Why:
- Establish the application-owned relational source of truth for tenants, authentication, ingestion, audit, graph runs, LLM usage, and feedback.
Changes:
- Define SQLAlchemy 2.x and Alembic conventions.
- Specify tenant, API-key, ingestion, audit, graph-run, pricing, usage, and feedback tables.
- Document indexing, retention, privacy, and multitenancy rules.
Impact:
- Postgres schema changes must be implemented through Alembic migrations.
- FastAPI must not run DDL during startup.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Why:
- Design the LangGraph-based insurance chatbot: retrieval-grounded
answering, grounded clarification, and handoff to a human assistant
owned by the existing main backend.
Changes:
- ADR-0006: graph nodes/edges, escalation triggers, and the
backend-owned handoff signal contract.
- ADR-0007: Postgres checkpointer, thread model (thread_id as the
shared identifier), history trimming strategy, and cross-thread
user memory via the Store.
Impact:
- Design-only; no code changes yet.
