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Implementation Plan: 005-postgres-database-replacement

Scope​

  • Transition from 004-containerized-compose-runtime to 005-postgres-database-replacement.
  • Track focus: architecture.
  • Replace H2 runtime with PostgreSQL while preserving baseline functional behavior.

Deliverables​

  1. Requirement deltas in requirements/.
  2. Contract deltas in contracts/.
  3. Architecture and topology deltas in system/.
  4. Generation hook implementation in pipeline/generate-state-005-postgres-database-replacement.sh.
  5. Runtime scripts (start/stop/status) for generated state 005.
  6. Smoke test implementation in scripts/test-state-005-postgres-database-replacement.sh.
  7. ADR documenting database engine decision.

Exit Criteria​

  • Spec and tasks are complete.
  • Generation hook produces expected PostgreSQL runtime artifacts.
  • Smoke tests pass for this state.
  • State is publishable to code/generated-state-005-postgres-database-replacement.