phase: 02-operations-maintenance
plan: "01"
subsystem: api
tags: [fastapi, psycopg2, httpx, anthropic, health-check, pgvector]

Dependency graph

requires:
- phase: 01-docker-compose-stack
provides: docker-compose.yml with app, db, ollama services
provides:
- GET /health endpoint with per-component status for DB, Ollama, and Claude API
affects: [operations, deployment, monitoring]

Tech tracking

tech-stack:
added: []
patterns: [independent-try-except probes per dependency, degraded status aggregation]

key-files:
created: []
modified: [api.py]

key-decisions:
- "Use os.environ.get with empty-string default for env vars in health handler — avoids KeyError crash when vars not set"
- "Claude probe returns not_configured (not error) when ANTHROPIC_KEY is empty — allows health check to pass in dev without key"
- "psycopg2.connect called with connect_timeout=5 to bound health check latency"

patterns-established:
- "Health probe pattern: each dependency in its own try/except, detail only added if error"
- "Top-level status aggregation: ok if all components ok|not_configured, degraded otherwise"

requirements-completed: [OPS-02]

Metrics

duration: 1min
completed: 2026-03-24

Phase 02 Plan 01: Extended /health Endpoint Summary

GET /health now probes PostgreSQL (SELECT 1), Ollama (/api/tags), and Claude API (models.list) independently and returns structured per-component status JSON

Performance

  • Duration: ~1 min
  • Started: 2026-03-24T17:36:33Z
  • Completed: 2026-03-24T17:37:19Z
  • Tasks: 1
  • Files modified: 1

Accomplishments

  • Replaced stub {"status": "ok"} with full dependency health check
  • DB probe: psycopg2 connect + SELECT 1, 5s timeout, independent try/except
  • Ollama probe: httpx GET /api/tags, 5s timeout, non-200 treated as error
  • Claude probe: anthropic.models.list, skips gracefully if ANTHROPIC_KEY is empty (returns not_configured)
  • Top-level status is "degraded" if any component reports "error"; "ok" if all are "ok" or "not_configured"

Task Commits

Each task was committed atomically:

  1. Task 1: Extend /health with dependency probes - b72996d (feat)

Files Created/Modified

  • api.py - Extended /health endpoint with DB, Ollama, and Claude probes; added imports (anthropic, httpx, psycopg2) and module-level env var reads

Decisions Made

  • Used os.environ.get with empty-string defaults for all three env vars so the health endpoint itself cannot crash on startup if vars are missing
  • Claude status of "not_configured" (not "error") when ANTHROPIC_KEY is empty, so development setups without a key do not show as degraded
  • connect_timeout=5 on psycopg2 connection to cap latency

Deviations from Plan

None - plan executed exactly as written.

Issues Encountered

None.

User Setup Required

None - no external service configuration required.

Next Phase Readiness

  • Health endpoint ready to use with Docker Compose stack from Phase 01
  • Crew can check /health to diagnose which component (DB/Ollama/Claude) is unavailable
  • No blockers for remaining Phase 02 plans

Self-Check: PASSED

  • api.py: FOUND
  • 02-01-SUMMARY.md: FOUND
  • commit b72996d: FOUND

Phase: 02-operations-maintenance
Completed: 2026-03-24