Each services/*/CLAUDE.md declares `## Port: NNNN` — the authoritative
per-service port spec (docs/PORT_SCHEMA.md is explicitly partially
aspirational). This audit verifies:
1. Declared port appears as a literal in the service's own source
(catches: moved port in code but forgot to update CLAUDE.md).
2. No two services claim the same port (catches: accidental
collision when scaffolding new services).
Current state: ✓ 15 services, all declared ports found in code, zero
collisions (mana-auth/geocoding/stt/tts/image-gen/voice-bot/mail/
credits/user/subscriptions/analytics/events/news-ingester/ai/research).
Report-only; not a CI gate. Run with `pnpm run audit:port-drift`.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>