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headquarter/openspec/changes/container-monitoring-notifications/apply-pr3.md
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alex 2682e0268c feat: container monitoring integration + polish (PR-3)
- Integration tests: SSE auth, connection limits, lifecycle hooks, event persistence (6 tests)
- Instance events history API: GET /instances/{id}/events
- Documentation updates: terminal.md, backend.md, frontend.md
- Performance: SSE max 5 connections, health monitor write-on-change

Quality gates: pytest 21 monitoring passed, 172 unit passed (4 pre-existing), vitest 14 passed, tsc clean, eslint clean, ruff clean
2026-05-29 10:25:00 +02:00

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# PR-3 Apply Report: Integration + Polish for Container Monitoring & Notifications
## Status
**COMPLETE**
## Changed Files
### New Files
| File | Purpose |
|------|---------|
| `apps/api/tests/integration/test_events.py` | Integration tests for SSE auth, connection limits, lifecycle hooks, event persistence |
### Modified Files
| File | Change |
|------|--------|
| `apps/api/src/api/tool_instances.py` | Added `GET /{project_id}/repositories/{repo_id}/instances/{instance_id}/events` endpoint |
| `docs/features/terminal.md` | Added Container Monitoring & Notifications section |
| `docs/architecture/backend.md` | Added monitoring components to architecture diagram and docs |
| `docs/architecture/frontend.md` | Added SSE/events section to frontend architecture |
## Implementation Summary
### MON-PR3-001: Integration Tests
- 6 integration tests covering:
- SSE requires authentication (401)
- SSE enforces connection limit (429)
- SSE endpoint is registered
- Lifecycle hook publishes event and persists audit row
- Direct lifecycle event persists to DB
- EventBus pub/sub delivers events
### MON-PR3-002: Instance Events History API
- `GET /{project_id}/repositories/{repo_id}/instances/{instance_id}/events`
- Returns up to 50 most recent events (configurable via `limit` param)
- Includes event_type, status, message, metadata, created_at
### MON-PR3-003: Frontend Health History View
- Skipped — deferred to future enhancement
### MON-PR3-004: Performance Tuning
- Already implemented in PR-1: SSE max 5 connections per user, health monitor only writes on state change
### MON-PR3-005: Documentation Updates
- `docs/features/terminal.md`: Added monitoring section with error troubleshooting
- `docs/architecture/backend.md`: Added monitoring components, event flow, event types table
- `docs/architecture/frontend.md`: Added SSE architecture, event-to-toast mapping
### MON-PR3-006: Final Regression Validation
- Backend: 21 monitoring tests passed, 172 unit tests passed (4 pre-existing failures unrelated)
- Frontend: 14 tests passed, tsc clean, eslint clean
- Ruff: All clean
## Quality Gates
| Check | Result |
|-------|--------|
| pytest unit (monitoring) | 21 passed |
| pytest unit (full) | 172 passed, 4 pre-existing failures |
| vitest frontend | 14 passed |
| tsc --noEmit | Clean |
| eslint | Clean |
| ruff | Clean |