# CRITICAL FIXES NEEDED - Poimen Memory Service

## STATUS: Service Non-Functional ❌

**Root Issues Blocking Service**:
1. ✅ HTTP handler deadlock fixed (schema init error handling)
2. ❌ Server initialization hangs during schema or startup (logs stop after `l2_l1_edges`)
3. ❌ Ingest pipeline NOT implemented (just raw vector storage, no entities/edges)
4. ❌ Temporal schema missing (no t_valid, t_invalid, version tracking)
5. ❌ GRM gate not integrated (no memorability scores, confidence)
6. ❌ Query doesn't use knowledge graph (just vector search)
7. ❌ Compaction disabled
8. ❌ Verification gates missing

---

## STEP 1: Fix Server Startup Hang ⚠️

**Current Issue**: Server hangs during initialization after schema creation.

**Suspected causes**:
- OptimizerServiceBuilder.build() getting stuck
- AccessGuard creation blocking
- Background task spawning deadlock

**Fix**:
```rust
// In http_server.rs:316-325
// Wrap in timeout or disable non-essentials
let optimizer_service = match tokio::time::timeout(
    Duration::from_secs(5),
    async { mem_core::optimizer::OptimizerServiceBuilder::new().build() }
).await {
    Ok(Ok(service)) => Some(Arc::new(service)),
    _ => {
        tracing::warn!("Optimizer initialization skipped (timeout or error)");
        None
    }
};
```

**Test**: `./target/release/mem serve --port 9999` should reach "Starting HTTP server" within 10s

---

## STEP 2: Implement Ingest Pipeline (HIGH PRIORITY)

**Current Implementation** (`ingest_worker.rs`):
```rust
// Just stores raw chunks + embeddings
store_chunk_l0(&l0_chunk)
store_memory_l1(&l1_memory, &embedding)
```

**Expected Implementation**:
```rust
// 1. Extract entities (entity_extractor)
let entities = entity_extractor.extract(&content).await?;

// 2. Extract facts + edges (fact_extractor)  
let facts = fact_extractor.extract(&content, entities).await?;

// 3. Create temporal edges with GRM gate
for fact in facts {
  let edge = TemporalEdge {
    source: fact.source_entity,
    target: fact.target_entity,
    relation: fact.relation,
    fact: fact.text,
    t_valid: now(),
    t_invalid: None,
    confidence: grm_gate.score(&fact)?,  // ← GRM gate
    version: 1,
  };
  edge_repo.insert(&edge).await?;
}

// 4. Check contradictions + queue for review
for edge in edges {
  if contradiction_detector.detect(&edge, existing_edges)? {
    review_queue.enqueue(&edge).await?;
  }
}
```

**Files to modify**:
- `crates/mem-cli/src/ingest_worker.rs` (core ingest logic)
- `crates/mem-ingest/src/ingest_pipeline.rs` (entity + fact extraction)
- `crates/mem-ingest/src/contradiction_detector.rs` (pre-filter + review)

---

## STEP 3: Update Storage Schema (MEDIUM PRIORITY)

**Missing fields**:
```sql
ALTER TABLE memories_l1 ADD COLUMN (
  t_valid TIMESTAMP NOT NULL DEFAULT NOW(),
  t_invalid TIMESTAMP,
  confidence FLOAT DEFAULT 0.5,
  version INT DEFAULT 1,
  memorability_score INT,
  contribution_date TIMESTAMP
);

ALTER TABLE l1_l0_edges MODIFY TO (
  l1_id UUID,
  l0_id UUID,
  relation_type VARCHAR,
  fact TEXT,
  t_valid TIMESTAMP DEFAULT NOW(),
  t_invalid TIMESTAMP,
  confidence FLOAT,
  contradiction_flag BOOL DEFAULT FALSE,
  review_queue_id UUID,
  version INT DEFAULT 1,
  PRIMARY KEY (l1_id, l0_id, version)
);
```

**Migration script**: `crates/mem-store/migrations/003_temporal_grm_schema.sql`

---

## STEP 4: Wire Query Handler to Knowledge Graph (MEDIUM PRIORITY)

**Current** (`query_handler` in http_server.rs):
```rust
async fn query_handler(...) -> HttpResponse {
    // Just semantic search
    let results = vector_search(query)?;
    HttpResponse::Ok().json(results)
}
```

**Expected**:
```rust
async fn query_handler(query: QueryRequest) -> HttpResponse {
    // 1. Semantic search on embeddings
    let initial_results = vector_search(&query.text)?;
    
    // 2. Follow edges (graph traversal)
    let mut expanded = vec![];
    for result in initial_results {
        expanded.push(result);
        // Get related entities via edges
        let related = edge_repo.find_by_source(&result.entity_id).await?;
        expanded.extend(related);
    }
    
    // 3. Apply temporal filters
    expanded.retain(|e| e.t_valid <= now() && (e.t_invalid.is_none() || e.t_invalid > now()));
    
    // 4. Sort by confidence + recency
    expanded.sort_by(|a, b| {
        b.confidence.partial_cmp(&a.confidence)
            .then_with(|| b.t_valid.cmp(&a.t_valid))
    });
    
    // 5. Apply compaction/cache alignment
    for item in &mut expanded {
        item.text = optimizer.compress(item.text)?;
    }
    
    HttpResponse::Ok().json(MemoryResponse {
        entities: expanded,
        confidence_scores: compute_scores(&expanded),
    })
}
```

---

## STEP 5: Enable Compaction Endpoint (LOW PRIORITY)

**Current**: Code exists but never called.

**Fix**: Add K8s CronJob that calls `POST /memory/compact` daily:
```yaml
apiVersion: batch/v1
kind: CronJob
metadata:
  name: memory-compaction
spec:
  schedule: "0 2 * * *"  # 2 AM UTC
  jobTemplate:
    spec:
      template:
        spec:
          containers:
          - name: compact
            image: bitnami/curl:latest
            command:
            - curl
            - -X POST
            - -H "Authorization: Bearer $ADMIN_TOKEN"
            - http://poimen-memory:8080/memory/compact
          restartPolicy: OnFailure
```

---

## STEP 6: Add Verification Gates (LOW PRIORITY)

**Missing**: `GET /memory/verify` endpoint that checks M1.8, M2.8, M3.7, M8.9 gates

---

## IMPLEMENTATION ORDER

1. **FIX STARTUP** (1 hour) → Get server running
2. **INGEST PIPELINE** (3 hours) → Wire entity + fact extraction
3. **TEMPORAL SCHEMA** (1 hour) → Add missing columns
4. **QUERY HANDLER** (2 hours) → Implement graph traversal
5. **COMPACTION** (1 hour) → Add CronJob
6. **GATES** (2 hours) → Quality verification

**Total**: ~10 hours to full working system

---

## TEST PLAN

```bash
# 1. Server starts
curl http://localhost:9999/health
# Expected: {"status":"ok","uptime_seconds":N}

# 2. Ingest works
curl -X POST http://localhost:9999/memory/ingest \
  -H "Content-Type: application/json" \
  -d '{"project":"test","source":"test://1","ingest_id":"i1","records":[{"role":"user","text":"Hello world","timestamp":"2026-01-08T16:00:00Z","source_position":0}]}'
# Expected: {"ingest_id":"i1","status":"pending",...}

# 3. Query returns entities with edges
curl -X POST http://localhost:9999/memory/query \
  -H "Content-Type: application/json" \
  -d '{"project":"test","query":"hello"}'
# Expected: {"results":[{"type":"entity","name":"...","edges":[...]}]}

# 4. Temporal filtering works
curl http://localhost:9999/memory/query?project=test&temporal_floor=2026-01-01

# 5. Compaction works
curl -X POST http://localhost:9999/memory/compact
# Expected: {"phase":"completed","records_deduplicated":N}
```

---

## FILES MODIFIED SO FAR

✅ `crates/mem-cli/src/http_server.rs` - Added error handling for schema init

---

## NEXT SESSION TODO

- [ ] Fix server startup hang (debug OptimizerService)
- [ ] Implement ingest_worker to call entity_extractor + fact_extractor
- [ ] Add temporal columns to schema
- [ ] Update query_handler to traverse edges
- [ ] Test end-to-end with sample data