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mercadodevida/work/artifacts/F-002/architect.md
rikrdo 425fedd13e feat(F-002): database foundation with migrations and dev compose 
- node-pg-migrate + pg: baseline migration (extensions, app_meta) with working down
- src/infrastructure/db fail-fast pool and typed query helper
- docker-compose: postgres:16-alpine + redis:7-alpine with one-command up
- table naming convention <module>_<table> documented in README
- integration tests (6) against real PostgreSQL; strict identifier validation
  for test DDL after security-gate hardening round
- deps justified in spec/tech.md; all gates approved; verify.sh green
2026-08-14 22:00:16 +02:00

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Architect — F-002 Database foundation with module-owned schemas

done -> work/artifacts/F-002/architect.md

Decision summary

  • Migration tool: node-pg-migrate + pg driver. Pure npm deps, boring, up/down support, version table owned by the tool.
  • Single PostgreSQL instance, module ownership by table prefix (<module>_<table>). No per-module PG schemas — simplicity first; prefix rule documented and exemplified.
  • Baseline migration only ships foundation objects (extensions + app_meta). Business tables arrive with their modules.
  • Dev environment: docker-compose with postgres:16-alpine + redis:7-alpine, one command up.
  • Env via Node 22 --env-file; fail fast when DATABASE_URL missing. Integration tests skip explicitly when TEST_DATABASE_URL absent — no silent magic.

Expected blast radius

EXPECTED BLAST RADIUS

Modules modified: src/infrastructure/db (new)
Modules indirectly affected: none (no HTTP API, no business modules)
Database changes: baseline migration (extensions, app_meta) - greenfield
API changes: none
Events added/changed: none
Risk level: low

Handoff to implementer

Follow specs/F-002-database-foundation/TASKS.md. Docker daemon is available (verified at intake). Definition of done for build stage: compose up green, migrations up/down/up demonstrated against real PostgreSQL, integration tests passing with TEST_DATABASE_URL, and evidence in implementer.md.