Core platform services for context pipeline, authentication, and analytics.
- Primary DB: PostgreSQL 16 + pgvector (HNSW indexes)
- Cache: Redis
- Analytics ingestion: MongoDB Atlas (approved exception, see ADR-001)
- Queue: BullMQ
See .decisions/ for all documented ADRs.
Key constraint: MongoDB is prohibited in all core services. The analytics ingestion pipeline (src/services/analytics-events.ts) is the only approved MongoDB exception per ADR-001.