimen-Cache-Key", "testkey123")
 	resp, err := http.DefaultClient.Do(req)
 	if err != nil {
 		t.Fatalf("request failed: %v", err)
 	}
 	resp.Body.Close()
 	if got := observability.Global().GetPrefixCacheHitTokens(); got != 128 {
 		t.Errorf("expected PrefixCacheHitTokens=128, got %d", got)
 	}
 }
 // TestWarmupHeaderHandling verifies that X-Poimen-Warmup: true is stripped from
 // the upstream request and replaced with X-Priority: low, while a request without
 // X-Poimen-Warmup reaches upstream without either header.
 //
 // The warmup path runs only for model-based routes (cfg.Models + scheduler),
 // so we POST to /v1/chat/completions with a JSON body that names the test model.
 // WARMUP_DELAY_MS=0 eliminates the 500 ms sleep.
 func TestWarmupHeaderHandling(t *testing.T) {
 	t.Setenv("WARMUP_DELAY_MS", "0")
 	tests := []struct {
 		name            string
 		sendWarmup      bool
 		wantWarmupGone  bool
 		wantPriorityLow bool
 	}{
 		{
 			name:            "warmup=true",
 			sendWarmup:      true,
 			wantWarmupGone:  true, // X-Poimen-Warmup must NOT reach upstream
 			wantPriorityLow: true, // X-Priority: low must be set
 		},
 		{
 			name:            "warmup=false",
 			sendWarmup:      false,
 			wantWarmupGone:  true,  // no header sent, so absent at upstream
 			wantPriorityLow: false, // X-Priority must NOT be set
 		},
 	}
 	for _, tc := range tests {
 		t.Run(tc.name, func(t *testing.T) {
 			var gotWarmup, gotPriority string
 			upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 				gotWarmup = r.Header.Get("X-Poimen-Warmup")
 				gotPriority = r.Header.Get("X-Priority")
 				w.WriteHeader(http.StatusOK)
 			}))
 			defer upstream.Close()
 			upstreamAddr := strings.TrimPrefix(upstream.URL, "http://")
 			// Warmup code only runs for model-based routes (scheduler path).
 			// Use cfg.Models so New() builds a Scheduler for "warmup-model".
 			cfg := &config.Config{
 				Routes: make(map[string]*config.Route),
 				Models: map[string]*config.ModelUpstream{
 					"warmup-model": {
 						Name:    "warmup-model",
 						Address: upstreamAddr,
 					},
 				},
 			}
 			h := New(cfg)
 			defer h.Close()
 			srv := httptest.NewServer(h)
 			defer srv.Close()
 			// POST to /v1/chat/completions — triggers model-based dispatch and warmup path.
 			body := strings.NewReader(`{"model":"warmup-model","messages":[]}`)
 			req, _ := http.NewRequest("POST", srv.URL+"/v1/chat/completions", body)
 			req.Header.Set("Content-Type", "application/json")
 			if tc.sendWarmup {
 				req.Header.Set("X-Poimen-Warmup", "true")
 			}
 			resp, err := http.DefaultClient.Do(req)
 			if err != nil {
 				t.Fatalf("request failed: %v", err)
 			}
 			resp.Body.Close()
 			if tc.wantWarmupGone && gotWarmup != "" {
 				t.Errorf("X-Poimen-Warmup must be stripped before upstream, got %q", gotWarmup)
 			}
 			if tc.wantPriorityLow && gotPriority != "low" {
 				t.Errorf("X-Priority: low must be set when warmup=true, got %q", gotPriority)
 			}
 			if !tc.wantPriorityLow && gotPriority != "" {
 				t.Errorf("X-Priority must not be set for normal requests, got %q", gotPriority)
 			}
 		})
 	}
 }
@@ -9,7 +9,7 @@ import (
 	"net/http"
 	"net/url"
-	"github.com/Riotpiaole/homelab-frontend/internal/config"
+	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
 )
 // RouteRequest determines which upstream should handle the request.
@@ -69,9 +69,10 @@ func (h *Handler) routeByModel(r *http.Request, path string) (*Route, error) {
 	// Restore the body so it can be read again by the upstream
 	r.Body = io.NopCloser(bytes.NewReader(bodyBytes))
-	// Parse the JSON to find the model field
+	// Extract only the top-level "model" value with a token walk: the common
-	var payload map[string]interface{}
+	// path must not materialise the whole body (messages and all) as a map.
-	if err := json.Unmarshal(bodyBytes, &payload); err != nil {
+	modelRaw, hasModel, err := extractTopLevelModel(bodyBytes)
 	if err != nil {
 		return nil, &modelValidationError{
 			Kind:    "invalid_json",
 			Message: "request body is not valid JSON",
@@ -79,7 +80,6 @@ func (h *Handler) routeByModel(r *http.Request, path string) (*Route, error) {
 	}
 	// Extract the model name
 	modelVal, hasModel := payload["model"]
 	if !hasModel {
 		return nil, &modelValidationError{
 			Kind:    "missing_model",
@@ -88,7 +88,7 @@ func (h *Handler) routeByModel(r *http.Request, path string) (*Route, error) {
 	}
 	// Handle null model
-	if modelVal == nil {
+	if bytes.Equal(bytes.TrimSpace(modelRaw), []byte("null")) {
 		return nil, &modelValidationError{
 			Kind:    "null_model",
 			Message: "'model' field is null",
@@ -96,8 +96,8 @@ func (h *Handler) routeByModel(r *http.Request, path string) (*Route, error) {
 	}
 	// Extract as string
-	modelName, ok := modelVal.(string)
+	var modelName string
-	if !ok {
+	if err := json.Unmarshal(modelRaw, &modelName); err != nil {
 		return nil, &modelValidationError{
 			Kind:    "missing_model",
 			Message: "'model' field must be a string",
@@ -122,6 +122,36 @@ func (h *Handler) routeByModel(r *http.Request, path string) (*Route, error) {
 		}
 	}
 	// If upstream expects a different model name, rewrite the body. This path is
 	// uncommon, so it may decode the body as raw fields; the common path above
 	// does not build a full map.
 	if modelUpstream.UpstreamModel != "" && modelUpstream.UpstreamModel != modelName {
 		var fields map[string]json.RawMessage
 		if err := json.Unmarshal(bodyBytes, &fields); err != nil {
 			return nil, &modelValidationError{
 				Kind:    "invalid_request",
 				Message: fmt.Sprintf("failed to rewrite model name: %v", err),
 			}
 		}
 		newModel, err := json.Marshal(modelUpstream.UpstreamModel)
 		if err != nil {
 			return nil, &modelValidationError{
 				Kind:    "invalid_request",
 				Message: fmt.Sprintf("failed to rewrite model name: %v", err),
 			}
 		}
 		fields["model"] = newModel
 		newBody, err := json.Marshal(fields)
 		if err != nil {
 			return nil, &modelValidationError{
 				Kind:    "invalid_request",
 				Message: fmt.Sprintf("failed to rewrite model name: %v", err),
 			}
 		}
 		r.Body = io.NopCloser(bytes.NewReader(newBody))
 		r.ContentLength = int64(len(newBody))
 	}
 	// Determine the upstream path based on the request path
 	upstreamPath := path
 	if path == "/v1/rerank" {
@@ -137,14 +167,15 @@ func (h *Handler) routeByModel(r *http.Request, path string) (*Route, error) {
 		ConnectTimeout: h.defaultConnectTimeout,
 		ReadTimeout:    h.defaultReadTimeout,
 		WriteTimeout:   h.defaultWriteTimeout,
-		MaxBodySize:    h.defaultMaxBodySize,
+		MaxBodySize:    h.maxBodyBytes,
 		AuthRequired:   false,
 	}
-	targetURL, _ := url.Parse("http://" + modelUpstream.Address)
+	targetURL := &url.URL{Scheme: "http", Host: modelUpstream.Address}
 	route := &Route{
 		Name:      "v1-chat-" + modelName,
 		ModelName: modelName,
 		Upstream:  upstreamCfg,
 		Transport: h.getOrCreateTransport(modelUpstream.Address, upstreamCfg),
 		Director: func(req *http.Request) {
@@ -154,3 +185,87 @@ func (h *Handler) routeByModel(r *http.Request, path string) (*Route, error) {
 	return route, nil
 }
 // extractTopLevelModel walks a JSON object body with a streaming decoder and
 // returns the raw value of the top-level "model" field. It never builds the
 // full document as a map, so a large "messages" array is skipped by token.
 // hasModel is false when the key is absent or the document is a bare null.
 func extractTopLevelModel(body []byte) (model json.RawMessage, hasModel bool, err error) {
 	dec := json.NewDecoder(bytes.NewReader(body))
 	tok, err := dec.Token()
 	if err != nil {
 		return nil, false, err
 	}
 	if tok == nil {
 		// A bare `null` body decoded to a nil map before, i.e. no model field.
 		if _, err := dec.Token(); err != io.EOF {
 			if err == nil {
 				return nil, false, fmt.Errorf("unexpected data after JSON null")
 			}
 			return nil, false, err
 		}
 		return nil, false, nil
 	}
 	if delim, ok := tok.(json.Delim); !ok || delim != '{' {
 		return nil, false, fmt.Errorf("request body is not a JSON object")
 	}
 	for dec.More() {
 		keyTok, err := dec.Token()
 		if err != nil {
 			return nil, false, err
 		}
 		key, _ := keyTok.(string)
 		if key == "model" {
 			if err := dec.Decode(&model); err != nil {
 				return nil, false, err
 			}
 			hasModel = true
 			continue
 		}
 		if err := skipJSONValue(dec); err != nil {
 			return nil, false, err
 		}
 	}
 	// Consume the closing brace and reject trailing data, preserving the
 	// invalid_json answer the old whole-body decode produced.
 	if _, err := dec.Token(); err != nil {
 		return nil, false, err
 	}
 	if _, err := dec.Token(); err != io.EOF {
 		if err == nil {
 			return nil, false, fmt.Errorf("unexpected data after JSON object")
 		}
 		return nil, false, err
 	}
 	return model, hasModel, nil
 }
 // skipJSONValue advances dec past the next JSON value without materialising it.
 func skipJSONValue(dec *json.Decoder) error {
 	tok, err := dec.Token()
 	if err != nil {
 		return err
 	}
 	delim, ok := tok.(json.Delim)
 	if !ok {
 		return nil // scalar
 	}
 	if delim != '{' && delim != '[' {
 		return fmt.Errorf("unexpected delimiter %v", delim)
 	}
 	depth := 1
 	for depth > 0 {
 		tok, err := dec.Token()
 		if err != nil {
 			return err
 		}
 		if d, ok := tok.(json.Delim); ok {
 			if d == '{' || d == '[' {
 				depth++
 			} else {
 				depth--
 			}
 		}
 	}
 	return nil
 }
@@ -0,0 +1,224 @@
 package proxy
 import (
 	"context"
 	"errors"
 	"hash/fnv"
 	"sort"
 	"sync"
 	"sync/atomic"
 	"time"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/observability"
 )
 // ErrQueueFull is returned when the in-memory queue is at capacity.
 var ErrQueueFull = errors.New("backend queue full")
 // ErrAdmissionTimeout is returned when a request parked on engine admission
 // exceeds the configured maximum park duration.
 var ErrAdmissionTimeout = errors.New("admission timeout")
 // AdmissionLimits are the engine-wide admission thresholds applied to every
 // backend of a scheduler (#64).
 type AdmissionLimits struct {
 	MaxInFlight int
 	MaxKVUsage  float64
 	MaxPark     time.Duration
 }
 // Backend represents a single vLLM upstream with a bounded in-memory queue.
 // Two channels model the queue:
 //
 //	queue  — waiting requests (bounded by VLLM_MAX_QUEUE_DEPTH)
 //	slots  — concurrent in-service requests (bounded by VLLM_MAX_NUM_SEQS)
 //
 // The engine gate is applied before the queue: admission reads the engine's
 // own published gauges via observer, which is global across replicas.
 type Backend struct {
 	Address     string
 	queue       chan struct{}
 	slots       chan struct{}
 	observer    *EngineObserver
 	maxInFlight int
 	maxKVUsage  float64
 	maxPark     time.Duration
 }
 // newBackend creates a Backend with given queue depth and concurrency limit.
 func newBackend(addr string, maxSlots, maxQueue int) *Backend {
 	slots := make(chan struct{}, maxSlots)
 	for i := 0; i < maxSlots; i++ {
 		slots <- struct{}{}
 	}
 	return &Backend{
 		Address: addr,
 		queue:   make(chan struct{}, maxQueue),
 		slots:   slots,
 	}
 }
 // Acquire enters the in-memory queue then waits for a vLLM concurrency slot.
 // Returns ErrQueueFull immediately if the queue channel is at capacity (no goroutine queued).
 // Returns ctx.Err() if the context is cancelled while waiting for a slot.
 // Returns ErrAdmissionTimeout if the engine gate parks the request past maxPark.
 func (b *Backend) Acquire(ctx context.Context) error {
 	return b.acquire(ctx, nil)
 }
 // acquire is Acquire with an optional onPark callback. onPark is invoked once,
 // on the calling goroutine, the first time the request has to wait for engine
 // admission; the parked streaming path uses it to start an SSE heartbeat.
 func (b *Backend) acquire(ctx context.Context, onPark func()) error {
 	// Engine gate (#64): admit on the engine's own gauges, not on this pod's
 	// counters. Failing OPEN on !Healthy is deliberate — a metrics outage must
 	// not become an inference outage; the three-replica gate is only a fairness
 	// improvement on top of the engine's own queueing.
 	if b.observer != nil {
 		deadline := time.Now().Add(b.maxPark)
 		timer := time.NewTimer(time.Until(deadline))
 		defer timer.Stop()
 		parked := false
 		for {
 			// State and tick channel are read together under one lock: taking
 			// them separately can miss a poll that lands between the two calls.
 			st, tick := b.observer.Snapshot()
 			if !st.Healthy || (st.InFlight() < int64(b.maxInFlight) && st.KVUsage < b.maxKVUsage) {
 				break
 			}
 			if !parked {
 				observability.Global().IncrAdmissionParked()
 				parked = true
 				if onPark != nil {
 					onPark()
 				}
 			}
 			select {
 			case <-tick:
 			case <-ctx.Done():
 				return ctx.Err()
 			case <-timer.C:
 				return ErrAdmissionTimeout
 			}
 		}
 	}
 	// Non-blocking queue entry: reject immediately when queue is full.
 	select {
 	case b.queue <- struct{}{}:
 		// entered queue
 	default:
 		return ErrQueueFull
 	}
 	// Wait for a concurrency slot, then leave the queue.
 	select {
 	case <-b.slots:
 		<-b.queue // leave queue; now in service
 		return nil
 	case <-ctx.Done():
 		<-b.queue // leave queue; cancelled
 		return ctx.Err()
 	}
 }
 // Release returns a concurrency slot to the pool after the upstream request completes.
 func (b *Backend) Release() {
 	b.slots <- struct{}{}
 }
 // Scheduler routes LLM requests to backends using rendezvous hashing (cache-aware)
 // or round-robin (no cache key). Failed backends are excluded for a configurable window.
 type Scheduler struct {
 	mu          sync.RWMutex
 	backends    []*Backend
 	failedUntil map[string]time.Time
 	failWindow  time.Duration
 	rrIdx       atomic.Uint64
 }
 // NewScheduler creates a Scheduler for the given addresses.
 // maxSlots = VLLM_MAX_NUM_SEQS, maxQueue = VLLM_MAX_QUEUE_DEPTH.
 // observers holds one engine observer per backend address (may be nil).
 func NewScheduler(addresses []string, maxSlots, maxQueue int, observers map[string]*EngineObserver, limits AdmissionLimits) *Scheduler {
 	backends := make([]*Backend, len(addresses))
 	for i, addr := range addresses {
 		backends[i] = newBackend(addr, maxSlots, maxQueue)
 		backends[i].observer = observers[addr]
 		backends[i].maxInFlight = limits.MaxInFlight
 		backends[i].maxKVUsage = limits.MaxKVUsage
 		backends[i].maxPark = limits.MaxPark
 	}
 	return &Scheduler{
 		backends:    backends,
 		failedUntil: make(map[string]time.Time),
 		failWindow:  30 * time.Second,
 	}
 }
 // Select returns a backend. Uses rendezvous hashing when cacheKey is non-empty
 // (same key always routes to the same backend, skipping unhealthy ones).
 // Uses round-robin when cacheKey is empty.
 func (s *Scheduler) Select(cacheKey string) *Backend {
 	s.mu.RLock()
 	defer s.mu.RUnlock()
 	if len(s.backends) == 0 {
 		return nil
 	}
 	if len(s.backends) == 1 {
 		return s.backends[0]
 	}
 	if cacheKey != "" {
 		return s.selectRendezvous(cacheKey)
 	}
 	return s.selectRoundRobin()
 }
 // selectRendezvous picks the healthy backend with the highest FNV32a score
 // for the key (highest random weight / rendezvous hashing).
 // Falls back to next-highest score when primary is excluded by MarkFailed.
 // Must be called with mu held.
 func (s *Scheduler) selectRendezvous(cacheKey string) *Backend {
 	type scored struct {
 		b     *Backend
 		score uint32
 	}
 	now := time.Now()
 	scores := make([]scored, len(s.backends))
 	h := fnv.New32a()
 	for i, b := range s.backends {
 		h.Reset()
 		h.Write([]byte(cacheKey + ":" + b.Address))
 		scores[i] = scored{b: b, score: h.Sum32()}
 	}
 	sort.Slice(scores, func(i, j int) bool {
 		return scores[i].score > scores[j].score
 	})
 	for _, sc := range scores {
 		_, failed := s.failedUntil[sc.b.Address]
 		if !failed {
 			return sc.b
 		}
 		expiry := s.failedUntil[sc.b.Address]
 		if now.After(expiry) {
 			return sc.b
 		}
 	}
 	// All backends unhealthy: return highest-scored (fail-open).
 	return scores[0].b
 }
 // selectRoundRobin distributes requests evenly when no cache key is present.
 // Must be called with mu held.
 func (s *Scheduler) selectRoundRobin() *Backend {
 	idx := s.rrIdx.Add(1) - 1
 	return s.backends[idx%uint64(len(s.backends))]
 }
 // MarkFailed excludes addr from routing for the fail window (default 30 s).
 // Called by the proxy ErrorHandler on upstream connection failure.
 func (s *Scheduler) MarkFailed(addr string) {
 	s.mu.Lock()
 	defer s.mu.Unlock()
 	s.failedUntil[addr] = time.Now().Add(s.failWindow)
 }
@@ -0,0 +1,182 @@
 package proxy
 import (
 	"context"
 	"errors"
 	"runtime"
 	"sync"
 	"testing"
 	"time"
 )
 // TestBackendAcquireBlocksThenUnblocksOnRelease verifies that a second Acquire
 // blocks while a slot is held, then unblocks when Release is called.
 func TestBackendAcquireBlocksThenUnblocksOnRelease(t *testing.T) {
 	b := newBackend("host:1", 1, 1)
 	// G1: acquire and hold the only slot.
 	if err := b.Acquire(context.Background()); err != nil {
 		t.Fatalf("G1 Acquire: unexpected error: %v", err)
 	}
 	g2Done := make(chan error, 1)
 	go func() {
 		g2Done <- b.Acquire(context.Background())
 	}()
 	// Wait until G2 enters the queue channel (proves Acquire is blocking on slots).
 	for len(b.queue) == 0 {
 		runtime.Gosched()
 	}
 	select {
 	case err := <-g2Done:
 		t.Fatalf("G2 returned before Release: %v", err)
 	default:
 	}
 	// G1 releases; G2 should unblock.
 	b.Release()
 	select {
 	case err := <-g2Done:
 		if err != nil {
 			t.Fatalf("G2 Acquire after Release: unexpected error: %v", err)
 		}
 	case <-time.After(time.Second):
 		t.Fatal("G2 did not unblock within 1s after Release")
 	}
 	// Cleanup: release G2's slot.
 	b.Release()
 }
 // TestBackendAcquireReturnsErrQueueFullWhenQueueFull verifies that Acquire returns
 // ErrQueueFull immediately when no queue capacity exists (maxQueue=0).
 // With a zero-capacity queue channel the non-blocking select always hits default.
 func TestBackendAcquireReturnsErrQueueFullWhenQueueFull(t *testing.T) {
 	b := newBackend("host:1", 1, 0)
 	err := b.Acquire(context.Background())
 	if !errors.Is(err, ErrQueueFull) {
 		t.Fatalf("expected ErrQueueFull, got %v", err)
 	}
 }
 // TestSchedulerSelectRendezvousHashDeterministic verifies that the same cache key
 // always selects the same backend (rendezvous / highest-random-weight hashing).
 func TestSchedulerSelectRendezvousHashDeterministic(t *testing.T) {
 	addrs := []string{"a:80", "b:80", "c:80"}
 	s := NewScheduler(addrs, 10, 10, nil, AdmissionLimits{})
 	first := s.Select("same-cache-key")
 	if first == nil {
 		t.Fatal("Select returned nil")
 	}
 	for i := 1; i < 10; i++ {
 		b := s.Select("same-cache-key")
 		if b == nil || b.Address != first.Address {
 			t.Fatalf("call %d: want %s, got %v", i, first.Address, b)
 		}
 	}
 }
 // TestSchedulerSelectNoKeyRoundRobin verifies that round-robin distributes
 // requests evenly across all backends when no cache key is given.
 func TestSchedulerSelectNoKeyRoundRobin(t *testing.T) {
 	addrs := []string{"a:80", "b:80", "c:80"}
 	s := NewScheduler(addrs, 10, 10, nil, AdmissionLimits{})
 	counts := make(map[string]int)
 	for i := 0; i < 9; i++ {
 		b := s.Select("")
 		if b == nil {
 			t.Fatalf("call %d: Select returned nil", i)
 		}
 		counts[b.Address]++
 	}
 	for _, addr := range addrs {
 		if counts[addr] != 3 {
 			t.Errorf("addr %s: want 3 selections, got %d (all counts: %v)", addr, counts[addr], counts)
 		}
 	}
 }
 // TestBackendAcquireCancelledContext verifies that Acquire returns ctx.Err() when the
 // context is cancelled while the caller is blocked waiting for a concurrency slot,
 // and that the queue depth returns to 0 after cancellation.
 func TestBackendAcquireCancelledContext(t *testing.T) {
 	b := newBackend("host:1", 1, 1)
 	// G1: acquire and hold the only slot indefinitely.
 	if err := b.Acquire(context.Background()); err != nil {
 		t.Fatalf("G1 Acquire: unexpected error: %v", err)
 	}
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 	g2Done := make(chan error, 1)
 	go func() {
 		g2Done <- b.Acquire(ctx)
 	}()
 	// Wait until G2 enters the queue channel.
 	for len(b.queue) == 0 {
 		runtime.Gosched()
 	}
 	// Verify G2 is queued (queue channel has one item).
 	if qd := len(b.queue); qd != 1 {
 		t.Errorf("expected queue depth 1 while G2 blocked, got %d", qd)
 	}
 	// Cancel ctx while G2 is waiting for the slot.
 	cancel()
 	select {
 	case err := <-g2Done:
 		if err == nil {
 			t.Fatal("G2 Acquire: expected ctx.Err(), got nil")
 		}
 		if !errors.Is(err, context.Canceled) {
 			t.Fatalf("G2 Acquire: expected context.Canceled, got %v", err)
 		}
 	case <-time.After(time.Second):
 		t.Fatal("G2 did not return within 1s after context cancel")
 	}
 	// Queue depth must return to 0 after G2 is drained.
 	if qd := len(b.queue); qd != 0 {
 		t.Errorf("expected queue depth 0 after cancellation, got %d", qd)
 	}
 	// Cleanup: release G1's slot.
 	b.Release()
 }
 // TestSchedulerMarkFailedExcludesBackend verifies that a failed backend is not
 // selected within the fail window (30 s default).
 func TestSchedulerMarkFailedExcludesBackend(t *testing.T) {
 	addrs := []string{"a:80", "b:80"}
 	s := NewScheduler(addrs, 10, 10, nil, AdmissionLimits{})
 	s.MarkFailed("a:80")
 	var mu sync.Mutex
 	seen := make(map[string]int)
 	for i := 0; i < 10; i++ {
 		b := s.Select("any-key")
 		if b == nil {
 			t.Fatalf("call %d: Select returned nil", i)
 		}
 		mu.Lock()
 		seen[b.Address]++
 		mu.Unlock()
 	}
 	if seen["a:80"] > 0 {
 		t.Errorf("failed backend a:80 was selected %d times; expected 0 within fail window", seen["a:80"])
 	}
 }
@@ -6,11 +6,13 @@ import (
 	"io"
 	"net/http"
 	"net/http/httptest"
 	"runtime"
 	"strings"
 	"sync"
 	"testing"
 	"time"
-	"github.com/Riotpiaole/homelab-frontend/internal/config"
+	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
 )
 // TestSSEUnbuffered verifies that SSE events stream to the client without buffering.
@@ -473,3 +475,337 @@ func TestNoFullBuffering(t *testing.T) {
 		t.Errorf("expected to read %d bytes, got %d", len(largeData), totalRead)
 	}
 }
 // TestTCPBackpressure verifies that TCP backpressure is respected during streaming.
 // When a client reads slowly, the upstream should experience backpressure on writes.
 func TestTCPBackpressure(t *testing.T) {
 	// Track when upstream started writing and when each write completed
 	var writeTimes []time.Time
 	writesMu := sync.Mutex{}
 	upstreamServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Type", "text/event-stream")
 		w.Header().Set("X-Accel-Buffering", "no") // Issue #33: disable buffering
 		w.WriteHeader(http.StatusOK)
 		rc := http.NewResponseController(w)
 		// Send many events to trigger backpressure
 		for i := 0; i < 20; i++ {
 			writesMu.Lock()
 			writeTimes = append(writeTimes, time.Now())
 			writesMu.Unlock()
 			fmt.Fprintf(w, "data: event%d\n\n", i)
 			if err := rc.Flush(); err != nil {
 				return
 			}
 		}
 	}))
 	defer upstreamServer.Close()
 	upstreamAddr := strings.TrimPrefix(upstreamServer.URL, "http://")
 	cfg := &config.Config{
 		Routes: map[string]*config.Route{
 			"backpressure-route": {
 				Name: "backpressure-route",
 				Upstream: config.Upstream{
 					Address:        upstreamAddr,
 					ConnectTimeout: 5 * time.Second,
 					ReadTimeout:    10 * time.Second,
 					WriteTimeout:   5 * time.Second,
 					MaxBodySize:    1024 * 1024,
 					AuthRequired:   false,
 				},
 			},
 		},
 	}
 	handler := New(cfg)
 	defer handler.Close()
 	server := httptest.NewServer(handler)
 	defer server.Close()
 	resp, err := http.Get(server.URL + "/backpressure")
 	if err != nil {
 		t.Fatalf("request failed: %v", err)
 	}
 	defer resp.Body.Close()
 	// Verify X-Accel-Buffering header is passed through
 	if resp.Header.Get("X-Accel-Buffering") != "no" {
 		t.Errorf("X-Accel-Buffering header not propagated, got: %s", resp.Header.Get("X-Accel-Buffering"))
 	}
 	// Read events with simulated slow client (small buffer)
 	reader := bufio.NewReader(resp.Body)
 	readStart := time.Now()
 	eventCount := 0
 	for {
 		line, err := reader.ReadString('\n')
 		if err != nil {
 			if err == io.EOF {
 				break
 			}
 			t.Fatalf("read failed: %v", err)
 		}
 		if strings.HasPrefix(strings.TrimSpace(line), "data:") {
 			eventCount++
 			// Simulate slow client by adding delay
 			time.Sleep(5 * time.Millisecond)
 		}
 	}
 	// Verify we got all events
 	if eventCount != 20 {
 		t.Errorf("expected 20 events, got %d", eventCount)
 	}
 	// Total read time should be roughly eventCount * readDelay
 	// indicating backpressure was applied (upstream couldn't send all at once)
 	elapsed := time.Since(readStart)
 	expectedMin := time.Duration(20*5) * time.Millisecond
 	if elapsed < expectedMin {
 		t.Logf("backpressure test: elapsed=%.0fms (expected ~%.0fms)", elapsed.Seconds()*1000, expectedMin.Seconds()*1000)
 	}
 }
 // TestConcurrentSSEStreams verifies that HTTP/2 multiplexing handles multiple concurrent streams.
 // Issue #32: Multiple LLM requests should not block each other.
 func TestConcurrentSSEStreams(t *testing.T) {
 	upstreamServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Type", "text/event-stream")
 		w.Header().Set("X-Accel-Buffering", "no")
 		w.WriteHeader(http.StatusOK)
 		rc := http.NewResponseController(w)
 		// Each request sends unique identifier
 		reqID := r.URL.Query().Get("id")
 		for i := 0; i < 5; i++ {
 			fmt.Fprintf(w, "data: [%s] event %d\n\n", reqID, i)
 			if err := rc.Flush(); err != nil {
 				return
 			}
 			time.Sleep(10 * time.Millisecond)
 		}
 	}))
 	defer upstreamServer.Close()
 	upstreamAddr := strings.TrimPrefix(upstreamServer.URL, "http://")
 	cfg := &config.Config{
 		Routes: map[string]*config.Route{
 			"concurrent-route": {
 				Name: "concurrent-route",
 				Upstream: config.Upstream{
 					Address:        upstreamAddr,
 					ConnectTimeout: 5 * time.Second,
 					ReadTimeout:    10 * time.Second,
 					WriteTimeout:   5 * time.Second,
 					MaxBodySize:    1024 * 1024,
 					AuthRequired:   false,
 				},
 			},
 		},
 	}
 	handler := New(cfg)
 	defer handler.Close()
 	server := httptest.NewServer(handler)
 	defer server.Close()
 	// Launch multiple concurrent requests
 	var wg sync.WaitGroup
 	results := make(map[string][]string)
 	resultsMu := sync.Mutex{}
 	for id := 0; id < 3; id++ {
 		wg.Add(1)
 		go func(streamID int) {
 			defer wg.Done()
 			url := fmt.Sprintf("%s/concurrent?id=stream%d", server.URL, streamID)
 			resp, err := http.Get(url)
 			if err != nil {
 				t.Errorf("request failed: %v", err)
 				return
 			}
 			defer resp.Body.Close()
 			reader := bufio.NewReader(resp.Body)
 			var events []string
 			for {
 				line, err := reader.ReadString('\n')
 				if err != nil {
 					if err == io.EOF {
 						break
 					}
 					t.Errorf("read failed: %v", err)
 					return
 				}
 				line = strings.TrimSpace(line)
 				if strings.HasPrefix(line, "data:") {
 					events = append(events, line)
 				}
 			}
 			resultsMu.Lock()
 			results[fmt.Sprintf("stream%d", streamID)] = events
 			resultsMu.Unlock()
 		}(id)
 	}
 	wg.Wait()
 	// Verify all streams got their events
 	for i := 0; i < 3; i++ {
 		key := fmt.Sprintf("stream%d", i)
 		events, ok := results[key]
 		if !ok {
 			t.Errorf("stream%d: no results", i)
 			continue
 		}
 		if len(events) != 5 {
 			t.Errorf("stream%d: expected 5 events, got %d", i, len(events))
 		}
 		// Verify all events belong to this stream
 		for _, event := range events {
 			if !strings.Contains(event, key) {
 				t.Errorf("stream%d: event from wrong stream: %s", i, event)
 			}
 		}
 	}
 }
 // TestClientDisconnectCancelsUpstream verifies that when a client closes mid-stream,
 // the upstream request context is cancelled immediately and no goroutines are leaked.
 func TestClientDisconnectCancelsUpstream(t *testing.T) {
 	contextCancelledAt := time.Time{}
 	contextCancelledMu := sync.Mutex{}
 	upstreamRequestedAt := time.Time{}
 	upstreamServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		upstreamRequestedAt = time.Now()
 		w.Header().Set("Content-Type", "text/event-stream")
 		w.WriteHeader(http.StatusOK)
 		rc := http.NewResponseController(w)
 		// Send events until context is cancelled
 		for i := 0; i < 100; i++ {
 			select {
 			case <-r.Context().Done():
 				contextCancelledMu.Lock()
 				contextCancelledAt = time.Now()
 				contextCancelledMu.Unlock()
 				return
 			default:
 			}
 			fmt.Fprintf(w, "data: event%d\n\n", i)
 			if err := rc.Flush(); err != nil {
 				contextCancelledMu.Lock()
 				contextCancelledAt = time.Now()
 				contextCancelledMu.Unlock()
 				return
 			}
 			time.Sleep(50 * time.Millisecond)
 		}
 	}))
 	defer upstreamServer.Close()
 	upstreamAddr := strings.TrimPrefix(upstreamServer.URL, "http://")
 	cfg := &config.Config{
 		Routes: map[string]*config.Route{
 			"disconnect-route": {
 				Name: "disconnect-route",
 				Upstream: config.Upstream{
 					Address:        upstreamAddr,
 					ConnectTimeout: 5 * time.Second,
 					ReadTimeout:    30 * time.Second,
 					WriteTimeout:   30 * time.Second,
 					MaxBodySize:    1024 * 1024,
 					AuthRequired:   false,
 				},
 			},
 		},
 	}
 	handler := New(cfg)
 	defer handler.Close()
 	server := httptest.NewServer(handler)
 	defer server.Close()
 	// Baseline goroutine count
 	baselineGoroutines := runtime.NumGoroutine()
 	// Make a request with a custom HTTP client that allows us to close the connection
 	client := &http.Client{
 		Timeout: 30 * time.Second,
 	}
 	req, err := http.NewRequest("GET", server.URL+"/disconnect", nil)
 	if err != nil {
 		t.Fatalf("request creation failed: %v", err)
 	}
 	resp, err := client.Do(req)
 	if err != nil {
 		t.Fatalf("request failed: %v", err)
 	}
 	defer resp.Body.Close()
 	// Read a few events
 	reader := bufio.NewReader(resp.Body)
 	for i := 0; i < 2; i++ {
 		line, err := reader.ReadString('\n')
 		if err != nil {
 			t.Fatalf("read failed: %v", err)
 		}
 		if !strings.Contains(line, "data:") {
 			i-- // skip non-data lines
 		}
 	}
 	// Close the response body (simulating client disconnect)
 	resp.Body.Close()
 	// Wait a bit for cancellation to propagate
 	time.Sleep(200 * time.Millisecond)
 	// Verify context was cancelled
 	contextCancelledMu.Lock()
 	cancelled := !contextCancelledAt.IsZero()
 	cancelDelay := time.Duration(0)
 	if cancelled {
 		cancelDelay = contextCancelledAt.Sub(upstreamRequestedAt)
 	}
 	contextCancelledMu.Unlock()
 	if !cancelled {
 		t.Errorf("expected upstream context to be cancelled, but it was not")
 	}
 	// Verify cancellation happened quickly (within 1s)
 	if cancelDelay > 1*time.Second {
 		t.Errorf("context cancellation took %.2fs (expected < 1s)", cancelDelay.Seconds())
 	}
 	// Wait a bit for goroutines to clean up
 	time.Sleep(100 * time.Millisecond)
 	// Check for goroutine leaks
 	finalGoroutines := runtime.NumGoroutine()
 	if finalGoroutines > baselineGoroutines+5 {
 		t.Errorf("possible goroutine leak: baseline=%d, final=%d", baselineGoroutines, finalGoroutines)
 	}
 }
@@ -10,7 +10,7 @@ import (
 	"testing"
 	"time"
-	"github.com/Riotpiaole/homelab-frontend/internal/config"
+	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
 )
 // TestConnectTimeout verifies that connections fail at the configured timeout.
@@ -0,0 +1,229 @@
 package proxy
 import (
 	"encoding/base64"
 	"encoding/json"
 	"fmt"
 	"net/http"
 	"net/url"
 	"strings"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/logging"
 )
 // exchangeRequest represents a token exchange request (RFC 8693 subset).
 type exchangeRequest struct {
 	SubjectToken string `json:"subject_token"`
 	ClientID     string `json:"client_id"`
 	ClientSecret string `json:"client_secret"`
 	Scope        string `json:"scope,omitempty"`
 	Resource     string `json:"resource,omitempty"`
 }
 // exchangeResponse wraps the service token with subject identity metadata.
 type exchangeResponse struct {
 	AccessToken     string `json:"access_token"`
 	TokenType       string `json:"token_type"`
 	ExpiresIn       int    `json:"expires_in"`
 	IssuedTokenType string `json:"issued_token_type,omitempty"`
 	Subject         string `json:"subject,omitempty"`
 	ActingParty     string `json:"acting_party,omitempty"`
 	GrantedScope    string `json:"scope,omitempty"`
 }
 // handleAuthExchange implements token exchange: a service presents a user's
 // JWT and its own credentials to get a scoped service token with the user's
 // identity attached.
 //
 // Flow:
 //  1. Validate subject_token (user's JWT) — signature, expiry, issuer
 //  2. Authenticate service via client_credentials against Authentik
 //  3. Verify requested scope is a subset of service's roles
 //  4. Return service token + subject identity metadata
 func (h *Handler) handleAuthExchange(w http.ResponseWriter, r *http.Request) {
 	if r.Method != "POST" {
 		writeProblemDetail(w, http.StatusMethodNotAllowed,
 			"about:blank#method-not-allowed", "Method Not Allowed",
 			"POST only", nil)
 		return
 	}
 	if h.jwtValidator == nil || h.config.Auth.TokenURL == "" {
 		writeProblemDetail(w, http.StatusServiceUnavailable,
 			"about:blank#not-configured", "Not Configured",
 			"token exchange not configured", nil)
 		return
 	}
 	var req exchangeRequest
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
 		writeProblemDetail(w, http.StatusBadRequest,
 			"about:blank#bad-request", "Bad Request",
 			"invalid JSON body", nil)
 		return
 	}
 	if req.SubjectToken == "" || req.ClientID == "" || req.ClientSecret == "" {
 		writeProblemDetail(w, http.StatusBadRequest,
 			"about:blank#bad-request", "Bad Request",
 			"subject_token, client_id, and client_secret are required", nil)
 		return
 	}
 	// Step 1: Validate subject token
 	subjectClaims, err := h.jwtValidator.ValidateBearerToken("Bearer " + req.SubjectToken)
 	if err != nil {
 		writeProblemDetail(w, http.StatusForbidden,
 			"about:blank#invalid-subject-token", "Invalid Subject Token",
 			fmt.Sprintf("subject token validation failed: %v", err), nil)
 		logging.Errorf("token exchange: invalid subject", err, map[string]string{
 			"path": "/auth/exchange",
 		})
 		return
 	}
 	subject := claimStr(subjectClaims, "sub")
 	// Step 2: Authenticate service via client_credentials
 	form := url.Values{
 		"grant_type":    {"client_credentials"},
 		"client_id":     {req.ClientID},
 		"client_secret": {req.ClientSecret},
 		"scope":         {"openid roles"},
 	}
 	resp, err := h.authHTTP.PostForm(h.config.Auth.TokenURL, form)
 	if err != nil {
 		writeProblemDetail(w, http.StatusBadGateway,
 			"about:blank#bad-gateway", "Bad Gateway",
 			"identity provider unreachable", nil)
 		logging.Errorf("token exchange: upstream error", err, map[string]string{
 			"path": "/auth/exchange",
 		})
 		return
 	}
 	defer resp.Body.Close()
 	if resp.StatusCode != http.StatusOK {
 		writeProblemDetail(w, http.StatusForbidden,
 			"about:blank#invalid-actor", "Invalid Actor Credentials",
 			fmt.Sprintf("service authentication failed (HTTP %d)", resp.StatusCode), nil)
 		return
 	}
 	var tokenResp struct {
 		AccessToken string `json:"access_token"`
 		ExpiresIn   int    `json:"expires_in"`
 	}
 	if err := json.NewDecoder(resp.Body).Decode(&tokenResp); err != nil {
 		writeProblemDetail(w, http.StatusBadGateway,
 			"about:blank#bad-gateway", "Bad Gateway",
 			"invalid response from identity provider", nil)
 		return
 	}
 	// Step 3: Decode service token to check roles
 	serviceRoles, err := extractRolesFromJWT(tokenResp.AccessToken)
 	if err != nil {
 		writeProblemDetail(w, http.StatusBadGateway,
 			"about:blank#bad-gateway", "Bad Gateway",
 			"cannot decode service token", nil)
 		return
 	}
 	if req.Scope != "" && !scopeSubset(req.Scope, serviceRoles) {
 		writeProblemDetail(w, http.StatusForbidden,
 			"about:blank#scope-escalation", "Scope Escalation Denied",
 			fmt.Sprintf("requested scope %q exceeds service roles %v", req.Scope, serviceRoles), nil)
 		return
 	}
 	grantedScope := req.Scope
 	if grantedScope == "" {
 		grantedScope = strings.Join(serviceRoles, " ")
 	}
 	// Step 4: Return service token with subject metadata
 	w.Header().Set("Content-Type", "application/json")
 	w.WriteHeader(http.StatusOK)
 	json.NewEncoder(w).Encode(exchangeResponse{
 		AccessToken:     tokenResp.AccessToken,
 		TokenType:       "Bearer",
 		ExpiresIn:       tokenResp.ExpiresIn,
 		IssuedTokenType: "urn:ietf:params:oauth:token-type:access_token",
 		Subject:         subject,
 		ActingParty:     req.ClientID,
 		GrantedScope:    grantedScope,
 	})
 }
 // scopeSubset checks that every space-separated scope token is in allowed roles.
 func scopeSubset(requested string, allowed []string) bool {
 	allowedSet := make(map[string]bool, len(allowed))
 	for _, r := range allowed {
 		allowedSet[r] = true
 	}
 	if allowedSet["*"] {
 		return true
 	}
 	for _, s := range strings.Fields(requested) {
 		if !allowedSet[s] {
 			return false
 		}
 	}
 	return true
 }
 // extractRolesFromJWT decodes the payload of a JWT without verification
 // and returns the "roles" claim. Used after the token was already obtained
 // from a trusted source (Authentik client_credentials response).
 func extractRolesFromJWT(token string) ([]string, error) {
 	parts := strings.SplitN(token, ".", 3)
 	if len(parts) != 3 {
 		return nil, fmt.Errorf("invalid JWT format")
 	}
 	payload, err := base64.RawURLEncoding.DecodeString(parts[1])
 	if err != nil {
 		return nil, fmt.Errorf("base64 decode failed: %w", err)
 	}
 	var claims map[string]interface{}
 	if err := json.Unmarshal(payload, &claims); err != nil {
 		return nil, fmt.Errorf("JSON decode failed: %w", err)
 	}
 	return claimStrSlice(claims, "roles"), nil
 }
 // claimStr extracts a string claim.
 func claimStr(claims map[string]interface{}, key string) string {
 	v, ok := claims[key]
 	if !ok || v == nil {
 		return ""
 	}
 	s, ok := v.(string)
 	if !ok {
 		return ""
 	}
 	return s
 }
 // claimStrSlice extracts a string slice from a JSON-deserialized []interface{}.
 func claimStrSlice(claims map[string]interface{}, key string) []string {
 	v, ok := claims[key]
 	if !ok || v == nil {
 		return nil
 	}
 	raw, ok := v.([]interface{})
 	if !ok {
 		return nil
 	}
 	out := make([]string, 0, len(raw))
 	for _, item := range raw {
 		if s, ok := item.(string); ok && s != "" {
 			out = append(out, s)
 		}
 	}
 	return out
 }
@@ -0,0 +1,215 @@
 package proxy
 import (
 	"encoding/base64"
 	"encoding/json"
 	"fmt"
 	"net/http"
 	"net/http/httptest"
 	"strings"
 	"testing"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/auth"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
 )
 // fakeJWT creates a JWT-shaped string (header.payload.signature) with given claims.
 // Not cryptographically signed — used only with stubbed validators.
 func fakeJWT(claims map[string]interface{}) string {
 	header := base64.RawURLEncoding.EncodeToString([]byte(`{"alg":"none","typ":"JWT"}`))
 	payload, _ := json.Marshal(claims)
 	payloadB64 := base64.RawURLEncoding.EncodeToString(payload)
 	return header + "." + payloadB64 + ".fakesig"
 }
 // stubJWTValidator returns claims from a pre-set map keyed by token.
 type stubJWTValidator struct {
 	tokens map[string]map[string]interface{}
 }
 func (s *stubJWTValidator) ValidateBearerToken(authHeader string) (map[string]interface{}, error) {
 	token := strings.TrimPrefix(authHeader, "Bearer ")
 	if claims, ok := s.tokens[token]; ok {
 		return claims, nil
 	}
 	return nil, fmt.Errorf("invalid token")
 }
 func (s *stubJWTValidator) CheckPermissions(claims map[string]interface{}, required ...string) bool {
 	return true
 }
 // We can't use stubJWTValidator directly because Handler expects *auth.Validator.
 // Instead, test via the endpoint with a real JWKS server or test the helpers directly.
 func TestScopeSubset(t *testing.T) {
 	tests := []struct {
 		requested string
 		allowed   []string
 		want      bool
 	}{
 		{"memory:read", []string{"llm:inference", "memory:read"}, true},
 		{"memory:read memory:write", []string{"memory:read", "memory:write"}, true},
 		{"memory:write", []string{"memory:read"}, false},
 		{"admin:*", []string{"memory:read"}, false},
 		{"anything", []string{"*"}, true},
 		{"", []string{"memory:read"}, true},
 		{"memory:read", []string{}, false},
 	}
 	for _, tt := range tests {
 		got := scopeSubset(tt.requested, tt.allowed)
 		if got != tt.want {
 			t.Errorf("scopeSubset(%q, %v) = %v, want %v", tt.requested, tt.allowed, got, tt.want)
 		}
 	}
 }
 func TestExtractRolesFromJWT(t *testing.T) {
 	token := fakeJWT(map[string]interface{}{
 		"roles": []interface{}{"llm:inference", "memory:read"},
 		"sub":   "test-user",
 	})
 	roles, err := extractRolesFromJWT(token)
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
 	if len(roles) != 2 || roles[0] != "llm:inference" || roles[1] != "memory:read" {
 		t.Errorf("roles = %v, want [llm:inference memory:read]", roles)
 	}
 }
 func TestExtractRolesFromJWT_InvalidFormat(t *testing.T) {
 	_, err := extractRolesFromJWT("not-a-jwt")
 	if err == nil {
 		t.Error("expected error for invalid JWT")
 	}
 }
 func TestExtractRolesFromJWT_NoRoles(t *testing.T) {
 	token := fakeJWT(map[string]interface{}{"sub": "user"})
 	roles, err := extractRolesFromJWT(token)
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
 	if roles != nil {
 		t.Errorf("expected nil roles, got %v", roles)
 	}
 }
 func TestHandleAuthExchange_WrongMethod(t *testing.T) {
 	h := newTestHandler("https://auth.example.com/token/", "api-gw", "secret", &stubAuthClient{})
 	h.jwtValidator = auth.NewValidator("", "", "")
 	r := httptest.NewRequest("GET", "/auth/exchange", nil)
 	w := httptest.NewRecorder()
 	h.handleAuthExchange(w, r)
 	if w.Code != 405 {
 		t.Errorf("expected 405, got %d", w.Code)
 	}
 }
 func TestHandleAuthExchange_NotConfigured(t *testing.T) {
 	h := &Handler{
 		config: &config.Config{},
 		routes: make(map[string]*Route),
 		transports: make(map[string]*http.Transport),
 	}
 	body := `{"subject_token":"x","client_id":"y","client_secret":"z"}`
 	r := httptest.NewRequest("POST", "/auth/exchange", strings.NewReader(body))
 	w := httptest.NewRecorder()
 	h.handleAuthExchange(w, r)
 	if w.Code != 503 {
 		t.Errorf("expected 503, got %d", w.Code)
 	}
 }
 func TestHandleAuthExchange_MissingFields(t *testing.T) {
 	h := newTestHandler("https://auth.example.com/token/", "api-gw", "secret", &stubAuthClient{})
 	h.jwtValidator = auth.NewValidator("", "", "")
 	tests := []struct {
 		name string
 		body string
 	}{
 		{"missing subject", `{"client_id":"x","client_secret":"y"}`},
 		{"missing client_id", `{"subject_token":"x","client_secret":"y"}`},
 		{"missing client_secret", `{"subject_token":"x","client_id":"y"}`},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			r := httptest.NewRequest("POST", "/auth/exchange", strings.NewReader(tt.body))
 			w := httptest.NewRecorder()
 			h.handleAuthExchange(w, r)
 			if w.Code != 400 {
 				t.Errorf("expected 400, got %d", w.Code)
 			}
 		})
 	}
 }
 func TestHandleAuthExchange_InvalidJSON(t *testing.T) {
 	h := newTestHandler("https://auth.example.com/token/", "api-gw", "secret", &stubAuthClient{})
 	h.jwtValidator = auth.NewValidator("", "", "")
 	r := httptest.NewRequest("POST", "/auth/exchange", strings.NewReader("not json"))
 	w := httptest.NewRecorder()
 	h.handleAuthExchange(w, r)
 	if w.Code != 400 {
 		t.Errorf("expected 400, got %d", w.Code)
 	}
 }
 func TestHandleAuthExchange_ScopeEscalation(t *testing.T) {
 	// Test scopeSubset directly since full integration needs JWKS
 	if scopeSubset("admin:delete", []string{"memory:read", "memory:write"}) {
 		t.Error("scope escalation should be denied")
 	}
 	if !scopeSubset("memory:read", []string{"memory:read", "memory:write"}) {
 		t.Error("valid scope should be allowed")
 	}
 }
 func TestClaimStr(t *testing.T) {
 	claims := map[string]interface{}{"sub": "user-1", "num": 42, "nil": nil}
 	if got := claimStr(claims, "sub"); got != "user-1" {
 		t.Errorf("claimStr(sub) = %q, want user-1", got)
 	}
 	if got := claimStr(claims, "num"); got != "" {
 		t.Errorf("claimStr(num) = %q, want empty", got)
 	}
 	if got := claimStr(claims, "nil"); got != "" {
 		t.Errorf("claimStr(nil) = %q, want empty", got)
 	}
 	if got := claimStr(claims, "missing"); got != "" {
 		t.Errorf("claimStr(missing) = %q, want empty", got)
 	}
 }
 func TestClaimStrSlice(t *testing.T) {
 	claims := map[string]interface{}{
 		"roles": []interface{}{"a", "b", "", nil, 42},
 		"empty": []interface{}{},
 		"str":   "not-a-slice",
 	}
 	if got := claimStrSlice(claims, "roles"); len(got) != 2 || got[0] != "a" || got[1] != "b" {
 		t.Errorf("claimStrSlice(roles) = %v, want [a b]", got)
 	}
 	if got := claimStrSlice(claims, "empty"); len(got) != 0 {
 		t.Errorf("claimStrSlice(empty) = %v, want empty", got)
 	}
 	if got := claimStrSlice(claims, "str"); got != nil {
 		t.Errorf("claimStrSlice(str) = %v, want nil", got)
 	}
 	if got := claimStrSlice(claims, "missing"); got != nil {
 		t.Errorf("claimStrSlice(missing) = %v, want nil", got)
 	}
 }
@@ -11,7 +11,7 @@ import (
 	"testing"
 	"time"
-	"github.com/Riotpiaole/homelab-frontend/internal/config"
+	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
 )
 // OpenAI-style tool definition
@@ -9,7 +9,7 @@ import (
 	"strings"
 	"testing"
-	"github.com/Riotpiaole/homelab-frontend/internal/config"
+	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
 )
 // RFC 9457 Problem Details
@@ -0,0 +1,135 @@
 package resilience
 import (
 	"context"
 	"math/rand"
 	"net/http"
 	"time"
 )
 // RetryConfig holds retry settings.
 type RetryConfig struct {
 	// MaxAttempts is the maximum number of attempts (includes initial).
 	MaxAttempts int
 	// InitialBackoff is the initial backoff duration.
 	InitialBackoff time.Duration
 	// MaxBackoff is the maximum backoff duration.
 	MaxBackoff time.Duration
 	// BackoffMultiplier is the exponential backoff multiplier.
 	BackoffMultiplier float64
 }
 // DefaultRetryConfig provides sensible defaults.
 func DefaultRetryConfig() *RetryConfig {
 	return &RetryConfig{
 		MaxAttempts:       3,
 		InitialBackoff:    100 * time.Millisecond,
 		MaxBackoff:        2 * time.Second,
 		BackoffMultiplier: 2.0,
 	}
 }
 // RetryFunc executes a function with blind retry on 5xx.
 // Returns the response and any error from the function itself (not retry logic).
 type RetryFunc func(ctx context.Context, attempt int) (*http.Response, error)
 // DoRetry executes the function with exponential backoff on 5xx responses.
 // Returns the final response (could be 5xx if all retries exhausted) and any error.
 func DoRetry(ctx context.Context, cfg *RetryConfig, fn RetryFunc) (*http.Response, error) {
 	if cfg == nil {
 		cfg = DefaultRetryConfig()
 	}
 	var lastResp *http.Response
 	var lastErr error
 	for attempt := 0; attempt < cfg.MaxAttempts; attempt++ {
 		// Check context before attempting
 		select {
 		case <-ctx.Done():
 			if lastResp != nil {
 				lastResp.Body.Close()
 			}
 			return nil, ctx.Err()
 		default:
 		}
 		resp, err := fn(ctx, attempt)
 		if err != nil {
 			lastErr = err
 			// Don't retry on network errors in the retry loop itself
 			// Let caller decide if those should be retried
 			return nil, err
 		}
 		// Success (not 5xx)
 		if resp.StatusCode < 500 {
 			return resp, nil
 		}
 		// 5xx — close and retry
 		if lastResp != nil {
 			lastResp.Body.Close()
 		}
 		lastResp = resp
 		// If this was the last attempt, return the 5xx response
 		if attempt == cfg.MaxAttempts-1 {
 			return resp, nil
 		}
 		// Calculate backoff with jitter
 		backoff := calculateBackoff(attempt, cfg)
 		select {
 		case <-ctx.Done():
 			resp.Body.Close()
 			return nil, ctx.Err()
 		case <-time.After(backoff):
 			// Continue to next attempt
 		}
 	}
 	return lastResp, lastErr
 }
 // calculateBackoff computes exponential backoff with jitter.
 func calculateBackoff(attempt int, cfg *RetryConfig) time.Duration {
 	// Exponential: initial * (multiplier ^ attempt)
 	backoff := time.Duration(float64(cfg.InitialBackoff) * (pow(cfg.BackoffMultiplier, float64(attempt))))
 	// Cap at max
 	if backoff > cfg.MaxBackoff {
 		backoff = cfg.MaxBackoff
 	}
 	// Add jitter: ±20%
 	jitterRange := backoff / 5
 	if jitterRange <= 0 {
 		return backoff
 	}
 	jitter := time.Duration(rand.Int63n(int64(2 * jitterRange)) - int64(jitterRange))
 	return backoff + jitter
 }
 func pow(base, exp float64) float64 {
 	result := 1.0
 	for i := 0; i < int(exp); i++ {
 		result *= base
 	}
 	return result
 }
 // RetryPolicy determines whether to retry based on response and config.
 type RetryPolicy struct {
 	Retryable bool // Whether this adapter allows retries
 }
 // ShouldRetry determines if a response should be retried.
 func (p *RetryPolicy) ShouldRetry(resp *http.Response) bool {
 	if !p.Retryable {
 		return false
 	}
 	return resp != nil && resp.StatusCode >= 500
 }
@@ -0,0 +1,158 @@
 package resilience
 import (
 	"context"
 	"io"
 	"net/http"
 	"strings"
 	"testing"
 	"time"
 )
 func TestRetryOnSuccess(t *testing.T) {
 	cfg := &RetryConfig{MaxAttempts: 3}
 	attempts := 0
 	resp, err := DoRetry(context.Background(), cfg, func(ctx context.Context, attempt int) (*http.Response, error) {
 		attempts++
 		return &http.Response{
 			StatusCode: 200,
 			Body:       io.NopCloser(strings.NewReader("ok")),
 		}, nil
 	})
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
 	if attempts != 1 {
 		t.Errorf("expected 1 attempt on success, got %d", attempts)
 	}
 	if resp.StatusCode != 200 {
 		t.Errorf("expected status 200, got %d", resp.StatusCode)
 	}
 	resp.Body.Close()
 }
 func TestRetryOn5xx(t *testing.T) {
 	cfg := &RetryConfig{
 		MaxAttempts:       3,
 		InitialBackoff:    10 * time.Millisecond,
 		MaxBackoff:        50 * time.Millisecond,
 		BackoffMultiplier: 2.0,
 	}
 	attempts := 0
 	resp, err := DoRetry(context.Background(), cfg, func(ctx context.Context, attempt int) (*http.Response, error) {
 		attempts++
 		if attempt < 2 {
 			// First two attempts return 503
 			return &http.Response{
 				StatusCode: 503,
 				Body:       io.NopCloser(strings.NewReader("unavailable")),
 			}, nil
 		}
 		// Third attempt succeeds
 		return &http.Response{
 			StatusCode: 200,
 			Body:       io.NopCloser(strings.NewReader("ok")),
 		}, nil
 	})
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
 	if attempts != 3 {
 		t.Errorf("expected 3 attempts (2 retries), got %d", attempts)
 	}
 	if resp.StatusCode != 200 {
 		t.Errorf("expected status 200, got %d", resp.StatusCode)
 	}
 	resp.Body.Close()
 }
 func TestRetryExhaustion(t *testing.T) {
 	cfg := &RetryConfig{
 		MaxAttempts:    2,
 		InitialBackoff: 10 * time.Millisecond,
 		MaxBackoff:     50 * time.Millisecond,
 	}
 	attempts := 0
 	resp, err := DoRetry(context.Background(), cfg, func(ctx context.Context, attempt int) (*http.Response, error) {
 		attempts++
 		// Always return 503
 		return &http.Response{
 			StatusCode: 503,
 			Body:       io.NopCloser(strings.NewReader("unavailable")),
 		}, nil
 	})
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
 	if attempts != 2 {
 		t.Errorf("expected 2 attempts (max), got %d", attempts)
 	}
 	if resp.StatusCode != 503 {
 		t.Errorf("expected status 503, got %d", resp.StatusCode)
 	}
 	resp.Body.Close()
 }
 func TestRetryWithContext(t *testing.T) {
 	cfg := &RetryConfig{MaxAttempts: 10}
 	attempts := 0
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 	// Cancel after a short delay
 	go func() {
 		time.Sleep(50 * time.Millisecond)
 		cancel()
 	}()
 	resp, err := DoRetry(ctx, cfg, func(ctx context.Context, attempt int) (*http.Response, error) {
 		attempts++
 		time.Sleep(30 * time.Millisecond)
 		return &http.Response{
 			StatusCode: 503,
 			Body:       io.NopCloser(strings.NewReader("unavailable")),
 		}, nil
 	})
 	if err != context.Canceled {
 		t.Errorf("expected context.Canceled error, got: %v", err)
 	}
 	if resp != nil {
 		resp.Body.Close()
 	}
 	// Should have fewer than all attempts due to cancellation
 	if attempts >= 10 {
 		t.Errorf("expected fewer than 10 attempts due to cancellation, got %d", attempts)
 	}
 }
 func TestRetryPolicyShouldRetry(t *testing.T) {
 	policy := &RetryPolicy{Retryable: true}
 	resp503 := &http.Response{StatusCode: 503}
 	if !policy.ShouldRetry(resp503) {
 		t.Errorf("expected to retry on 503")
 	}
 	resp200 := &http.Response{StatusCode: 200}
 	if policy.ShouldRetry(resp200) {
 		t.Errorf("expected not to retry on 200")
 	}
 	resp404 := &http.Response{StatusCode: 404}
 	if policy.ShouldRetry(resp404) {
 		t.Errorf("expected not to retry on 404")
 	}
 	policyNoRetry := &RetryPolicy{Retryable: false}
 	if policyNoRetry.ShouldRetry(resp503) {
 		t.Errorf("expected not to retry when retryable=false")
 	}
 }
@@ -8,7 +8,7 @@ import (
 	"testing"
 	"time"
-	"github.com/Riotpiaole/homelab-frontend/internal/server"
+	"forgejo.riotpiao.com/rock/homelab-frontend/internal/server"
 )
 // TestHealthEndpoints verifies health endpoint behavior.
@@ -2,35 +2,90 @@ package server
 import (
 	"net/http"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/serviceadapter"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/webhook"
 )
-// Router implements an HTTP handler that routes health endpoints
+// Router implements an HTTP handler that routes health endpoints,
-// and passes other requests to an upstream handler.
+// ServiceAdapter X-Service requests, Temporal workflow endpoints,
 // and other requests to upstream handlers.
 type Router struct {
 	healthChecker     *HealthChecker
 	dispatcher        *serviceadapter.Dispatcher
 	temporalHandler   http.Handler
 	upstreamHandler   http.Handler
 	forgejoWebhook    *webhook.ForgejoHandler
 	metricsHandler    http.Handler
 }
 // NewRouter creates a new router with health endpoints.
 // Health endpoints (/healthz and /readyz) are handled locally.
 // X-Service requests are dispatched via ServiceAdapter CRD.
 // Temporal endpoints (/workflow*) are routed to temporalHandler.
 // All other paths are passed to the upstream handler.
-func NewRouter(healthChecker *HealthChecker, upstreamHandler http.Handler) *Router {
+func NewRouter(healthChecker *HealthChecker, dispatcher *serviceadapter.Dispatcher, temporalHandler http.Handler, upstreamHandler http.Handler) *Router {
 	return &Router{
-		healthChecker:   healthChecker,
+		healthChecker:  healthChecker,
 		dispatcher:     dispatcher,
 		temporalHandler: temporalHandler,
 		upstreamHandler: upstreamHandler,
 		forgejoWebhook: webhook.NewForgejoHandler(),
 	}
 }
 // SetMetricsHandler registers the Prometheus /metrics endpoint handler.
 func (r *Router) SetMetricsHandler(h http.Handler) {
 	r.metricsHandler = h
 }
 // ServeHTTP implements http.Handler.
-// It routes /healthz and /readyz to health handlers,
+// Priority order:
-// and passes all other paths to the upstream handler.
+// 1. /healthz and /readyz to health handlers
 // 2. X-Service header to ServiceAdapter dispatcher (phase 8) - PREFERRED routing method
 // 3. /workflow* to temporal handler - DEPRECATED: use X-Service: workflow instead
 // 4. All other paths to upstream handler (phase 0-7)
 func (r *Router) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 	// Health endpoints first
 	switch req.URL.Path {
 	case "/healthz":
 		LivenessHandler(r.healthChecker)(w, req)
 		return
 	case "/readyz":
 		ReadinessHandler(r.healthChecker)(w, req)
-	default:
+		return
-		r.upstreamHandler.ServeHTTP(w, req)
+	case "/metrics":
 		if r.metricsHandler != nil {
 			r.metricsHandler.ServeHTTP(w, req)
 			return
 		}
 	}
 	// X-Service (ServiceAdapter) routing - checked before path-based routing
 	// PREFERRED: All service routing should use X-Service header pattern for consistency,
 	// auth enforcement, and resource-based access control.
 	if req.Header.Get("X-Service") != "" {
 		if r.dispatcher != nil {
 			r.dispatcher.Dispatch(w, req)
 			return
 		}
 	}
 	// Forgejo webhook receiver — no auth, HMAC-verified by handler
 	if req.URL.Path == "/v1/webhooks/forgejo" {
 		r.forgejoWebhook.ServeHTTP(w, req)
 		return
 	}
 	// Workflow endpoints
 	// DEPRECATED: Path-based /workflow routing is legacy.
 	// New clients should use X-Service: workflow header instead for consistent auth.
 	switch req.URL.Path {
 	case "/workflow", "/workflow/health", "/workflow/metrics":
 		r.temporalHandler.ServeHTTP(w, req)
 		return
 	}
 	// Default: upstream handler (all other paths)
 	r.upstreamHandler.ServeHTTP(w, req)
 }
@@ -6,6 +6,8 @@ import (
 	"net/http"
 	"sync"
 	"time"
 	"golang.org/x/net/http2"
 )
 // Server wraps an HTTP server with graceful shutdown support.
@@ -19,14 +21,30 @@ type Server struct {
 // New creates a new Server with the given configuration.
 func New(listenAddr string, shutdownTimeout time.Duration, handler http.Handler) *Server {
 	httpServer := &http.Server{
 		Addr:    listenAddr,
 		Handler: handler,
 		// ReadHeaderTimeout (not ReadTimeout) and a long WriteTimeout: both
 		// ReadTimeout and WriteTimeout are absolute deadlines covering the
 		// whole request/response body, not inactivity timeouts -- a 15s
 		// WriteTimeout here was killing in-progress LLM SSE streams (proxy.go's
 		// outbound transport deliberately avoids this same mistake). Mirrors
 		// the edge nginx Ingress's proxy-read/send-timeout of 3600s.
 		ReadHeaderTimeout: 15 * time.Second,
 		WriteTimeout:      1 * time.Hour,
 		IdleTimeout:       60 * time.Second,
 	}
 	// Issue #32: Enable HTTP/2 for multiplexing concurrent streams.
 	// This allows multiple LLM requests over a single connection,
 	// improving throughput and reducing latency for concurrent clients.
 	if err := http2.ConfigureServer(httpServer, nil); err != nil {
 		// Silently fail HTTP/2 config (shouldn't happen, but gracefully degrade)
 		// Server will still work with HTTP/1.1
 	}
 	return &Server{
-		httpServer: &http.Server{
+		httpServer:      httpServer,
 			Addr:         listenAddr,
 			Handler:      handler,
 			ReadTimeout:  15 * time.Second,
 			WriteTimeout: 15 * time.Second,
 			IdleTimeout:  60 * time.Second,
 		},
 		shutdownTimeout: shutdownTimeout,
 		healthChecker:   NewHealthChecker(false, false),
 	}
@@ -10,7 +10,7 @@ import (
 	"testing"
 	"time"
-	"github.com/Riotpiaole/homelab-frontend/internal/server"
+	"forgejo.riotpiao.com/rock/homelab-frontend/internal/server"
 )
 // TestGracefulShutdown verifies that:
@@ -0,0 +1,37 @@
 package serviceadapter
 // SQSAdapter handles X-Service: sqs requests.
 type SQSAdapter struct{}
 // S3Adapter handles X-Service: s3 requests.
 type S3Adapter struct{}
 // IAMAdapter handles X-Service: iam requests.
 type IAMAdapter struct{}
 // MemoryAdapter handles X-Service: memory requests (core + extended).
 type MemoryAdapter struct{
 	// Extended resources: notes, context, nodes (git-aware)
 	// Requires M3.5.6+, M3.7.7+, M3.7.8+, M3.5.9
 }
 // AdapterFactory creates adapters by type.
 func AdapterFactory(serviceName string) interface{} {
 	switch serviceName {
 	case "workflow":
 		return &WorkflowAdapter{}
 	case "sqs":
 		return &SQSAdapter{}
 	case "s3":
 		return &S3Adapter{}
 	case "iam":
 		return &IAMAdapter{}
 	case "memory":
 		return &MemoryAdapter{}
 	case "sessions":
 		// code-registered; see NewSessionAdapter()
 		return nil
 	default:
 		return nil
 	}
 }
@@ -0,0 +1,67 @@
 package serviceadapter
 import "os"
 // NewMemoryAdapter creates a code-registered ServiceAdapter for the memory service.
 // Takes precedence over any config-file loaded memory adapter (main.go skips config
 // adapters when a code-registered one with the same name exists).
 // Upstream URL configured via MEMORY_UPSTREAM_URL env var.
 func NewMemoryAdapter() *ServiceAdapter {
 	upstreamURL := os.Getenv("MEMORY_UPSTREAM_URL")
 	if upstreamURL == "" {
 		upstreamURL = "http://poimen-memory.poimen.svc.cluster.local:8080"
 	}
 	return &ServiceAdapter{
 		Namespace:   "poimen",
 		ServiceName: "memory",
 		Spec:        *GetMemorySpec(upstreamURL),
 	}
 }
 // GetMemorySpec returns the ServiceAdapter spec for the memory service.
 func GetMemorySpec(upstreamURL string) *Spec {
 	return &Spec{
 		ServiceName: "memory",
 		Upstream: Upstream{
 			URL:            upstreamURL,
 			TimeoutSeconds: 30,
 		},
 		Auth: Auth{
 			Required:   true,
 			Capability: "memory:read",
 		},
 		Resources: []Resource{
 			{
 				Name: "ingest",
 				Methods: []Method{{
 					Verb:         "POST",
 					UpstreamPath: "/memory/ingest",
 					Auth:         &Auth{Required: true, Capability: "memory:write"},
 				}},
 			},
 			{
 				Name: "query",
 				Methods: []Method{{
 					Verb:         "POST",
 					UpstreamPath: "/memory/query",
 					Auth:         &Auth{Required: true, Capability: "memory:read"},
 				}},
 			},
 			{
 				Name: "skills",
 				Methods: []Method{{
 					Verb:         "GET",
 					UpstreamPath: "/memory/skills",
 				}},
 			},
 			{
 				Name: "standing-context",
 				Methods: []Method{{
 					Verb:         "POST",
 					UpstreamPath: "/memory/standing-context",
 					Auth:         &Auth{Required: true, Capability: "memory:read"},
 				}},
 			},
 		},
 	}
 }
@@ -0,0 +1,100 @@
 package serviceadapter
 import (
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/temporal"
 )
 // NewPoimenAdapter creates a ServiceAdapter for the Poimen orchestrator service.
 func NewPoimenAdapter(h *temporal.Handler) *ServiceAdapter {
 	return &ServiceAdapter{
 		Namespace:   "poimen",
 		ServiceName: "poimen",
 		Handler:     temporal.NewPoimenHandler(h),
 		Spec:        *GetPoimenSpec(),
 	}
 }
 // GetPoimenSpec returns the ServiceAdapter spec for the Poimen service.
 func GetPoimenSpec() *Spec {
 	return &Spec{
 		ServiceName: "poimen",
 		Upstream: Upstream{
 			URL:            "internal://poimen",
 			TimeoutSeconds: 60,
 		},
 		Auth: Auth{
 			Required:   true,
 			Capability: "workflow:read",
 		},
 		Resources: []Resource{
 			{
 				Name: "plan",
 				Methods: []Method{{
 					Verb:         "POST",
 					UpstreamPath: "/v1/poimen/plan",
 					Auth:         &Auth{Required: true, Capability: "workflow:execute"},
 				}},
 			},
 			{
 				Name: "execute",
 				Methods: []Method{{
 					Verb:         "POST",
 					UpstreamPath: "/v1/poimen/execute",
 					Auth:         &Auth{Required: true, Capability: "workflow:execute"},
 				}},
 			},
 			{
 				Name: "executions",
 				Methods: []Method{
 					{
 						Verb:         "GET",
 						UpstreamPath: "/v1/poimen/executions",
 						Auth:         &Auth{Required: true, Capability: "workflow:read"},
 					},
 				},
 			},
 			// Note: workflow_id is passed as ?workflow_id=xxx query param,
 			// not as a path segment. The ServiceAdapter dispatcher does not
 			// substitute path parameters.
 			{
 				Name: "execution-detail",
 				Methods: []Method{
 					{
 						Verb:         "GET",
 						UpstreamPath: "/v1/poimen/executions/detail",
 						Auth:         &Auth{Required: true, Capability: "workflow:read"},
 					},
 					{
 						Verb:         "DELETE",
 						UpstreamPath: "/v1/poimen/executions/detail",
 						Auth:         &Auth{Required: true, Capability: "workflow:execute"},
 					},
 				},
 			},
 			{
 				Name: "execution-history",
 				Methods: []Method{{
 					Verb:         "GET",
 					UpstreamPath: "/v1/poimen/executions/history",
 					Auth:         &Auth{Required: true, Capability: "workflow:read"},
 				}},
 			},
 			{
 				Name: "execution-stream",
 				Methods: []Method{{
 					Verb:         "GET",
 					UpstreamPath: "/v1/poimen/executions/stream",
 					Auth:         &Auth{Required: true, Capability: "workflow:read"},
 				}},
 			},
 			{
 				Name: "execution-signal",
 				Methods: []Method{{
 					Verb:         "POST",
 					UpstreamPath: "/v1/poimen/executions/signal",
 					Auth:         &Auth{Required: true, Capability: "workflow:execute"},
 				}},
 			},
 		},
 	}
 }
@@ -0,0 +1,283 @@
 // +build integration
 package serviceadapter
 import (
 	"bytes"
 	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
 	"os"
 	"strconv"
 	"strings"
 	"testing"
 	"time"
 )
 // TestRealIntegration tests that the gateway correctly routes requests to upstreams.
 // Services may return 404/errors if paths don't match their actual API.
 func TestRealIntegration(t *testing.T) {
 	gatewayURL := os.Getenv("GATEWAY_URL")
 	if gatewayURL == "" {
 		gatewayURL = "http://localhost:8080"
 	}
 	authentikURL := os.Getenv("AUTHENTIK_URL")
 	if authentikURL == "" {
 		authentikURL = "https://authentik.riotpiao.com"
 	}
 	clientID := os.Getenv("AUTHENTIK_CLIENT_ID")
 	clientSecret := os.Getenv("AUTHENTIK_CLIENT_SECRET")
 	skipAuthTests := clientID == "" || clientSecret == ""
 	timeoutStr := os.Getenv("TEST_TIMEOUT")
 	timeout := 30
 	if t, err := strconv.Atoi(timeoutStr); err == nil {
 		timeout = t
 	}
 	client := &http.Client{Timeout: time.Duration(timeout) * time.Second}
 	var jwtToken string
 	if !skipAuthTests {
 		t.Run("get JWT from Authentik", func(t *testing.T) {
 			data := fmt.Sprintf("grant_type=client_credentials&client_id=%s&client_secret=%s&scope=openid",
 				clientID, clientSecret)
 			resp, err := http.Post(
 				authentikURL+"/application/o/token/",
 				"application/x-www-form-urlencoded",
 				strings.NewReader(data),
 			)
 			if err != nil {
 				t.Fatalf("failed to get token: %v", err)
 			}
 			defer resp.Body.Close()
 			if resp.StatusCode != http.StatusOK {
 				body, _ := io.ReadAll(resp.Body)
 				t.Fatalf("token request failed (%d): %s", resp.StatusCode, string(body))
 			}
 			var tokenResp struct {
 				AccessToken string `json:"access_token"`
 			}
 			if err := json.NewDecoder(resp.Body).Decode(&tokenResp); err != nil {
 				t.Fatalf("failed to parse token response: %v", err)
 			}
 			jwtToken = tokenResp.AccessToken
 			t.Logf("✅ Got JWT token")
 		})
 	}
 	// Test that gateway routes and passes through Authorization header
 	// Services may return 404 if paths don't exist, but that's OK
 	// We're testing that the request reached the service, not that it succeeded
 	t.Run("SQS routing", func(t *testing.T) {
 		payload := map[string]interface{}{"queue": "test"}
 		body, _ := json.Marshal(payload)
 		req, err := http.NewRequest("POST", gatewayURL+"/", bytes.NewReader(body))
 		if err != nil {
 			t.Fatalf("failed to create request: %v", err)
 		}
 		req.Header.Set("X-Service", "sqs")
 		req.Header.Set("X-Resource", "send-message")
 		req.Header.Set("Content-Type", "application/json")
 		resp, err := client.Do(req)
 		if err != nil {
 			t.Logf("SQS unreachable: %v", err)
 			t.Skip()
 		}
 		defer resp.Body.Close()
 		// Any response (even 404) means gateway routed it
 		// 502/503 means service unreachable
 		if resp.StatusCode >= 500 {
 			t.Logf("SQS backend unreachable (%d)", resp.StatusCode)
 			t.Skip()
 		}
 		t.Logf("✅ SQS routed: %d", resp.StatusCode)
 	})
 	t.Run("S3 routing", func(t *testing.T) {
 		req, err := http.NewRequest("GET", gatewayURL+"/", nil)
 		if err != nil {
 			t.Fatalf("failed to create request: %v", err)
 		}
 		req.Header.Set("X-Service", "s3")
 		req.Header.Set("X-Resource", "list-objects")
 		if !skipAuthTests && jwtToken != "" {
 			req.Header.Set("Authorization", "Bearer "+jwtToken)
 			t.Logf("Testing with JWT")
 		}
 		resp, err := client.Do(req)
 		if err != nil {
 			t.Logf("MinIO unreachable: %v", err)
 			t.Skip()
 		}
 		defer resp.Body.Close()
 		if resp.StatusCode >= 500 {
 			t.Logf("MinIO backend unreachable (%d)", resp.StatusCode)
 			t.Skip()
 		}
 		t.Logf("✅ S3 routed: %d", resp.StatusCode)
 	})
 	t.Run("Memory routing", func(t *testing.T) {
 		payload := map[string]interface{}{"query": "test"}
 		body, _ := json.Marshal(payload)
 		req, err := http.NewRequest("POST", gatewayURL+"/", bytes.NewReader(body))
 		if err != nil {
 			t.Fatalf("failed to create request: %v", err)
 		}
 		req.Header.Set("X-Service", "memory")
 		req.Header.Set("X-Resource", "query")
 		req.Header.Set("Content-Type", "application/json")
 		resp, err := client.Do(req)
 		if err != nil {
 			t.Logf("Memory unreachable: %v", err)
 			t.Skip()
 		}
 		defer resp.Body.Close()
 		if resp.StatusCode >= 500 {
 			t.Logf("Memory backend unreachable (%d)", resp.StatusCode)
 			t.Skip()
 		}
 		t.Logf("✅ Memory routed: %d", resp.StatusCode)
 	})
 	t.Run("IAM routing with JWT", func(t *testing.T) {
 		if skipAuthTests {
 			t.Skip("No JWT token")
 		}
 		req, err := http.NewRequest("GET", gatewayURL+"/", nil)
 		if err != nil {
 			t.Fatalf("failed to create request: %v", err)
 		}
 		req.Header.Set("X-Service", "iam")
 		req.Header.Set("X-Resource", "list-roles")
 		req.Header.Set("Authorization", "Bearer "+jwtToken)
 		resp, err := client.Do(req)
 		if err != nil {
 			t.Logf("Authentik unreachable: %v", err)
 			t.Skip()
 		}
 		defer resp.Body.Close()
 		if resp.StatusCode >= 500 {
 			t.Logf("Authentik backend unreachable (%d)", resp.StatusCode)
 			t.Skip()
 		}
 		t.Logf("✅ IAM routed: %d", resp.StatusCode)
 	})
 	t.Run("SQS JWT validation: reject without token", func(t *testing.T) {
 		payload := map[string]interface{}{"queue": "test"}
 		body, _ := json.Marshal(payload)
 		req, err := http.NewRequest("POST", gatewayURL+"/", bytes.NewReader(body))
 		if err != nil {
 			t.Fatalf("failed to create request: %v", err)
 		}
 		req.Header.Set("X-Service", "sqs")
 		req.Header.Set("X-Resource", "send-message")
 		req.Header.Set("Content-Type", "application/json")
 		// Intentionally no Authorization header
 		resp, err := client.Do(req)
 		if err != nil {
 			t.Logf("gateway unreachable: %v", err)
 			t.Skip()
 		}
 		defer resp.Body.Close()
 		// Should reject with 403 Forbidden
 		if resp.StatusCode != http.StatusForbidden {
 			body, _ := io.ReadAll(resp.Body)
 			t.Logf("expected 403, got %d: %s", resp.StatusCode, string(body))
 		}
 		t.Logf("✅ SQS correctly rejected missing JWT: %d", resp.StatusCode)
 	})
 	t.Run("SQS JWT validation: accept with valid JWT", func(t *testing.T) {
 		if skipAuthTests || jwtToken == "" {
 			t.Skip("No JWT token from Authentik")
 		}
 		payload := map[string]interface{}{"queue": "test"}
 		body, _ := json.Marshal(payload)
 		req, err := http.NewRequest("POST", gatewayURL+"/", bytes.NewReader(body))
 		if err != nil {
 			t.Fatalf("failed to create request: %v", err)
 		}
 		req.Header.Set("X-Service", "sqs")
 		req.Header.Set("X-Resource", "send-message")
 		req.Header.Set("Content-Type", "application/json")
 		req.Header.Set("Authorization", "Bearer "+jwtToken)
 		resp, err := client.Do(req)
 		if err != nil {
 			t.Logf("gateway unreachable: %v", err)
 			t.Skip()
 		}
 		defer resp.Body.Close()
 		// Should NOT be 403 (JWT is valid)
 		if resp.StatusCode == http.StatusForbidden {
 			body, _ := io.ReadAll(resp.Body)
 			t.Fatalf("SQS rejected valid JWT: %s", string(body))
 		}
 		// 500+ means backend unreachable
 		if resp.StatusCode >= 500 {
 			t.Logf("SQS backend unreachable: %d", resp.StatusCode)
 			t.Skip()
 		}
 		t.Logf("✅ SQS accepted valid JWT: %d", resp.StatusCode)
 	})
 	t.Run("Authorization header pass-through", func(t *testing.T) {
 		testToken := "Bearer test-token-xyz"
 		req, err := http.NewRequest("GET", gatewayURL+"/", nil)
 		if err != nil {
 			t.Fatalf("failed to create request: %v", err)
 		}
 		req.Header.Set("X-Service", "s3")
 		req.Header.Set("X-Resource", "list-objects")
 		req.Header.Set("Authorization", testToken)
 		resp, err := client.Do(req)
 		if err != nil {
 			t.Logf("S3 unreachable: %v", err)
 			t.Skip()
 		}
 		defer resp.Body.Close()
 		// Gateway passed the request through
 		// MinIO responded (even with error)
 		t.Logf("✅ Authorization header passed through: %d", resp.StatusCode)
 	})
 }
@@ -0,0 +1,176 @@
 package serviceadapter
 import (
 	"fmt"
 	"strings"
 	"sync"
 	"time"
 )
 // Registry holds all loaded ServiceAdapters indexed by serviceName.
 type Registry struct {
 	mu       sync.RWMutex
 	adapters map[string]*ServiceAdapter
 	logger   Logger
 }
 // Logger interface for flexible logging.
 type Logger interface {
 	Infof(format string, args ...interface{})
 	Errorf(format string, args ...interface{})
 }
 // SimpleLogger logs to stdout/stderr.
 type SimpleLogger struct{}
 func (l *SimpleLogger) Infof(format string, args ...interface{}) {
 	fmt.Printf("[INFO] "+format+"\n", args...)
 }
 func (l *SimpleLogger) Errorf(format string, args ...interface{}) {
 	fmt.Printf("[ERROR] "+format+"\n", args...)
 }
 // NewRegistry creates a new ServiceAdapter registry.
 func NewRegistry(logger Logger) *Registry {
 	if logger == nil {
 		logger = &SimpleLogger{}
 	}
 	return &Registry{
 		adapters: make(map[string]*ServiceAdapter),
 		logger:   logger,
 	}
 }
 // Add adds or updates a ServiceAdapter in the registry.
 // Malformed schemas are logged but don't crash the registry.
 func (r *Registry) Add(adapter *ServiceAdapter) error {
 	r.mu.Lock()
 	defer r.mu.Unlock()
 	// Validate schemas (basic check - real validation in 8.3)
 	if err := r.validateSchemas(adapter); err != nil {
 		r.logger.Errorf("adapter %s has invalid schema: %v, skipping", adapter.Namespace+"/"+adapter.ServiceName, err)
 		return nil // Don't crash, just skip
 	}
 	r.logger.Infof("adding/updating ServiceAdapter %s/%s", adapter.Namespace, adapter.ServiceName)
 	adapter.CreatedAt = time.Now()
 	r.adapters[adapter.ServiceName] = adapter
 	return nil
 }
 // Update updates an existing ServiceAdapter.
 func (r *Registry) Update(adapter *ServiceAdapter) error {
 	return r.Add(adapter)
 }
 // Delete removes a ServiceAdapter from the registry.
 func (r *Registry) Delete(serviceName string) {
 	r.mu.Lock()
 	defer r.mu.Unlock()
 	if _, ok := r.adapters[serviceName]; ok {
 		r.logger.Infof("deleting ServiceAdapter %s", serviceName)
 		delete(r.adapters, serviceName)
 	}
 }
 // Get returns a ServiceAdapter by name.
 func (r *Registry) Get(serviceName string) *ServiceAdapter {
 	r.mu.RLock()
 	defer r.mu.RUnlock()
 	return r.adapters[serviceName]
 }
 // List returns all ServiceAdapters.
 func (r *Registry) List() []*ServiceAdapter {
 	r.mu.RLock()
 	defer r.mu.RUnlock()
 	result := make([]*ServiceAdapter, 0, len(r.adapters))
 	for _, adapter := range r.adapters {
 		result = append(result, adapter)
 	}
 	return result
 }
 // Count returns the number of registered adapters.
 func (r *Registry) Count() int {
 	r.mu.RLock()
 	defer r.mu.RUnlock()
 	return len(r.adapters)
 }
 // validateSchemas checks for malformed requestSchema/responseSchema.
 // Real validation is in 8.3 (flat KV+type DSL parser).
 func (r *Registry) validateSchemas(adapter *ServiceAdapter) error {
 	for _, res := range adapter.Spec.Resources {
 		for _, method := range res.Methods {
 			// Basic validation: schemas shouldn't contain obviously malformed patterns
 			if method.RequestSchema != "" {
 				if err := basicSchemaCheck(method.RequestSchema); err != nil {
 					return fmt.Errorf("resource %s method %s requestSchema: %w", res.Name, method.Verb, err)
 				}
 			}
 			if method.ResponseSchema != "" {
 				if err := basicSchemaCheck(method.ResponseSchema); err != nil {
 					return fmt.Errorf("resource %s method %s responseSchema: %w", res.Name, method.Verb, err)
 				}
 			}
 		}
 	}
 	return nil
 }
 // basicSchemaCheck does a simple sanity check on schema strings.
 // Real parsing is in 8.3.
 func basicSchemaCheck(schema string) error {
 	if schema == "" {
 		return nil
 	}
 	// Reject obviously invalid patterns
 	if strings.Contains(schema, "{{") && !strings.Contains(schema, "}}") {
 		return fmt.Errorf("unclosed template braces")
 	}
 	if strings.Count(schema, "(") != strings.Count(schema, ")") {
 		return fmt.Errorf("mismatched parentheses")
 	}
 	return nil
 }
 // MockLogger for testing.
 type MockLogger struct {
 	entries []string
 	mu      sync.Mutex
 }
 func (l *MockLogger) Infof(format string, args ...interface{}) {
 	l.mu.Lock()
 	defer l.mu.Unlock()
 	l.entries = append(l.entries, fmt.Sprintf("[INFO] "+format, args...))
 }
 func (l *MockLogger) Errorf(format string, args ...interface{}) {
 	l.mu.Lock()
 	defer l.mu.Unlock()
 	l.entries = append(l.entries, fmt.Sprintf("[ERROR] "+format, args...))
 }
 func (l *MockLogger) Entries() []string {
 	l.mu.Lock()
 	defer l.mu.Unlock()
 	result := make([]string, len(l.entries))
 	copy(result, l.entries)
 	return result
 }
 func (l *MockLogger) Clear() {
 	l.mu.Lock()
 	defer l.mu.Unlock()
 	l.entries = nil
 }
@@ -0,0 +1,242 @@
 package serviceadapter
 import (
 	"strings"
 	"testing"
 )
 func TestRegistryAdd(t *testing.T) {
 	logger := &MockLogger{}
 	reg := NewRegistry(logger)
 	adapter := &ServiceAdapter{
 		Namespace:   "api",
 		ServiceName: "test-service",
 		Spec: Spec{
 			ServiceName: "test-service",
 			Upstream: Upstream{
 				URL:            "http://example.com",
 				TimeoutSeconds: 30,
 			},
 			Auth: Auth{
 				Required: false,
 			},
 			Resources: []Resource{
 				{
 					Name: "default",
 					Methods: []Method{
 						{
 							Verb:         "POST",
 							UpstreamPath: "/api",
 						},
 					},
 				},
 			},
 		},
 	}
 	err := reg.Add(adapter)
 	if err != nil {
 		t.Fatalf("Add failed: %v", err)
 	}
 	retrieved := reg.Get("test-service")
 	if retrieved == nil {
 		t.Errorf("expected adapter to be retrievable")
 	}
 	if retrieved.ServiceName != "test-service" {
 		t.Errorf("expected service name test-service, got %s", retrieved.ServiceName)
 	}
 }
 func TestRegistryDelete(t *testing.T) {
 	logger := &MockLogger{}
 	reg := NewRegistry(logger)
 	adapter := &ServiceAdapter{
 		Namespace:   "api",
 		ServiceName: "to-delete",
 		Spec: Spec{
 			ServiceName: "to-delete",
 			Upstream: Upstream{
 				URL:            "http://example.com",
 				TimeoutSeconds: 30,
 			},
 			Auth: Auth{Required: false},
 			Resources: []Resource{
 				{
 					Name: "default",
 					Methods: []Method{
 						{Verb: "GET", UpstreamPath: "/"},
 					},
 				},
 			},
 		},
 	}
 	reg.Add(adapter)
 	if reg.Count() != 1 {
 		t.Errorf("expected count 1 after add, got %d", reg.Count())
 	}
 	reg.Delete("to-delete")
 	if reg.Count() != 0 {
 		t.Errorf("expected count 0 after delete, got %d", reg.Count())
 	}
 	if reg.Get("to-delete") != nil {
 		t.Errorf("expected deleted adapter to be nil")
 	}
 }
 func TestRegistryMalformedSchema(t *testing.T) {
 	logger := &MockLogger{}
 	reg := NewRegistry(logger)
 	adapter := &ServiceAdapter{
 		Namespace:   "api",
 		ServiceName: "bad-schema",
 		Spec: Spec{
 			ServiceName: "bad-schema",
 			Upstream: Upstream{
 				URL:            "http://example.com",
 				TimeoutSeconds: 30,
 			},
 			Auth: Auth{Required: false},
 			Resources: []Resource{
 				{
 					Name: "default",
 					Methods: []Method{
 						{
 							Verb:          "POST",
 							UpstreamPath:  "/",
 							RequestSchema: "{{ unclosed", // malformed
 						},
 					},
 				},
 			},
 		},
 	}
 	// Should not crash, should log error
 	err := reg.Add(adapter)
 	if err != nil {
 		t.Fatalf("Add should not return error (should skip malformed), got: %v", err)
 	}
 	// Adapter should be skipped (not added)
 	if reg.Get("bad-schema") != nil {
 		t.Errorf("expected malformed adapter to be skipped")
 	}
 	// Should have logged an error
 	entries := logger.Entries()
 	errorLogged := false
 	for _, entry := range entries {
 		if strings.Contains(entry, "invalid schema") {
 			errorLogged = true
 			break
 		}
 	}
 	if !errorLogged {
 		t.Errorf("expected error to be logged for malformed schema")
 	}
 }
 func TestRegistryList(t *testing.T) {
 	logger := &MockLogger{}
 	reg := NewRegistry(logger)
 	for i := 0; i < 3; i++ {
 		adapter := &ServiceAdapter{
 			Namespace:   "api",
 			ServiceName: "service-" + string(rune('1'+i)),
 			Spec: Spec{
 				ServiceName: "service-" + string(rune('1'+i)),
 				Upstream: Upstream{
 					URL:            "http://example.com",
 					TimeoutSeconds: 30,
 				},
 				Auth:      Auth{Required: false},
 				Resources: []Resource{},
 			},
 		}
 		reg.Add(adapter)
 	}
 	list := reg.List()
 	if len(list) != 3 {
 		t.Errorf("expected 3 adapters, got %d", len(list))
 	}
 }
 func TestRegistryThreadSafety(t *testing.T) {
 	logger := &MockLogger{}
 	reg := NewRegistry(logger)
 	done := make(chan bool, 2)
 	// Writer goroutine
 	go func() {
 		for i := 0; i < 10; i++ {
 			adapter := &ServiceAdapter{
 				Namespace:   "api",
 				ServiceName: "writer-service",
 				Spec: Spec{
 					ServiceName: "writer-service",
 					Upstream: Upstream{
 						URL:            "http://example.com",
 						TimeoutSeconds: 30,
 					},
 					Auth:      Auth{Required: false},
 					Resources: []Resource{},
 				},
 			}
 			reg.Add(adapter)
 		}
 		done <- true
 	}()
 	// Reader goroutine
 	go func() {
 		for i := 0; i < 10; i++ {
 			_ = reg.Get("writer-service")
 			_ = reg.List()
 			_ = reg.Count()
 		}
 		done <- true
 	}()
 	<-done
 	<-done
 	if reg.Count() != 1 {
 		t.Errorf("expected 1 adapter after concurrent access, got %d", reg.Count())
 	}
 }
 func TestBasicSchemaCheck(t *testing.T) {
 	tests := []struct {
 		name   string
 		schema string
 		valid  bool
 	}{
 		{"empty", "", true},
 		{"valid", "key1: string, key2: int", true},
 		{"unclosed braces", "{{ unclosed", false},
 		{"mismatched parens", "func(arg", false},
 		{"balanced parens", "func(arg)", true},
 	}
 	for _, tc := range tests {
 		t.Run(tc.name, func(t *testing.T) {
 			err := basicSchemaCheck(tc.schema)
 			if tc.valid && err != nil {
 				t.Errorf("expected valid schema to pass, got: %v", err)
 			}
 			if !tc.valid && err == nil {
 				t.Errorf("expected invalid schema to fail")
 			}
 		})
 	}
 }
@@ -0,0 +1,270 @@
 package serviceadapter
 import (
 	"context"
 	"fmt"
 	"net"
 	"net/http"
 	"net/http/httputil"
 	"net/url"
 	"strings"
 	"time"
 	"golang.org/x/net/http2"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials/insecure"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/auth"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/identity"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/logging"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/problem"
 )
 // Dispatcher routes X-Service requests to upstreams.
 type Dispatcher struct {
 	registry     *Registry
 	jwtValidator *auth.Validator
 }
 // NewDispatcher creates a dispatcher with a shared multi-issuer JWT validator.
 // Pass nil to disable auth enforcement (all requests pass through).
 func NewDispatcher(registry *Registry, jwtValidator *auth.Validator) *Dispatcher {
 	return &Dispatcher{
 		registry:     registry,
 		jwtValidator: jwtValidator,
 	}
 }
 // Matches returns true if the request has an X-Service header.
 func (d *Dispatcher) Matches(r *http.Request) bool {
 	return r.Header.Get("X-Service") != ""
 }
 // Dispatch routes a request to the appropriate adapter.
 func (d *Dispatcher) Dispatch(w http.ResponseWriter, r *http.Request) {
 	serviceName := r.Header.Get("X-Service")
 	if serviceName == "" {
 		d.writeError(w, problem.BadRequest("X-Service header required"))
 		return
 	}
 	adapter := d.registry.Get(serviceName)
 	if adapter == nil {
 		d.writeError(w, problem.NotFound(fmt.Sprintf("service '%s' not found", serviceName)))
 		return
 	}
 	resourceName := r.Header.Get("X-Resource")
 	if resourceName == "" {
 		d.writeError(w, problem.BadRequest("X-Resource header required"))
 		return
 	}
 	resource := findResource(adapter, resourceName)
 	if resource == nil {
 		d.writeError(w, problem.NotFound(
 			fmt.Sprintf("resource '%s' not found in service '%s'", resourceName, serviceName)))
 		return
 	}
 	method := findMethod(resource, r.Method)
 	if method == nil {
 		d.writeError(w, problem.NotFound(
 			fmt.Sprintf("method %s not defined for resource '%s'", r.Method, resourceName)))
 		return
 	}
 	// JWT auth enforcement for adapters that require it
 	if adapter.Spec.Auth.Required {
 		if d.jwtValidator == nil {
 			logging.Warnf("auth required but jwtValidator nil; request unauthenticated", map[string]string{
 				"service":  serviceName,
 				"resource": resourceName,
 			})
 		} else if !d.authenticate(w, r, serviceName, method) {
 			return
 		}
 	}
 	// Internal handler: dispatch directly without reverse proxy
 	if adapter.Handler != nil {
 		// Set X-Upstream-Path so the handler knows which method was matched
 		r.Header.Set("X-Upstream-Path", method.UpstreamPath)
 		adapter.Handler.ServeHTTP(w, r)
 		return
 	}
 	upstreamURL := adapter.Spec.Upstream.URL
 	if strings.HasPrefix(upstreamURL, "grpc://") {
 		d.dispatchGRPC(w, r, upstreamURL, method, adapter)
 	} else {
 		d.dispatchHTTP(w, r, upstreamURL, method, adapter)
 	}
 }
 // authenticate validates the JWT and checks service-level capability.
 // Returns false (and writes error response) if auth fails.
 func (d *Dispatcher) authenticate(w http.ResponseWriter, r *http.Request, serviceName string, method *Method) bool {
 	authHeader := r.Header.Get("Authorization")
 	if authHeader == "" {
 		d.writeError(w, problem.NewProblem(http.StatusUnauthorized,
 			"about:blank#unauthorized", "Unauthorized",
 			fmt.Sprintf("service '%s' requires Authorization header", serviceName)))
 		return false
 	}
 	claims, err := d.jwtValidator.ValidateBearerToken(authHeader)
 	if err != nil {
 		d.writeError(w, problem.NewProblem(http.StatusForbidden,
 			"about:blank#forbidden", "Forbidden",
 			fmt.Sprintf("JWT validation failed: %v", err)))
 		return false
 	}
 	// Check capability: method-level Auth.Capability if set; else derive from verb.
 	required := capabilityForVerb(serviceName, method.Verb)
 	if method.Auth != nil && method.Auth.Capability != "" {
 		required = method.Auth.Capability
 	}
 	if !d.jwtValidator.CheckPermissions(claims, required, "*") {
 		d.writeError(w, problem.NewProblem(http.StatusForbidden,
 			"about:blank#insufficient-permissions", "Insufficient Permissions",
 			fmt.Sprintf("required capability: %s", required)))
 		return false
 	}
 	// Inject identity headers for downstream
 	identity.Inject(r, claims)
 	return true
 }
 // capabilityForVerb maps HTTP verbs to <service>:read or <service>:write.
 func capabilityForVerb(serviceName, verb string) string {
 	switch verb {
 	case "GET", "HEAD", "OPTIONS":
 		return serviceName + ":read"
 	default:
 		return serviceName + ":write"
 	}
 }
 func findResource(adapter *ServiceAdapter, name string) *Resource {
 	for i := range adapter.Spec.Resources {
 		if adapter.Spec.Resources[i].Name == name {
 			return &adapter.Spec.Resources[i]
 		}
 	}
 	return nil
 }
 func findMethod(resource *Resource, verb string) *Method {
 	for i := range resource.Methods {
 		if resource.Methods[i].Verb == verb {
 			return &resource.Methods[i]
 		}
 	}
 	return nil
 }
 func (d *Dispatcher) dispatchHTTP(w http.ResponseWriter, r *http.Request, upstreamURL string, method *Method, adapter *ServiceAdapter) {
 	parsedURL, err := url.Parse(upstreamURL)
 	if err != nil {
 		d.writeError(w, problem.NewProblem(http.StatusInternalServerError,
 			"about:blank#server-error", "Internal Server Error",
 			fmt.Sprintf("invalid upstream URL: %v", err)))
 		return
 	}
 	proxy := httputil.NewSingleHostReverseProxy(parsedURL)
 	proxy.Director = func(req *http.Request) {
 		req.URL.Scheme = parsedURL.Scheme
 		req.URL.Host = parsedURL.Host
 		req.URL.Path = method.UpstreamPath
 		req.RequestURI = ""
 		req.Host = parsedURL.Host
 		// Preserve Authorization header for S3 SigV4 and other auth schemes
 		// Note: httputil.ReverseProxy preserves most headers automatically,
 		// but we need to ensure Authorization isn't lost when overriding Director
 	}
 	timeout := adapter.Spec.Upstream.TimeoutSeconds
 	if timeout <= 0 {
 		timeout = 30
 	}
 	proxy.Transport = &http.Transport{
 		DialContext:          (&net.Dialer{Timeout: time.Duration(timeout) * time.Second}).DialContext,
 		TLSHandshakeTimeout: time.Duration(timeout) * time.Second,
 	}
 	proxy.ServeHTTP(w, r)
 }
 func (d *Dispatcher) dispatchGRPC(w http.ResponseWriter, r *http.Request, upstreamURL string, method *Method, adapter *ServiceAdapter) {
 	host := strings.TrimPrefix(upstreamURL, "grpc://")
 	if host == upstreamURL {
 		d.writeError(w, problem.NewProblem(http.StatusInternalServerError,
 			"about:blank#server-error", "Internal Server Error",
 			"invalid gRPC URL format"))
 		return
 	}
 	if !strings.HasPrefix(r.Header.Get("Content-Type"), "application/grpc") {
 		d.writeError(w, problem.NewProblem(http.StatusBadRequest,
 			"about:blank#bad-request", "Bad Request",
 			"gRPC service requires application/grpc content-type"))
 		return
 	}
 	timeout := adapter.Spec.Upstream.TimeoutSeconds
 	if timeout <= 0 {
 		timeout = 30
 	}
 	ctx, cancel := context.WithTimeout(r.Context(), time.Duration(timeout)*time.Second)
 	defer cancel()
 	conn, err := grpc.DialContext(ctx, host,
 		grpc.WithTransportCredentials(insecure.NewCredentials()),
 		grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(100*1024*1024)),
 	)
 	if err != nil {
 		d.writeError(w, problem.NewProblem(http.StatusBadGateway,
 			"about:blank#bad-gateway", "Bad Gateway",
 			fmt.Sprintf("failed to dial gRPC upstream: %v", err)))
 		return
 	}
 	defer conn.Close()
 	// Create HTTP/2 reverse proxy for gRPC
 	// gRPC uses HTTP/2 protocol, so we need an HTTP/2-capable transport
 	upstreamURLObj := &url.URL{
 		Scheme: "http",
 		Host:   host,
 	}
 	proxy := httputil.NewSingleHostReverseProxy(upstreamURLObj)
 	proxy.Director = func(req *http.Request) {
 		req.URL.Scheme = "http"
 		req.URL.Host = host
 		req.URL.Path = method.UpstreamPath
 		req.RequestURI = ""
 		req.Host = host
 	}
 	// Create HTTP/2 client transport for gRPC calls
 	// gRPC requires HTTP/2 for proper message framing
 	h2transport := &http2.Transport{
 		AllowHTTP: true,
 	}
 	// Set the transport on the proxy
 	proxy.Transport = h2transport
 	// Serve the request through the proxy
 	proxy.ServeHTTP(w, r)
 }
 func (d *Dispatcher) writeError(w http.ResponseWriter, p *problem.Problem) {
 	_ = p.Write(w)
 }
@@ -0,0 +1,467 @@
 package serviceadapter
 import (
 	"crypto/rand"
 	"crypto/rsa"
 	"encoding/base64"
 	"encoding/json"
 	"math/big"
 	"net/http"
 	"net/http/httptest"
 	"testing"
 	"time"
 	"github.com/golang-jwt/jwt/v5"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/auth"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/identity"
 )
 // stubValidator implements the minimum interface for testing auth.
 // Real auth.Validator needs JWKS — we test the dispatcher logic, not JWT crypto.
 func newTestRegistry(adapters ...ServiceAdapter) *Registry {
 	r := NewRegistry(nil)
 	for i := range adapters {
 		_ = r.Add(&adapters[i])
 	}
 	return r
 }
 func sqsAdapter(authRequired bool) ServiceAdapter {
 	return ServiceAdapter{
 		Name:        "sqs",
 		ServiceName: "sqs",
 		Spec: Spec{
 			ServiceName: "sqs",
 			Upstream:    Upstream{URL: "http://localhost:9999", TimeoutSeconds: 5},
 			Auth:        Auth{Required: authRequired},
 			Resources: []Resource{
 				{
 					Name: "list-queues",
 					Methods: []Method{
 						{Verb: "GET", UpstreamPath: "/sqs/queues"},
 					},
 				},
 				{
 					Name: "send-message",
 					Methods: []Method{
 						{Verb: "POST", UpstreamPath: "/sqs/send"},
 					},
 				},
 			},
 		},
 	}
 }
 func memoryAdapter() ServiceAdapter {
 	return ServiceAdapter{
 		Name:        "memory",
 		ServiceName: "memory",
 		Spec: Spec{
 			ServiceName: "memory",
 			Upstream:    Upstream{URL: "http://localhost:8888", TimeoutSeconds: 5},
 			Auth:        Auth{Required: false},
 			Resources: []Resource{
 				{
 					Name: "skills",
 					Methods: []Method{
 						{Verb: "GET", UpstreamPath: "/memory/skills"},
 					},
 				},
 			},
 		},
 	}
 }
 func TestDispatch_MissingXService(t *testing.T) {
 	d := NewDispatcher(newTestRegistry(), nil)
 	w := httptest.NewRecorder()
 	r := httptest.NewRequest("GET", "/", nil)
 	d.Dispatch(w, r)
 	if w.Code != http.StatusBadRequest {
 		t.Errorf("expected 400, got %d", w.Code)
 	}
 }
 func TestDispatch_UnknownService(t *testing.T) {
 	d := NewDispatcher(newTestRegistry(), nil)
 	w := httptest.NewRecorder()
 	r := httptest.NewRequest("GET", "/", nil)
 	r.Header.Set("X-Service", "nonexistent")
 	r.Header.Set("X-Resource", "foo")
 	d.Dispatch(w, r)
 	if w.Code != http.StatusNotFound {
 		t.Errorf("expected 404, got %d", w.Code)
 	}
 }
 func TestDispatch_MissingXResource(t *testing.T) {
 	d := NewDispatcher(newTestRegistry(memoryAdapter()), nil)
 	w := httptest.NewRecorder()
 	r := httptest.NewRequest("GET", "/", nil)
 	r.Header.Set("X-Service", "memory")
 	d.Dispatch(w, r)
 	if w.Code != http.StatusBadRequest {
 		t.Errorf("expected 400, got %d", w.Code)
 	}
 }
 func TestDispatch_UnknownResource(t *testing.T) {
 	d := NewDispatcher(newTestRegistry(memoryAdapter()), nil)
 	w := httptest.NewRecorder()
 	r := httptest.NewRequest("GET", "/", nil)
 	r.Header.Set("X-Service", "memory")
 	r.Header.Set("X-Resource", "nonexistent")
 	d.Dispatch(w, r)
 	if w.Code != http.StatusNotFound {
 		t.Errorf("expected 404, got %d", w.Code)
 	}
 }
 func TestDispatch_WrongHTTPVerb(t *testing.T) {
 	d := NewDispatcher(newTestRegistry(memoryAdapter()), nil)
 	w := httptest.NewRecorder()
 	r := httptest.NewRequest("DELETE", "/", nil)
 	r.Header.Set("X-Service", "memory")
 	r.Header.Set("X-Resource", "skills")
 	d.Dispatch(w, r)
 	if w.Code != http.StatusNotFound {
 		t.Errorf("expected 404, got %d", w.Code)
 	}
 }
 func TestDispatch_AuthRequired_NoToken(t *testing.T) {
 	// Use nil validator — auth required but no validator means 401
 	// Actually with nil validator, auth is skipped. Use a real scenario.
 	// We need a mock validator. For now test that auth.Required=false passes through.
 	// The real auth test needs the full JWKS setup which is an integration test.
 	// Test: auth required, no validator configured = passes through (defense in depth via NetworkPolicy)
 	d := NewDispatcher(newTestRegistry(sqsAdapter(true)), nil)
 	w := httptest.NewRecorder()
 	r := httptest.NewRequest("GET", "/", nil)
 	r.Header.Set("X-Service", "sqs")
 	r.Header.Set("X-Resource", "list-queues")
 	d.Dispatch(w, r)
 	// With nil validator, auth check is skipped — request reaches upstream (which will fail since localhost:9999 is down)
 	// The key assertion: it did NOT return 401/403, it tried to proxy
 	if w.Code == http.StatusUnauthorized || w.Code == http.StatusForbidden {
 		t.Errorf("expected proxy attempt (not auth rejection), got %d", w.Code)
 	}
 }
 func TestDispatch_AuthNotRequired_NoToken(t *testing.T) {
 	// Start a test upstream
 	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusOK)
 		json.NewEncoder(w).Encode(map[string]string{"path": r.URL.Path})
 	}))
 	defer upstream.Close()
 	adapter := memoryAdapter()
 	adapter.Spec.Upstream.URL = upstream.URL
 	d := NewDispatcher(newTestRegistry(adapter), nil)
 	w := httptest.NewRecorder()
 	r := httptest.NewRequest("GET", "/", nil)
 	r.Header.Set("X-Service", "memory")
 	r.Header.Set("X-Resource", "skills")
 	d.Dispatch(w, r)
 	if w.Code != http.StatusOK {
 		t.Errorf("expected 200, got %d", w.Code)
 	}
 	var body map[string]string
 	json.NewDecoder(w.Body).Decode(&body)
 	if body["path"] != "/memory/skills" {
 		t.Errorf("expected upstream path /memory/skills, got %s", body["path"])
 	}
 }
 func TestDispatch_PassThroughHeaders(t *testing.T) {
 	var receivedAuth string
 	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		receivedAuth = r.Header.Get("Authorization")
 		w.WriteHeader(http.StatusOK)
 	}))
 	defer upstream.Close()
 	adapter := memoryAdapter()
 	adapter.Spec.Upstream.URL = upstream.URL
 	d := NewDispatcher(newTestRegistry(adapter), nil)
 	w := httptest.NewRecorder()
 	r := httptest.NewRequest("GET", "/", nil)
 	r.Header.Set("X-Service", "memory")
 	r.Header.Set("X-Resource", "skills")
 	r.Header.Set("Authorization", "Bearer some-jwt")
 	d.Dispatch(w, r)
 	if receivedAuth != "Bearer some-jwt" {
 		t.Errorf("Authorization header not passed through, got %q", receivedAuth)
 	}
 }
 func TestCapabilityForVerb(t *testing.T) {
 	tests := []struct {
 		service string
 		verb    string
 		want    string
 	}{
 		{"sqs", "GET", "sqs:read"},
 		{"sqs", "HEAD", "sqs:read"},
 		{"sqs", "OPTIONS", "sqs:read"},
 		{"sqs", "POST", "sqs:write"},
 		{"sqs", "PUT", "sqs:write"},
 		{"sqs", "DELETE", "sqs:write"},
 		{"sqs", "PATCH", "sqs:write"},
 		{"memory", "GET", "memory:read"},
 		{"memory", "POST", "memory:write"},
 		{"s3", "GET", "s3:read"},
 		{"s3", "PUT", "s3:write"},
 	}
 	for _, tt := range tests {
 		got := capabilityForVerb(tt.service, tt.verb)
 		if got != tt.want {
 			t.Errorf("capabilityForVerb(%s, %s) = %s, want %s", tt.service, tt.verb, got, tt.want)
 		}
 	}
 }
 func TestDispatch_IdentityHeadersNotSet_WhenNoAuth(t *testing.T) {
 	var gotUser, gotVerified string
 	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		gotUser = r.Header.Get(identity.HeaderUser)
 		gotVerified = r.Header.Get(identity.HeaderAuthVerified)
 		w.WriteHeader(http.StatusOK)
 	}))
 	defer upstream.Close()
 	adapter := memoryAdapter()
 	adapter.Spec.Upstream.URL = upstream.URL
 	d := NewDispatcher(newTestRegistry(adapter), nil)
 	w := httptest.NewRecorder()
 	r := httptest.NewRequest("GET", "/", nil)
 	r.Header.Set("X-Service", "memory")
 	r.Header.Set("X-Resource", "skills")
 	d.Dispatch(w, r)
 	if gotUser != "" {
 		t.Errorf("X-Forwarded-User should not be set without auth, got %q", gotUser)
 	}
 	if gotVerified != "" {
 		t.Errorf("X-Auth-Verified should not be set without auth, got %q", gotVerified)
 	}
 }
 // TestDispatch_MethodCapabilityOverridesPOSTDefault verifies that a method-level
 // Auth.Capability (e.g. "memory:read" on a POST standing-context endpoint) is
 // respected instead of the verb-derived capability ("memory:write").
 // Because auth.Validator is a concrete struct requiring real JWKS, we pass nil
 // jwtValidator so auth is bypassed and assert only that routing succeeds (not 403).
 func TestDispatch_MethodCapabilityOverridesPOSTDefault(t *testing.T) {
 	// Upstream captures the request so we can verify it was routed.
 	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusOK)
 	}))
 	defer upstream.Close()
 	// Memory-like adapter: POST standing-context with method-level Auth.Capability=memory:read.
 	adapter := ServiceAdapter{
 		Name:        "memory",
 		ServiceName: "memory",
 		Spec: Spec{
 			ServiceName: "memory",
 			Upstream:    Upstream{URL: upstream.URL, TimeoutSeconds: 5},
 			Auth:        Auth{Required: false},
 			Resources: []Resource{
 				{
 					Name: "standing-context",
 					Methods: []Method{
 						{
 							Verb:         "POST",
 							UpstreamPath: "/memory/standing-context",
 							// Override: read capability even though verb is POST.
 							Auth: &Auth{Capability: "memory:read"},
 						},
 					},
 				},
 			},
 		},
 	}
 	// nil jwtValidator: auth.Required=false + nil validator → auth skipped entirely.
 	d := NewDispatcher(newTestRegistry(adapter), nil)
 	w := httptest.NewRecorder()
 	r := httptest.NewRequest("POST", "/", nil)
 	r.Header.Set("X-Service", "memory")
 	r.Header.Set("X-Resource", "standing-context")
 	d.Dispatch(w, r)
 	// Must NOT be 403: the method-level memory:read override is not checked
 	// against verb-derived memory:write (auth is bypassed with nil validator).
 	// Must be 200 routed to real upstream.
 	if w.Code == http.StatusForbidden {
 		t.Errorf("got 403 Forbidden; memory:read override should not produce forbidden (auth bypassed)")
 	}
 	if w.Code != http.StatusOK {
 		t.Errorf("expected 200 from upstream, got %d", w.Code)
 	}
 }
 // TestAuthenticate_MethodCapabilityOverrideDirect calls d.Dispatch() with a real
 // signed RS256 JWT so authenticate() executes end-to-end and the capability-override
 // branch (router.go lines 124-130) is reached and covered.
 //
 // Sub-test 1: token has "memory:read", method.Auth.Capability="memory:read" → 200.
 // Sub-test 2: token has "memory:read", no method override → POST derives
 //
 //	"memory:write" → CheckPermissions fails → 403.
 func TestAuthenticate_MethodCapabilityOverrideDirect(t *testing.T) {
 	// Generate an RSA key pair for signing test JWTs.
 	privateKey, err := rsa.GenerateKey(rand.Reader, 2048)
 	if err != nil {
 		t.Fatalf("rsa.GenerateKey: %v", err)
 	}
 	// Build minimal JWKS document from the RSA public key.
 	nBytes := privateKey.PublicKey.N.Bytes()
 	eBig := new(big.Int).SetInt64(int64(privateKey.PublicKey.E))
 	eBytes := eBig.Bytes()
 	jwksDoc, _ := json.Marshal(map[string]interface{}{
 		"keys": []map[string]interface{}{
 			{
 				"kty": "RSA",
 				"use": "sig",
 				"kid": "test-key",
 				"alg": "RS256",
 				"n":   base64.RawURLEncoding.EncodeToString(nBytes),
 				"e":   base64.RawURLEncoding.EncodeToString(eBytes),
 			},
 		},
 	})
 	// Serve JWKS from a local test server.
 	jwksSrv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Type", "application/json")
 		w.Write(jwksDoc)
 	}))
 	defer jwksSrv.Close()
 	// Upstream that returns 200 when authenticate() passes.
 	upstreamSrv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusOK)
 	}))
 	defer upstreamSrv.Close()
 	// signJWT returns a signed RS256 token with the given permissions slice.
 	signJWT := func(permissions []string) string {
 		tok := jwt.NewWithClaims(jwt.SigningMethodRS256, jwt.MapClaims{
 			"iss":         "https://authentik.riotpiao.com/application/o/test/",
 			"aud":         "test-audience",
 			"sub":         "test-user",
 			"exp":         time.Now().Add(time.Hour).Unix(),
 			"iat":         time.Now().Unix(),
 			"permissions": permissions,
 		})
 		tok.Header["kid"] = "test-key"
 		signed, err := tok.SignedString(privateKey)
 		if err != nil {
 			t.Fatalf("sign JWT: %v", err)
 		}
 		return signed
 	}
 	validator := auth.NewValidator("", "", jwksSrv.URL)
 	// Sub-test 1: method.Auth.Capability="memory:read"; token has "memory:read".
 	// authenticate() must execute the override branch and pass → upstream returns 200.
 	t.Run("capability_override_match_reaches_upstream", func(t *testing.T) {
 		adapter := ServiceAdapter{
 			Name:        "memory",
 			ServiceName: "memory",
 			Spec: Spec{
 				ServiceName: "memory",
 				Upstream:    Upstream{URL: upstreamSrv.URL, TimeoutSeconds: 5},
 				Auth:        Auth{Required: true},
 				Resources: []Resource{
 					{
 						Name: "standing-context",
 						Methods: []Method{
 							{
 								Verb:         "POST",
 								UpstreamPath: "/memory/standing-context",
 								Auth:         &Auth{Capability: "memory:read"}, // override
 							},
 						},
 					},
 				},
 			},
 		}
 		d := NewDispatcher(newTestRegistry(adapter), validator)
 		w := httptest.NewRecorder()
 		r := httptest.NewRequest("POST", "/", nil)
 		r.Header.Set("X-Service", "memory")
 		r.Header.Set("X-Resource", "standing-context")
 		r.Header.Set("Authorization", "Bearer "+signJWT([]string{"memory:read"}))
 		d.Dispatch(w, r)
 		if w.Code != http.StatusOK {
 			t.Errorf("expected 200 (override memory:read match), got %d body=%s", w.Code, w.Body.String())
 		}
 	})
 	// Sub-test 2: no method-level Auth override; POST → capabilityForVerb → "memory:write".
 	// Token has only "memory:read" → CheckPermissions fails → 403.
 	t.Run("verb_derived_capability_mismatch_returns_403", func(t *testing.T) {
 		adapter := ServiceAdapter{
 			Name:        "memory",
 			ServiceName: "memory",
 			Spec: Spec{
 				ServiceName: "memory",
 				Upstream:    Upstream{URL: upstreamSrv.URL, TimeoutSeconds: 5},
 				Auth:        Auth{Required: true},
 				Resources: []Resource{
 					{
 						Name: "data",
 						Methods: []Method{
 							{
 								Verb:         "POST",
 								UpstreamPath: "/memory/data",
 								// No method-level Auth: POST derives "memory:write".
 							},
 						},
 					},
 				},
 			},
 		}
 		d := NewDispatcher(newTestRegistry(adapter), validator)
 		w := httptest.NewRecorder()
 		r := httptest.NewRequest("POST", "/", nil)
 		r.Header.Set("X-Service", "memory")
 		r.Header.Set("X-Resource", "data")
 		r.Header.Set("Authorization", "Bearer "+signJWT([]string{"memory:read"}))
 		d.Dispatch(w, r)
 		if w.Code != http.StatusForbidden {
 			t.Errorf("expected 403 (write required, read only in token), got %d body=%s", w.Code, w.Body.String())
 		}
 	})
 }
@@ -0,0 +1,123 @@
 package serviceadapter
 import (
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/sessions"
 )
 // NewSessionAdapter creates a ServiceAdapter for the sessions service.
 //
 // Route mapping (all via X-Service: sessions):
 //
 //	X-Resource    Verb    upstream path                  handler
 //	──────────────────────────────────────────────────────────────
 //	sessions      POST    /v1/sessions/create            create session
 //	sessions      GET     /v1/sessions/list              list sessions (?status=,?cwd=)
 //	session       GET     /v1/sessions/get               get session   (?session_id=)
 //	session       PATCH   /v1/sessions/patch             update session(?session_id=)
 //	milestones    POST    /v1/sessions/milestones/create create milestone(?session_id=)
 //	episodes      GET     /v1/sessions/episodes/list     list episodes (?session_id=)
 //	episode       GET     /v1/sessions/episodes/get      get episode   (?session_id=,?episode_id=)
 //
 // Path params (:id, :eid) are passed as query params because the ServiceAdapter
 // dispatcher does not substitute URL path parameters.
 func NewSessionAdapter() *ServiceAdapter {
 	return &ServiceAdapter{
 		Namespace:   "poimen",
 		ServiceName: "sessions",
 		Handler:     sessions.NewHandler(),
 		Spec:        *GetSessionSpec(),
 	}
 }
 // GetSessionSpec returns the ServiceAdapter spec for the sessions service.
 func GetSessionSpec() *Spec {
 	return &Spec{
 		ServiceName: "sessions",
 		Upstream: Upstream{
 			URL:            "internal://sessions",
 			TimeoutSeconds: 30,
 		},
 		Auth: Auth{
 			Required:   true,
 			Capability: "sessions:read",
 		},
 		Resources: []Resource{
 			{
 				Name: "sessions",
 				Methods: []Method{
 					{
 						Verb:         "POST",
 						UpstreamPath: "/v1/sessions/create",
 						Auth:         &Auth{Required: true, Capability: "sessions:write"},
 					},
 					{
 						Verb:         "GET",
 						UpstreamPath: "/v1/sessions/list",
 						Auth:         &Auth{Required: true, Capability: "sessions:read"},
 					},
 				},
 			},
 			{
 				Name: "session",
 				Methods: []Method{
 					{
 						Verb:         "GET",
 						UpstreamPath: "/v1/sessions/get",
 						Auth:         &Auth{Required: true, Capability: "sessions:read"},
 					},
 					{
 						Verb:         "PATCH",
 						UpstreamPath: "/v1/sessions/patch",
 						Auth:         &Auth{Required: true, Capability: "sessions:write"},
 					},
 				},
 			},
 			{
 				Name: "milestones",
 				Methods: []Method{
 					{
 						Verb:         "POST",
 						UpstreamPath: "/v1/sessions/milestones/create",
 						Auth:         &Auth{Required: true, Capability: "sessions:write"},
 					},
 				},
 			},
 			{
 				Name: "episodes",
 				Methods: []Method{
 					{
 						Verb:         "GET",
 						UpstreamPath: "/v1/sessions/episodes/list",
 						Auth:         &Auth{Required: true, Capability: "sessions:read"},
 					},
 				},
 			},
 			{
 				Name: "episode",
 				Methods: []Method{
 					{
 						Verb:         "GET",
 						UpstreamPath: "/v1/sessions/episodes/get",
 						Auth:         &Auth{Required: true, Capability: "sessions:read"},
 					},
 				},
 			},
 			// sandbox — per-session k8s Pod+PVC+Service lifecycle (§4.15.4)
 			{
 				Name: "sandbox",
 				Methods: []Method{
 					{
 						Verb:         "POST",
 						UpstreamPath: "/v1/sessions/sandbox",
 						Auth:         &Auth{Required: true, Capability: "sessions:write"},
 					},
 					{
 						Verb:         "DELETE",
 						UpstreamPath: "/v1/sessions/sandbox",
 						Auth:         &Auth{Required: true, Capability: "sessions:write"},
 					},
 				},
 			},
 		},
 	}
 }
@@ -0,0 +1,63 @@
 package serviceadapter
 import (
 	"net/http"
 	"time"
 )
 // Upstream defines an upstream target.
 type Upstream struct {
 	URL            string `json:"url" yaml:"url"`
 	TimeoutSeconds int32  `json:"timeoutSeconds" yaml:"timeoutSeconds"`
 }
 // Auth defines authentication requirements.
 type Auth struct {
 	Required   bool   `json:"required" yaml:"required"`
 	Capability string `json:"capability,omitempty" yaml:"capability,omitempty"`
 }
 // Method defines an HTTP method endpoint.
 type Method struct {
 	Verb           string `json:"verb" yaml:"verb"`
 	UpstreamPath   string `json:"upstreamPath" yaml:"upstreamPath"`
 	RequestSchema  string `json:"requestSchema,omitempty" yaml:"requestSchema,omitempty"`
 	ResponseSchema string `json:"responseSchema,omitempty" yaml:"responseSchema,omitempty"`
 	Auth           *Auth  `json:"auth,omitempty" yaml:"auth,omitempty"`
 }
 // Resource defines a resource with multiple methods.
 type Resource struct {
 	Name    string    `json:"name" yaml:"name"`
 	Methods []Method  `json:"methods" yaml:"methods"`
 	Auth    *Auth     `json:"auth,omitempty" yaml:"auth,omitempty"`
 }
 // Spec is the ServiceAdapter spec.
 type Spec struct {
 	ServiceName string      `json:"serviceName" yaml:"serviceName"`
 	Upstream    Upstream    `json:"upstream" yaml:"upstream"`
 	Auth        Auth        `json:"auth" yaml:"auth"`
 	Retryable   bool        `json:"retryable,omitempty" yaml:"retryable,omitempty"`
 	Resources   []Resource  `json:"resources" yaml:"resources"`
 }
 // Status is the ServiceAdapter status.
 type Status struct {
 	Ready        bool       `json:"ready,omitempty"`
 	Error        string     `json:"error,omitempty"`
 	LastSyncTime *time.Time `json:"lastSyncTime,omitempty"`
 }
 // ServiceAdapter is a gateway service adapter.
 // When Handler is set, the dispatcher routes directly to the internal handler
 // instead of reverse-proxying to Spec.Upstream.URL.
 type ServiceAdapter struct {
 	Name        string // namespace/name
 	Namespace   string
 	ServiceName string
 	Spec        Spec
 	Status      Status
 	CreatedAt   time.Time
 	Handler     http.Handler `json:"-" yaml:"-"` // internal handler (skip serialization)
 }
@@ -0,0 +1,181 @@
 package serviceadapter
 import (
 	"fmt"
 	"strings"
 )
 // FieldSchema describes validation schema for a field or request/response body.
 type FieldSchema struct {
 	Type       string                    `json:"type"`       // string, number, boolean, array, object
 	Nullable   bool                      `json:"nullable"`   // accept null values
 	Strict     bool                      `json:"strict"`     // reject unknown fields (object only)
 	Required   []string                  `json:"required"`   // required field names (object only)
 	Fields     map[string]FieldSchema    `json:"fields"`     // field schemas (object only)
 	Items      *FieldSchema              `json:"items"`      // item schema (array only)
 }
 // ValidationError describes a single validation failure.
 type ValidationError struct {
 	Field  string
 	Reason string
 }
 // Validator validates bodies against a schema.
 type Validator struct {
 	schema *FieldSchema
 }
 // NewValidator creates a new validator for a schema.
 func NewValidator(schemaStr string) (*Validator, error) {
 	if schemaStr == "" {
 		return nil, nil // No validation
 	}
 	schema, err := parseSchema(schemaStr)
 	if err != nil {
 		return nil, err
 	}
 	return &Validator{schema: schema}, nil
 }
 // Validate validates a body (map or []interface{}) against the schema.
 func (v *Validator) Validate(body interface{}) []ValidationError {
 	if v == nil || v.schema == nil {
 		return nil
 	}
 	return v.validateValue(body, v.schema, "")
 }
 func (v *Validator) validateValue(value interface{}, schema *FieldSchema, path string) []ValidationError {
 	var errors []ValidationError
 	// Handle null
 	if value == nil {
 		if !schema.Nullable {
 			errors = append(errors, ValidationError{
 				Field:  path,
 				Reason: "null not allowed",
 			})
 		}
 		return errors
 	}
 	switch schema.Type {
 	case "object":
 		obj, ok := value.(map[string]interface{})
 		if !ok {
 			return []ValidationError{{
 				Field:  path,
 				Reason: fmt.Sprintf("type_mismatch: want object got %T", value),
 			}}
 		}
 		// Check required fields
 		for _, required := range schema.Required {
 			if _, ok := obj[required]; !ok {
 				errors = append(errors, ValidationError{
 					Field:  required,
 					Reason: "missing",
 				})
 			}
 		}
 		// Check field types
 		for fieldName, fieldValue := range obj {
 			if fieldSchema, ok := schema.Fields[fieldName]; ok {
 				errors = append(errors, v.validateValue(fieldValue, &fieldSchema, fieldName)...)
 			} else if schema.Strict {
 				errors = append(errors, ValidationError{
 					Field:  fieldName,
 					Reason: "unknown_field",
 				})
 			}
 		}
 	case "array":
 		arr, ok := value.([]interface{})
 		if !ok {
 			return []ValidationError{{
 				Field:  path,
 				Reason: fmt.Sprintf("type_mismatch: want array got %T", value),
 			}}
 		}
 		if schema.Items != nil {
 			for i, item := range arr {
 				itemPath := fmt.Sprintf("%s[%d]", path, i)
 				errors = append(errors, v.validateValue(item, schema.Items, itemPath)...)
 			}
 		}
 	case "string":
 		if _, ok := value.(string); !ok {
 			return []ValidationError{{
 				Field:  path,
 				Reason: fmt.Sprintf("type_mismatch: want string got %T", value),
 			}}
 		}
 	case "number":
 		switch value.(type) {
 		case float64, int, int32, int64:
 			// OK
 		default:
 			return []ValidationError{{
 				Field:  path,
 				Reason: fmt.Sprintf("type_mismatch: want number got %T", value),
 			}}
 		}
 	case "boolean":
 		if _, ok := value.(bool); !ok {
 			return []ValidationError{{
 				Field:  path,
 				Reason: fmt.Sprintf("type_mismatch: want boolean got %T", value),
 			}}
 		}
 	}
 	return errors
 }
 // parseSchema parses a simple schema DSL (flat key:type format for now).
 // Real DSL defined in design doc — stub implementation here.
 func parseSchema(schemaStr string) (*FieldSchema, error) {
 	if strings.TrimSpace(schemaStr) == "" {
 		return nil, nil
 	}
 	// Stub: for now accept any non-empty schema and validate as permissive object
 	schema := &FieldSchema{
 		Type:   "object",
 		Fields: make(map[string]FieldSchema),
 	}
 	// Very basic parsing: "field1: string, field2: number"
 	parts := strings.Split(schemaStr, ",")
 	for _, part := range parts {
 		part = strings.TrimSpace(part)
 		if part == "" {
 			continue
 		}
 		kv := strings.Split(part, ":")
 		if len(kv) != 2 {
 			continue
 		}
 		fieldName := strings.TrimSpace(kv[0])
 		fieldType := strings.TrimSpace(kv[1])
 		schema.Fields[fieldName] = FieldSchema{
 			Type:     fieldType,
 			Nullable: false,
 		}
 	}
 	return schema, nil
 }
@@ -0,0 +1,216 @@
 package serviceadapter
 import (
 	"testing"
 )
 func TestValidateString(t *testing.T) {
 	schema := &FieldSchema{Type: "string"}
 	v := &Validator{schema: schema}
 	errs := v.Validate("hello")
 	if len(errs) != 0 {
 		t.Errorf("expected no errors for valid string, got %v", errs)
 	}
 	errs = v.Validate(42)
 	if len(errs) == 0 {
 		t.Errorf("expected error for non-string")
 	}
 	if len(errs) > 0 && !stringContains(errs[0].Reason, "type_mismatch") {
 		t.Errorf("expected type_mismatch error, got %s", errs[0].Reason)
 	}
 }
 func TestValidateNumber(t *testing.T) {
 	schema := &FieldSchema{Type: "number"}
 	v := &Validator{schema: schema}
 	errs := v.Validate(42.0)
 	if len(errs) != 0 {
 		t.Errorf("expected no errors for float64, got %v", errs)
 	}
 	errs = v.Validate("not a number")
 	if len(errs) == 0 {
 		t.Errorf("expected error for non-number")
 	}
 }
 func TestValidateNullable(t *testing.T) {
 	schemaNullable := &FieldSchema{Type: "string", Nullable: true}
 	vNullable := &Validator{schema: schemaNullable}
 	errs := vNullable.Validate(nil)
 	if len(errs) != 0 {
 		t.Errorf("expected no errors for null on nullable field, got %v", errs)
 	}
 	schemaNotNullable := &FieldSchema{Type: "string", Nullable: false}
 	vNotNullable := &Validator{schema: schemaNotNullable}
 	errs = vNotNullable.Validate(nil)
 	if len(errs) == 0 {
 		t.Errorf("expected error for null on non-nullable field")
 	}
 }
 func TestValidateObject(t *testing.T) {
 	schema := &FieldSchema{
 		Type:     "object",
 		Required: []string{"name"},
 		Fields: map[string]FieldSchema{
 			"name": {Type: "string"},
 			"age":  {Type: "number"},
 		},
 	}
 	v := &Validator{schema: schema}
 	// Valid object
 	obj := map[string]interface{}{
 		"name": "Alice",
 		"age":  30.0,
 	}
 	errs := v.Validate(obj)
 	if len(errs) != 0 {
 		t.Errorf("expected no errors for valid object, got %v", errs)
 	}
 	// Missing required field
 	objMissing := map[string]interface{}{
 		"age": 30.0,
 	}
 	errs = v.Validate(objMissing)
 	if len(errs) == 0 {
 		t.Errorf("expected error for missing required field")
 	}
 	if len(errs) > 0 && errs[0].Reason != "missing" {
 		t.Errorf("expected 'missing' error, got %s", errs[0].Reason)
 	}
 	// Type mismatch
 	objBadType := map[string]interface{}{
 		"name": "Alice",
 		"age":  "thirty",
 	}
 	errs = v.Validate(objBadType)
 	if len(errs) == 0 {
 		t.Errorf("expected error for type mismatch")
 	}
 }
 func TestValidateObjectStrict(t *testing.T) {
 	schema := &FieldSchema{
 		Type:   "object",
 		Strict: true,
 		Fields: map[string]FieldSchema{
 			"name": {Type: "string"},
 		},
 	}
 	v := &Validator{schema: schema}
 	// Unknown field rejected in strict mode
 	obj := map[string]interface{}{
 		"name":     "Alice",
 		"unknown": "field",
 	}
 	errs := v.Validate(obj)
 	if len(errs) == 0 {
 		t.Errorf("expected error for unknown field in strict mode")
 	}
 	found := false
 	for _, err := range errs {
 		if err.Reason == "unknown_field" {
 			found = true
 			break
 		}
 	}
 	if !found {
 		t.Errorf("expected unknown_field error")
 	}
 }
 func TestValidateArray(t *testing.T) {
 	schema := &FieldSchema{
 		Type: "array",
 		Items: &FieldSchema{
 			Type: "string",
 		},
 	}
 	v := &Validator{schema: schema}
 	// Valid array
 	arr := []interface{}{"a", "b", "c"}
 	errs := v.Validate(arr)
 	if len(errs) != 0 {
 		t.Errorf("expected no errors for valid string array, got %v", errs)
 	}
 	// Invalid element type
 	arrBad := []interface{}{"a", 42, "c"}
 	errs = v.Validate(arrBad)
 	if len(errs) == 0 {
 		t.Errorf("expected error for wrong type in array")
 	}
 }
 func TestValidateArrayOfObjects(t *testing.T) {
 	schema := &FieldSchema{
 		Type: "array",
 		Items: &FieldSchema{
 			Type: "object",
 			Fields: map[string]FieldSchema{
 				"id":   {Type: "number"},
 				"name": {Type: "string"},
 			},
 		},
 	}
 	v := &Validator{schema: schema}
 	arr := []interface{}{
 		map[string]interface{}{"id": 1.0, "name": "Alice"},
 		map[string]interface{}{"id": 2.0, "name": "Bob"},
 	}
 	errs := v.Validate(arr)
 	if len(errs) != 0 {
 		t.Errorf("expected no errors for valid array of objects, got %v", errs)
 	}
 }
 func TestValidateNoSchema(t *testing.T) {
 	// No schema means no validation
 	v := &Validator{schema: nil}
 	errs := v.Validate(map[string]interface{}{"anything": "goes"})
 	if len(errs) != 0 {
 		t.Errorf("expected no errors when schema is nil")
 	}
 }
 func TestParseSchema(t *testing.T) {
 	schema, err := parseSchema("name: string, age: number")
 	if err != nil {
 		t.Fatalf("parse error: %v", err)
 	}
 	if schema.Type != "object" {
 		t.Errorf("expected type object, got %s", schema.Type)
 	}
 	if len(schema.Fields) != 2 {
 		t.Errorf("expected 2 fields, got %d", len(schema.Fields))
 	}
 	if f, ok := schema.Fields["name"]; !ok || f.Type != "string" {
 		t.Errorf("expected name: string in parsed schema")
 	}
 }
 func stringContains(s, substr string) bool {
 	for i := 0; i < len(s); i++ {
 		if i+len(substr) <= len(s) && s[i:i+len(substr)] == substr {
 			return true
 		}
 	}
 	return false
 }
@@ -0,0 +1,377 @@
 package serviceadapter
 import (
 	"bytes"
 	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/temporal"
 )
 // WorkflowAdapter handles X-Service: workflow requests.
 // It forwards workflow operations to the Temporal gRPC service.
 // Users can specify namespace via the request payload.
 type WorkflowAdapter struct {
 	temporalHandler *temporal.Handler
 }
 // NewWorkflowAdapter creates a new WorkflowAdapter.
 func NewWorkflowAdapter(handler *temporal.Handler) *WorkflowAdapter {
 	return &WorkflowAdapter{
 		temporalHandler: handler,
 	}
 }
 // HandleStart handles workflow start requests.
 // Expects payload: { "namespace": "default", "workflow_id": "...", "workflow_type": "...", "task_queue": "...", "input": {...} }
 func (wa *WorkflowAdapter) HandleStart(w http.ResponseWriter, r *http.Request) {
 	wa.forwardToTemporal(w, r)
 }
 // HandleDescribe handles workflow describe requests.
 // Expects payload: { "namespace": "default", "workflow_id": "..." }
 func (wa *WorkflowAdapter) HandleDescribe(w http.ResponseWriter, r *http.Request) {
 	wa.forwardToTemporal(w, r)
 }
 // HandleList handles workflow list requests.
 // Expects payload: { "namespace": "default", "query": "..." (optional) }
 func (wa *WorkflowAdapter) HandleList(w http.ResponseWriter, r *http.Request) {
 	wa.forwardToTemporal(w, r)
 }
 // HandleHistory handles workflow history requests.
 // Expects payload: { "namespace": "default", "workflow_id": "..." }
 func (wa *WorkflowAdapter) HandleHistory(w http.ResponseWriter, r *http.Request) {
 	wa.forwardToTemporal(w, r)
 }
 // HandleTerminate handles workflow termination.
 // Expects payload: { "namespace": "default", "workflow_id": "...", "reason": "..." }
 func (wa *WorkflowAdapter) HandleTerminate(w http.ResponseWriter, r *http.Request) {
 	wa.forwardToTemporal(w, r)
 }
 // HandleCancel handles workflow cancellation.
 // Expects payload: { "namespace": "default", "workflow_id": "..." }
 func (wa *WorkflowAdapter) HandleCancel(w http.ResponseWriter, r *http.Request) {
 	wa.forwardToTemporal(w, r)
 }
 // HandleSignal handles workflow signal.
 // Expects payload: { "namespace": "default", "workflow_id": "...", "signal_name": "...", "signal_data": {...} }
 func (wa *WorkflowAdapter) HandleSignal(w http.ResponseWriter, r *http.Request) {
 	wa.forwardToTemporal(w, r)
 }
 // HandleQuery handles workflow query.
 // Expects payload: { "namespace": "default", "workflow_id": "...", "query_type": "...", "query_data": {...} }
 func (wa *WorkflowAdapter) HandleQuery(w http.ResponseWriter, r *http.Request) {
 	wa.forwardToTemporal(w, r)
 }
 // HandleReset handles workflow reset.
 // Expects payload: { "namespace": "default", "workflow_id": "...", "reset_type": "..." }
 func (wa *WorkflowAdapter) HandleReset(w http.ResponseWriter, r *http.Request) {
 	wa.forwardToTemporal(w, r)
 }
 // HandleUpdate handles workflow update.
 // Expects payload: { "namespace": "default", "workflow_id": "...", "update_data": {...} }
 func (wa *WorkflowAdapter) HandleUpdate(w http.ResponseWriter, r *http.Request) {
 	wa.forwardToTemporal(w, r)
 }
 // resourceToAction maps X-Resource names to Temporal action names.
 var resourceToAction = map[string]string{
 	"execute":    "START_WORKFLOW",
 	"describe":   "DESCRIBE_WORKFLOW",
 	"list":       "LIST_WORKFLOWS",
 	"history":    "GET_WORKFLOW_HISTORY",
 	"terminate":  "TERMINATE_WORKFLOW",
 	"cancel":     "CANCEL_WORKFLOW",
 	"signal":     "SIGNAL_WORKFLOW",
 	"query":      "QUERY_WORKFLOW",
 	"reset":      "RESET_WORKFLOW",
 	"update":     "UPDATE_WORKFLOW",
 }
 // ServeHTTP implements http.Handler for X-Service: workflow routing.
 // Maps X-Resource header to Temporal action, injects action into body,
 // and forwards to the temporal handler.
 func (wa *WorkflowAdapter) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	resource := r.Header.Get("X-Resource")
 	action, ok := resourceToAction[resource]
 	if !ok {
 		w.Header().Set("Content-Type", "application/json")
 		w.WriteHeader(http.StatusNotFound)
 		fmt.Fprintf(w, `{"error":"unknown workflow resource: %s"}`, resource)
 		return
 	}
 	// Read body, inject action, forward
 	body, err := io.ReadAll(r.Body)
 	if err != nil {
 		w.Header().Set("Content-Type", "application/json")
 		w.WriteHeader(http.StatusBadRequest)
 		fmt.Fprintf(w, `{"error":"failed to read body: %s"}`, err.Error())
 		return
 	}
 	var payload map[string]interface{}
 	if len(body) > 0 {
 		if err := json.Unmarshal(body, &payload); err != nil {
 			w.Header().Set("Content-Type", "application/json")
 			w.WriteHeader(http.StatusBadRequest)
 			fmt.Fprintf(w, `{"error":"invalid JSON: %s"}`, err.Error())
 			return
 		}
 	} else {
 		payload = make(map[string]interface{})
 	}
 	// Inject action into body for temporal handler
 	payload["action"] = action
 	// namespace is required for all workflow operations
 	if ns, ok := payload["namespace"].(string); !ok || ns == "" {
 		w.Header().Set("Content-Type", "application/json")
 		w.WriteHeader(http.StatusBadRequest)
 		fmt.Fprintf(w, `{"error":"namespace is required"}`)
 		return
 	}
 	newBody, _ := json.Marshal(payload)
 	r.Body = io.NopCloser(bytes.NewReader(newBody))
 	r.ContentLength = int64(len(newBody))
 	r.URL.Path = "/workflow"
 	wa.temporalHandler.ServeHTTP(w, r)
 }
 // forwardToTemporal reads the request body, ensures namespace is specified,
 // and forwards to the temporal handler.
 func (wa *WorkflowAdapter) forwardToTemporal(w http.ResponseWriter, r *http.Request) {
 	// Read request body
 	body, err := io.ReadAll(r.Body)
 	if err != nil {
 		http.Error(w, fmt.Sprintf("failed to read request body: %v", err), http.StatusBadRequest)
 		return
 	}
 	defer r.Body.Close()
 	// Parse JSON to check for namespace
 	var payload map[string]interface{}
 	if err := json.Unmarshal(body, &payload); err != nil {
 		http.Error(w, fmt.Sprintf("invalid JSON payload: %v", err), http.StatusBadRequest)
 		return
 	}
 	// Ensure namespace is specified (required for Temporal routing)
 	namespace, ok := payload["namespace"].(string)
 	if !ok || namespace == "" {
 		http.Error(w, `"namespace" field required in payload`, http.StatusBadRequest)
 		return
 	}
 	// Forward to temporal handler by calling it with the request
 	// Restore body for temporal handler
 	r.Body = io.NopCloser(bytes.NewReader(body))
 	r.ContentLength = int64(len(body))
 	// Call temporal handler
 	wa.temporalHandler.ServeHTTP(w, r)
 }
 // GetSpec returns the ServiceAdapter spec for workflow service.
 // This defines the available resources and methods.
 func GetWorkflowSpec() *Spec {
 	return &Spec{
 		ServiceName: "workflow",
 		Upstream: Upstream{
 			URL:            "grpc://temporal:7233", // gRPC endpoint
 			TimeoutSeconds: 30,
 		},
 		Auth: Auth{
 			Required:   false,
 			Capability: "workflow:execute",
 		},
 		Retryable: true,
 		Resources: []Resource{
 			{
 				Name: "execute",
 				Methods: []Method{
 					{
 						Verb:           "POST",
 						UpstreamPath:   "/temporal.workflowservice.v1.WorkflowService/StartWorkflowExecution",
 						RequestSchema:  "workflow_start_request",
 						ResponseSchema: "workflow_start_response",
 						Auth: &Auth{
 							Required:   true,
 							Capability: "workflow:execute",
 						},
 					},
 				},
 			},
 			{
 				Name: "describe",
 				Methods: []Method{
 					{
 						Verb:           "GET",
 					},
 					{
 						Verb:           "POST",
 						UpstreamPath:   "/temporal.workflowservice.v1.WorkflowService/DescribeWorkflowExecution",
 						RequestSchema:  "workflow_describe_request",
 						ResponseSchema: "workflow_describe_response",
 						Auth: &Auth{
 							Required:   true,
 							Capability: "workflow:read",
 						},
 					},
 				},
 			},
 			{
 				Name: "list",
 				Methods: []Method{
 					{
 						Verb:           "GET",
 					},
 					{
 						Verb:           "POST",
 						UpstreamPath:   "/temporal.workflowservice.v1.WorkflowService/ListWorkflowExecutions",
 						RequestSchema:  "workflow_list_request",
 						ResponseSchema: "workflow_list_response",
 						Auth: &Auth{
 							Required:   true,
 							Capability: "workflow:read",
 						},
 					},
 				},
 			},
 			{
 				Name: "history",
 				Methods: []Method{
 					{
 						Verb:           "GET",
 					},
 					{
 						Verb:           "POST",
 						UpstreamPath:   "/temporal.workflowservice.v1.WorkflowService/GetWorkflowExecutionHistory",
 						RequestSchema:  "workflow_history_request",
 						ResponseSchema: "workflow_history_response",
 						Auth: &Auth{
 							Required:   true,
 							Capability: "workflow:read",
 						},
 					},
 				},
 			},
 			{
 				Name: "terminate",
 				Methods: []Method{
 					{
 						Verb:           "POST",
 						UpstreamPath:   "/temporal.workflowservice.v1.WorkflowService/TerminateWorkflowExecution",
 						RequestSchema:  "workflow_terminate_request",
 						ResponseSchema: "workflow_terminate_response",
 						Auth: &Auth{
 							Required:   true,
 							Capability: "workflow:execute",
 						},
 					},
 				},
 			},
 			{
 				Name: "cancel",
 				Methods: []Method{
 					{
 						Verb:           "POST",
 						UpstreamPath:   "/temporal.workflowservice.v1.WorkflowService/RequestCancelWorkflowExecution",
 						RequestSchema:  "workflow_cancel_request",
 						ResponseSchema: "workflow_cancel_response",
 						Auth: &Auth{
 							Required:   true,
 							Capability: "workflow:execute",
 						},
 					},
 				},
 			},
 			{
 				Name: "signal",
 				Methods: []Method{
 					{
 						Verb:           "POST",
 						UpstreamPath:   "/temporal.workflowservice.v1.WorkflowService/SignalWorkflowExecution",
 						RequestSchema:  "workflow_signal_request",
 						ResponseSchema: "workflow_signal_response",
 						Auth: &Auth{
 							Required:   true,
 							Capability: "workflow:signal",
 						},
 					},
 				},
 			},
 			{
 				Name: "query",
 				Methods: []Method{
 					{
 						Verb:           "POST",
 						UpstreamPath:   "/temporal.workflowservice.v1.WorkflowService/QueryWorkflow",
 						RequestSchema:  "workflow_query_request",
 						ResponseSchema: "workflow_query_response",
 						Auth: &Auth{
 							Required:   true,
 							Capability: "workflow:query",
 						},
 					},
 				},
 			},
 			{
 				Name: "reset",
 				Methods: []Method{
 					{
 						Verb:           "POST",
 						UpstreamPath:   "/temporal.workflowservice.v1.WorkflowService/ResetWorkflowExecution",
 						RequestSchema:  "workflow_reset_request",
 						ResponseSchema: "workflow_reset_response",
 						Auth: &Auth{
 							Required:   true,
 							Capability: "workflow:execute",
 						},
 					},
 				},
 			},
 			{
 				Name: "update",
 				Methods: []Method{
 					{
 						Verb:           "POST",
 						UpstreamPath:   "/temporal.workflowservice.v1.WorkflowService/UpdateWorkflowExecution",
 						RequestSchema:  "workflow_update_request",
 						ResponseSchema: "workflow_update_response",
 						Auth: &Auth{
 							Required:   true,
 							Capability: "workflow:execute",
 						},
 					},
 				},
 			},
 			{
 				Name: "stream",
 				Methods: []Method{
 					{
 						Verb:         "GET",
 						UpstreamPath: "/workflow/stream",
 						Auth: &Auth{
 							Required:   true,
 							Capability: "workflow:read",
 						},
 					},
 				},
 			},
 		},
 	}
 }
@@ -0,0 +1,39 @@
 package serviceadapter_test
 import (
 	"net/http"
 	"net/http/httptest"
 	"strings"
 	"testing"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/serviceadapter"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/temporal"
 )
 func TestWorkflowListRequiresNamespace(t *testing.T) {
 	th := temporal.NewHandler("localhost:7233")
 	wfAdapter := serviceadapter.NewWorkflowAdapter(th)
 	wfSpec := serviceadapter.GetWorkflowSpec()
 	adapter := &serviceadapter.ServiceAdapter{
 		ServiceName: "workflow",
 		Handler:     wfAdapter,
 		Spec:        *wfSpec,
 	}
 	registry := serviceadapter.NewRegistry(nil)
 	registry.Add(adapter)
 	dispatcher := serviceadapter.NewDispatcher(registry, nil)
 	// POST X-Service: workflow X-Resource: list body: {} (no namespace)
 	req := httptest.NewRequest(http.MethodPost, "/", strings.NewReader(`{}`))
 	req.Header.Set("X-Service", "workflow")
 	req.Header.Set("X-Resource", "list")
 	req.Header.Set("Content-Type", "application/json")
 	w := httptest.NewRecorder()
 	dispatcher.Dispatch(w, req)
 	t.Logf("Status: %d Body: %s", w.Code, w.Body.String())
 	if w.Code != http.StatusBadRequest {
 		t.Errorf("expected 400, got %d", w.Code)
 	}
 }
@@ -0,0 +1,97 @@
 // Package sessions — FleetClient calls the SandboxFleet controller REST API
 // to assign sessions to fleet pods. This is the primary sandbox path;
 // the raw-k8s SandboxManager is the fallback when the fleet controller
 // is unavailable (e.g. during fleet rollout).
 package sessions
 import (
 	"bytes"
 	"context"
 	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
 	"os"
 	"time"
 )
 const (
 	defaultFleetControllerURL = "http://tool-definition-controller.poimen.svc.cluster.local:8788"
 )
 // FleetClient calls the SandboxFleet controller REST API.
 type FleetClient struct {
 	baseURL string
 	client  *http.Client
 }
 // FleetAssignResult is returned by the controller assign endpoint.
 type FleetAssignResult struct {
 	PodSvcDns string `json:"podSvcDns"`
 	PodName   string `json:"podName"`
 }
 // NewFleetClient creates a FleetClient from env or default URL.
 // FLEET_CONTROLLER_URL — default: defaultFleetControllerURL
 func NewFleetClient() *FleetClient {
 	url := os.Getenv("FLEET_CONTROLLER_URL")
 	if url == "" {
 		url = defaultFleetControllerURL
 	}
 	return &FleetClient{
 		baseURL: url,
 		client:  &http.Client{Timeout: 35 * time.Second},
 	}
 }
 // Assign asks the fleet controller to assign sessionID to a fleet pod.
 // Returns the pod's ClusterIP service DNS and pod name.
 func (f *FleetClient) Assign(ctx context.Context, sessionID string) (*FleetAssignResult, error) {
 	req, err := http.NewRequestWithContext(ctx, http.MethodPost,
 		f.baseURL+"/sessions/"+sessionID+"/assign", nil)
 	if err != nil {
 		return nil, fmt.Errorf("build request: %w", err)
 	}
 	req.Header.Set("Content-Type", "application/json")
 	resp, err := f.client.Do(req)
 	if err != nil {
 		return nil, fmt.Errorf("fleet controller unreachable: %w", err)
 	}
 	defer resp.Body.Close()
 	if resp.StatusCode >= 300 {
 		body, _ := io.ReadAll(io.LimitReader(resp.Body, 512))
 		return nil, fmt.Errorf("fleet controller returned %d: %s", resp.StatusCode, body)
 	}
 	var result FleetAssignResult
 	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
 		return nil, fmt.Errorf("decode: %w", err)
 	}
 	if result.PodSvcDns == "" {
 		return nil, fmt.Errorf("fleet controller returned empty podSvcDns")
 	}
 	return &result, nil
 }
 // Release notifies the fleet controller that a session has ended.
 // Cleans up the per-session ServiceAccount (audit trail SA).
 // Non-fatal: fleet controller handles this async.
 func (f *FleetClient) Release(ctx context.Context, sessionID string) error {
 	req, err := http.NewRequestWithContext(ctx, http.MethodDelete,
 		f.baseURL+"/sessions/"+sessionID, bytes.NewReader(nil))
 	if err != nil {
 		return fmt.Errorf("build request: %w", err)
 	}
 	resp, err := f.client.Do(req)
 	if err != nil {
 		return fmt.Errorf("fleet controller unreachable: %w", err)
 	}
 	defer resp.Body.Close()
 	if resp.StatusCode >= 300 {
 		body, _ := io.ReadAll(io.LimitReader(resp.Body, 512))
 		return fmt.Errorf("fleet controller returned %d: %s", resp.StatusCode, body)
 	}
 	return nil
 }
@@ -0,0 +1,634 @@
 // Package sessions provides the internal handler for the sessions service adapter.
 // It bridges the api-gw REST surface to poimen-graphql for all reads and writes:
 //
 //   - Reads:  hybridSearch / entity queries
 //   - Writes: upsertEntity mutation (direct, no LLM extraction)
 //
 // All IDs passed by the caller (session_id, episode_id) go as query params because
 // the ServiceAdapter dispatcher does not substitute URL path parameters.
 // episode_id is sha256(session_id + milestone_id + attempt) — callers compute it the
 // same way; the handler accepts it on write and returns it on read.
 package sessions
 import (
 	"bytes"
 	"context"
 	"crypto/sha256"
 	"encoding/json"
 	"fmt"
 	"log"
 	"net/http"
 	"os"
 	"time"
 	"github.com/google/uuid"
 	"forgejo.riotpiao.com/rock/homelab-frontend/internal/tracing"
 )
 const (
 	defaultGraphQLURL = "http://poimen-graphql.poimen.svc.cluster.local:8090/graphql"
 )
 // Handler handles session REST endpoints via internal service calls.
 // All traffic (reads and writes) goes to graphqlURL (poimen-graphql).
 // Sandbox creates/deletes pi-session pods via the SandboxFleet controller
 // (primary) with SandboxManager as direct-k8s fallback.
 type Handler struct {
 	graphqlURL string
 	client     *http.Client
 	sandbox    *SandboxManager
 	fleet      *FleetClient
 }
 // NewHandler creates a Handler reading upstream URL from env var.
 // GRAPHQL_UPSTREAM_URL — default: defaultGraphQLURL
 func NewHandler() *Handler {
 	gql := os.Getenv("GRAPHQL_UPSTREAM_URL")
 	if gql == "" {
 		gql = defaultGraphQLURL
 	}
 	h := &Handler{
 		graphqlURL: gql,
 		client:     &http.Client{Timeout: 30 * time.Second, Transport: tracing.NewTransport(nil)},
 		sandbox:    NewSandboxManager(),
 		fleet:      NewFleetClient(),
 	}
 	h.startIdleReaper()
 	return h
 }
 // startIdleReaper launches a background goroutine that deletes exited pi-session
 // pods (bridge.js idle-timeout triggered) while preserving their PVCs.
 func (h *Handler) startIdleReaper() {
 	intervalStr := os.Getenv("SANDBOX_REAPER_INTERVAL_MINUTES")
 	interval := defaultReaperInterval
 	if intervalStr != "" {
 		var min int
 		if n, _ := fmt.Sscanf(intervalStr, "%d", &min); n == 1 && min > 0 {
 			interval = time.Duration(min) * time.Minute
 		}
 	}
 	go func() {
 		ticker := time.NewTicker(interval)
 		defer ticker.Stop()
 		for range ticker.C {
 			h.sandbox.ReapIdlePods(context.Background())
 		}
 	}()
 }
 // ServeHTTP routes by X-Upstream-Path set by the dispatcher.
 func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	path := r.Header.Get("X-Upstream-Path")
 	switch path {
 	case "/v1/sessions/create":
 		h.handleCreate(w, r)
 	case "/v1/sessions/list":
 		h.handleList(w, r)
 	case "/v1/sessions/get":
 		h.handleGet(w, r)
 	case "/v1/sessions/patch":
 		h.handlePatch(w, r)
 	case "/v1/sessions/milestones/create":
 		h.handleCreateMilestone(w, r)
 	case "/v1/sessions/episodes/list":
 		h.handleListEpisodes(w, r)
 	case "/v1/sessions/episodes/get":
 		h.handleGetEpisode(w, r)
 	case "/v1/sessions/sandbox":
 		h.handleSandbox(w, r)
 	default:
 		writeJSON(w, http.StatusNotFound, map[string]string{"error": "sessions endpoint not found"})
 	}
 }
 // ── request / response types ──────────────────────────────────────────────────
 type createSessionReq struct {
 	Name string `json:"name"`
 	Goal string `json:"goal,omitempty"`
 	Cwd  string `json:"cwd,omitempty"`
 }
 type sessionResp struct {
 	SessionID     string `json:"session_id"`
 	Name          string `json:"name"`
 	Goal          string `json:"goal,omitempty"`
 	Status        string `json:"status"`
 	MemoryProject string `json:"memory_project"`
 	Cwd           string `json:"cwd,omitempty"`
 	CreatedAt     string `json:"created_at"`
 }
 type patchSessionReq struct {
 	Name   *string `json:"name,omitempty"`
 	Goal   *string `json:"goal,omitempty"`
 	Status *string `json:"status,omitempty"`
 }
 type createMilestoneReq struct {
 	Title    string  `json:"title"`
 	OrderIdx int     `json:"order_idx"`
 	ParentID *string `json:"parent_id,omitempty"`
 }
 type milestoneResp struct {
 	MilestoneID string  `json:"milestone_id"`
 	SessionID   string  `json:"session_id"`
 	Title       string  `json:"title"`
 	Status      string  `json:"status"`
 	OrderIdx    int     `json:"order_idx"`
 	ParentID    *string `json:"parent_id,omitempty"`
 	CreatedAt   string  `json:"created_at"`
 }
 // ── handlers ──────────────────────────────────────────────────────────────────
 // POST /v1/sessions  (X-Resource: sessions)
 func (h *Handler) handleCreate(w http.ResponseWriter, r *http.Request) {
 	var req createSessionReq
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
 		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid JSON"})
 		return
 	}
 	if req.Name == "" {
 		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "name is required"})
 		return
 	}
 	sessionID := uuid.New().String()
 	project := "session-" + sessionID
 	now := time.Now().UTC().Format(time.RFC3339)
 	summaryBytes, err := json.Marshal(map[string]any{
 		"id":             sessionID,
 		"name":           req.Name,
 		"goal":           req.Goal,
 		"status":         "active",
 		"cwd":            req.Cwd,
 		"memory_project": project,
 		"created_at":     now,
 	})
 	if err != nil {
 		writeJSON(w, http.StatusInternalServerError, map[string]string{"error": "marshal failed: " + err.Error()})
 		return
 	}
 	if _, err := h.upsertEntity(r, project, sessionID, "SESSION", string(summaryBytes)); err != nil {
 		writeJSON(w, http.StatusBadGateway, map[string]string{"error": "upsert failed: " + err.Error()})
 		return
 	}
 	writeJSON(w, http.StatusCreated, sessionResp{
 		SessionID:     sessionID,
 		Name:          req.Name,
 		Goal:          req.Goal,
 		Status:        "active",
 		MemoryProject: project,
 		Cwd:           req.Cwd,
 		CreatedAt:     now,
 	})
 }
 // GET /v1/sessions  (X-Resource: sessions)  ?status=active&cwd=/path
 func (h *Handler) handleList(w http.ResponseWriter, r *http.Request) {
 	q := r.URL.Query()
 	status := q.Get("status")
 	cwd := q.Get("cwd")
 	limitStr := q.Get("limit")
 	limit := 50
 	if limitStr != "" {
 		fmt.Sscanf(limitStr, "%d", &limit) //nolint:errcheck
 	}
 	if limit > 200 {
 		limit = 200
 	}
 	searchQuery := "session"
 	if status != "" {
 		searchQuery = fmt.Sprintf("session status:%s", status)
 	}
 	if cwd != "" {
 		searchQuery = fmt.Sprintf("%s cwd:%s", searchQuery, cwd)
 	}
 	// entities query (not hybridSearch) — project arg is optional, so it queries
 	// across ALL projects. Required because each session lives in its own
 	// session-<uuid> project; there is no single project to hybridSearch against.
 	gqlQuery := `query($q:String!,$limit:Int!){
 		entities(query:$q,limit:$limit,entityType:SESSION){
 			entities{id name summary projectId tCreated}
 			searchMode
 		}
 	}`
 	vars := map[string]any{"q": searchQuery, "limit": limit}
 	result, err := h.gql(r, gqlQuery, vars)
 	if err != nil {
 		writeJSON(w, http.StatusBadGateway, map[string]string{"error": "graphql query failed: " + err.Error()})
 		return
 	}
 	writeJSON(w, http.StatusOK, result)
 }
 // GET /v1/sessions/:id  (X-Resource: session)  ?session_id=<uuid>
 func (h *Handler) handleGet(w http.ResponseWriter, r *http.Request) {
 	sessionID := r.URL.Query().Get("session_id")
 	if sessionID == "" {
 		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "session_id query param required"})
 		return
 	}
 	project := "session-" + sessionID
 	gqlQuery := `query($id:String!,$project:String!){
 		hybridSearch(query:$id,project:$project,limit:1,entityType:SESSION){
 			entities{id name summary tCreated}
 		}
 	}`
 	vars := map[string]any{"id": sessionID, "project": project}
 	result, err := h.gql(r, gqlQuery, vars)
 	if err != nil {
 		writeJSON(w, http.StatusBadGateway, map[string]string{"error": "graphql query failed: " + err.Error()})
 		return
 	}
 	writeJSON(w, http.StatusOK, result)
 }
 // PATCH /v1/sessions/:id  (X-Resource: session)  ?session_id=<uuid>
 func (h *Handler) handlePatch(w http.ResponseWriter, r *http.Request) {
 	sessionID := r.URL.Query().Get("session_id")
 	if sessionID == "" {
 		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "session_id query param required"})
 		return
 	}
 	var req patchSessionReq
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
 		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid JSON"})
 		return
 	}
 	now := time.Now().UTC().Format(time.RFC3339)
 	project := "session-" + sessionID
 	// Read current summary so the upsert carries all existing fields.
 	current, err := h.fetchEntitySummary(r, project, sessionID, "SESSION")
 	if err != nil {
 		writeJSON(w, http.StatusBadGateway, map[string]string{"error": "fetch failed: " + err.Error()})
 		return
 	}
 	current["updated_at"] = now
 	if req.Name != nil {
 		current["name"] = *req.Name
 	}
 	if req.Goal != nil {
 		current["goal"] = *req.Goal
 	}
 	if req.Status != nil {
 		current["status"] = *req.Status
 		if *req.Status == "archived" {
 			current["archived_at"] = now
 		}
 	}
 	summaryBytes, err := json.Marshal(current)
 	if err != nil {
 		writeJSON(w, http.StatusInternalServerError, map[string]string{"error": "marshal failed: " + err.Error()})
 		return
 	}
 	if _, err := h.upsertEntity(r, project, sessionID, "SESSION", string(summaryBytes)); err != nil {
 		writeJSON(w, http.StatusBadGateway, map[string]string{"error": "upsert failed: " + err.Error()})
 		return
 	}
 	writeJSON(w, http.StatusOK, map[string]string{"session_id": sessionID, "status": "updated"})
 }
 // POST /v1/sessions/:id/milestones  (X-Resource: milestones)  ?session_id=<uuid>
 func (h *Handler) handleCreateMilestone(w http.ResponseWriter, r *http.Request) {
 	sessionID := r.URL.Query().Get("session_id")
 	if sessionID == "" {
 		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "session_id query param required"})
 		return
 	}
 	var req createMilestoneReq
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
 		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid JSON"})
 		return
 	}
 	if req.Title == "" {
 		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "title is required"})
 		return
 	}
 	milestoneID := uuid.New().String()
 	now := time.Now().UTC().Format(time.RFC3339)
 	project := "session-" + sessionID
 	msContent := map[string]any{
 		"type":       "MILESTONE",
 		"id":         milestoneID,
 		"session_id": sessionID,
 		"title":      req.Title,
 		"status":     "pending",
 		"order_idx":  req.OrderIdx,
 		"created_at": now,
 	}
 	if req.ParentID != nil {
 		msContent["parent_id"] = *req.ParentID
 	}
 	summaryBytes, err := json.Marshal(msContent)
 	if err != nil {
 		writeJSON(w, http.StatusInternalServerError, map[string]string{"error": "marshal failed: " + err.Error()})
 		return
 	}
 	if _, err := h.upsertEntity(r, project, milestoneID, "MILESTONE", string(summaryBytes)); err != nil {
 		writeJSON(w, http.StatusBadGateway, map[string]string{"error": "upsert failed: " + err.Error()})
 		return
 	}
 	writeJSON(w, http.StatusCreated, milestoneResp{
 		MilestoneID: milestoneID,
 		SessionID:   sessionID,
 		Title:       req.Title,
 		Status:      "pending",
 		OrderIdx:    req.OrderIdx,
 		ParentID:    req.ParentID,
 		CreatedAt:   now,
 	})
 }
 // GET /v1/sessions/:id/episodes  (X-Resource: episodes)  ?session_id=<uuid>
 func (h *Handler) handleListEpisodes(w http.ResponseWriter, r *http.Request) {
 	sessionID := r.URL.Query().Get("session_id")
 	if sessionID == "" {
 		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "session_id query param required"})
 		return
 	}
 	limitStr := r.URL.Query().Get("limit")
 	limit := 50
 	if limitStr != "" {
 		fmt.Sscanf(limitStr, "%d", &limit) //nolint:errcheck
 	}
 	if limit > 200 {
 		limit = 200
 	}
 	project := "session-" + sessionID
 	gqlQuery := `query($project:String!,$limit:Int!){
 		hybridSearch(query:"episode",project:$project,limit:$limit,entityType:EPISODE){
 			entities{id name summary tCreated}
 			searchMode
 		}
 	}`
 	vars := map[string]any{"project": project, "limit": limit}
 	result, err := h.gql(r, gqlQuery, vars)
 	if err != nil {
 		writeJSON(w, http.StatusBadGateway, map[string]string{"error": "graphql query failed: " + err.Error()})
 		return
 	}
 	writeJSON(w, http.StatusOK, result)
 }
 // GET /v1/sessions/:id/episodes/:eid  (X-Resource: episode)
 // ?session_id=<uuid>&episode_id=<sha256>
 func (h *Handler) handleGetEpisode(w http.ResponseWriter, r *http.Request) {
 	q := r.URL.Query()
 	sessionID := q.Get("session_id")
 	episodeID := q.Get("episode_id")
 	if sessionID == "" || episodeID == "" {
 		writeJSON(w, http.StatusBadRequest, map[string]string{
 			"error": "session_id and episode_id query params required",
 		})
 		return
 	}
 	gqlQuery := `query($id:ID!){
 		entity(id:$id){
 			id name entityType summary tCreated
 			edges{
 				relationType fact confidence
 				target{name entityType}
 			}
 		}
 	}`
 	vars := map[string]any{"id": episodeID}
 	result, err := h.gql(r, gqlQuery, vars)
 	if err != nil {
 		writeJSON(w, http.StatusBadGateway, map[string]string{"error": "graphql query failed: " + err.Error()})
 		return
 	}
 	writeJSON(w, http.StatusOK, result)
 }
 // ── helpers ───────────────────────────────────────────────────────────────────
 // upsertEntity runs a GraphQL upsertEntity mutation on poimen-graphql.
 // Writes are direct (no LLM extraction). Returns the entity id assigned by the server.
 // The name field is used as the stable upsert key within (project, entityType).
 func (h *Handler) upsertEntity(r *http.Request, project, name, entityType, summary string) (string, error) {
 	mutation := `mutation($input:UpsertEntityInput!){
 		upsertEntity(input:$input){ id created }
 	}`
 	vars := map[string]any{
 		"input": map[string]any{
 			"project":    project,
 			"name":       name,
 			"entityType": entityType,
 			"summary":    summary,
 		},
 	}
 	result, err := h.gql(r, mutation, vars)
 	if err != nil {
 		return "", err
 	}
 	data, _ := result.(map[string]any)
 	d, _ := data["data"].(map[string]any)
 	entity, _ := d["upsertEntity"].(map[string]any)
 	id, _ := entity["id"].(string)
 	return id, nil
 }
 // fetchEntitySummary fetches the current summary blob of an entity by (project, name, entityType).
 // Returns a parsed map so callers can merge patch fields before re-upserting.
 // Returns empty map (not error) if no entity found.
 func (h *Handler) fetchEntitySummary(r *http.Request, project, name, entityType string) (map[string]any, error) {
 	gqlQuery := `query($q:String!,$project:String!,$entityType:GqlEntityType!,$limit:Int!){
 		hybridSearch(query:$q,project:$project,limit:$limit,entityType:$entityType){
 			entities{id name summary tCreated}
 		}
 	}`
 	vars := map[string]any{
 		"q":          name,
 		"project":    project,
 		"entityType": entityType,
 		"limit":      1,
 	}
 	result, err := h.gql(r, gqlQuery, vars)
 	if err != nil {
 		return nil, err
 	}
 	data, _ := result.(map[string]any)
 	d, _ := data["data"].(map[string]any)
 	search, _ := d["hybridSearch"].(map[string]any)
 	entities, _ := search["entities"].([]any)
 	if len(entities) == 0 {
 		return map[string]any{}, nil
 	}
 	entity, _ := entities[0].(map[string]any)
 	summaryStr, _ := entity["summary"].(string)
 	var summary map[string]any
 	if summaryStr != "" {
 		if err := json.Unmarshal([]byte(summaryStr), &summary); err != nil {
 			return map[string]any{}, nil // corrupt summary — start fresh
 		}
 	}
 	if summary == nil {
 		summary = map[string]any{}
 	}
 	return summary, nil
 }
 // gql executes a GraphQL query against poimen-graphql, forwarding the caller's JWT.
 func (h *Handler) gql(r *http.Request, query string, variables map[string]any) (any, error) {
 	payload, err := json.Marshal(map[string]any{
 		"query":     query,
 		"variables": variables,
 	})
 	if err != nil {
 		return nil, fmt.Errorf("marshal: %w", err)
 	}
 	req, err := http.NewRequestWithContext(r.Context(), http.MethodPost,
 		h.graphqlURL, bytes.NewReader(payload))
 	if err != nil {
 		return nil, fmt.Errorf("build request: %w", err)
 	}
 	req.Header.Set("Content-Type", "application/json")
 	if auth := r.Header.Get("Authorization"); auth != "" {
 		req.Header.Set("Authorization", auth)
 	}
 	resp, err := h.client.Do(req)
 	if err != nil {
 		return nil, fmt.Errorf("http: %w", err)
 	}
 	defer resp.Body.Close()
 	if resp.StatusCode >= 300 {
 		return nil, fmt.Errorf("graphql returned %d", resp.StatusCode)
 	}
 	var result map[string]any
 	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
 		return nil, fmt.Errorf("decode: %w", err)
 	}
 	if errs, ok := result["errors"]; ok && errs != nil {
 		b, _ := json.Marshal(errs)
 		return nil, fmt.Errorf("graphql errors: %s", b)
 	}
 	return result, nil
 }
 // handleSandbox dispatches POST (create/resume) and DELETE (teardown).
 // Both take ?session_id= as a query param.
 func (h *Handler) handleSandbox(w http.ResponseWriter, r *http.Request) {
 	sessionID := r.URL.Query().Get("session_id")
 	if sessionID == "" {
 		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "session_id query param required"})
 		return
 	}
 	switch r.Method {
 	case http.MethodPost:
 		h.handleSandboxCreate(w, r, sessionID)
 	case http.MethodDelete:
 		h.handleSandboxDelete(w, r, sessionID)
 	default:
 		writeJSON(w, http.StatusMethodNotAllowed, map[string]string{"error": "method not allowed"})
 	}
 }
 // POST ?session_id= — assign session to SandboxFleet pod (primary) or
 // create a dedicated pod via SandboxManager (fallback).
 func (h *Handler) handleSandboxCreate(w http.ResponseWriter, r *http.Request, sessionID string) {
 	// Primary: fleet controller assigns session to a pre-warmed pod.
 	if assign, err := h.fleet.Assign(r.Context(), sessionID); err == nil {
 		svcDns := assign.PodSvcDns + fmt.Sprintf(":%d", sandboxPort)
 		log.Printf("sandbox: fleet assigned session=%s pod=%s dns=%s", sessionID, assign.PodName, svcDns)
 		go h.updateSandboxSummary(r, sessionID, assign.PodName, "", svcDns)
 		writeJSON(w, http.StatusOK, map[string]any{
 			"session_id": sessionID,
 			"pod_name":   assign.PodName,
 			"svc_dns":    svcDns,
 			"resumed":    false,
 			"fleet":      true,
 		})
 		return
 	} else {
 		log.Printf("sandbox: fleet unavailable for session=%s (%v), falling back to direct k8s", sessionID, err)
 	}
 	// Fallback: create a dedicated pod via SandboxManager.
 	result, err := h.sandbox.CreateOrResume(r.Context(), sessionID)
 	if err != nil {
 		log.Printf("sandbox create/resume session=%s: %v", sessionID, err)
 		writeJSON(w, http.StatusBadGateway, map[string]string{"error": "sandbox error: " + err.Error()})
 		return
 	}
 	go h.updateSandboxSummary(r, sessionID, result.PodName, result.PVCName, result.SvcDNS)
 	log.Printf("sandbox: direct pod session=%s pod=%s resumed=%v dns=%s", sessionID, result.PodName, result.Resumed, result.SvcDNS)
 	writeJSON(w, http.StatusOK, result)
 }
 // updateSandboxSummary merges pod/svc metadata into the session memory_entity (fire-and-forget).
 // Uses context.Background() because r.Context() is cancelled once the HTTP handler returns.
 func (h *Handler) updateSandboxSummary(r *http.Request, sessionID, podName, pvcName, svcDns string) {
 	// Build a detached request carrying just the auth header.
 	detached, _ := http.NewRequestWithContext(context.Background(), r.Method, r.URL.String(), nil)
 	if auth := r.Header.Get("Authorization"); auth != "" {
 		detached.Header.Set("Authorization", auth)
 	}
 	current, _ := h.fetchEntitySummary(detached, "session-"+sessionID, sessionID, "SESSION")
 	if current == nil {
 		current = map[string]any{}
 	}
 	current["pod_name"] = podName
 	current["svc_dns"] = svcDns
 	current["last_active_at"] = time.Now().UTC().Format(time.RFC3339)
 	if pvcName != "" {
 		current["pvc_name"] = pvcName
 	}
 	if b, err := json.Marshal(current); err == nil {
 		h.upsertEntity(r, "session-"+sessionID, sessionID, "SESSION", string(b)) //nolint:errcheck
 	}
 }
 // DELETE ?session_id= — release from fleet + delete dedicated pod+svc+pvc if any.
 func (h *Handler) handleSandboxDelete(w http.ResponseWriter, r *http.Request, sessionID string) {
 	// Release from fleet (cleans up per-session SA; non-fatal if session was fleet-based).
 	if err := h.fleet.Release(r.Context(), sessionID); err != nil {
 		log.Printf("sandbox: fleet release session=%s: %v (continuing)", sessionID, err)
 	}
 	// Also attempt direct k8s cleanup (no-ops if resources don't exist).
 	if err := h.sandbox.Delete(r.Context(), sessionID); err != nil {
 		log.Printf("sandbox delete session=%s: %v", sessionID, err)
 	}
 	log.Printf("sandbox: released session=%s", sessionID)
 	writeJSON(w, http.StatusOK, map[string]string{"session_id": sessionID, "status": "deleted"})
 }
 // EpisodeID computes the deterministic episode ID per §4.14 Q6:
 // sha256(session_id + milestone_id + attempt).
 // Exported so callers can verify the value the server would produce.
 func EpisodeID(sessionID, milestoneID string, attempt int) string {
 	h := sha256.New()
 	h.Write([]byte(fmt.Sprintf("%s%s%d", sessionID, milestoneID, attempt)))
 	return fmt.Sprintf("%x", h.Sum(nil))
 }
 func writeJSON(w http.ResponseWriter, status int, data any) {
 	w.Header().Set("Content-Type", "application/json")
 	w.WriteHeader(status)
 	json.NewEncoder(w).Encode(data) //nolint:errcheck
 }
@@ -0,0 +1,594 @@
 package sessions
 import (
 	"crypto/sha256"
 	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
 	"net/http/httptest"
 	"strings"
 	"testing"
 	"time"
 )
 // ── stub servers ──────────────────────────────────────────────────────────────
 // newGQLServer returns a test server that routes by inspecting the request body's
 // "query" field and records captured request bodies.
 //
 //   - "upsertEntity" → mutation response
 //   - "hybridSearch"  → search response (get, patch, episodes handlers)
 //   - "entities"      → list response (sessions list handler)
 //   - "entity"        → single entity response
 func newGQLServer(t *testing.T, captured *[]byte) *httptest.Server {
 	t.Helper()
 	return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		body, _ := io.ReadAll(r.Body)
 		if captured != nil {
 			*captured = body
 		}
 		w.Header().Set("Content-Type", "application/json")
 		bs := string(body)
 		switch {
 		case strings.Contains(bs, "upsertEntity"):
 			fmt.Fprint(w, `{"data":{"upsertEntity":{"id":"test-entity-id","created":true}}}`)
 		case strings.Contains(bs, "hybridSearch"):
 			// get, patch, episodes handlers still use hybridSearch
 			fmt.Fprint(w, `{"data":{"hybridSearch":{"entities":[]}}}`)
 		case strings.Contains(bs, "entities"):
 			// sessions list handler uses entities query
 			fmt.Fprint(w, `{"data":{"entities":{"entities":[]}}}`)
 		case strings.Contains(bs, "entity"):
 			fmt.Fprint(w, `{"data":{"entity":null}}`)
 		default:
 			fmt.Fprint(w, `{"data":{}}`)
 		}
 	}))
 }
 // buildHandler wires a Handler with the supplied graphql URL.
 func buildHandler(gqlURL string) *Handler {
 	return &Handler{
 		graphqlURL: gqlURL,
 		client:     &http.Client{Timeout: 5 * time.Second},
 	}
 }
 // do fires a request through the handler ServeHTTP. path sets X-Upstream-Path.
 func do(h *Handler, method, path, upstreamPath, body, query string) *httptest.ResponseRecorder {
 	var bodyReader io.Reader
 	if body != "" {
 		bodyReader = strings.NewReader(body)
 	} else {
 		bodyReader = http.NoBody
 	}
 	url := "/"
 	if query != "" {
 		url = "/?" + query
 	}
 	req := httptest.NewRequest(method, url, bodyReader)
 	req.Header.Set("X-Upstream-Path", upstreamPath)
 	if body != "" {
 		req.Header.Set("Content-Type", "application/json")
 	}
 	_ = path // kept for readability in callers
 	rr := httptest.NewRecorder()
 	h.ServeHTTP(rr, req)
 	return rr
 }
 // jsonBody decodes response body into map.
 func jsonBody(t *testing.T, rr *httptest.ResponseRecorder) map[string]any {
 	t.Helper()
 	var out map[string]any
 	if err := json.Unmarshal(rr.Body.Bytes(), &out); err != nil {
 		t.Fatalf("decode body: %v — raw: %s", err, rr.Body.String())
 	}
 	return out
 }
 // ── 1. handleCreate ───────────────────────────────────────────────────────────
 func TestHandleCreate(t *testing.T) {
 	t.Run("missing name → 400", func(t *testing.T) {
 		gql := newGQLServer(t, nil)
 		defer gql.Close()
 		h := buildHandler(gql.URL)
 		rr := do(h, http.MethodPost, "/v1/sessions/create", "/v1/sessions/create",
 			`{"goal":"some goal"}`, "")
 		if rr.Code != http.StatusBadRequest {
 			t.Fatalf("want 400, got %d", rr.Code)
 		}
 	})
 	t.Run("bad JSON → 400", func(t *testing.T) {
 		gql := newGQLServer(t, nil)
 		defer gql.Close()
 		h := buildHandler(gql.URL)
 		rr := do(h, http.MethodPost, "/v1/sessions/create", "/v1/sessions/create",
 			`not json`, "")
 		if rr.Code != http.StatusBadRequest {
 			t.Fatalf("want 400, got %d", rr.Code)
 		}
 	})
 	t.Run("upsert graphql error → 502", func(t *testing.T) {
 		gqlErr := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 			w.Header().Set("Content-Type", "application/json")
 			w.WriteHeader(200)
 			fmt.Fprint(w, `{"errors":[{"message":"resolver error"}]}`)
 		}))
 		defer gqlErr.Close()
 		h := buildHandler(gqlErr.URL)
 		rr := do(h, http.MethodPost, "/v1/sessions/create", "/v1/sessions/create",
 			`{"name":"fail-session"}`, "")
 		if rr.Code != http.StatusBadGateway {
 			t.Fatalf("want 502, got %d", rr.Code)
 		}
 		if !strings.Contains(rr.Body.String(), "upsert failed:") {
 			t.Fatalf("want 'upsert failed:' in body, got: %s", rr.Body.String())
 		}
 	})
 	t.Run("upsert 200 → 201 with session_id, status=active, memory_project", func(t *testing.T) {
 		gql := newGQLServer(t, nil)
 		defer gql.Close()
 		h := buildHandler(gql.URL)
 		rr := do(h, http.MethodPost, "/v1/sessions/create", "/v1/sessions/create",
 			`{"name":"my-session","goal":"finish task"}`, "")
 		if rr.Code != http.StatusCreated {
 			t.Fatalf("want 201, got %d — body: %s", rr.Code, rr.Body.String())
 		}
 		body := jsonBody(t, rr)
 		if _, ok := body["session_id"]; !ok {
 			t.Fatal("missing session_id")
 		}
 		if body["status"] != "active" {
 			t.Fatalf("want status=active, got %v", body["status"])
 		}
 		proj, _ := body["memory_project"].(string)
 		if !strings.HasPrefix(proj, "session-") {
 			t.Fatalf("memory_project must start with 'session-', got %s", proj)
 		}
 	})
 }
 // ── 2. handleList ─────────────────────────────────────────────────────────────
 func TestHandleList(t *testing.T) {
 	t.Run("no params → 200, gql called with query containing 'session'", func(t *testing.T) {
 		var captured []byte
 		gql := newGQLServer(t, &captured)
 		defer gql.Close()
 		h := buildHandler(gql.URL)
 		rr := do(h, http.MethodGet, "/v1/sessions/list", "/v1/sessions/list", "", "")
 		if rr.Code != http.StatusOK {
 			t.Fatalf("want 200, got %d", rr.Code)
 		}
 		if !strings.Contains(string(captured), "session") {
 			t.Fatalf("gql payload missing 'session': %s", captured)
 		}
 	})
 	t.Run("status=paused → gql query contains 'status:paused'", func(t *testing.T) {
 		var captured []byte
 		gql := newGQLServer(t, &captured)
 		defer gql.Close()
 		h := buildHandler(gql.URL)
 		rr := do(h, http.MethodGet, "/v1/sessions/list", "/v1/sessions/list", "", "status=paused")
 		if rr.Code != http.StatusOK {
 			t.Fatalf("want 200, got %d", rr.Code)
 		}
 		if !strings.Contains(string(captured), "status:paused") {
 			t.Fatalf("gql payload missing 'status:paused': %s", captured)
 		}
 	})
 	t.Run("graphql errors body → 502", func(t *testing.T) {
 		gql2 := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 			w.WriteHeader(500)
 			fmt.Fprint(w, `{"errors":[{"message":"resolver error"}]}`)
 		}))
 		defer gql2.Close()
 		h2 := buildHandler(gql2.URL)
 		rr := do(h2, http.MethodGet, "/v1/sessions/list", "/v1/sessions/list", "", "")
 		if rr.Code != http.StatusBadGateway {
 			t.Fatalf("want 502, got %d — body: %s", rr.Code, rr.Body.String())
 		}
 	})
 }
 // ── 3. handleGet ─────────────────────────────────────────────────────────────
 func TestHandleGet(t *testing.T) {
 	t.Run("missing session_id → 400", func(t *testing.T) {
 		gql := newGQLServer(t, nil)
 		defer gql.Close()
 		h := buildHandler(gql.URL)
 		rr := do(h, http.MethodGet, "/v1/sessions/get", "/v1/sessions/get", "", "")
 		if rr.Code != http.StatusBadRequest {
 			t.Fatalf("want 400, got %d", rr.Code)
 		}
 	})
 	t.Run("success → 200, gql called with session-scoped project", func(t *testing.T) {
 		var captured []byte
 		gql := newGQLServer(t, &captured)
 		defer gql.Close()
 		h := buildHandler(gql.URL)
 		sid := "abc-123"
 		rr := do(h, http.MethodGet, "/v1/sessions/get", "/v1/sessions/get", "", "session_id="+sid)
 		if rr.Code != http.StatusOK {
 			t.Fatalf("want 200, got %d — body: %s", rr.Code, rr.Body.String())
 		}
 		if !strings.Contains(string(captured), "session-"+sid) {
 			t.Fatalf("gql payload missing scoped project 'session-%s': %s", sid, captured)
 		}
 	})
 }
 // ── 4. handlePatch ────────────────────────────────────────────────────────────
 func TestHandlePatch(t *testing.T) {
 	t.Run("missing session_id → 400", func(t *testing.T) {
 		gql := newGQLServer(t, nil)
 		defer gql.Close()
 		h := buildHandler(gql.URL)
 		rr := do(h, http.MethodPatch, "/v1/sessions/patch", "/v1/sessions/patch",
 			`{"status":"paused"}`, "")
 		if rr.Code != http.StatusBadRequest {
 			t.Fatalf("want 400, got %d", rr.Code)
 		}
 	})
 	t.Run("bad JSON → 400", func(t *testing.T) {
 		gql := newGQLServer(t, nil)
 		defer gql.Close()
 		h := buildHandler(gql.URL)
 		rr := do(h, http.MethodPatch, "/v1/sessions/patch", "/v1/sessions/patch",
 			`not json`, "session_id=abc-123")
 		if rr.Code != http.StatusBadRequest {
 			t.Fatalf("want 400, got %d", rr.Code)
 		}
 	})
 	t.Run("upsert success → 200 with session_id, status=updated", func(t *testing.T) {
 		var secondCall []byte
 		callCount := 0
 		gqlServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
 			body, _ := io.ReadAll(req.Body)
 			bodyStr := string(body)
 			w.Header().Set("Content-Type", "application/json")
 			callCount++
 			if strings.Contains(bodyStr, "hybridSearch") {
 				summary := `{"id":"sess-1","name":"abc-123","status":"active","goal":"old-goal"}`
 				fmt.Fprintf(w, `{"data":{"hybridSearch":{"entities":[{"id":"eid","name":"abc-123","summary":%q,"tCreated":"2026-01-01T00:00:00Z"}]}}}`, summary)
 			} else {
 				secondCall = body
 				fmt.Fprint(w, `{"data":{"upsertEntity":{"id":"eid","created":false}}}`)
 			}
 		}))
 		defer gqlServer.Close()
 		h := buildHandler(gqlServer.URL)
 		sid := "abc-123"
 		rr := do(h, http.MethodPatch, "/v1/sessions/patch", "/v1/sessions/patch",
 			`{"status":"paused"}`, "session_id="+sid)
 		if rr.Code != http.StatusOK {
 			t.Fatalf("want 200, got %d — body: %s", rr.Code, rr.Body.String())
 		}
 		body := jsonBody(t, rr)
 		if body["session_id"] != sid {
 			t.Fatalf("want session_id=%s, got %v", sid, body["session_id"])
 		}
 		if body["status"] != "updated" {
 			t.Fatalf("want status=updated, got %v", body["status"])
 		}
 		if callCount != 2 {
 			t.Fatalf("want 2 gql calls (hybridSearch+upsert), got %d", callCount)
 		}
 		if !strings.Contains(string(secondCall), "paused") {
 			t.Fatalf("upsert payload missing merged status: %s", secondCall)
 		}
 	})
 	t.Run("upsert error → 502", func(t *testing.T) {
 		gqlServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
 			body, _ := io.ReadAll(req.Body)
 			w.Header().Set("Content-Type", "application/json")
 			if strings.Contains(string(body), "hybridSearch") {
 				fmt.Fprint(w, `{"data":{"hybridSearch":{"entities":[]}}}`)
 			} else {
 				fmt.Fprint(w, `{"errors":[{"message":"write error"}]}`)
 			}
 		}))
 		defer gqlServer.Close()
 		h := buildHandler(gqlServer.URL)
 		rr := do(h, http.MethodPatch, "/v1/sessions/patch", "/v1/sessions/patch",
 			`{"status":"paused"}`, "session_id=abc-123")
 		if rr.Code != http.StatusBadGateway {
 			t.Fatalf("want 502, got %d — body: %s", rr.Code, rr.Body.String())
 		}
 	})
 }
 // ── 5. handleCreateMilestone ─────────────────────────────────────────────────
 func TestHandleCreateMilestone(t *testing.T) {
 	t.Run("missing session_id → 400", func(t *testing.T) {
 		gql := newGQLServer(t, nil)
 		defer gql.Close()
 		h := buildHandler(gql.URL)
 		rr := do(h, http.MethodPost, "/v1/sessions/milestones/create", "/v1/sessions/milestones/create",
 			`{"title":"step 1"}`, "")
 		if rr.Code != http.StatusBadRequest {
 			t.Fatalf("want 400, got %d", rr.Code)
 		}
 	})
 	t.Run("missing title → 400", func(t *testing.T) {
 		gql := newGQLServer(t, nil)
 		defer gql.Close()
 		h := buildHandler(gql.URL)
 		rr := do(h, http.MethodPost, "/v1/sessions/milestones/create", "/v1/sessions/milestones/create",
 			`{"order_idx":1}`, "session_id=abc-123")
 		if rr.Code != http.StatusBadRequest {
 			t.Fatalf("want 400, got %d", rr.Code)
 		}
 	})
 	t.Run("upsert error → 502", func(t *testing.T) {
 		gqlErr := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 			w.Header().Set("Content-Type", "application/json")
 			fmt.Fprint(w, `{"errors":[{"message":"write error"}]}`)
 		}))
 		defer gqlErr.Close()
 		h := buildHandler(gqlErr.URL)
 		rr := do(h, http.MethodPost, "/v1/sessions/milestones/create", "/v1/sessions/milestones/create",
 			`{"title":"step 1","order_idx":0}`, "session_id=abc-123")
 		if rr.Code != http.StatusBadGateway {
 			t.Fatalf("want 502, got %d — body: %s", rr.Code, rr.Body.String())
 		}
 	})
 	t.Run("success → 201 with milestone_id, session_id, status=pending", func(t *testing.T) {
 		gql := newGQLServer(t, nil)
 		defer gql.Close()
 		h := buildHandler(gql.URL)
 		sid := "abc-123"
 		rr := do(h, http.MethodPost, "/v1/sessions/milestones/create", "/v1/sessions/milestones/create",
 			`{"title":"phase 1","order_idx":0}`, "session_id="+sid)
 		if rr.Code != http.StatusCreated {
 			t.Fatalf("want 201, got %d — body: %s", rr.Code, rr.Body.String())
 		}
 		body := jsonBody(t, rr)
 		if _, ok := body["milestone_id"]; !ok {
 			t.Fatal("missing milestone_id")
 		}
 		if body["session_id"] != sid {
 			t.Fatalf("want session_id=%s, got %v", sid, body["session_id"])
 		}
 		if body["status"] != "pending" {
 			t.Fatalf("want status=pending, got %v", body["status"])
 		}
 	})
 }
 // ── 6. handleListEpisodes ─────────────────────────────────────────────────────
 func TestHandleListEpisodes(t *testing.T) {
 	t.Run("missing session_id → 400", func(t *testing.T) {
 		gql := newGQLServer(t, nil)
 		defer gql.Close()
 		h := buildHandler(gql.URL)
 		rr := do(h, http.MethodGet, "/v1/sessions/episodes/list", "/v1/sessions/episodes/list",
 			"", "")
 		if rr.Code != http.StatusBadRequest {
 			t.Fatalf("want 400, got %d", rr.Code)
 		}
 	})
 	t.Run("limit > 200 clamped → gql called with limit=200", func(t *testing.T) {
 		var captured []byte
 		gql := newGQLServer(t, &captured)
 		defer gql.Close()
 		h := buildHandler(gql.URL)
 		rr := do(h, http.MethodGet, "/v1/sessions/episodes/list", "/v1/sessions/episodes/list",
 			"", "session_id=abc-123&limit=999")
 		if rr.Code != http.StatusOK {
 			t.Fatalf("want 200, got %d — body: %s", rr.Code, rr.Body.String())
 		}
 		// Verify GQL was called (body non-empty).
 		if len(captured) == 0 {
 			t.Fatal("gql not called")
 		}
 		// GQL was called; handler clamps limit to 200.
 	})
 	t.Run("success → 200", func(t *testing.T) {
 		gql := newGQLServer(t, nil)
 		defer gql.Close()
 		h := buildHandler(gql.URL)
 		rr := do(h, http.MethodGet, "/v1/sessions/episodes/list", "/v1/sessions/episodes/list",
 			"", "session_id=abc-123")
 		if rr.Code != http.StatusOK {
 			t.Fatalf("want 200, got %d — body: %s", rr.Code, rr.Body.String())
 		}
 	})
 }
 // ── 7. handleGetEpisode ───────────────────────────────────────────────────────
 func TestHandleGetEpisode(t *testing.T) {
 	t.Run("missing session_id → 400", func(t *testing.T) {
 		gql := newGQLServer(t, nil)
 		defer gql.Close()
 		h := buildHandler(gql.URL)
 		rr := do(h, http.MethodGet, "/v1/sessions/episodes/get", "/v1/sessions/episodes/get",
 			"", "episode_id=deadbeef")
 		if rr.Code != http.StatusBadRequest {
 			t.Fatalf("want 400, got %d", rr.Code)
 		}
 	})
 	t.Run("missing episode_id → 400", func(t *testing.T) {
 		gql := newGQLServer(t, nil)
 		defer gql.Close()
 		h := buildHandler(gql.URL)
 		rr := do(h, http.MethodGet, "/v1/sessions/episodes/get", "/v1/sessions/episodes/get",
 			"", "session_id=abc-123")
 		if rr.Code != http.StatusBadRequest {
 			t.Fatalf("want 400, got %d", rr.Code)
 		}
 	})
 	t.Run("success → 200", func(t *testing.T) {
 		gql := newGQLServer(t, nil)
 		defer gql.Close()
 		h := buildHandler(gql.URL)
 		rr := do(h, http.MethodGet, "/v1/sessions/episodes/get", "/v1/sessions/episodes/get",
 			"", "session_id=abc-123&episode_id=deadbeef")
 		if rr.Code != http.StatusOK {
 			t.Fatalf("want 200, got %d — body: %s", rr.Code, rr.Body.String())
 		}
 	})
 }
 // ── 8. EpisodeID helper ───────────────────────────────────────────────────────
 func TestEpisodeID(t *testing.T) {
 	sid := "session-abc"
 	mid := "milestone-xyz"
 	attempt := 1
 	h := sha256.New()
 	h.Write([]byte(fmt.Sprintf("%s%s%d", sid, mid, attempt)))
 	expected := fmt.Sprintf("%x", h.Sum(nil))
 	got := EpisodeID(sid, mid, attempt)
 	if got != expected {
 		t.Fatalf("EpisodeID mismatch: want %s, got %s", expected, got)
 	}
 	// Sanity: different inputs differ.
 	if EpisodeID(sid, mid, 2) == got {
 		t.Fatal("attempt 2 must differ from attempt 1")
 	}
 }
 // ── 9. unknown path → 404 ────────────────────────────────────────────────────
 func TestUnknownPath(t *testing.T) {
 	gql := newGQLServer(t, nil)
 	defer gql.Close()
 	h := buildHandler(gql.URL)
 	rr := do(h, http.MethodGet, "/v1/sessions/unknown", "/v1/sessions/unknown", "", "")
 	if rr.Code != http.StatusNotFound {
 		t.Fatalf("want 404, got %d", rr.Code)
 	}
 	body := jsonBody(t, rr)
 	if body["error"] == nil {
 		t.Fatal("missing error field in 404 response")
 	}
 }
 // ── table-driven summary for handleCreate (extra variants) ───────────────────
 func TestHandleCreate_Table(t *testing.T) {
 	tests := []struct {
 		name       string
 		body       string
 		wantStatus int
 	}{
 		{"valid", `{"name":"s1"}`, http.StatusCreated},
 		{"empty name", `{"name":""}`, http.StatusBadRequest},
 		{"empty_name_string", `{"name":""}`, http.StatusBadRequest},
 	}
 	for _, tc := range tests {
 		t.Run(tc.name, func(t *testing.T) {
 			gql := newGQLServer(t, nil)
 			defer gql.Close()
 			h := buildHandler(gql.URL)
 			rr := do(h, http.MethodPost, "/v1/sessions/create", "/v1/sessions/create", tc.body, "")
 			if rr.Code != tc.wantStatus {
 				t.Fatalf("want %d, got %d — body: %s", tc.wantStatus, rr.Code, rr.Body.String())
 			}
 		})
 	}
 }
 // ── table-driven summary for handlePatch ─────────────────────────────────────
 func TestHandlePatch_Table(t *testing.T) {
 	validSID := "session_id=abc-123"
 	tests := []struct {
 		name       string
 		query      string
 		body       string
 		wantStatus int
 	}{
 		{"ok", validSID, `{"status":"paused"}`, http.StatusOK},
 		{"no session_id", "", `{"status":"paused"}`, http.StatusBadRequest},
 		{"bad json", validSID, `{bad}`, http.StatusBadRequest},
 	}
 	for _, tc := range tests {
 		t.Run(tc.name, func(t *testing.T) {
 			gql := newGQLServer(t, nil)
 			defer gql.Close()
 			h := buildHandler(gql.URL)
 			rr := do(h, http.MethodPatch, "/v1/sessions/patch", "/v1/sessions/patch",
 				tc.body, tc.query)
 			if rr.Code != tc.wantStatus {
 				t.Fatalf("want %d, got %d — body: %s", tc.wantStatus, rr.Code, rr.Body.String())
 			}
 		})
 	}
 }
 // ── verify upsertEntity mutation payload ─────────────────────────────────────
 func TestHandleCreate_IngestPayload(t *testing.T) {
 	var captured []byte
 	gql := newGQLServer(t, &captured)
 	defer gql.Close()
 	h := buildHandler(gql.URL)
 	rr := do(h, http.MethodPost, "/v1/sessions/create", "/v1/sessions/create",
 		`{"name":"test-session","goal":"do stuff"}`, "")
 	if rr.Code != http.StatusCreated {
 		t.Fatalf("want 201, got %d", rr.Code)
 	}
 	bs := string(captured)
 	if !strings.Contains(bs, "upsertEntity") {
 		t.Fatalf("gql body missing 'upsertEntity': %s", bs)
 	}
 	if !strings.Contains(bs, "SESSION") {
 		t.Fatalf("gql body missing 'SESSION': %s", bs)
 	}
 }
@@ -0,0 +1,492 @@
 // Package sessions — SandboxManager provisions per-session k8s resources:
 //
 //	PVC   workspace-session-<uuid>   Longhorn 1Gi
 //	Pod   pi-session-<uuid>           single container, /workspace <- PVC
 //	Svc   pi-session-<uuid>           ClusterIP :8787
 //	NetPol pi-session-sandbox         shared for all pi-session pods (created once)
 //
 // All k8s API calls use raw HTTP + in-cluster SA token (no client-go).
 // Same pattern as internal/webhook/promoter.go.
 package sessions
 import (
 	"bytes"
 	"context"
 	"crypto/tls"
 	"crypto/x509"
 	"encoding/json"
 	"fmt"
 	"io"
 	"log"
 	"net/http"
 	"os"
 	"strings"
 	"time"
 )
 const (
 	sandboxNamespace    = "poimen"
 	sandboxImage        = "forgejo.riotpiao.com/riotpiao-poimen/poimen-pi-session-runtime:latest"
 	sandboxPort         = 8787
 	defaultPVCSize      = "1Gi"
 	defaultStorageClass = "longhorn"
 	defaultReadyTimeout  = 30 * time.Second
 	defaultReaperInterval = 5 * time.Minute
 	sandboxSATokenPath  = "/var/run/secrets/kubernetes.io/serviceaccount/token"
 	sandboxCACertPath   = "/var/run/secrets/kubernetes.io/serviceaccount/ca.crt"
 )
 // SandboxManager manages the k8s lifecycle of pi-session Pods, PVCs, Services.
 type SandboxManager struct {
 	k8sHost      string
 	k8sClient    *http.Client
 	pvcSize      string
 	readyTimeout time.Duration
 }
 // SandboxResult is returned by CreateOrResume.
 type SandboxResult struct {
 	SessionID string `json:"session_id"`
 	PodName   string `json:"pod_name"`
 	PVCName   string `json:"pvc_name"`
 	SvcDNS    string `json:"svc_dns"`
 	Resumed   bool   `json:"resumed"` // true = pod already existed
 }
 // NewSandboxManager creates a SandboxManager from env + in-cluster SA files.
 func NewSandboxManager() *SandboxManager {
 	host := os.Getenv("K8S_API_HOST")
 	if host == "" {
 		host = "https://kubernetes.default.svc"
 	}
 	pvcSize := os.Getenv("SANDBOX_PVC_SIZE")
 	if pvcSize == "" {
 		pvcSize = defaultPVCSize
 	}
 	caCert, _ := os.ReadFile(sandboxCACertPath)
 	return &SandboxManager{
 		k8sHost:      host,
 		k8sClient:    buildSandboxK8sClient(caCert),
 		pvcSize:      pvcSize,
 		readyTimeout: defaultReadyTimeout,
 	}
 }
 func buildSandboxK8sClient(caCert []byte) *http.Client {
 	transport := &http.Transport{}
 	if len(caCert) > 0 {
 		pool := x509.NewCertPool()
 		pool.AppendCertsFromPEM(caCert)
 		transport.TLSClientConfig = &tls.Config{RootCAs: pool}
 	} else {
 		log.Printf("sandbox: WARNING no SA CA cert at %s — using InsecureSkipVerify", sandboxCACertPath)
 		transport.TLSClientConfig = &tls.Config{InsecureSkipVerify: true} //nolint:gosec
 	}
 	return &http.Client{Timeout: 30 * time.Second, Transport: transport}
 }
 func sandboxSAToken() string {
 	b, err := os.ReadFile(sandboxSATokenPath)
 	if err != nil {
 		log.Printf("sandbox: WARNING failed to read SA token %s: %v", sandboxSATokenPath, err)
 		return ""
 	}
 	return strings.TrimSpace(string(b))
 }
 func pvcName(sessionID string) string { return "workspace-session-" + sessionID }
 func podName(sessionID string) string { return "pi-session-" + sessionID }
 func svcName(sessionID string) string { return "pi-session-" + sessionID }
 func svcDNS(sessionID string) string {
 	return fmt.Sprintf("%s.%s.svc.cluster.local:%d", svcName(sessionID), sandboxNamespace, sandboxPort)
 }
 // ── public API ────────────────────────────────────────────────────────────
 // CreateOrResume provisions or resumes a sandbox for sessionID.
 // Idempotent: if the pod is already Running, returns its DNS immediately.
 func (s *SandboxManager) CreateOrResume(ctx context.Context, sessionID string) (*SandboxResult, error) {
 	res := &SandboxResult{
 		SessionID: sessionID,
 		PodName:   podName(sessionID),
 		PVCName:   pvcName(sessionID),
 		SvcDNS:    svcDNS(sessionID),
 	}
 	// 1. Ensure PVC exists
 	if err := s.ensurePVC(ctx, sessionID); err != nil {
 		return nil, fmt.Errorf("ensure PVC: %w", err)
 	}
 	// 2. Check if pod already running (resume case)
 	phase, err := s.getPodPhase(ctx, sessionID)
 	if err != nil {
 		return nil, fmt.Errorf("check pod: %w", err)
 	}
 	if phase == "Running" {
 		res.Resumed = true
 		return res, nil
 	}
 	// 3. Ensure NetworkPolicy for all pi-session pods exists
 	if err := s.ensureNetworkPolicy(ctx); err != nil {
 		log.Printf("sandbox: WARNING failed to ensure network policy: %v", err)
 	}
 	// 4. Create Pod + Service
 	if err := s.createPod(ctx, sessionID); err != nil {
 		return nil, fmt.Errorf("create pod: %w", err)
 	}
 	if err := s.ensureService(ctx, sessionID); err != nil {
 		return nil, fmt.Errorf("ensure service: %w", err)
 	}
 	// 5. Wait for Ready
 	if err := s.waitPodReady(ctx, sessionID); err != nil {
 		return nil, fmt.Errorf("wait ready: %w", err)
 	}
 	return res, nil
 }
 // Delete removes the Pod, Service, and PVC for sessionID.
 func (s *SandboxManager) Delete(ctx context.Context, sessionID string) error {
 	var errs []string
 	for _, fn := range []func(context.Context, string) error{
 		s.deletePod, s.deleteService, s.deletePVC,
 	} {
 		if err := fn(ctx, sessionID); err != nil && !isNotFound(err) {
 			errs = append(errs, err.Error())
 		}
 	}
 	if len(errs) > 0 {
 		return fmt.Errorf("delete sandbox: %s", strings.Join(errs, "; "))
 	}
 	return nil
 }
 // ReapIdlePods lists all pi-session-* pods and deletes those that have exited
 // (Succeeded/Failed) — bridge.js self-exits after idle timeout.
 // The PVC is preserved so the next CreateOrResume reattaches the same workspace.
 func (s *SandboxManager) ReapIdlePods(ctx context.Context) {
 	pods, err := s.listSandboxPods(ctx)
 	if err != nil {
 		log.Printf("sandbox reaper: list pods: %v", err)
 		return
 	}
 	for _, podAny := range pods {
 		pod, _ := podAny.(map[string]any)
 		phase, _ := pod["status"].(map[string]any)["phase"].(string)
 		name, _ := pod["metadata"].(map[string]any)["name"].(string)
 		if phase == "Succeeded" || phase == "Failed" {
 			log.Printf("sandbox reaper: deleting exited pod %s (phase=%s)", name, phase)
 			if err := s.k8sDelete(ctx, "/api/v1/namespaces/"+sandboxNamespace+"/pods/"+name); err != nil && !isNotFound(err) {
 				log.Printf("sandbox reaper: delete pod %s: %v", name, err)
 			}
 		}
 	}
 }
 // ── k8s resource helpers ─────────────────────────────────────────────────
 func (s *SandboxManager) ensurePVC(ctx context.Context, sessionID string) error {
 	name := pvcName(sessionID)
 	_, err := s.k8sGet(ctx, "/api/v1/namespaces/"+sandboxNamespace+"/persistentvolumeclaims/"+name)
 	if err == nil {
 		return nil // already exists
 	}
 	if !isNotFound(err) {
 		return err
 	}
 	// Create
 	body := map[string]any{
 		"apiVersion": "v1",
 		"kind":       "PersistentVolumeClaim",
 		"metadata": map[string]any{
 			"name": name, "namespace": sandboxNamespace,
 			"labels": map[string]string{"app": "pi-session", "session-id": sessionID},
 		},
 		"spec": map[string]any{
 			"accessModes":      []string{"ReadWriteOnce"},
 			"storageClassName": defaultStorageClass,
 			"resources": map[string]any{
 				"requests": map[string]string{"storage": s.pvcSize},
 			},
 		},
 	}
 	return s.k8sCreate(ctx, "/api/v1/namespaces/"+sandboxNamespace+"/persistentvolumeclaims", body)
 }
 func (s *SandboxManager) getPodPhase(ctx context.Context, sessionID string) (string, error) {
 	pod, err := s.k8sGet(ctx, "/api/v1/namespaces/"+sandboxNamespace+"/pods/"+podName(sessionID))
 	if isNotFound(err) {
 		return "", nil
 	}
 	if err != nil {
 		return "", err
 	}
 	phase, _ := pod["status"].(map[string]any)["phase"].(string)
 	return phase, nil
 }
 func (s *SandboxManager) createPod(ctx context.Context, sessionID string) error {
 	body := map[string]any{
 		"apiVersion": "v1",
 		"kind":       "Pod",
 		"metadata": map[string]any{
 			"name": podName(sessionID), "namespace": sandboxNamespace,
 			"labels": map[string]string{"app": "pi-session", "session-id": sessionID},
 		},
 		"spec": map[string]any{
 			"restartPolicy":                "Never",
 			"automountServiceAccountToken": false,
 			"securityContext": map[string]any{
 				"runAsNonRoot": true,
 				"runAsUser":    int64(1000),
 				"seccompProfile": map[string]string{"type": "RuntimeDefault"},
 			},
 			"containers": []map[string]any{{
 				"name":  "pi-session",
 				"image": sandboxImage,
 				"ports": []map[string]any{{"containerPort": sandboxPort}},
 				"securityContext": map[string]any{
 					"readOnlyRootFilesystem":   true,
 					"allowPrivilegeEscalation": false,
 					"capabilities": map[string]any{"drop": []string{"ALL"}},
 				},
 				"resources": map[string]any{
 					"requests": map[string]string{"cpu": "500m", "memory": "512Mi"},
 					"limits":   map[string]string{"cpu": "1", "memory": "1Gi"},
 				},
 				"readinessProbe": map[string]any{
 					"tcpSocket":           map[string]any{"port": sandboxPort},
 					"initialDelaySeconds": 3,
 					"periodSeconds":       2,
 					"failureThreshold":    15,
 				},
 				"volumeMounts": []map[string]any{
 					{"name": "workspace", "mountPath": "/workspace"},
 					{"name": "tmp", "mountPath": "/tmp"},
 				},
 			}},
 			"volumes": []map[string]any{
 				{"name": "workspace", "persistentVolumeClaim": map[string]string{"claimName": pvcName(sessionID)}},
 				{"name": "tmp", "emptyDir": map[string]any{}},
 			},
 		},
 	}
 	return s.k8sCreate(ctx, "/api/v1/namespaces/"+sandboxNamespace+"/pods", body)
 }
 func (s *SandboxManager) ensureService(ctx context.Context, sessionID string) error {
 	name := svcName(sessionID)
 	_, err := s.k8sGet(ctx, "/api/v1/namespaces/"+sandboxNamespace+"/services/"+name)
 	if err == nil {
 		return nil
 	}
 	if !isNotFound(err) {
 		return err
 	}
 	body := map[string]any{
 		"apiVersion": "v1",
 		"kind":       "Service",
 		"metadata": map[string]any{
 			"name": name, "namespace": sandboxNamespace,
 			"labels": map[string]string{"app": "pi-session", "session-id": sessionID},
 		},
 		"spec": map[string]any{
 			"type":     "ClusterIP",
 			"selector": map[string]string{"app": "pi-session", "session-id": sessionID},
 			"ports": []map[string]any{{
 				"port": sandboxPort, "targetPort": sandboxPort, "protocol": "TCP",
 			}},
 		},
 	}
 	return s.k8sCreate(ctx, "/api/v1/namespaces/"+sandboxNamespace+"/services", body)
 }
 func (s *SandboxManager) ensureNetworkPolicy(ctx context.Context) error {
 	const npName = "pi-session-sandbox"
 	_, err := s.k8sGet(ctx, "/apis/networking.k8s.io/v1/namespaces/"+sandboxNamespace+"/networkpolicies/"+npName)
 	if err == nil {
 		return nil // already exists
 	}
 	if !isNotFound(err) {
 		return err
 	}
 	body := map[string]any{
 		"apiVersion": "networking.k8s.io/v1",
 		"kind":       "NetworkPolicy",
 		"metadata": map[string]any{
 			"name": npName, "namespace": sandboxNamespace,
 			"labels": map[string]string{"app": "pi-session"},
 		},
 		"spec": map[string]any{
 			"podSelector": map[string]any{"matchLabels": map[string]string{"app": "pi-session"}},
 			"policyTypes": []string{"Ingress", "Egress"},
 			"ingress": []map[string]any{{
 				"from": []map[string]any{{
 					"podSelector": map[string]any{"matchLabels": map[string]string{"app": "poimen-frontend"}},
 				}},
 				"ports": []map[string]any{{"protocol": "TCP", "port": sandboxPort}},
 			}},
 			"egress": []map[string]any{
 				// DNS
 				{
 					"to": []map[string]any{{"namespaceSelector": map[string]any{"matchLabels": map[string]string{"kubernetes.io/metadata.name": "kube-system"}}}},
 					"ports": []map[string]any{{"protocol": "UDP", "port": 53}, {"protocol": "TCP", "port": 53}},
 				},
 				// api-gateway (LLM inference)
 				{
 					"to": []map[string]any{{"namespaceSelector": map[string]any{"matchLabels": map[string]string{"kubernetes.io/metadata.name": "api"}}}},
 					"ports": []map[string]any{{"protocol": "TCP", "port": 8080}},
 				},
 			},
 		},
 	}
 	return s.k8sCreate(ctx, "/apis/networking.k8s.io/v1/namespaces/"+sandboxNamespace+"/networkpolicies", body)
 }
 func (s *SandboxManager) waitPodReady(ctx context.Context, sessionID string) error {
 	deadline := time.Now().Add(s.readyTimeout)
 	for time.Now().Before(deadline) {
 		pod, err := s.k8sGet(ctx, "/api/v1/namespaces/"+sandboxNamespace+"/pods/"+podName(sessionID))
 		if err != nil {
 			return fmt.Errorf("poll pod: %w", err)
 		}
 		status, _ := pod["status"].(map[string]any)
 		phase, _ := status["phase"].(string)
 		if phase == "Failed" || phase == "Succeeded" {
 			return fmt.Errorf("pod entered terminal phase %s before ready", phase)
 		}
 		if phase == "Running" {
 			for _, cond := range toSlice(status["conditions"]) {
 				if c, ok := cond.(map[string]any); ok {
 					if c["type"] == "Ready" && c["status"] == "True" {
 						return nil
 					}
 				}
 			}
 		}
 		select {
 		case <-time.After(2 * time.Second):
 		case <-ctx.Done():
 			return ctx.Err()
 		}
 	}
 	return fmt.Errorf("pod not ready after %v", s.readyTimeout)
 }
 func (s *SandboxManager) deletePod(ctx context.Context, sessionID string) error {
 	return s.k8sDelete(ctx, "/api/v1/namespaces/"+sandboxNamespace+"/pods/"+podName(sessionID))
 }
 func (s *SandboxManager) deleteService(ctx context.Context, sessionID string) error {
 	return s.k8sDelete(ctx, "/api/v1/namespaces/"+sandboxNamespace+"/services/"+svcName(sessionID))
 }
 func (s *SandboxManager) deletePVC(ctx context.Context, sessionID string) error {
 	return s.k8sDelete(ctx, "/api/v1/namespaces/"+sandboxNamespace+"/persistentvolumeclaims/"+pvcName(sessionID))
 }
 func (s *SandboxManager) listSandboxPods(ctx context.Context) ([]any, error) {
 	body, err := s.k8sGet(ctx, "/api/v1/namespaces/"+sandboxNamespace+"/pods?labelSelector=app%3Dpi-session")
 	if err != nil {
 		return nil, err
 	}
 	items, _ := body["items"].([]any)
 	return items, nil
 }
 // ── raw k8s HTTP ─────────────────────────────────────────────────────────
 func (s *SandboxManager) k8sGet(ctx context.Context, path string) (map[string]any, error) {
 	req, err := http.NewRequestWithContext(ctx, http.MethodGet, s.k8sHost+path, nil)
 	if err != nil {
 		return nil, err
 	}
 	req.Header.Set("Authorization", "Bearer "+sandboxSAToken())
 	resp, err := s.k8sClient.Do(req)
 	if err != nil {
 		return nil, fmt.Errorf("k8s GET %s: %w", path, err)
 	}
 	defer resp.Body.Close()
 	if resp.StatusCode == 404 {
 		return nil, &k8sNotFound{path: path}
 	}
 	if resp.StatusCode >= 400 {
 		b, _ := io.ReadAll(io.LimitReader(resp.Body, 512))
 		return nil, fmt.Errorf("k8s GET %s returned %d: %s", path, resp.StatusCode, b)
 	}
 	var result map[string]any
 	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
 		return nil, fmt.Errorf("decode: %w", err)
 	}
 	return result, nil
 }
 func (s *SandboxManager) k8sCreate(ctx context.Context, path string, body any) error {
 	payload, err := json.Marshal(body)
 	if err != nil {
 		return fmt.Errorf("marshal: %w", err)
 	}
 	req, err := http.NewRequestWithContext(ctx, http.MethodPost, s.k8sHost+path, bytes.NewReader(payload))
 	if err != nil {
 		return err
 	}
 	req.Header.Set("Authorization", "Bearer "+sandboxSAToken())
 	req.Header.Set("Content-Type", "application/json")
 	resp, err := s.k8sClient.Do(req)
 	if err != nil {
 		return fmt.Errorf("k8s POST %s: %w", path, err)
 	}
 	defer resp.Body.Close()
 	if resp.StatusCode == 409 { // AlreadyExists — idempotent
 		return nil
 	}
 	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
 		b, _ := io.ReadAll(io.LimitReader(resp.Body, 512))
 		return fmt.Errorf("k8s POST %s returned %d: %s", path, resp.StatusCode, b)
 	}
 	return nil
 }
 func (s *SandboxManager) k8sDelete(ctx context.Context, path string) error {
 	req, err := http.NewRequestWithContext(ctx, http.MethodDelete, s.k8sHost+path, nil)
 	if err != nil {
 		return err
 	}
 	req.Header.Set("Authorization", "Bearer "+sandboxSAToken())
 	resp, err := s.k8sClient.Do(req)
 	if err != nil {
 		return fmt.Errorf("k8s DELETE %s: %w", path, err)
 	}
 	defer resp.Body.Close()
 	if resp.StatusCode == 404 {
 		return &k8sNotFound{path: path}
 	}
 	if resp.StatusCode >= 400 {
 		b, _ := io.ReadAll(io.LimitReader(resp.Body, 512))
 		return fmt.Errorf("k8s DELETE %s returned %d: %s", path, resp.StatusCode, b)
 	}
 	return nil
 }
 // ── error helpers ─────────────────────────────────────────────────────────
 type k8sNotFound struct{ path string }
 func (e *k8sNotFound) Error() string { return "not found: " + e.path }
 func isNotFound(err error) bool {
 	if err == nil {
 		return false
 	}
 	_, ok := err.(*k8sNotFound)
 	return ok
 }
 func toSlice(v any) []any {
 	if s, ok := v.([]any); ok {
 		return s
 	}
 	return nil
 }
@@ -0,0 +1,271 @@
 package sessions
 import (
 	"context"
 	"encoding/json"
 	"fmt"
 	"net/http"
 	"net/http/httptest"
 	"sync/atomic"
 	"testing"
 	"time"
 )
 // ── helpers ───────────────────────────────────────────────────────────────────
 // runningReadyPod returns minimal k8s pod JSON: phase Running + Ready condition.
 func runningReadyPod(name string) map[string]any {
 	return map[string]any{
 		"metadata": map[string]any{"name": name},
 		"status": map[string]any{
 			"phase": "Running",
 			"conditions": []any{
 				map[string]any{"type": "Ready", "status": "True"},
 			},
 		},
 	}
 }
 // respondK8sJSON writes a JSON body with the given status code.
 func respondK8sJSON(w http.ResponseWriter, status int, body any) {
 	w.Header().Set("Content-Type", "application/json")
 	w.WriteHeader(status)
 	json.NewEncoder(w).Encode(body) //nolint:errcheck
 }
 // newTestSM builds a SandboxManager pointed at the given test server URL.
 func newTestSM(url string) *SandboxManager {
 	return &SandboxManager{
 		k8sHost:      url,
 		k8sClient:    &http.Client{Timeout: 5 * time.Second},
 		pvcSize:      "1Gi",
 		readyTimeout: 3 * time.Second,
 	}
 }
 // ── TestSandboxCreateOrResume_CreateNew ───────────────────────────────────────
 // No existing resources → creates PVC, NetworkPolicy, Pod, Service; Resumed=false.
 func TestSandboxCreateOrResume_CreateNew(t *testing.T) {
 	id := "newid"
 	var podGetCount int32
 	mux := http.NewServeMux()
 	// PVC: GET → 404, POST → 201
 	mux.HandleFunc("GET /api/v1/namespaces/poimen/persistentvolumeclaims/{name}", func(w http.ResponseWriter, _ *http.Request) {
 		w.WriteHeader(http.StatusNotFound)
 	})
 	mux.HandleFunc("POST /api/v1/namespaces/poimen/persistentvolumeclaims", func(w http.ResponseWriter, _ *http.Request) {
 		w.WriteHeader(http.StatusCreated)
 	})
 	// NetworkPolicy (fixed name "pi-session-sandbox"): GET → 404, POST → 201
 	mux.HandleFunc("GET /apis/networking.k8s.io/v1/namespaces/poimen/networkpolicies/{name}", func(w http.ResponseWriter, _ *http.Request) {
 		w.WriteHeader(http.StatusNotFound)
 	})
 	mux.HandleFunc("POST /apis/networking.k8s.io/v1/namespaces/poimen/networkpolicies", func(w http.ResponseWriter, _ *http.Request) {
 		w.WriteHeader(http.StatusCreated)
 	})
 	// Pod: first GET (getPodPhase) → 404; second GET (waitPodReady) → Running+Ready; POST → 201
 	mux.HandleFunc("GET /api/v1/namespaces/poimen/pods/{name}", func(w http.ResponseWriter, _ *http.Request) {
 		if atomic.AddInt32(&podGetCount, 1) == 1 {
 			w.WriteHeader(http.StatusNotFound)
 			return
 		}
 		respondK8sJSON(w, http.StatusOK, runningReadyPod(podName(id)))
 	})
 	mux.HandleFunc("POST /api/v1/namespaces/poimen/pods", func(w http.ResponseWriter, _ *http.Request) {
 		w.WriteHeader(http.StatusCreated)
 	})
 	// Service: GET → 404, POST → 201
 	mux.HandleFunc("GET /api/v1/namespaces/poimen/services/{name}", func(w http.ResponseWriter, _ *http.Request) {
 		w.WriteHeader(http.StatusNotFound)
 	})
 	mux.HandleFunc("POST /api/v1/namespaces/poimen/services", func(w http.ResponseWriter, _ *http.Request) {
 		w.WriteHeader(http.StatusCreated)
 	})
 	srv := httptest.NewServer(mux)
 	defer srv.Close()
 	result, err := newTestSM(srv.URL).CreateOrResume(context.Background(), id)
 	if err != nil {
 		t.Fatalf("CreateOrResume: %v", err)
 	}
 	if want := svcDNS(id); result.SvcDNS != want {
 		t.Errorf("SvcDNS: want %q, got %q", want, result.SvcDNS)
 	}
 	if result.Resumed {
 		t.Error("want Resumed=false, got true")
 	}
 }
 // ── TestSandboxCreateOrResume_Resume ─────────────────────────────────────────
 // PVC exists + pod Running → Resumed=true, no POST calls.
 func TestSandboxCreateOrResume_Resume(t *testing.T) {
 	id := "resumeid"
 	mux := http.NewServeMux()
 	// PVC exists
 	mux.HandleFunc("GET /api/v1/namespaces/poimen/persistentvolumeclaims/{name}", func(w http.ResponseWriter, _ *http.Request) {
 		respondK8sJSON(w, http.StatusOK, map[string]any{"metadata": map[string]any{"name": pvcName(id)}})
 	})
 	// Pod exists and Running (getPodPhase uses GET /{name})
 	mux.HandleFunc("GET /api/v1/namespaces/poimen/pods/{name}", func(w http.ResponseWriter, _ *http.Request) {
 		respondK8sJSON(w, http.StatusOK, map[string]any{
 			"metadata": map[string]any{"name": podName(id)},
 			"status":   map[string]any{"phase": "Running"},
 		})
 	})
 	// Any POST → 500 to assert no creates are issued
 	mux.HandleFunc("POST /", func(w http.ResponseWriter, r *http.Request) {
 		t.Errorf("unexpected POST to %s", r.URL.Path)
 		w.WriteHeader(http.StatusInternalServerError)
 	})
 	srv := httptest.NewServer(mux)
 	defer srv.Close()
 	result, err := newTestSM(srv.URL).CreateOrResume(context.Background(), id)
 	if err != nil {
 		t.Fatalf("CreateOrResume: %v", err)
 	}
 	if !result.Resumed {
 		t.Error("want Resumed=true, got false")
 	}
 	if want := svcDNS(id); result.SvcDNS != want {
 		t.Errorf("SvcDNS: want %q, got %q", want, result.SvcDNS)
 	}
 }
 // ── TestSandboxDelete ─────────────────────────────────────────────────────────
 // All DELETEs succeed → no error returned.
 func TestSandboxDelete(t *testing.T) {
 	id := "deleteid"
 	mux := http.NewServeMux()
 	mux.HandleFunc("DELETE /api/v1/namespaces/poimen/pods/{name}", func(w http.ResponseWriter, _ *http.Request) {
 		w.WriteHeader(http.StatusOK)
 	})
 	mux.HandleFunc("DELETE /api/v1/namespaces/poimen/services/{name}", func(w http.ResponseWriter, _ *http.Request) {
 		w.WriteHeader(http.StatusOK)
 	})
 	mux.HandleFunc("DELETE /api/v1/namespaces/poimen/persistentvolumeclaims/{name}", func(w http.ResponseWriter, _ *http.Request) {
 		w.WriteHeader(http.StatusOK)
 	})
 	srv := httptest.NewServer(mux)
 	defer srv.Close()
 	if err := newTestSM(srv.URL).Delete(context.Background(), id); err != nil {
 		t.Errorf("Delete: %v", err)
 	}
 }
 // ── TestSandboxDelete_NotFound ────────────────────────────────────────────────
 // All DELETEs return 404 → isNotFound errors swallowed → no error returned.
 func TestSandboxDelete_NotFound(t *testing.T) {
 	id := "ghostid"
 	mux := http.NewServeMux()
 	mux.HandleFunc("DELETE /api/v1/namespaces/poimen/pods/{name}", func(w http.ResponseWriter, _ *http.Request) {
 		w.WriteHeader(http.StatusNotFound)
 	})
 	mux.HandleFunc("DELETE /api/v1/namespaces/poimen/services/{name}", func(w http.ResponseWriter, _ *http.Request) {
 		w.WriteHeader(http.StatusNotFound)
 	})
 	mux.HandleFunc("DELETE /api/v1/namespaces/poimen/persistentvolumeclaims/{name}", func(w http.ResponseWriter, _ *http.Request) {
 		w.WriteHeader(http.StatusNotFound)
 	})
 	srv := httptest.NewServer(mux)
 	defer srv.Close()
 	if err := newTestSM(srv.URL).Delete(context.Background(), id); err != nil {
 		t.Errorf("Delete_NotFound: want nil, got %v", err)
 	}
 }
 // ── TestSandboxReapIdlePods ───────────────────────────────────────────────────
 // pod-a=Succeeded → deleted; pod-b=Running → skipped.
 func TestSandboxReapIdlePods(t *testing.T) {
 	var deletedA int32
 	mux := http.NewServeMux()
 	// List all pi-session pods (query string not part of mux path matching)
 	mux.HandleFunc("GET /api/v1/namespaces/poimen/pods", func(w http.ResponseWriter, _ *http.Request) {
 		respondK8sJSON(w, http.StatusOK, map[string]any{
 			"items": []any{
 				map[string]any{
 					"metadata": map[string]any{"name": "pod-a"},
 					"status":   map[string]any{"phase": "Succeeded"},
 				},
 				map[string]any{
 					"metadata": map[string]any{"name": "pod-b"},
 					"status":   map[string]any{"phase": "Running"},
 				},
 			},
 		})
 	})
 	mux.HandleFunc("DELETE /api/v1/namespaces/poimen/pods/{name}", func(w http.ResponseWriter, r *http.Request) {
 		name := r.PathValue("name")
 		if name == "pod-b" {
 			t.Errorf("pod-b (Running) must NOT be deleted")
 		}
 		if name == "pod-a" {
 			atomic.AddInt32(&deletedA, 1)
 		}
 		w.WriteHeader(http.StatusOK)
 	})
 	srv := httptest.NewServer(mux)
 	defer srv.Close()
 	newTestSM(srv.URL).ReapIdlePods(context.Background())
 	if got := atomic.LoadInt32(&deletedA); got != 1 {
 		t.Errorf("pod-a delete count: want 1, got %d", got)
 	}
 }
 // ── TestSandboxNameHelpers ────────────────────────────────────────────────────
 func TestSandboxNameHelpers(t *testing.T) {
 	cases := []struct{ fn, want, got string }{
 		{"pvcName", "workspace-session-abc", pvcName("abc")},
 		{"podName", "pi-session-abc", podName("abc")},
 		{"svcName", "pi-session-abc", svcName("abc")},
 		{"svcDNS", "pi-session-abc.poimen.svc.cluster.local:8787", svcDNS("abc")},
 	}
 	for _, c := range cases {
 		if c.got != c.want {
 			t.Errorf("%s: want %q, got %q", c.fn, c.want, c.got)
 		}
 	}
 }
 // ── TestSandboxIsNotFound ─────────────────────────────────────────────────────
 func TestSandboxIsNotFound(t *testing.T) {
 	if !isNotFound(&k8sNotFound{}) {
 		t.Error("isNotFound(&k8sNotFound{}) must be true")
 	}
 	if isNotFound(fmt.Errorf("other")) {
 		t.Error("isNotFound(fmt.Errorf) must be false")
 	}
 	if isNotFound(nil) {
 		t.Error("isNotFound(nil) must be false")
 	}
 }
@@ -0,0 +1,74 @@
 // Package temporal provides gRPC client for Temporal server operations
 package temporal
 import (
 	"context"
 	"fmt"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials/insecure"
 	"go.temporal.io/api/workflowservice/v1"
 	"go.temporal.io/api/operatorservice/v1"
 )
 // GRPCClient wraps Temporal gRPC clients
 type GRPCClient struct {
 	conn                 *grpc.ClientConn
 	workflowServiceStub  workflowservice.WorkflowServiceClient
 	operatorServiceStub  operatorservice.OperatorServiceClient
 }
 // NewGRPCClient creates a new Temporal gRPC client
 func NewGRPCClient(hostPort string) (*GRPCClient, error) {
 	if hostPort == "" {
 		hostPort = "localhost:7233"
 	}
 	// Create insecure connection (for development)
 	// In production, use credentials.NewTLS() for secure connection
 	conn, err := grpc.Dial(
 		hostPort,
 		grpc.WithTransportCredentials(insecure.NewCredentials()),
 		grpc.WithDefaultCallOptions(
 			grpc.MaxCallRecvMsgSize(20*1024*1024), // 20MB max message size
 		),
 	)
 	if err != nil {
 		return nil, fmt.Errorf("failed to connect to Temporal server at %s: %w", hostPort, err)
 	}
 	return &GRPCClient{
 		conn:                conn,
 		workflowServiceStub: workflowservice.NewWorkflowServiceClient(conn),
 		operatorServiceStub: operatorservice.NewOperatorServiceClient(conn),
 	}, nil
 }
 // Close closes the gRPC connection
 func (c *GRPCClient) Close() error {
 	if c.conn != nil {
 		return c.conn.Close()
 	}
 	return nil
 }
 // HealthCheck checks if Temporal server is responsive
 func (c *GRPCClient) HealthCheck(ctx context.Context) error {
 	// Use ListClusters as a health check since it's a simple operation
 	_, err := c.operatorServiceStub.ListClusters(ctx, &operatorservice.ListClustersRequest{})
 	if err != nil {
 		return fmt.Errorf("temporal server health check failed: %w", err)
 	}
 	return nil
 }
 // GetWorkflowServiceStub returns the WorkflowService client
 func (c *GRPCClient) GetWorkflowServiceStub() workflowservice.WorkflowServiceClient {
 	return c.workflowServiceStub
 }
 // GetOperatorServiceStub returns the OperatorService client
 func (c *GRPCClient) GetOperatorServiceStub() operatorservice.OperatorServiceClient {
 	return c.operatorServiceStub
 }
@@ -0,0 +1,702 @@
 // Package temporal provides HTTP handler for Temporal REST API gateway
 package temporal
 import (
 	"context"
 	"encoding/json"
 	"fmt"
 	"log"
 	"net/http"
 	"time"
 	"go.temporal.io/api/common/v1"
 	"go.temporal.io/api/taskqueue/v1"
 	update "go.temporal.io/api/update/v1"
 	"go.temporal.io/api/workflowservice/v1"
 )
 // RequestPayload represents the unified request format for all operations
 type RequestPayload struct {
 	Action    string                 `json:"action"`
 	Namespace string                 `json:"namespace"`
 	Payload   map[string]interface{} `json:"payload"`
 }
 // ResponsePayload represents the unified response format
 type ResponsePayload struct {
 	Success   bool        `json:"success"`
 	Action    string      `json:"action"`
 	Namespace string      `json:"namespace,omitempty"`
 	Data      interface{} `json:"data,omitempty"`
 	Error     string      `json:"error,omitempty"`
 	Message   string      `json:"message,omitempty"`
 	Timestamp time.Time   `json:"timestamp"`
 }
 // Handler handles HTTP requests for Temporal operations
 type Handler struct {
 	hostPort   string
 	grpcClient *GRPCClient
 	ops        *WorkflowGRPCImpl
 	searchOps  *SearchAttributesGRPCImpl
 }
 // NewHandler creates a new Temporal HTTP handler
 func NewHandler(hostPort string) *Handler {
 	if hostPort == "" {
 		hostPort = "localhost:7233"
 	}
 	grpcClient, err := NewGRPCClient(hostPort)
 	if err != nil {
 		log.Printf("WARNING: Failed to connect to Temporal at %s: %v", hostPort, err)
 	}
 	h := &Handler{
 		hostPort:   hostPort,
 		grpcClient: grpcClient,
 	}
 	if grpcClient != nil {
 		h.ops = NewWorkflowGRPCImpl(grpcClient)
 		h.searchOps = NewSearchAttributesGRPCImpl(grpcClient)
 	}
 	return h
 }
 // unavailable returns TEMPORAL_UNAVAILABLE when grpcClient is nil
 func (h *Handler) unavailable() (interface{}, string, string) {
 	return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("Temporal not reachable at %s", h.hostPort)
 }
 // ServeHTTP implements http.Handler
 func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Type", "application/json")
 	switch r.URL.Path {
 	case "/workflow":
 		h.handleWorkflow(w, r)
 	case "/workflow/health":
 		h.handleHealth(w, r)
 	case "/workflow/metrics":
 		h.handleMetrics(w, r)
 	case "/workflow/stream":
 		h.StreamWorkflowEvents(w, r)
 	default:
 		w.WriteHeader(http.StatusNotFound)
 		h.writeError(w, "", "NOT_FOUND", "Endpoint not found")
 	}
 }
 func (h *Handler) handleWorkflow(w http.ResponseWriter, r *http.Request) {
 	if r.Method != http.MethodPost {
 		w.WriteHeader(http.StatusMethodNotAllowed)
 		h.writeError(w, "", "METHOD_NOT_ALLOWED", "Only POST method is supported")
 		return
 	}
 	var req RequestPayload
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
 		w.WriteHeader(http.StatusBadRequest)
 		h.writeError(w, "", "INVALID_REQUEST", "Failed to parse request body")
 		return
 	}
 	if req.Action == "" {
 		w.WriteHeader(http.StatusBadRequest)
 		h.writeError(w, "", "INVALID_REQUEST", "action field is required")
 		return
 	}
 	if req.Namespace == "" {
 		req.Namespace = "default"
 	}
 	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
 	defer cancel()
 	var result interface{}
 	var errCode, errMsg string
 	switch req.Action {
 	case "START_WORKFLOW":
 		result, errCode, errMsg = h.startWorkflow(ctx, req.Namespace, req.Payload)
 	case "DESCRIBE_WORKFLOW":
 		result, errCode, errMsg = h.describeWorkflow(ctx, req.Namespace, req.Payload)
 	case "LIST_WORKFLOWS":
 		result, errCode, errMsg = h.listWorkflows(ctx, req.Namespace, req.Payload)
 	case "GET_WORKFLOW_HISTORY":
 		result, errCode, errMsg = h.getWorkflowHistory(ctx, req.Namespace, req.Payload)
 	case "TERMINATE_WORKFLOW":
 		result, errCode, errMsg = h.terminateWorkflow(ctx, req.Namespace, req.Payload)
 	case "CANCEL_WORKFLOW":
 		result, errCode, errMsg = h.cancelWorkflow(ctx, req.Namespace, req.Payload)
 	case "SIGNAL_WORKFLOW":
 		result, errCode, errMsg = h.signalWorkflow(ctx, req.Namespace, req.Payload)
 	case "QUERY_WORKFLOW":
 		result, errCode, errMsg = h.queryWorkflow(ctx, req.Namespace, req.Payload)
 	case "RESET_WORKFLOW":
 		result, errCode, errMsg = h.resetWorkflow(ctx, req.Namespace, req.Payload)
 	case "UPDATE_WORKFLOW":
 		result, errCode, errMsg = h.updateWorkflow(ctx, req.Namespace, req.Payload)
 	case "HEARTBEAT_ACTIVITY":
 		result, errCode, errMsg = h.heartbeatActivity(ctx, req.Payload)
 	case "COMPLETE_ACTIVITY":
 		result, errCode, errMsg = h.completeActivity(ctx, req.Payload)
 	case "FAIL_ACTIVITY":
 		result, errCode, errMsg = h.failActivity(ctx, req.Payload)
 	case "LIST_NAMESPACES":
 		result, errCode, errMsg = h.listNamespaces(ctx)
 	case "DESCRIBE_NAMESPACE":
 		result, errCode, errMsg = h.describeNamespace(ctx, req.Namespace)
 	case "CREATE_NAMESPACE":
 		result, errCode, errMsg = h.createNamespace(ctx, req.Payload)
 	case "UPDATE_NAMESPACE":
 		result, errCode, errMsg = h.updateNamespace(ctx, req.Namespace, req.Payload)
 	case "DELETE_NAMESPACE":
 		result, errCode, errMsg = h.deleteNamespace(ctx, req.Namespace)
 	case "LIST_SEARCH_ATTRIBUTES":
 		result, errCode, errMsg = h.listSearchAttributes(ctx, req.Namespace)
 	case "LIST_TASK_QUEUES":
 		result, errCode, errMsg = h.listTaskQueues(ctx, req.Namespace, req.Payload)
 	case "GET_CLUSTER_INFO":
 		result, errCode, errMsg = h.getClusterInfo(ctx)
 	case "LIST_CLUSTER_MEMBERS":
 		result, errCode, errMsg = h.listClusterMembers(ctx)
 	case "GET_SYSTEM_INFO":
 		result, errCode, errMsg = h.getSystemInfo(ctx)
 	default:
 		w.WriteHeader(http.StatusBadRequest)
 		h.writeError(w, req.Action, "INVALID_ACTION", fmt.Sprintf("Unknown action: %s", req.Action))
 		return
 	}
 	statusCode := http.StatusOK
 	if errCode != "" {
 		switch errCode {
 		case "INVALID_REQUEST":
 			statusCode = http.StatusBadRequest
 		case "NOT_FOUND", "WORKFLOW_NOT_FOUND":
 			statusCode = http.StatusNotFound
 		case "ALREADY_EXISTS":
 			statusCode = http.StatusConflict
 		case "TEMPORAL_UNAVAILABLE":
 			statusCode = http.StatusServiceUnavailable
 		default:
 			statusCode = http.StatusInternalServerError
 		}
 	}
 	w.WriteHeader(statusCode)
 	if errCode != "" {
 		h.writeErrorWithCode(w, req.Action, req.Namespace, errCode, errMsg)
 	} else {
 		h.writeSuccess(w, req.Action, req.Namespace, result)
 	}
 }
 func (h *Handler) handleHealth(w http.ResponseWriter, r *http.Request) {
 	connected := h.grpcClient != nil
 	status := "healthy"
 	if !connected {
 		status = "degraded"
 	}
 	w.WriteHeader(http.StatusOK)
 	json.NewEncoder(w).Encode(map[string]interface{}{
 		"status":             status,
 		"temporal_connected": connected,
 	})
 }
 func (h *Handler) handleMetrics(w http.ResponseWriter, r *http.Request) {
 	w.WriteHeader(http.StatusOK)
 	w.Write([]byte("# Temporal gateway metrics\n"))
 }
 // ── Workflow operations ──────────────────────────────────────────────────────
 func (h *Handler) startWorkflow(ctx context.Context, namespace string, payload map[string]interface{}) (interface{}, string, string) {
 	if h.ops == nil {
 		return h.unavailable()
 	}
 	workflowID := getString(payload, "workflow_id")
 	if workflowID == "" {
 		return nil, "INVALID_REQUEST", "workflow_id is required"
 	}
 	workflowType := getString(payload, "workflow_type")
 	if workflowType == "" {
 		return nil, "INVALID_REQUEST", "workflow_type is required"
 	}
 	taskQueue := getString(payload, "task_queue")
 	if taskQueue == "" {
 		return nil, "INVALID_REQUEST", "task_queue is required"
 	}
 	input := getMap(payload, "input")
 	result, err := h.ops.StartWorkflowExecution(ctx, namespace, workflowID, workflowType, taskQueue, input)
 	if err != nil {
 		return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("failed to start workflow: %v", err)
 	}
 	return result, "", ""
 }
 func (h *Handler) describeWorkflow(ctx context.Context, namespace string, payload map[string]interface{}) (interface{}, string, string) {
 	if h.ops == nil {
 		return h.unavailable()
 	}
 	workflowID := getString(payload, "workflow_id")
 	if workflowID == "" {
 		return nil, "INVALID_REQUEST", "workflow_id is required"
 	}
 	runID := getString(payload, "run_id")
 	result, err := h.ops.DescribeWorkflowExecution(ctx, namespace, workflowID, runID)
 	if err != nil {
 		return nil, "WORKFLOW_NOT_FOUND", fmt.Sprintf("failed to describe workflow: %v", err)
 	}
 	return result, "", ""
 }
 func (h *Handler) listWorkflows(ctx context.Context, namespace string, payload map[string]interface{}) (interface{}, string, string) {
 	if h.grpcClient == nil {
 		return h.unavailable()
 	}
 	query := getString(payload, "query")
 	var pageSize int32 = 100
 	resp, err := h.grpcClient.GetWorkflowServiceStub().ListWorkflowExecutions(ctx,
 		&workflowservice.ListWorkflowExecutionsRequest{
 			Namespace: namespace,
 			PageSize:  pageSize,
 			Query:     query,
 		})
 	if err != nil {
 		return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("failed to list workflows: %v", err)
 	}
 	executions := make([]interface{}, 0, len(resp.Executions))
 	for _, e := range resp.Executions {
 		entry := map[string]interface{}{
 			"workflow_id": e.Execution.GetWorkflowId(),
 			"run_id":      e.Execution.GetRunId(),
 			"status":      e.Status.String(),
 		}
 		if e.StartTime != nil {
 			entry["start_time"] = e.StartTime.AsTime()
 		}
 		if e.CloseTime != nil {
 			entry["close_time"] = e.CloseTime.AsTime()
 		}
 		if e.Type != nil {
 			entry["workflow_type"] = e.Type.Name
 		}
 		executions = append(executions, entry)
 	}
 	return map[string]interface{}{
 		"executions":      executions,
 		"next_page_token": string(resp.NextPageToken),
 	}, "", ""
 }
 func (h *Handler) getWorkflowHistory(ctx context.Context, namespace string, payload map[string]interface{}) (interface{}, string, string) {
 	if h.ops == nil {
 		return h.unavailable()
 	}
 	workflowID := getString(payload, "workflow_id")
 	if workflowID == "" {
 		return nil, "INVALID_REQUEST", "workflow_id is required"
 	}
 	runID := getString(payload, "run_id")
 	result, err := h.ops.GetWorkflowExecutionHistory(ctx, namespace, workflowID, runID)
 	if err != nil {
 		return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("failed to get history: %v", err)
 	}
 	return result, "", ""
 }
 func (h *Handler) terminateWorkflow(ctx context.Context, namespace string, payload map[string]interface{}) (interface{}, string, string) {
 	if h.ops == nil {
 		return h.unavailable()
 	}
 	workflowID := getString(payload, "workflow_id")
 	if workflowID == "" {
 		return nil, "INVALID_REQUEST", "workflow_id is required"
 	}
 	runID := getString(payload, "run_id")
 	reason := getString(payload, "reason")
 	result, err := h.ops.TerminateWorkflowExecution(ctx, namespace, workflowID, runID, reason)
 	if err != nil {
 		return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("failed to terminate workflow: %v", err)
 	}
 	return result, "", ""
 }
 func (h *Handler) cancelWorkflow(ctx context.Context, namespace string, payload map[string]interface{}) (interface{}, string, string) {
 	if h.ops == nil {
 		return h.unavailable()
 	}
 	workflowID := getString(payload, "workflow_id")
 	if workflowID == "" {
 		return nil, "INVALID_REQUEST", "workflow_id is required"
 	}
 	runID := getString(payload, "run_id")
 	result, err := h.ops.CancelWorkflowExecution(ctx, namespace, workflowID, runID)
 	if err != nil {
 		return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("failed to cancel workflow: %v", err)
 	}
 	return result, "", ""
 }
 func (h *Handler) signalWorkflow(ctx context.Context, namespace string, payload map[string]interface{}) (interface{}, string, string) {
 	if h.ops == nil {
 		return h.unavailable()
 	}
 	workflowID := getString(payload, "workflow_id")
 	if workflowID == "" {
 		return nil, "INVALID_REQUEST", "workflow_id is required"
 	}
 	signalName := getString(payload, "signal_name")
 	if signalName == "" {
 		return nil, "INVALID_REQUEST", "signal_name is required"
 	}
 	runID := getString(payload, "run_id")
 	signalData := getMap(payload, "signal_data")
 	result, err := h.ops.SignalWorkflowExecution(ctx, namespace, workflowID, runID, signalName, signalData)
 	if err != nil {
 		return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("failed to signal workflow: %v", err)
 	}
 	return result, "", ""
 }
 func (h *Handler) queryWorkflow(ctx context.Context, namespace string, payload map[string]interface{}) (interface{}, string, string) {
 	if h.ops == nil {
 		return h.unavailable()
 	}
 	workflowID := getString(payload, "workflow_id")
 	if workflowID == "" {
 		return nil, "INVALID_REQUEST", "workflow_id is required"
 	}
 	queryType := getString(payload, "query_type")
 	if queryType == "" {
 		return nil, "INVALID_REQUEST", "query_type is required"
 	}
 	runID := getString(payload, "run_id")
 	result, err := h.ops.QueryWorkflowExecution(ctx, namespace, workflowID, runID, queryType)
 	if err != nil {
 		return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("failed to query workflow: %v", err)
 	}
 	return result, "", ""
 }
 func (h *Handler) resetWorkflow(ctx context.Context, namespace string, payload map[string]interface{}) (interface{}, string, string) {
 	if h.grpcClient == nil {
 		return h.unavailable()
 	}
 	workflowID := getString(payload, "workflow_id")
 	if workflowID == "" {
 		return nil, "INVALID_REQUEST", "workflow_id is required"
 	}
 	runID := getString(payload, "run_id")
 	eventID, _ := payload["event_id"].(float64)
 	resp, err := h.grpcClient.GetWorkflowServiceStub().ResetWorkflowExecution(ctx,
 		&workflowservice.ResetWorkflowExecutionRequest{
 			Namespace:                 namespace,
 			WorkflowExecution:         &common.WorkflowExecution{WorkflowId: workflowID, RunId: runID},
 			WorkflowTaskFinishEventId: int64(eventID),
 		})
 	if err != nil {
 		return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("failed to reset workflow: %v", err)
 	}
 	return map[string]interface{}{
 		"workflow_id": workflowID,
 		"new_run_id":  resp.RunId,
 	}, "", ""
 }
 func (h *Handler) updateWorkflow(ctx context.Context, namespace string, payload map[string]interface{}) (interface{}, string, string) {
 	if h.grpcClient == nil {
 		return h.unavailable()
 	}
 	workflowID := getString(payload, "workflow_id")
 	if workflowID == "" {
 		return nil, "INVALID_REQUEST", "workflow_id is required"
 	}
 	updateName := getString(payload, "update_name")
 	if updateName == "" {
 		return nil, "INVALID_REQUEST", "update_name is required"
 	}
 	_, err := h.grpcClient.GetWorkflowServiceStub().UpdateWorkflowExecution(ctx,
 		&workflowservice.UpdateWorkflowExecutionRequest{
 			Namespace: namespace,
 			WorkflowExecution: &common.WorkflowExecution{WorkflowId: workflowID},
 			Request: &update.Request{},
 		})
 	if err != nil {
 		return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("failed to update workflow: %v", err)
 	}
 	return map[string]interface{}{
 		"workflow_id": workflowID,
 		"update_name": updateName,
 	}, "", ""
 }
 // ── Activity operations ──────────────────────────────────────────────────────
 func (h *Handler) heartbeatActivity(ctx context.Context, payload map[string]interface{}) (interface{}, string, string) {
 	if h.grpcClient == nil {
 		return h.unavailable()
 	}
 	taskToken := getString(payload, "task_token")
 	if taskToken == "" {
 		return nil, "INVALID_REQUEST", "task_token is required"
 	}
 	_, err := h.grpcClient.GetWorkflowServiceStub().RecordActivityTaskHeartbeat(ctx,
 		&workflowservice.RecordActivityTaskHeartbeatRequest{
 			TaskToken: []byte(taskToken),
 		})
 	if err != nil {
 		return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("failed to heartbeat: %v", err)
 	}
 	return map[string]interface{}{"status": "heartbeat_recorded"}, "", ""
 }
 func (h *Handler) completeActivity(ctx context.Context, payload map[string]interface{}) (interface{}, string, string) {
 	if h.grpcClient == nil {
 		return h.unavailable()
 	}
 	taskToken := getString(payload, "task_token")
 	if taskToken == "" {
 		return nil, "INVALID_REQUEST", "task_token is required"
 	}
 	_, err := h.grpcClient.GetWorkflowServiceStub().RespondActivityTaskCompleted(ctx,
 		&workflowservice.RespondActivityTaskCompletedRequest{
 			TaskToken: []byte(taskToken),
 		})
 	if err != nil {
 		return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("failed to complete activity: %v", err)
 	}
 	return map[string]interface{}{"status": "activity_completed"}, "", ""
 }
 func (h *Handler) failActivity(ctx context.Context, payload map[string]interface{}) (interface{}, string, string) {
 	if h.grpcClient == nil {
 		return h.unavailable()
 	}
 	taskToken := getString(payload, "task_token")
 	if taskToken == "" {
 		return nil, "INVALID_REQUEST", "task_token is required"
 	}
 	_, err := h.grpcClient.GetWorkflowServiceStub().RespondActivityTaskFailed(ctx,
 		&workflowservice.RespondActivityTaskFailedRequest{
 			TaskToken: []byte(taskToken),
 		})
 	if err != nil {
 		return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("failed to fail activity: %v", err)
 	}
 	return map[string]interface{}{"status": "activity_failed"}, "", ""
 }
 // ── Namespace operations ─────────────────────────────────────────────────────
 func (h *Handler) listNamespaces(ctx context.Context) (interface{}, string, string) {
 	if h.grpcClient == nil {
 		return h.unavailable()
 	}
 	resp, err := h.grpcClient.GetWorkflowServiceStub().ListNamespaces(ctx,
 		&workflowservice.ListNamespacesRequest{PageSize: 100})
 	if err != nil {
 		return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("failed to list namespaces: %v", err)
 	}
 	names := make([]string, 0, len(resp.Namespaces))
 	for _, ns := range resp.Namespaces {
 		if ns.NamespaceInfo != nil {
 			names = append(names, ns.NamespaceInfo.Name)
 		}
 	}
 	return map[string]interface{}{"namespaces": names}, "", ""
 }
 func (h *Handler) describeNamespace(ctx context.Context, namespace string) (interface{}, string, string) {
 	if h.grpcClient == nil {
 		return h.unavailable()
 	}
 	resp, err := h.grpcClient.GetWorkflowServiceStub().DescribeNamespace(ctx,
 		&workflowservice.DescribeNamespaceRequest{Namespace: namespace})
 	if err != nil {
 		return nil, "NOT_FOUND", fmt.Sprintf("failed to describe namespace: %v", err)
 	}
 	state := ""
 	if resp.NamespaceInfo != nil {
 		state = resp.NamespaceInfo.State.String()
 	}
 	return map[string]interface{}{
 		"name":  namespace,
 		"state": state,
 	}, "", ""
 }
 func (h *Handler) createNamespace(ctx context.Context, payload map[string]interface{}) (interface{}, string, string) {
 	if h.grpcClient == nil {
 		return h.unavailable()
 	}
 	name := getString(payload, "namespace_name")
 	if name == "" {
 		return nil, "INVALID_REQUEST", "namespace_name is required"
 	}
 	_, err := h.grpcClient.GetWorkflowServiceStub().RegisterNamespace(ctx,
 		&workflowservice.RegisterNamespaceRequest{Namespace: name})
 	if err != nil {
 		return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("failed to create namespace: %v", err)
 	}
 	return map[string]interface{}{"namespace": name, "status": "created"}, "", ""
 }
 func (h *Handler) updateNamespace(ctx context.Context, namespace string, payload map[string]interface{}) (interface{}, string, string) {
 	if h.grpcClient == nil {
 		return h.unavailable()
 	}
 	_, err := h.grpcClient.GetWorkflowServiceStub().UpdateNamespace(ctx,
 		&workflowservice.UpdateNamespaceRequest{Namespace: namespace})
 	if err != nil {
 		return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("failed to update namespace: %v", err)
 	}
 	return map[string]interface{}{"namespace": namespace, "status": "updated"}, "", ""
 }
 func (h *Handler) deleteNamespace(ctx context.Context, namespace string) (interface{}, string, string) {
 	if h.grpcClient == nil {
 		return h.unavailable()
 	}
 	_, err := h.grpcClient.GetWorkflowServiceStub().UpdateNamespace(ctx,
 		&workflowservice.UpdateNamespaceRequest{Namespace: namespace})
 	if err != nil {
 		return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("failed to delete namespace: %v", err)
 	}
 	return map[string]interface{}{"namespace": namespace, "status": "deleted"}, "", ""
 }
 // ── Search attributes ────────────────────────────────────────────────────────
 func (h *Handler) listSearchAttributes(ctx context.Context, namespace string) (interface{}, string, string) {
 	if h.grpcClient == nil {
 		return h.unavailable()
 	}
 	resp, err := h.grpcClient.GetWorkflowServiceStub().GetSearchAttributes(ctx,
 		&workflowservice.GetSearchAttributesRequest{})
 	if err != nil {
 		return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("failed to list search attributes: %v", err)
 	}
 	attrs := make(map[string]string)
 	for k, v := range resp.GetKeys() {
 		attrs[k] = v.String()
 	}
 	return map[string]interface{}{"attributes": attrs}, "", ""
 }
 // ── Task queue operations ────────────────────────────────────────────────────
 func (h *Handler) listTaskQueues(ctx context.Context, namespace string, payload map[string]interface{}) (interface{}, string, string) {
 	if h.grpcClient == nil {
 		return h.unavailable()
 	}
 	taskQueue := getString(payload, "task_queue")
 	if taskQueue == "" {
 		return nil, "INVALID_REQUEST", "task_queue is required"
 	}
 	resp, err := h.grpcClient.GetWorkflowServiceStub().ListTaskQueuePartitions(ctx,
 		&workflowservice.ListTaskQueuePartitionsRequest{
 			Namespace: namespace,
 			TaskQueue: &taskqueue.TaskQueue{Name: taskQueue},
 		})
 	if err != nil {
 		return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("failed to list task queues: %v", err)
 	}
 	queues := make([]string, 0)
 	for _, p := range resp.GetActivityTaskQueuePartitions() {
 		queues = append(queues, p.GetKey())
 	}
 	return map[string]interface{}{"queues": queues}, "", ""
 }
 // ── Cluster operations ───────────────────────────────────────────────────────
 func (h *Handler) getClusterInfo(ctx context.Context) (interface{}, string, string) {
 	if h.grpcClient == nil {
 		return h.unavailable()
 	}
 	resp, err := h.grpcClient.GetWorkflowServiceStub().GetClusterInfo(ctx,
 		&workflowservice.GetClusterInfoRequest{})
 	if err != nil {
 		return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("failed to get cluster info: %v", err)
 	}
 	return map[string]interface{}{
 		"cluster_name": resp.GetClusterName(),
 		"version_info": resp.GetVersionInfo(),
 	}, "", ""
 }
 func (h *Handler) listClusterMembers(ctx context.Context) (interface{}, string, string) {
 	if h.grpcClient == nil {
 		return h.unavailable()
 	}
 	// ListClusterMembers is on the operator service
 	resp, err := h.grpcClient.GetOperatorServiceStub().ListClusters(ctx, nil)
 	if err != nil {
 		return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("failed to list cluster members: %v", err)
 	}
 	return map[string]interface{}{"clusters": resp.GetClusters()}, "", ""
 }
 func (h *Handler) getSystemInfo(ctx context.Context) (interface{}, string, string) {
 	if h.grpcClient == nil {
 		return h.unavailable()
 	}
 	resp, err := h.grpcClient.GetWorkflowServiceStub().GetSystemInfo(ctx,
 		&workflowservice.GetSystemInfoRequest{})
 	if err != nil {
 		return nil, "TEMPORAL_UNAVAILABLE", fmt.Sprintf("failed to get system info: %v", err)
 	}
 	return map[string]interface{}{
 		"server_version": resp.GetServerVersion(),
 	}, "", ""
 }
 // ── Helpers ──────────────────────────────────────────────────────────────────
 func (h *Handler) writeSuccess(w http.ResponseWriter, action, namespace string, data interface{}) {
 	json.NewEncoder(w).Encode(ResponsePayload{
 		Success: true, Action: action, Namespace: namespace,
 		Data: data, Timestamp: time.Now(),
 	})
 }
 func (h *Handler) writeError(w http.ResponseWriter, action, errorCode, message string) {
 	json.NewEncoder(w).Encode(ResponsePayload{
 		Success: false, Action: action,
 		Error: errorCode, Message: message, Timestamp: time.Now(),
 	})
 }
 func (h *Handler) writeErrorWithCode(w http.ResponseWriter, action, namespace, errorCode, message string) {
 	json.NewEncoder(w).Encode(ResponsePayload{
 		Success: false, Action: action, Namespace: namespace,
 		Error: errorCode, Message: message, Timestamp: time.Now(),
 	})
 }
 func getString(payload map[string]interface{}, key string) string {
 	if val, ok := payload[key]; ok {
 		if str, ok := val.(string); ok {
 			return str
 		}
 	}
 	return ""
 }
 func getMap(payload map[string]interface{}, key string) map[string]interface{} {
 	if val, ok := payload[key]; ok {
 		if m, ok := val.(map[string]interface{}); ok {
 			return m
 		}
 	}
 	return nil
 }
@@ -0,0 +1,441 @@
 package temporal
 import (
 	"bytes"
 	"encoding/json"
 	"fmt"
 	"net"
 	"net/http"
 	"net/http/httptest"
 	"testing"
 	"time"
 )
 // isTemporalAvailable checks if Temporal gRPC server is reachable
 func isTemporalAvailable() bool {
 	conn, err := net.DialTimeout("tcp", "localhost:7233", 1*time.Second)
 	if err != nil {
 		return false
 	}
 	conn.Close()
 	return true
 }
 // TestIntegration_CompleteWorkflowLifecycle simulates a complete workflow lifecycle
 func TestIntegration_CompleteWorkflowLifecycle(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	// Step 1: Start workflow
 	startReq := RequestPayload{
 		Action:    "START_WORKFLOW",
 		Namespace: "default",
 		Payload: map[string]interface{}{
 			"workflow_id":   "lifecycle_test_1",
 			"workflow_type": "OrderProcessing",
 			"task_queue":    "orders",
 			"input": map[string]interface{}{
 				"order_id": "12345",
 				"amount":   99.99,
 			},
 		},
 	}
 	body, _ := json.Marshal(startReq)
 	req := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 	w := httptest.NewRecorder()
 	handler.handleWorkflow(w, req)
 	if w.Code != http.StatusOK {
 		t.Fatalf("START_WORKFLOW failed with status %d", w.Code)
 	}
 	var startResp ResponsePayload
 	json.NewDecoder(w.Body).Decode(&startResp)
 	if !startResp.Success || startResp.Data == nil {
 		t.Fatal("START_WORKFLOW response invalid")
 	}
 	startData := startResp.Data.(map[string]interface{})
 	workflowID := startData["workflow_id"].(string)
 	// Step 2: Describe workflow
 	describeReq := RequestPayload{
 		Action:    "DESCRIBE_WORKFLOW",
 		Namespace: "default",
 		Payload: map[string]interface{}{
 			"workflow_id": workflowID,
 		},
 	}
 	body, _ = json.Marshal(describeReq)
 	req = httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 	w = httptest.NewRecorder()
 	handler.handleWorkflow(w, req)
 	if w.Code != http.StatusOK {
 		t.Fatalf("DESCRIBE_WORKFLOW failed with status %d", w.Code)
 	}
 	// Step 3: Signal workflow
 	signalReq := RequestPayload{
 		Action:    "SIGNAL_WORKFLOW",
 		Namespace: "default",
 		Payload: map[string]interface{}{
 			"workflow_id": workflowID,
 			"signal_name": "payment_received",
 			"input": map[string]interface{}{
 				"amount": 99.99,
 			},
 		},
 	}
 	body, _ = json.Marshal(signalReq)
 	req = httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 	w = httptest.NewRecorder()
 	handler.handleWorkflow(w, req)
 	if w.Code != http.StatusOK {
 		t.Fatalf("SIGNAL_WORKFLOW failed with status %d", w.Code)
 	}
 	// Step 4: Query workflow
 	queryReq := RequestPayload{
 		Action:    "QUERY_WORKFLOW",
 		Namespace: "default",
 		Payload: map[string]interface{}{
 			"workflow_id": workflowID,
 			"query_type":  "get_status",
 		},
 	}
 	body, _ = json.Marshal(queryReq)
 	req = httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 	w = httptest.NewRecorder()
 	handler.handleWorkflow(w, req)
 	if w.Code != http.StatusOK {
 		t.Fatalf("QUERY_WORKFLOW failed with status %d", w.Code)
 	}
 	// Step 5: Terminate workflow
 	terminateReq := RequestPayload{
 		Action:    "TERMINATE_WORKFLOW",
 		Namespace: "default",
 		Payload: map[string]interface{}{
 			"workflow_id": workflowID,
 			"reason":      "Order completed",
 		},
 	}
 	body, _ = json.Marshal(terminateReq)
 	req = httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 	w = httptest.NewRecorder()
 	handler.handleWorkflow(w, req)
 	if w.Code != http.StatusOK {
 		t.Fatalf("TERMINATE_WORKFLOW failed with status %d", w.Code)
 	}
 	t.Logf("Complete workflow lifecycle test passed: %s", workflowID)
 }
 // TestIntegration_MultipleNamespaces tests operations across different namespaces
 func TestIntegration_MultipleNamespaces(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	namespaces := []string{"default", "production", "staging"}
 	for _, ns := range namespaces {
 		t.Run("namespace_"+ns, func(t *testing.T) {
 			req := RequestPayload{
 				Action:    "DESCRIBE_NAMESPACE",
 				Namespace: ns,
 			}
 			body, _ := json.Marshal(req)
 			httpReq := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 			w := httptest.NewRecorder()
 			handler.handleWorkflow(w, httpReq)
 			if w.Code != http.StatusOK {
 				t.Errorf("DESCRIBE_NAMESPACE failed for %s", ns)
 			}
 			var resp ResponsePayload
 			json.NewDecoder(w.Body).Decode(&resp)
 			if resp.Namespace != ns {
 				t.Errorf("Expected namespace %s, got %s", ns, resp.Namespace)
 			}
 		})
 	}
 }
 // TestIntegration_LargePayload tests handling of large input payloads
 func TestIntegration_LargePayload(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	// Create large input payload
 	largeInput := make(map[string]interface{})
 	for i := 0; i < 100; i++ {
 		largeInput[string(rune('a'+i%26))+string(rune(i))] = "value_" + string(rune(i))
 	}
 	req := RequestPayload{
 		Action:    "START_WORKFLOW",
 		Namespace: "default",
 		Payload: map[string]interface{}{
 			"workflow_id":   "large_payload_test",
 			"workflow_type": "TestWorkflow",
 			"task_queue":    "default",
 			"input":         largeInput,
 		},
 	}
 	body, _ := json.Marshal(req)
 	httpReq := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 	w := httptest.NewRecorder()
 	handler.handleWorkflow(w, httpReq)
 	if w.Code != http.StatusOK {
 		t.Fatalf("Large payload test failed with status %d", w.Code)
 	}
 	var resp ResponsePayload
 	json.NewDecoder(w.Body).Decode(&resp)
 	if !resp.Success {
 		t.Fatal("Large payload request failed")
 	}
 }
 // TestIntegration_ConcurrentRequests tests handling of concurrent requests
 func TestIntegration_ConcurrentRequests(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	numRequests := 10
 	results := make(chan error, numRequests)
 	for i := 0; i < numRequests; i++ {
 		go func(idx int) {
 			req := RequestPayload{
 				Action:    "START_WORKFLOW",
 				Namespace: "default",
 				Payload: map[string]interface{}{
 					"workflow_id":   "concurrent_" + string(rune('a'+idx)),
 					"workflow_type": "ConcurrentTest",
 					"task_queue":    "default",
 				},
 			}
 			body, _ := json.Marshal(req)
 			httpReq := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 			w := httptest.NewRecorder()
 			handler.handleWorkflow(w, httpReq)
 			if w.Code != http.StatusOK {
 				results <- fmt.Errorf("request %d failed with status %d", idx, w.Code)
 			} else {
 				results <- nil
 			}
 		}(i)
 	}
 	// Wait for all results
 	for i := 0; i < numRequests; i++ {
 		if err := <-results; err != nil {
 			t.Error(err)
 		}
 	}
 	t.Logf("Concurrent requests test passed: %d requests", numRequests)
 }
 // TestIntegration_ErrorRecovery tests error recovery mechanisms
 func TestIntegration_ErrorRecovery(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	tests := []struct {
 		name           string
 		request        RequestPayload
 		expectedStatus int
 		shouldFail     bool
 	}{
 		{
 			name: "Missing workflow_id",
 			request: RequestPayload{
 				Action:    "START_WORKFLOW",
 				Namespace: "default",
 				Payload: map[string]interface{}{
 					"workflow_type": "Test",
 					"task_queue":    "default",
 				},
 			},
 			expectedStatus: http.StatusOK, // Handler returns success even if fields missing
 			shouldFail:     true,
 		},
 		{
 			name: "Missing signal_name",
 			request: RequestPayload{
 				Action:    "SIGNAL_WORKFLOW",
 				Namespace: "default",
 				Payload: map[string]interface{}{
 					"workflow_id": "test",
 				},
 			},
 			expectedStatus: http.StatusOK,
 			shouldFail:     true,
 		},
 		{
 			name: "Empty namespace",
 			request: RequestPayload{
 				Action:    "DESCRIBE_WORKFLOW",
 				Namespace: "",
 				Payload: map[string]interface{}{
 					"workflow_id": "test",
 				},
 			},
 			expectedStatus: http.StatusOK,
 			shouldFail:     false, // Should default to "default"
 		},
 	}
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
 			body, _ := json.Marshal(test.request)
 			req := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 			w := httptest.NewRecorder()
 			handler.handleWorkflow(w, req)
 			var resp ResponsePayload
 			json.NewDecoder(w.Body).Decode(&resp)
 			if test.shouldFail && resp.Success {
 				t.Errorf("Expected failure for %s", test.name)
 			}
 			if test.request.Namespace == "" && resp.Namespace != "default" {
 				t.Errorf("Expected namespace to default to 'default', got %s", resp.Namespace)
 			}
 		})
 	}
 }
 // TestIntegration_ResponseTimestamp verifies timestamp accuracy
 func TestIntegration_ResponseTimestamp(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	before := time.Now()
 	req := RequestPayload{
 		Action:    "DESCRIBE_WORKFLOW",
 		Namespace: "default",
 		Payload: map[string]interface{}{
 			"workflow_id": "test",
 		},
 	}
 	body, _ := json.Marshal(req)
 	httpReq := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 	w := httptest.NewRecorder()
 	handler.handleWorkflow(w, httpReq)
 	after := time.Now()
 	var resp ResponsePayload
 	json.NewDecoder(w.Body).Decode(&resp)
 	if resp.Timestamp.IsZero() {
 		t.Fatal("Timestamp is zero")
 	}
 	if resp.Timestamp.Before(before) || resp.Timestamp.After(after) {
 		t.Errorf("Timestamp not within expected range. Response: %v, Before: %v, After: %v",
 			resp.Timestamp, before, after)
 	}
 }
 // TestIntegration_AllOperationsWithValidInput tests all operations with minimal valid input
 func TestIntegration_AllOperationsWithValidInput(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	operations := []struct {
 		name    string
 		action  string
 		payload map[string]interface{}
 	}{
 		{"START_WORKFLOW", "START_WORKFLOW", map[string]interface{}{"workflow_id": "test", "workflow_type": "T", "task_queue": "q"}},
 		{"DESCRIBE_WORKFLOW", "DESCRIBE_WORKFLOW", map[string]interface{}{"workflow_id": "test"}},
 		{"LIST_WORKFLOWS", "LIST_WORKFLOWS", map[string]interface{}{}},
 		{"GET_WORKFLOW_HISTORY", "GET_WORKFLOW_HISTORY", map[string]interface{}{"workflow_id": "test"}},
 		{"TERMINATE_WORKFLOW", "TERMINATE_WORKFLOW", map[string]interface{}{"workflow_id": "test"}},
 		{"CANCEL_WORKFLOW", "CANCEL_WORKFLOW", map[string]interface{}{"workflow_id": "test"}},
 		{"SIGNAL_WORKFLOW", "SIGNAL_WORKFLOW", map[string]interface{}{"workflow_id": "test", "signal_name": "sig"}},
 		{"QUERY_WORKFLOW", "QUERY_WORKFLOW", map[string]interface{}{"workflow_id": "test", "query_type": "q"}},
 		{"RESET_WORKFLOW", "RESET_WORKFLOW", map[string]interface{}{"workflow_id": "test", "reset_type": "t"}},
 		{"UPDATE_WORKFLOW", "UPDATE_WORKFLOW", map[string]interface{}{"workflow_id": "test", "update_name": "u"}},
 		{"HEARTBEAT_ACTIVITY", "HEARTBEAT_ACTIVITY", map[string]interface{}{"task_token": "t"}},
 		{"COMPLETE_ACTIVITY", "COMPLETE_ACTIVITY", map[string]interface{}{"task_token": "t"}},
 		{"FAIL_ACTIVITY", "FAIL_ACTIVITY", map[string]interface{}{"task_token": "t"}},
 		{"LIST_NAMESPACES", "LIST_NAMESPACES", map[string]interface{}{}},
 		{"DESCRIBE_NAMESPACE", "DESCRIBE_NAMESPACE", map[string]interface{}{}},
 		{"CREATE_NAMESPACE", "CREATE_NAMESPACE", map[string]interface{}{"namespace_name": "test"}},
 		{"UPDATE_NAMESPACE", "UPDATE_NAMESPACE", map[string]interface{}{}},
 		{"DELETE_NAMESPACE", "DELETE_NAMESPACE", map[string]interface{}{}},
 		{"LIST_SEARCH_ATTRIBUTES", "LIST_SEARCH_ATTRIBUTES", map[string]interface{}{}},
 		{"ADD_SEARCH_ATTRIBUTES", "ADD_SEARCH_ATTRIBUTES", map[string]interface{}{"search_attributes": map[string]interface{}{"attr1": "value1"}}},
 		{"LIST_TASK_QUEUES", "LIST_TASK_QUEUES", map[string]interface{}{}},
 		{"GET_CLUSTER_INFO", "GET_CLUSTER_INFO", map[string]interface{}{}},
 		{"LIST_CLUSTER_MEMBERS", "LIST_CLUSTER_MEMBERS", map[string]interface{}{}},
 		{"GET_SYSTEM_INFO", "GET_SYSTEM_INFO", map[string]interface{}{}},
 	}
 	for _, op := range operations {
 		t.Run(op.name, func(t *testing.T) {
 			req := RequestPayload{
 				Action:    op.action,
 				Namespace: "default",
 				Payload:   op.payload,
 			}
 			body, _ := json.Marshal(req)
 			httpReq := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 			w := httptest.NewRecorder()
 			handler.handleWorkflow(w, httpReq)
 			if w.Code != http.StatusOK {
 				t.Errorf("Operation %s failed with status %d", op.action, w.Code)
 			}
 			var resp ResponsePayload
 			json.NewDecoder(w.Body).Decode(&resp)
 			if resp.Action != op.action {
 				t.Errorf("Expected action %s, got %s", op.action, resp.Action)
 			}
 			if resp.Timestamp.IsZero() {
 				t.Errorf("Timestamp not set for %s", op.action)
 			}
 		})
 	}
 }
@@ -0,0 +1,713 @@
 //go:build !nointegration
 // +build !nointegration
 package temporal
 import (
 	"bytes"
 	"encoding/json"
 	"net/http"
 	"net/http/httptest"
 	"testing"
 )
 func init() {
 	// Skip all tests in this file if Temporal server not available
 	if !isTemporalAvailable() {
 		// Tests will be skipped
 	}
 }
 // TestHandler_StartWorkflow tests the START_WORKFLOW operation
 func TestHandler_StartWorkflow(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	reqBody := RequestPayload{
 		Action:    "START_WORKFLOW",
 		Namespace: "default",
 		Payload: map[string]interface{}{
 			"workflow_id":   "test_workflow_1",
 			"workflow_type": "TestWorkflow",
 			"task_queue":    "test_queue",
 			"input": map[string]interface{}{
 				"test_data": "value",
 			},
 		},
 	}
 	body, _ := json.Marshal(reqBody)
 	req := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 	w := httptest.NewRecorder()
 	handler.handleWorkflow(w, req)
 	if w.Code != http.StatusOK {
 		t.Errorf("Expected status 200, got %d", w.Code)
 	}
 	var response ResponsePayload
 	json.NewDecoder(w.Body).Decode(&response)
 	if !response.Success {
 		t.Errorf("Expected success response")
 	}
 	if response.Action != "START_WORKFLOW" {
 		t.Errorf("Expected action START_WORKFLOW")
 	}
 }
 // TestHandler_DescribeWorkflow tests the DESCRIBE_WORKFLOW operation
 func TestHandler_DescribeWorkflow(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	reqBody := RequestPayload{
 		Action:    "DESCRIBE_WORKFLOW",
 		Namespace: "default",
 		Payload: map[string]interface{}{
 			"workflow_id": "test_workflow_1",
 			"run_id":      "run_abc123",
 		},
 	}
 	body, _ := json.Marshal(reqBody)
 	req := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 	w := httptest.NewRecorder()
 	handler.handleWorkflow(w, req)
 	if w.Code != http.StatusOK {
 		t.Errorf("Expected status 200, got %d", w.Code)
 	}
 	var response ResponsePayload
 	json.NewDecoder(w.Body).Decode(&response)
 	if response.Action != "DESCRIBE_WORKFLOW" {
 		t.Errorf("Expected action DESCRIBE_WORKFLOW")
 	}
 }
 // TestHandler_ListWorkflows tests the LIST_WORKFLOWS operation
 func TestHandler_ListWorkflows(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	reqBody := RequestPayload{
 		Action:    "LIST_WORKFLOWS",
 		Namespace: "default",
 		Payload: map[string]interface{}{
 			"status":    "RUNNING",
 			"page_size": 50,
 		},
 	}
 	body, _ := json.Marshal(reqBody)
 	req := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 	w := httptest.NewRecorder()
 	handler.handleWorkflow(w, req)
 	if w.Code != http.StatusOK {
 		t.Errorf("Expected status 200, got %d", w.Code)
 	}
 }
 // TestHandler_RequestValidation tests request validation
 func TestHandler_RequestValidation(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	tests := []struct {
 		name           string
 		method         string
 		body           interface{}
 		expectedStatus int
 	}{
 		{
 			name:           "Invalid method (GET)",
 			method:         "GET",
 			body:           map[string]interface{}{},
 			expectedStatus: http.StatusMethodNotAllowed,
 		},
 		{
 			name:           "Missing action",
 			method:         "POST",
 			body:           map[string]interface{}{"namespace": "default"},
 			expectedStatus: http.StatusBadRequest,
 		},
 	}
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
 			body, _ := json.Marshal(test.body)
 			req := httptest.NewRequest(test.method, "/workflow", bytes.NewReader(body))
 			w := httptest.NewRecorder()
 			handler.handleWorkflow(w, req)
 			if w.Code != test.expectedStatus {
 				t.Errorf("Expected status %d, got %d", test.expectedStatus, w.Code)
 			}
 		})
 	}
 }
 // TestHandler_SignalWorkflow tests the SIGNAL_WORKFLOW operation
 func TestHandler_SignalWorkflow(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	reqBody := RequestPayload{
 		Action:    "SIGNAL_WORKFLOW",
 		Namespace: "default",
 		Payload: map[string]interface{}{
 			"workflow_id": "test_workflow_1",
 			"run_id":      "run_abc123",
 			"signal_name": "payment_received",
 			"input": map[string]interface{}{
 				"amount": 99.99,
 			},
 		},
 	}
 	body, _ := json.Marshal(reqBody)
 	req := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 	w := httptest.NewRecorder()
 	handler.handleWorkflow(w, req)
 	if w.Code != http.StatusOK {
 		t.Errorf("Expected status 200, got %d", w.Code)
 	}
 	var response ResponsePayload
 	json.NewDecoder(w.Body).Decode(&response)
 	if response.Action != "SIGNAL_WORKFLOW" {
 		t.Errorf("Expected action SIGNAL_WORKFLOW")
 	}
 }
 // TestHandler_QueryWorkflow tests the QUERY_WORKFLOW operation
 func TestHandler_QueryWorkflow(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	reqBody := RequestPayload{
 		Action:    "QUERY_WORKFLOW",
 		Namespace: "default",
 		Payload: map[string]interface{}{
 			"workflow_id": "test_workflow_1",
 			"run_id":      "run_abc123",
 			"query_type":  "get_status",
 		},
 	}
 	body, _ := json.Marshal(reqBody)
 	req := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 	w := httptest.NewRecorder()
 	handler.handleWorkflow(w, req)
 	if w.Code != http.StatusOK {
 		t.Errorf("Expected status 200, got %d", w.Code)
 	}
 	var response ResponsePayload
 	json.NewDecoder(w.Body).Decode(&response)
 	if response.Action != "QUERY_WORKFLOW" {
 		t.Errorf("Expected action QUERY_WORKFLOW")
 	}
 }
 // TestHandler_TerminateWorkflow tests the TERMINATE_WORKFLOW operation
 func TestHandler_TerminateWorkflow(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	reqBody := RequestPayload{
 		Action:    "TERMINATE_WORKFLOW",
 		Namespace: "default",
 		Payload: map[string]interface{}{
 			"workflow_id": "test_workflow_1",
 			"run_id":      "run_abc123",
 			"reason":      "User requested cancellation",
 		},
 	}
 	body, _ := json.Marshal(reqBody)
 	req := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 	w := httptest.NewRecorder()
 	handler.handleWorkflow(w, req)
 	if w.Code != http.StatusOK {
 		t.Errorf("Expected status 200, got %d", w.Code)
 	}
 }
 // TestHandler_CancelWorkflow tests the CANCEL_WORKFLOW operation
 func TestHandler_CancelWorkflow(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	reqBody := RequestPayload{
 		Action:    "CANCEL_WORKFLOW",
 		Namespace: "default",
 		Payload: map[string]interface{}{
 			"workflow_id": "test_workflow_1",
 			"run_id":      "run_abc123",
 		},
 	}
 	body, _ := json.Marshal(reqBody)
 	req := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 	w := httptest.NewRecorder()
 	handler.handleWorkflow(w, req)
 	if w.Code != http.StatusOK {
 		t.Errorf("Expected status 200, got %d", w.Code)
 	}
 	var response ResponsePayload
 	json.NewDecoder(w.Body).Decode(&response)
 	if response.Action != "CANCEL_WORKFLOW" {
 		t.Errorf("Expected action CANCEL_WORKFLOW")
 	}
 }
 // TestHandler_ResponseFormat tests that responses follow the standard format
 func TestHandler_ResponseFormat(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	reqBody := RequestPayload{
 		Action:    "DESCRIBE_NAMESPACE",
 		Namespace: "default",
 	}
 	body, _ := json.Marshal(reqBody)
 	req := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 	w := httptest.NewRecorder()
 	handler.handleWorkflow(w, req)
 	var response ResponsePayload
 	json.NewDecoder(w.Body).Decode(&response)
 	if response.Timestamp.IsZero() {
 		t.Errorf("Expected timestamp to be set")
 	}
 	if response.Action != "DESCRIBE_NAMESPACE" {
 		t.Errorf("Expected action to be in response")
 	}
 }
 // TestHandler_AllWorkflowOperations tests that all workflow operations are recognized
 func TestHandler_AllWorkflowOperations(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	operations := []string{
 		"START_WORKFLOW",
 		"DESCRIBE_WORKFLOW",
 		"LIST_WORKFLOWS",
 		"GET_WORKFLOW_HISTORY",
 		"TERMINATE_WORKFLOW",
 		"CANCEL_WORKFLOW",
 		"SIGNAL_WORKFLOW",
 		"QUERY_WORKFLOW",
 		"RESET_WORKFLOW",
 		"UPDATE_WORKFLOW",
 	}
 	for _, op := range operations {
 		t.Run(op, func(t *testing.T) {
 			reqBody := RequestPayload{
 				Action:    op,
 				Namespace: "default",
 				Payload: map[string]interface{}{
 					"workflow_id": "test",
 				},
 			}
 			body, _ := json.Marshal(reqBody)
 			req := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 			w := httptest.NewRecorder()
 			handler.handleWorkflow(w, req)
 			var response ResponsePayload
 			json.NewDecoder(w.Body).Decode(&response)
 			if response.Action != op {
 				t.Errorf("Operation %s not routed correctly", op)
 			}
 		})
 	}
 }
 // TestHandler_AllActivityOperations tests that all activity operations are recognized
 func TestHandler_AllActivityOperations(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	operations := []string{
 		"HEARTBEAT_ACTIVITY",
 		"COMPLETE_ACTIVITY",
 		"FAIL_ACTIVITY",
 	}
 	for _, op := range operations {
 		t.Run(op, func(t *testing.T) {
 			reqBody := RequestPayload{
 				Action:    op,
 				Namespace: "default",
 				Payload: map[string]interface{}{
 					"task_token": "base64_encoded_token",
 				},
 			}
 			body, _ := json.Marshal(reqBody)
 			req := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 			w := httptest.NewRecorder()
 			handler.handleWorkflow(w, req)
 			var response ResponsePayload
 			json.NewDecoder(w.Body).Decode(&response)
 			if response.Action != op {
 				t.Errorf("Operation %s not routed correctly", op)
 			}
 		})
 	}
 }
 // TestHandler_AllNamespaceOperations tests that all namespace operations are recognized
 func TestHandler_AllNamespaceOperations(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	operations := []string{
 		"LIST_NAMESPACES",
 		"DESCRIBE_NAMESPACE",
 		"CREATE_NAMESPACE",
 		"UPDATE_NAMESPACE",
 		"DELETE_NAMESPACE",
 	}
 	for _, op := range operations {
 		t.Run(op, func(t *testing.T) {
 			reqBody := RequestPayload{
 				Action:    op,
 				Namespace: "default",
 				Payload:   map[string]interface{}{},
 			}
 			body, _ := json.Marshal(reqBody)
 			req := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 			w := httptest.NewRecorder()
 			handler.handleWorkflow(w, req)
 			var response ResponsePayload
 			json.NewDecoder(w.Body).Decode(&response)
 			if response.Action != op {
 				t.Errorf("Operation %s not routed correctly", op)
 			}
 		})
 	}
 }
 // TestHandler_AllClusterOperations tests that all cluster operations are recognized
 func TestHandler_AllClusterOperations(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	operations := []string{
 		"GET_CLUSTER_INFO",
 		"LIST_CLUSTER_MEMBERS",
 		"GET_SYSTEM_INFO",
 	}
 	for _, op := range operations {
 		t.Run(op, func(t *testing.T) {
 			reqBody := RequestPayload{
 				Action:    op,
 				Namespace: "default",
 				Payload:   map[string]interface{}{},
 			}
 			body, _ := json.Marshal(reqBody)
 			req := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 			w := httptest.NewRecorder()
 			handler.handleWorkflow(w, req)
 			var response ResponsePayload
 			json.NewDecoder(w.Body).Decode(&response)
 			if response.Action != op {
 				t.Errorf("Operation %s not routed correctly", op)
 			}
 		})
 	}
 }
 // TestHandler_MissingRequiredFields tests validation of required fields
 func TestHandler_MissingRequiredFields(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	tests := []struct {
 		name      string
 		operation string
 		payload   map[string]interface{}
 		shouldFail bool
 	}{
 		{
 			name:      "START_WORKFLOW missing workflow_id",
 			operation: "START_WORKFLOW",
 			payload: map[string]interface{}{
 				"workflow_type": "TestWorkflow",
 				"task_queue":    "test_queue",
 			},
 			shouldFail: true,
 		},
 		{
 			name:      "DESCRIBE_WORKFLOW missing workflow_id",
 			operation: "DESCRIBE_WORKFLOW",
 			payload:   map[string]interface{}{},
 			shouldFail: true,
 		},
 		{
 			name:      "SIGNAL_WORKFLOW missing signal_name",
 			operation: "SIGNAL_WORKFLOW",
 			payload: map[string]interface{}{
 				"workflow_id": "test",
 				"run_id":      "run",
 			},
 			shouldFail: true,
 		},
 	}
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
 			reqBody := RequestPayload{
 				Action:    test.operation,
 				Namespace: "default",
 				Payload:   test.payload,
 			}
 			body, _ := json.Marshal(reqBody)
 			req := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 			w := httptest.NewRecorder()
 			handler.handleWorkflow(w, req)
 			if test.shouldFail {
 				if w.Code == http.StatusOK {
 					var response ResponsePayload
 					json.NewDecoder(w.Body).Decode(&response)
 					if response.Success {
 						t.Errorf("Expected request to fail for %s", test.name)
 					}
 				}
 			}
 		})
 	}
 }
 // TestHandler_RequestMethod tests HTTP method validation
 func TestHandler_RequestMethod(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	methods := []string{"GET", "PUT", "DELETE", "PATCH"}
 	for _, method := range methods {
 		t.Run(method, func(t *testing.T) {
 			req := httptest.NewRequest(method, "/workflow", nil)
 			w := httptest.NewRecorder()
 			handler.handleWorkflow(w, req)
 			if w.Code != http.StatusMethodNotAllowed {
 				t.Errorf("Expected 405 for %s method, got %d", method, w.Code)
 			}
 		})
 	}
 }
 // TestHandler_UnknownAction tests handling of unknown actions
 func TestHandler_UnknownAction(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	reqBody := RequestPayload{
 		Action:    "UNKNOWN_ACTION",
 		Namespace: "default",
 		Payload:   map[string]interface{}{},
 	}
 	body, _ := json.Marshal(reqBody)
 	req := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 	w := httptest.NewRecorder()
 	handler.handleWorkflow(w, req)
 	if w.Code != http.StatusBadRequest {
 		t.Errorf("Expected 400 for unknown action, got %d", w.Code)
 	}
 	var response ResponsePayload
 	json.NewDecoder(w.Body).Decode(&response)
 	if response.Error != "INVALID_ACTION" {
 		t.Errorf("Expected INVALID_ACTION error")
 	}
 }
 // TestHandler_HealthEndpoint tests the health check endpoint
 func TestHandler_HealthEndpoint(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	req := httptest.NewRequest("GET", "/workflow/health", nil)
 	w := httptest.NewRecorder()
 	handler.ServeHTTP(w, req)
 	if w.Code != http.StatusOK {
 		t.Errorf("Expected 200 for health check, got %d", w.Code)
 	}
 }
 // TestHandler_MetricsEndpoint tests the metrics endpoint
 func TestHandler_MetricsEndpoint(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	req := httptest.NewRequest("GET", "/workflow/metrics", nil)
 	w := httptest.NewRecorder()
 	handler.ServeHTTP(w, req)
 	if w.Code != http.StatusOK {
 		t.Errorf("Expected 200 for metrics, got %d", w.Code)
 	}
 }
 // TestHandler_NotFoundEndpoint tests 404 handling
 func TestHandler_NotFoundEndpoint(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	req := httptest.NewRequest("GET", "/unknown", nil)
 	w := httptest.NewRecorder()
 	handler.ServeHTTP(w, req)
 	if w.Code != http.StatusNotFound {
 		t.Errorf("Expected 404 for unknown endpoint, got %d", w.Code)
 	}
 }
 // TestHandler_NamespaceDefaulting tests that namespace defaults to "default"
 func TestHandler_NamespaceDefaulting(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	reqBody := RequestPayload{
 		Action:  "DESCRIBE_WORKFLOW",
 		Payload: map[string]interface{}{"workflow_id": "test"},
 	}
 	body, _ := json.Marshal(reqBody)
 	req := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 	w := httptest.NewRecorder()
 	handler.handleWorkflow(w, req)
 	var response ResponsePayload
 	json.NewDecoder(w.Body).Decode(&response)
 	if response.Namespace != "default" {
 		t.Errorf("Expected namespace to default to 'default', got %s", response.Namespace)
 	}
 }
 // TestHandler_AllSearchAttributeOperations tests search attribute operations
 func TestHandler_AllSearchAttributeOperations(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	operations := []string{
 		"LIST_SEARCH_ATTRIBUTES",
 		"ADD_SEARCH_ATTRIBUTES",
 	}
 	for _, op := range operations {
 		t.Run(op, func(t *testing.T) {
 			reqBody := RequestPayload{
 				Action:    op,
 				Namespace: "default",
 				Payload:   map[string]interface{}{},
 			}
 			body, _ := json.Marshal(reqBody)
 			req := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 			w := httptest.NewRecorder()
 			handler.handleWorkflow(w, req)
 			var response ResponsePayload
 			json.NewDecoder(w.Body).Decode(&response)
 			if response.Action != op {
 				t.Errorf("Operation %s not routed correctly", op)
 			}
 		})
 	}
 }
 // TestHandler_ListTaskQueuesOperation tests task queue operation
 func TestHandler_ListTaskQueuesOperation(t *testing.T) {
 	if !isTemporalAvailable() { t.Skip("Temporal server not available"); return }
 	handler := NewHandler("localhost:7233")
 	reqBody := RequestPayload{
 		Action:    "LIST_TASK_QUEUES",
 		Namespace: "default",
 		Payload: map[string]interface{}{
 			"queue_type": "WORKFLOW",
 		},
 	}
 	body, _ := json.Marshal(reqBody)
 	req := httptest.NewRequest("POST", "/workflow", bytes.NewReader(body))
 	w := httptest.NewRecorder()
 	handler.handleWorkflow(w, req)
 	if w.Code != http.StatusOK {
 		t.Errorf("Expected 200, got %d", w.Code)
 	}
 	var response ResponsePayload
 	json.NewDecoder(w.Body).Decode(&response)
 	if response.Action != "LIST_TASK_QUEUES" {
 		t.Errorf("Expected LIST_TASK_QUEUES action")
 	}
 }
@@ -0,0 +1,331 @@
 // Package temporal provides gRPC implementations for Temporal operations
 package temporal
 import (
 	"context"
 	"encoding/json"
 	"fmt"
 	"time"
 	"google.golang.org/protobuf/types/known/durationpb"
 	"go.temporal.io/api/common/v1"
 	"go.temporal.io/api/workflowservice/v1"
 	"go.temporal.io/api/operatorservice/v1"
 	"go.temporal.io/api/taskqueue/v1"
 	"go.temporal.io/api/query/v1"
 	enumsv1 "go.temporal.io/api/enums/v1"
 )
 // WorkflowGRPCImpl provides gRPC implementations for workflow operations
 type WorkflowGRPCImpl struct {
 	grpc *GRPCClient
 }
 // NewWorkflowGRPCImpl creates a new workflow gRPC implementation
 func NewWorkflowGRPCImpl(grpcClient *GRPCClient) *WorkflowGRPCImpl {
 	return &WorkflowGRPCImpl{grpc: grpcClient}
 }
 // StartWorkflowExecution starts a workflow via gRPC
 func (w *WorkflowGRPCImpl) StartWorkflowExecution(ctx context.Context, namespace, workflowID, workflowType, taskQueueName string, input map[string]interface{}) (map[string]interface{}, error) {
 	inputBytes, _ := json.Marshal(input)
 	req := &workflowservice.StartWorkflowExecutionRequest{
 		Namespace:                namespace,
 		WorkflowId:               workflowID,
 		WorkflowType:             &common.WorkflowType{Name: workflowType},
 		TaskQueue:                &taskqueue.TaskQueue{Name: taskQueueName},
 		WorkflowExecutionTimeout: durationpb.New(24 * time.Hour),
 		WorkflowRunTimeout:       durationpb.New(24 * time.Hour),
 		WorkflowTaskTimeout:      durationpb.New(10 * time.Minute),
 		Input: &common.Payloads{
 			Payloads: []*common.Payload{
 				{
 					Data: inputBytes,
 					Metadata: map[string][]byte{
 						"encoding": []byte("json/plain"),
 					},
 				},
 			},
 		},
 	}
 	resp, err := w.grpc.GetWorkflowServiceStub().StartWorkflowExecution(ctx, req)
 	if err != nil {
 		return nil, fmt.Errorf("gRPC StartWorkflowExecution failed: %w", err)
 	}
 	return map[string]interface{}{
 		"workflow_id": workflowID,
 		"run_id":      resp.RunId,
 		"started_at":  time.Now(),
 	}, nil
 }
 // DescribeWorkflowExecution gets workflow details via gRPC
 func (w *WorkflowGRPCImpl) DescribeWorkflowExecution(ctx context.Context, namespace, workflowID, runID string) (map[string]interface{}, error) {
 	req := &workflowservice.DescribeWorkflowExecutionRequest{
 		Namespace: namespace,
 		Execution: &common.WorkflowExecution{
 			WorkflowId: workflowID,
 			RunId:      runID,
 		},
 	}
 	resp, err := w.grpc.GetWorkflowServiceStub().DescribeWorkflowExecution(ctx, req)
 	if err != nil {
 		return nil, fmt.Errorf("gRPC DescribeWorkflowExecution failed: %w", err)
 	}
 	info := resp.WorkflowExecutionInfo
 	if info == nil {
 		return nil, fmt.Errorf("workflow execution info not found")
 	}
 	return map[string]interface{}{
 		"workflow_id":     workflowID,
 		"run_id":          runID,
 		"workflow_type":   info.Type.Name,
 		"status":          info.Status.String(),
 		"start_time":      info.StartTime.AsTime(),
 		"close_time":      info.CloseTime.AsTime(),
 		"history_length":  info.HistoryLength,
 		"task_queue":      info.TaskQueue,
 	}, nil
 }
 // TerminateWorkflowExecution terminates a workflow via gRPC
 func (w *WorkflowGRPCImpl) TerminateWorkflowExecution(ctx context.Context, namespace, workflowID, runID, reason string) (map[string]interface{}, error) {
 	req := &workflowservice.TerminateWorkflowExecutionRequest{
 		Namespace: namespace,
 		WorkflowExecution: &common.WorkflowExecution{
 			WorkflowId: workflowID,
 			RunId:      runID,
 		},
 		Reason: reason,
 	}
 	_, err := w.grpc.GetWorkflowServiceStub().TerminateWorkflowExecution(ctx, req)
 	if err != nil {
 		return nil, fmt.Errorf("gRPC TerminateWorkflowExecution failed: %w", err)
 	}
 	return map[string]interface{}{
 		"workflow_id":   workflowID,
 		"run_id":        runID,
 		"status":        "TERMINATED",
 		"terminated_at": time.Now(),
 		"reason":        reason,
 	}, nil
 }
 // CancelWorkflowExecution cancels a workflow via gRPC
 func (w *WorkflowGRPCImpl) CancelWorkflowExecution(ctx context.Context, namespace, workflowID, runID string) (map[string]interface{}, error) {
 	req := &workflowservice.RequestCancelWorkflowExecutionRequest{
 		Namespace: namespace,
 		WorkflowExecution: &common.WorkflowExecution{
 			WorkflowId: workflowID,
 			RunId:      runID,
 		},
 	}
 	_, err := w.grpc.GetWorkflowServiceStub().RequestCancelWorkflowExecution(ctx, req)
 	if err != nil {
 		return nil, fmt.Errorf("gRPC RequestCancelWorkflowExecution failed: %w", err)
 	}
 	return map[string]interface{}{
 		"workflow_id":  workflowID,
 		"run_id":       runID,
 		"status":       "CANCEL_REQUESTED",
 		"cancelled_at": time.Now(),
 	}, nil
 }
 // SignalWorkflowExecution sends a signal to a workflow via gRPC
 func (w *WorkflowGRPCImpl) SignalWorkflowExecution(ctx context.Context, namespace, workflowID, runID, signalName string, input map[string]interface{}) (map[string]interface{}, error) {
 	inputBytes, _ := json.Marshal(input)
 	req := &workflowservice.SignalWorkflowExecutionRequest{
 		Namespace: namespace,
 		WorkflowExecution: &common.WorkflowExecution{
 			WorkflowId: workflowID,
 			RunId:      runID,
 		},
 		SignalName: signalName,
 		Input: &common.Payloads{
 			Payloads: []*common.Payload{
 				{
 					Data: inputBytes,
 					Metadata: map[string][]byte{
 						"encoding": []byte("json/plain"),
 					},
 				},
 			},
 		},
 	}
 	_, err := w.grpc.GetWorkflowServiceStub().SignalWorkflowExecution(ctx, req)
 	if err != nil {
 		return nil, fmt.Errorf("gRPC SignalWorkflowExecution failed: %w", err)
 	}
 	return map[string]interface{}{
 		"workflow_id": workflowID,
 		"run_id":      runID,
 		"signal_name": signalName,
 		"signaled_at": time.Now(),
 	}, nil
 }
 // QueryWorkflowExecution queries a workflow via gRPC
 func (w *WorkflowGRPCImpl) QueryWorkflowExecution(ctx context.Context, namespace, workflowID, runID, queryType string) (map[string]interface{}, error) {
 	req := &workflowservice.QueryWorkflowRequest{
 		Namespace: namespace,
 		Execution: &common.WorkflowExecution{
 			WorkflowId: workflowID,
 			RunId:      runID,
 		},
 		Query: &query.WorkflowQuery{
 			QueryType: queryType,
 		},
 	}
 	resp, err := w.grpc.GetWorkflowServiceStub().QueryWorkflow(ctx, req)
 	if err != nil {
 		return nil, fmt.Errorf("gRPC QueryWorkflow failed: %w", err)
 	}
 	var queryResult interface{} = nil
 	if resp.QueryResult != nil && len(resp.QueryResult.Payloads) > 0 {
 		json.Unmarshal(resp.QueryResult.Payloads[0].Data, &queryResult)
 	}
 	return map[string]interface{}{
 		"workflow_id":  workflowID,
 		"run_id":       runID,
 		"query_type":   queryType,
 		"query_result": queryResult,
 		"queried_at":   time.Now(),
 	}, nil
 }
 // ListWorkflowExecutions lists workflows via gRPC
 func (w *WorkflowGRPCImpl) ListWorkflowExecutions(ctx context.Context, namespace string, pageSize int32) (map[string]interface{}, error) {
 	if pageSize <= 0 {
 		pageSize = 10
 	}
 	req := &workflowservice.ListWorkflowExecutionsRequest{
 		Namespace: namespace,
 		PageSize:  pageSize,
 		Query:     "ExecutionStatus != 'CLOSED'",
 	}
 	resp, err := w.grpc.GetWorkflowServiceStub().ListWorkflowExecutions(ctx, req)
 	if err != nil {
 		return nil, fmt.Errorf("gRPC ListWorkflowExecutions failed: %w", err)
 	}
 	executions := make([]map[string]interface{}, len(resp.Executions))
 	for i, exec := range resp.Executions {
 		executions[i] = map[string]interface{}{
 			"workflow_id": exec.Execution.WorkflowId,
 			"run_id":      exec.Execution.RunId,
 			"type":        exec.Type.Name,
 			"status":      exec.Status.String(),
 			"start_time":  exec.StartTime.AsTime(),
 		}
 	}
 	return map[string]interface{}{
 		"executions":      executions,
 		"count":           len(executions),
 		"next_page_token": string(resp.NextPageToken),
 	}, nil
 }
 // GetWorkflowExecutionHistory gets workflow history via gRPC
 func (w *WorkflowGRPCImpl) GetWorkflowExecutionHistory(ctx context.Context, namespace, workflowID, runID string) (map[string]interface{}, error) {
 	req := &workflowservice.GetWorkflowExecutionHistoryRequest{
 		Namespace: namespace,
 		Execution: &common.WorkflowExecution{
 			WorkflowId: workflowID,
 			RunId:      runID,
 		},
 	}
 	resp, err := w.grpc.GetWorkflowServiceStub().GetWorkflowExecutionHistory(ctx, req)
 	if err != nil {
 		return nil, fmt.Errorf("gRPC GetWorkflowExecutionHistory failed: %w", err)
 	}
 	events := make([]map[string]interface{}, len(resp.History.Events))
 	for i, event := range resp.History.Events {
 		events[i] = map[string]interface{}{
 			"event_id":  event.EventId,
 			"type":      event.EventType.String(),
 			"timestamp": event.EventTime.AsTime(),
 		}
 	}
 	return map[string]interface{}{
 		"workflow_id": workflowID,
 		"run_id":      runID,
 		"events":      events,
 		"event_count": len(events),
 	}, nil
 }
 // SearchAttributesGRPCImpl provides gRPC implementations for search attributes
 type SearchAttributesGRPCImpl struct {
 	grpc *GRPCClient
 }
 // NewSearchAttributesGRPCImpl creates a new search attributes gRPC implementation
 func NewSearchAttributesGRPCImpl(grpcClient *GRPCClient) *SearchAttributesGRPCImpl {
 	return &SearchAttributesGRPCImpl{grpc: grpcClient}
 }
 // ListSearchAttributes lists search attributes via gRPC
 func (s *SearchAttributesGRPCImpl) ListSearchAttributes(ctx context.Context) (map[string]interface{}, error) {
 	req := &operatorservice.ListSearchAttributesRequest{}
 	resp, err := s.grpc.GetOperatorServiceStub().ListSearchAttributes(ctx, req)
 	if err != nil {
 		return nil, fmt.Errorf("gRPC ListSearchAttributes failed: %w", err)
 	}
 	attributes := make(map[string]interface{})
 	for name, attrType := range resp.CustomAttributes {
 		attributes[name] = attrType.String()
 	}
 	return map[string]interface{}{
 		"custom_attributes": attributes,
 		"count":             len(attributes),
 	}, nil
 }
 // AddSearchAttributes adds search attributes via gRPC
 func (s *SearchAttributesGRPCImpl) AddSearchAttributes(ctx context.Context, attributes map[string]interface{}) (map[string]interface{}, error) {
 	customAttrs := make(map[string]enumsv1.IndexedValueType)
 	for name := range attributes {
 		customAttrs[name] = enumsv1.INDEXED_VALUE_TYPE_TEXT
 	}
 	req := &operatorservice.AddSearchAttributesRequest{
 		SearchAttributes: customAttrs,
 	}
 	_, err := s.grpc.GetOperatorServiceStub().AddSearchAttributes(ctx, req)
 	if err != nil {
 		return nil, fmt.Errorf("gRPC AddSearchAttributes failed: %w", err)
 	}
 	return map[string]interface{}{
 		"attributes_added": len(customAttrs),
 		"attributes":       attributes,
 		"added_at":         time.Now(),
 	}, nil
 }
@@ -0,0 +1,276 @@
 package temporal
 import (
 	"context"
 	"testing"
 	"time"
 )
 // TestWorkflowGRPCImpl_StartWorkflowExecution tests the gRPC StartWorkflowExecution
 func TestWorkflowGRPCImpl_StartWorkflowExecution(t *testing.T) {
 	grpcClient, err := NewGRPCClient("localhost:7233")
 	if err != nil {
 		t.Skipf("Skipping: Temporal server not available at localhost:7233: %v", err)
 	}
 	defer grpcClient.Close()
 	impl := NewWorkflowGRPCImpl(grpcClient)
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
 	result, err := impl.StartWorkflowExecution(
 		ctx,
 		"default",
 		"test_workflow_"+t.Name(),
 		"TestWorkflow",
 		"default",
 		map[string]interface{}{"test": "data"},
 	)
 	// If Temporal server is running, we expect success
 	if err == nil {
 		if result["workflow_id"] != "test_workflow_"+t.Name() {
 			t.Errorf("Expected workflow_id %s, got %v", t.Name(), result["workflow_id"])
 		}
 		if result["run_id"] == nil {
 			t.Error("Expected run_id in response")
 		}
 	} else {
 		// If server is not available, that's okay for this test
 		t.Logf("Temporal server not available: %v", err)
 	}
 }
 // TestWorkflowGRPCImpl_DescribeWorkflowExecution tests the gRPC DescribeWorkflowExecution
 func TestWorkflowGRPCImpl_DescribeWorkflowExecution(t *testing.T) {
 	grpcClient, err := NewGRPCClient("localhost:7233")
 	if err != nil {
 		t.Skipf("Skipping: Temporal server not available: %v", err)
 	}
 	defer grpcClient.Close()
 	impl := NewWorkflowGRPCImpl(grpcClient)
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
 	result, err := impl.DescribeWorkflowExecution(ctx, "default", "test_id", "run_id")
 	// If Temporal server is running, we expect either success or a valid error
 	if err == nil {
 		if result["workflow_id"] == nil {
 			t.Error("Expected workflow_id in response")
 		}
 	} else {
 		// If server is not available or workflow not found, that's okay for this test
 		t.Logf("gRPC call result: %v", err)
 	}
 }
 // TestWorkflowGRPCImpl_TerminateWorkflowExecution tests termination
 func TestWorkflowGRPCImpl_TerminateWorkflowExecution(t *testing.T) {
 	grpcClient, err := NewGRPCClient("localhost:7233")
 	if err != nil {
 		t.Skipf("Skipping: Temporal server not available: %v", err)
 	}
 	defer grpcClient.Close()
 	impl := NewWorkflowGRPCImpl(grpcClient)
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
 	result, err := impl.TerminateWorkflowExecution(ctx, "default", "test_id", "run_id", "test termination")
 	if err == nil {
 		if result["status"] != "TERMINATED" {
 			t.Errorf("Expected status TERMINATED, got %v", result["status"])
 		}
 	} else {
 		t.Logf("gRPC call result (expected if server unavailable): %v", err)
 	}
 }
 // TestWorkflowGRPCImpl_CancelWorkflowExecution tests cancellation
 func TestWorkflowGRPCImpl_CancelWorkflowExecution(t *testing.T) {
 	grpcClient, err := NewGRPCClient("localhost:7233")
 	if err != nil {
 		t.Skipf("Skipping: Temporal server not available: %v", err)
 	}
 	defer grpcClient.Close()
 	impl := NewWorkflowGRPCImpl(grpcClient)
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
 	result, err := impl.CancelWorkflowExecution(ctx, "default", "test_id", "run_id")
 	if err == nil {
 		if result["status"] != "CANCEL_REQUESTED" {
 			t.Errorf("Expected status CANCEL_REQUESTED, got %v", result["status"])
 		}
 	} else {
 		t.Logf("gRPC call result (expected if server unavailable): %v", err)
 	}
 }
 // TestWorkflowGRPCImpl_SignalWorkflowExecution tests signaling
 func TestWorkflowGRPCImpl_SignalWorkflowExecution(t *testing.T) {
 	grpcClient, err := NewGRPCClient("localhost:7233")
 	if err != nil {
 		t.Skipf("Skipping: Temporal server not available: %v", err)
 	}
 	defer grpcClient.Close()
 	impl := NewWorkflowGRPCImpl(grpcClient)
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
 	result, err := impl.SignalWorkflowExecution(
 		ctx,
 		"default",
 		"test_id",
 		"run_id",
 		"test_signal",
 		map[string]interface{}{"data": "value"},
 	)
 	if err == nil {
 		if result["signal_name"] != "test_signal" {
 			t.Errorf("Expected signal_name test_signal, got %v", result["signal_name"])
 		}
 	} else {
 		t.Logf("gRPC call result (expected if server unavailable): %v", err)
 	}
 }
 // TestWorkflowGRPCImpl_QueryWorkflowExecution tests querying
 func TestWorkflowGRPCImpl_QueryWorkflowExecution(t *testing.T) {
 	grpcClient, err := NewGRPCClient("localhost:7233")
 	if err != nil {
 		t.Skipf("Skipping: Temporal server not available: %v", err)
 	}
 	defer grpcClient.Close()
 	impl := NewWorkflowGRPCImpl(grpcClient)
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
 	result, err := impl.QueryWorkflowExecution(ctx, "default", "test_id", "run_id", "test_query")
 	if err == nil {
 		if result["query_type"] != "test_query" {
 			t.Errorf("Expected query_type test_query, got %v", result["query_type"])
 		}
 	} else {
 		t.Logf("gRPC call result (expected if server unavailable): %v", err)
 	}
 }
 // TestWorkflowGRPCImpl_ListWorkflowExecutions tests listing
 func TestWorkflowGRPCImpl_ListWorkflowExecutions(t *testing.T) {
 	grpcClient, err := NewGRPCClient("localhost:7233")
 	if err != nil {
 		t.Skipf("Skipping: Temporal server not available: %v", err)
 	}
 	defer grpcClient.Close()
 	impl := NewWorkflowGRPCImpl(grpcClient)
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
 	result, err := impl.ListWorkflowExecutions(ctx, "default", 10)
 	if err == nil {
 		if result["count"] == nil {
 			t.Error("Expected count in response")
 		}
 		if result["executions"] == nil {
 			t.Error("Expected executions in response")
 		}
 	} else {
 		t.Logf("gRPC call result (expected if server unavailable): %v", err)
 	}
 }
 // TestWorkflowGRPCImpl_GetWorkflowExecutionHistory tests history retrieval
 func TestWorkflowGRPCImpl_GetWorkflowExecutionHistory(t *testing.T) {
 	grpcClient, err := NewGRPCClient("localhost:7233")
 	if err != nil {
 		t.Skipf("Skipping: Temporal server not available: %v", err)
 	}
 	defer grpcClient.Close()
 	impl := NewWorkflowGRPCImpl(grpcClient)
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
 	result, err := impl.GetWorkflowExecutionHistory(ctx, "default", "test_id", "run_id")
 	if err == nil {
 		if result["events"] == nil {
 			t.Error("Expected events in response")
 		}
 	} else {
 		t.Logf("gRPC call result (expected if server unavailable): %v", err)
 	}
 }
 // TestSearchAttributesGRPCImpl_ListSearchAttributes tests search attributes listing
 func TestSearchAttributesGRPCImpl_ListSearchAttributes(t *testing.T) {
 	grpcClient, err := NewGRPCClient("localhost:7233")
 	if err != nil {
 		t.Skipf("Skipping: Temporal server not available: %v", err)
 	}
 	defer grpcClient.Close()
 	impl := NewSearchAttributesGRPCImpl(grpcClient)
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
 	result, err := impl.ListSearchAttributes(ctx)
 	if err == nil {
 		if result["count"] == nil {
 			t.Error("Expected count in response")
 		}
 	} else {
 		t.Logf("gRPC call result (expected if server unavailable): %v", err)
 	}
 }
 // TestGRPCClient_HealthCheck tests the health check
 func TestGRPCClient_HealthCheck(t *testing.T) {
 	grpcClient, err := NewGRPCClient("localhost:7233")
 	if err != nil {
 		t.Skipf("Skipping: Cannot connect to Temporal server: %v", err)
 	}
 	defer grpcClient.Close()
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
 	err = grpcClient.HealthCheck(ctx)
 	if err != nil {
 		t.Logf("Health check failed (expected if Temporal server not running): %v", err)
 	}
 }
 // TestGRPCClient_ConnectionFailure tests connection error handling
 func TestGRPCClient_ConnectionFailure(t *testing.T) {
 	// Try to connect to non-existent server
 	grpcClient, err := NewGRPCClient("localhost:9999")
 	// Connection should be created but fail on first call
 	if grpcClient == nil && err != nil {
 		t.Logf("Expected connection attempt: %v", err)
 	}
 }
@@ -0,0 +1,329 @@
 package temporal
 import (
 	"encoding/json"
 	"fmt"
 	"net/http"
 	"time"
 )
 // PoimenHandler provides typed REST endpoints for Poimen workflows.
 // Accessed via X-Service: poimen header through the ServiceAdapter dispatcher.
 type PoimenHandler struct {
 	handler *Handler
 }
 // NewPoimenHandler creates a new Poimen handler wrapping the Temporal handler.
 func NewPoimenHandler(h *Handler) *PoimenHandler {
 	return &PoimenHandler{handler: h}
 }
 // ServeHTTP routes based on X-Upstream-Path set by the dispatcher.
 func (p *PoimenHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	path := r.Header.Get("X-Upstream-Path")
 	if path == "" {
 		path = r.URL.Path
 	}
 	switch {
 	case path == "/v1/poimen/plan" && r.Method == http.MethodPost:
 		p.handlePlan(w, r)
 	case path == "/v1/poimen/execute" && r.Method == http.MethodPost:
 		p.handleExecute(w, r)
 	case path == "/v1/poimen/executions" && r.Method == http.MethodGet:
 		p.handleListExecutions(w, r)
 	case path == "/v1/poimen/executions/stream" && r.Method == http.MethodGet:
 		p.handleStream(w, r)
 	case path == "/v1/poimen/executions/signal" && r.Method == http.MethodPost:
 		p.handleSignal(w, r)
 	case path == "/v1/poimen/executions/history" && r.Method == http.MethodGet:
 		p.handleHistory(w, r)
 	case path == "/v1/poimen/executions/detail" && r.Method == http.MethodDelete:
 		p.handleTerminate(w, r)
 	case path == "/v1/poimen/executions/detail" && r.Method == http.MethodGet:
 		p.handleDescribe(w, r)
 	default:
 		writeJSON(w, http.StatusNotFound, map[string]string{"error": "endpoint not found"})
 	}
 }
 // getWorkflowID reads the workflow ID from query param (preferred) or path.
 // The ServiceAdapter sets X-Upstream-Path to a template like
 // /v1/poimen/executions/{id}/stream — the {id} is literal, not substituted.
 // So workflow_id must come from a query parameter.
 func getWorkflowID(r *http.Request) string {
 	// Query param is the primary source
 	if id := r.URL.Query().Get("workflow_id"); id != "" {
 		return id
 	}
 	return ""
 }
 // PoimenWorkflowTypes maps Poimen workflow names to Temporal workflow types and task queues.
 var PoimenWorkflowTypes = map[string]struct {
 	WorkflowType string
 	TaskQueue    string
 }{
 	"dag":          {WorkflowType: "DAGWorkflow", TaskQueue: "poimen-worker"},
 	"orchestrator": {WorkflowType: "OrchestratorWorkflow", TaskQueue: "poimen-worker"},
 	"routing":      {WorkflowType: "RoutingWorkflow", TaskQueue: "poimen-worker"},
 }
 // --- Plan ---
 type PlanRequest struct {
 	Message string                 `json:"message"`
 	Context map[string]interface{} `json:"context,omitempty"`
 }
 func (p *PoimenHandler) handlePlan(w http.ResponseWriter, r *http.Request) {
 	var req PlanRequest
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
 		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid JSON"})
 		return
 	}
 	if req.Message == "" {
 		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "message is required"})
 		return
 	}
 	// TODO: Call PlannerActivity directly (not via Temporal) for low latency.
 	// For now, return a placeholder indicating the plan endpoint is wired.
 	writeJSON(w, http.StatusNotImplemented, map[string]interface{}{
 		"error":   "PlannerActivity not yet available",
 		"message": req.Message,
 		"context": req.Context,
 		"hint":    "Depends on poimen-workflows#23 (PlannerActivity)",
 	})
 }
 // --- Execute ---
 type ExecuteRequest struct {
 	WorkflowType string                 `json:"workflow_type"` // "dag", "orchestrator", "routing"
 	Namespace    string                 `json:"namespace,omitempty"`
 	Input        map[string]interface{} `json:"input"`
 }
 func (p *PoimenHandler) handleExecute(w http.ResponseWriter, r *http.Request) {
 	var req ExecuteRequest
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
 		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid JSON"})
 		return
 	}
 	if req.Namespace == "" {
 		req.Namespace = "default"
 	}
 	wfType, ok := PoimenWorkflowTypes[req.WorkflowType]
 	if !ok {
 		writeJSON(w, http.StatusBadRequest, map[string]interface{}{
 			"error":       fmt.Sprintf("unknown workflow_type: %s", req.WorkflowType),
 			"valid_types": []string{"dag", "orchestrator", "routing"},
 		})
 		return
 	}
 	if p.handler.ops == nil {
 		writeJSON(w, http.StatusServiceUnavailable, map[string]string{"error": "Temporal not available"})
 		return
 	}
 	workflowID := fmt.Sprintf("poimen-%s-%d", req.WorkflowType, time.Now().UnixMilli())
 	result, err := p.handler.ops.StartWorkflowExecution(
 		r.Context(),
 		req.Namespace,
 		workflowID,
 		wfType.WorkflowType,
 		wfType.TaskQueue,
 		req.Input,
 	)
 	if err != nil {
 		writeJSON(w, http.StatusInternalServerError, map[string]string{"error": fmt.Sprintf("failed to start workflow: %v", err)})
 		return
 	}
 	writeJSON(w, http.StatusOK, result)
 }
 // --- List Executions ---
 func (p *PoimenHandler) handleListExecutions(w http.ResponseWriter, r *http.Request) {
 	if p.handler.ops == nil {
 		writeJSON(w, http.StatusServiceUnavailable, map[string]string{"error": "Temporal not available"})
 		return
 	}
 	namespace := r.URL.Query().Get("namespace")
 	if namespace == "" {
 		namespace = "default"
 	}
 	result, err := p.handler.ops.ListWorkflowExecutions(r.Context(), namespace, 100)
 	if err != nil {
 		writeJSON(w, http.StatusInternalServerError, map[string]string{"error": fmt.Sprintf("failed to list: %v", err)})
 		return
 	}
 	writeJSON(w, http.StatusOK, result)
 }
 // --- Describe ---
 func (p *PoimenHandler) handleDescribe(w http.ResponseWriter, r *http.Request) {
 	if p.handler.ops == nil {
 		writeJSON(w, http.StatusServiceUnavailable, map[string]string{"error": "Temporal not available"})
 		return
 	}
 	workflowID := getWorkflowID(r)
 	if workflowID == "" {
 		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "workflow_id query param required"})
 		return
 	}
 	namespace := r.URL.Query().Get("namespace")
 	if namespace == "" {
 		namespace = "default"
 	}
 	runID := r.URL.Query().Get("run_id")
 	result, err := p.handler.ops.DescribeWorkflowExecution(r.Context(), namespace, workflowID, runID)
 	if err != nil {
 		writeJSON(w, http.StatusNotFound, map[string]string{"error": fmt.Sprintf("workflow not found: %v", err)})
 		return
 	}
 	writeJSON(w, http.StatusOK, result)
 }
 // --- History ---
 func (p *PoimenHandler) handleHistory(w http.ResponseWriter, r *http.Request) {
 	if p.handler.ops == nil {
 		writeJSON(w, http.StatusServiceUnavailable, map[string]string{"error": "Temporal not available"})
 		return
 	}
 	workflowID := getWorkflowID(r)
 	if workflowID == "" {
 		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "workflow_id query param required"})
 		return
 	}
 	namespace := r.URL.Query().Get("namespace")
 	if namespace == "" {
 		namespace = "default"
 	}
 	runID := r.URL.Query().Get("run_id")
 	result, err := p.handler.ops.GetWorkflowExecutionHistory(r.Context(), namespace, workflowID, runID)
 	if err != nil {
 		writeJSON(w, http.StatusInternalServerError, map[string]string{"error": fmt.Sprintf("failed to get history: %v", err)})
 		return
 	}
 	writeJSON(w, http.StatusOK, result)
 }
 // --- Signal ---
 type SignalRequest struct {
 	SignalName string                 `json:"signal_name"`
 	Data       map[string]interface{} `json:"data,omitempty"`
 	Namespace  string                 `json:"namespace,omitempty"`
 }
 func (p *PoimenHandler) handleSignal(w http.ResponseWriter, r *http.Request) {
 	if p.handler.ops == nil {
 		writeJSON(w, http.StatusServiceUnavailable, map[string]string{"error": "Temporal not available"})
 		return
 	}
 	workflowID := getWorkflowID(r)
 	if workflowID == "" {
 		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "workflow_id query param required"})
 		return
 	}
 	var req SignalRequest
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
 		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid JSON"})
 		return
 	}
 	if req.SignalName == "" {
 		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "signal_name is required"})
 		return
 	}
 	if req.Namespace == "" {
 		req.Namespace = "default"
 	}
 	result, err := p.handler.ops.SignalWorkflowExecution(r.Context(), req.Namespace, workflowID, "", req.SignalName, req.Data)
 	if err != nil {
 		writeJSON(w, http.StatusInternalServerError, map[string]string{"error": fmt.Sprintf("failed to signal: %v", err)})
 		return
 	}
 	writeJSON(w, http.StatusOK, result)
 }
 // --- Terminate ---
 func (p *PoimenHandler) handleTerminate(w http.ResponseWriter, r *http.Request) {
 	if p.handler.ops == nil {
 		writeJSON(w, http.StatusServiceUnavailable, map[string]string{"error": "Temporal not available"})
 		return
 	}
 	workflowID := getWorkflowID(r)
 	if workflowID == "" {
 		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "workflow_id query param required"})
 		return
 	}
 	namespace := r.URL.Query().Get("namespace")
 	if namespace == "" {
 		namespace = "default"
 	}
 	result, err := p.handler.ops.TerminateWorkflowExecution(r.Context(), namespace, workflowID, "", "terminated via API")
 	if err != nil {
 		writeJSON(w, http.StatusInternalServerError, map[string]string{"error": fmt.Sprintf("failed to terminate: %v", err)})
 		return
 	}
 	writeJSON(w, http.StatusOK, result)
 }
 // --- Stream (delegate to existing SSE handler) ---
 func (p *PoimenHandler) handleStream(w http.ResponseWriter, r *http.Request) {
 	workflowID := getWorkflowID(r)
 	if workflowID == "" {
 		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "workflow_id query param required"})
 		return
 	}
 	// Set query params for the SSE handler
 	q := r.URL.Query()
 	q.Set("workflow_id", workflowID)
 	if q.Get("namespace") == "" {
 		q.Set("namespace", "default")
 	}
 	r.URL.RawQuery = q.Encode()
 	p.handler.StreamWorkflowEvents(w, r)
 }
 // --- Helpers ---
 func writeJSON(w http.ResponseWriter, status int, data interface{}) {
 	w.Header().Set("Content-Type", "application/json")
 	w.WriteHeader(status)
 	json.NewEncoder(w).Encode(data) //nolint:errcheck
 }
--- a/Show More
+++ b/Show More