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NianAIGC/.project-docs/20-architecture/module-map.md
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# Module Map
## Source Layout
| Path | Responsibility | Owner Notes |
|---|---|---|
| `lib/server/database.ts` | Server-only PostgreSQL Pool, TLS, queries, transactions, readiness | Only deep database transport boundary for runtime stores. |
| `lib/server/{data-store,account-store,billing-store}.ts` | Domain persistence with PostgreSQL/local implementations | Preserve exported interfaces for callers. |
| `database/migrations/` | Immutable versioned PostgreSQL schema changes | Applied by `scripts/migrate-postgres.mjs`. |
| `scripts/postgres-client.mjs` | Validated database configuration for Node operations scripts | Shared by migration/bootstrap/import scripts. |
| `deploy/ack/` | ACK deployment resources and secret/config templates | Migration Job precedes Web/Worker rollout. |
| `app/api/ready/route.ts` | Database/schema/privilege readiness endpoint | Separate from process-level liveness. |
## Dependency Direction
- Routes and services depend on store interfaces; stores depend on the shared database adapter; the adapter does not depend on domain stores.
- Worker depends on the internal Web HTTP API, not the database module.
## Risky Or Sensitive Areas
- `database/migrations/` and the two concurrency-sensitive PostgreSQL functions.
- Account authentication/password transactions and billing wallet idempotency.
- ACK Secrets, RDS CA mounting, Ingress protection for internal Worker routes, and pool connection budgeting.
## Last Updated
2026-08-12