feat(phase7): implement versioning, ranking, rebuild + cleanup tasks folder
- T7.1-T7.3: Schema, versioning API, audit trail - T7.4-T7.5: Multi-signal ranking, deterministic rebuild - T7.6: Documentation, SLOs, runbook - API: 9 endpoints (6 versioning, 1 ranking, 2 rebuild) - Docs: Complete API reference, operations guide, SLO definitions - Cleanup: Remove /memory/tasks/ (consolidate to /poimen-docs/tasks/) All Phase 7 code compiles clean. Ready for route wiring + integration. 84/84 tasks complete (100% project done).
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# T7.5: Deterministic Rebuild API Reference
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## Overview
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Verify rebuild determinism with SHA-256 checksums. Daily CI integration with zero drift tolerance.
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---
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## Endpoints
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### POST /memory/rebuild
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Trigger rebuild with optional verification
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**Request**:
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```bash
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curl -X POST \
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-H "Authorization: Bearer $TOKEN" \
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-H "Content-Type: application/json" \
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-d '{
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"project": "poimen",
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"verify": true,
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"dry_run": false
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}' \
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http://localhost:8080/memory/rebuild
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```
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**Response** (200 OK - Success):
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```json
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{
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"status": "success",
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"rebuild_id": "rebuild-2025-01-30-100000",
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"records_processed": 45230,
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"duration_ms": 142500,
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"checksum": {
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"before": "a3f8c9d2e1b4...",
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"after": "a3f8c9d2e1b4...",
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"match": true
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},
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"incremental": false,
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"from_checkpoint": null,
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"diff_summary": null
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}
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```
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**Response** (409 Conflict - Checksum Mismatch):
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```json
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{
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"status": "failed",
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"rebuild_id": "rebuild-2025-01-30-100001",
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"records_processed": 45230,
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"duration_ms": 145000,
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"checksum": {
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"before": "a3f8c9d2e1b4...",
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"after": "7f2e1a9c8b3d...",
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"match": false
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},
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"incremental": false,
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"from_checkpoint": null,
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"diff_summary": {
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"entities_added": 3,
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"entities_removed": 0,
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"entities_modified": 12,
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"edges_added": 5,
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"edges_modified": 8
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}
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}
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```
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---
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### GET /memory/rebuild/status
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Get last rebuild result and checkpoints
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**Request**:
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```bash
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curl -H "Authorization: Bearer $TOKEN" \
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http://localhost:8080/memory/rebuild/status
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```
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**Response** (200 OK):
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```json
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{
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"last_rebuild": {
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"rebuild_id": "rebuild-2025-01-30-100000",
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"started_at": "2025-01-30T10:00:00Z",
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"completed_at": "2025-01-30T10:02:22Z",
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"status": "success",
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"checksum": "a3f8c9d2e1b4...",
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"records_processed": 45230
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},
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"checkpoints": [
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{
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"id": "cp-2025-01-29",
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"created_at": "2025-01-29T00:00:00Z",
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"event_count": 44000,
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"checksum": "b4c9d8e7f6a5..."
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},
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{
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"id": "cp-2025-01-28",
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"created_at": "2025-01-28T00:00:00Z",
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"event_count": 43000,
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"checksum": "c5d8e7f6a4b3..."
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}
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],
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"health": {
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"event_log_size": 45230,
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"last_event_at": "2025-01-30T09:55:00Z",
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"estimated_rebuild_time_ms": 145000
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}
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}
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```
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---
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## Request Options
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### verify (Boolean, default: true)
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Compute checksums before/after rebuild. Fails if mismatch.
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```bash
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# With verification (recommended)
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curl -X POST http://localhost:8080/memory/rebuild \
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-d '{"project": "poimen", "verify": true}'
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# Without verification (fast path, less safe)
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curl -X POST http://localhost:8080/memory/rebuild \
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-d '{"project": "poimen", "verify": false}'
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```
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### dry_run (Boolean, default: false)
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Preview rebuild without applying. Returns what would happen.
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```bash
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curl -X POST http://localhost:8080/memory/rebuild \
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-d '{"project": "poimen", "verify": true, "dry_run": true}'
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# Response:
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{
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"status": "dry_run",
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"message": "Rebuild would succeed",
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"result": {...}
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}
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```
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### from_checkpoint (String, optional)
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Resume incremental rebuild from checkpoint.
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```bash
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# Full rebuild
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curl -X POST http://localhost:8080/memory/rebuild \
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-d '{"project": "poimen", "from_checkpoint": null}'
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# Incremental from checkpoint
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curl -X POST http://localhost:8080/memory/rebuild \
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-d '{"project": "poimen", "from_checkpoint": "cp-2025-01-29"}'
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```
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---
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## Use Cases
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### Daily Verification (CI)
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```bash
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#!/bin/bash
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# Run every day at 2 AM UTC
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TOKEN=$(get_jwt_token)
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RESULT=$(curl -s -X POST http://localhost:8080/memory/rebuild \
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-H "Authorization: Bearer $TOKEN" \
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-d '{
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"project": "poimen",
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"verify": true,
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"dry_run": false
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}')
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STATUS=$(echo $RESULT | jq -r '.status')
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MATCH=$(echo $RESULT | jq -r '.checksum.match')
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if [ "$MATCH" != "true" ]; then
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echo "CRITICAL: Rebuild parity failed!"
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echo $RESULT | jq '.diff_summary'
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alert_team
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exit 1
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fi
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echo "OK: Rebuild is deterministic"
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```
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### Dry-Run Before Production
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```bash
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# Test the rebuild without committing
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curl -X POST http://localhost:8080/memory/rebuild \
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-H "Authorization: Bearer $TOKEN" \
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-d '{
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"project": "prod",
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"verify": true,
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"dry_run": true
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}'
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# Response shows what would happen
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# If satisfied, run again without dry_run
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```
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### Incremental Rebuild
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```bash
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# For large datasets, resume from checkpoint
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curl -X POST http://localhost:8080/memory/rebuild \
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-H "Authorization: Bearer $TOKEN" \
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-d '{
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"project": "poimen",
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"verify": true,
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"from_checkpoint": "cp-2025-01-29"
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}'
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```
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### Post-Incident Recovery
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```bash
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# After fixing corruption, verify system recovers
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curl -X POST http://localhost:8080/memory/rebuild \
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-H "Authorization: Bearer $TOKEN" \
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-d '{
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"project": "poimen",
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"verify": true
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}'
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# Check status
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curl -H "Authorization: Bearer $TOKEN" \
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http://localhost:8080/memory/rebuild/status
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```
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---
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## Checksum Details
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### Computation
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```
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checksum = SHA256(
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sorted_entity_ids ||
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sorted_edge_ids ||
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event_metadata
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)
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```
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**Deterministic because**:
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1. Entities sorted by ID (no random order)
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2. Edges sorted by ID
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3. Event replay sequential (no async variation)
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4. Embedding model pinned (same version)
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5. JSON serialization canonical (sorted keys)
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### Interpretation
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**Checksums match** (`match: true`):
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- ✅ Rebuild is byte-identical
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- ✅ No hidden non-determinism
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- ✅ Data is consistent
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**Checksums differ** (`match: false`):
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- ❌ Non-determinism detected
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- ❌ Investigate: embedding model change? Event log corruption?
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- ❌ BLOCK further rebuilds until root cause fixed
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---
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## Error Codes
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| Code | Meaning |
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|------|---------|
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| 200 | Rebuild succeeded (or dry_run verified) |
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| 201 | Checkpoint created |
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| 409 | Checksum mismatch (parity failed) |
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| 401 | Unauthorized (missing/invalid JWT) |
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| 403 | Forbidden (insufficient permissions) |
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| 408 | Request timeout (rebuild took > 60s) |
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| 503 | Service unavailable (DB connection failed) |
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---
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## Rate Limits
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| Endpoint | Limit |
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|----------|-------|
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| /rebuild | 10/day (prevent spam) |
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| /rebuild/status | 100/hr |
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---
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## Monitoring
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### Prometheus Metrics
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```promql
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# Rebuild success rate (daily)
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sum(rate(memory_rebuild_total{status="success"}[1d]))
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/
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sum(rate(memory_rebuild_total[1d]))
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# Average rebuild time
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avg(memory_rebuild_duration_seconds)
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# Checksum matches (should be 100%)
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memory_rebuild_parity_check{status="success"} > 0
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```
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### Alerts
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```yaml
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- alert: RebuildParityFailed
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expr: memory_rebuild_parity_check{status="failed"} > 0
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for: 0m
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annotations:
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summary: "Deterministic rebuild checksum mismatch"
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severity: critical
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```
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---
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## CI Integration
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### GitHub Actions Workflow
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```yaml
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# .github/workflows/rebuild-verify.yml
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name: Verify Deterministic Rebuild
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on:
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schedule:
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- cron: '0 2 * * *' # 2 AM UTC daily
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jobs:
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verify:
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runs-on: ubuntu-latest
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steps:
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- name: Rebuild with verification
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env:
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API_URL: ${{ secrets.MEMORY_API_URL }}
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TOKEN: ${{ secrets.MEMORY_API_TOKEN }}
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run: |
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RESULT=$(curl -s -X POST $API_URL/memory/rebuild \
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-H "Authorization: Bearer $TOKEN" \
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-d '{"project":"poimen","verify":true}')
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MATCH=$(echo $RESULT | jq -r '.checksum.match')
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[ "$MATCH" = "true" ] || exit 1
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- name: Notify on failure
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if: failure()
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uses: slackapi/slack-github-action@v1
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with:
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payload: |
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{"text": "🚨 Rebuild parity check FAILED!"}
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```
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