ADR-0114: PostgreSQL as source of truth

• Status: accepted
• Date: 2026-10-30
• French version: ../ADR-0114-postgresql.md

Context

Kit sections 6.2 and 2.

Decision

PostgreSQL holds metadata, governance, state, audit, Kill Switch and licences; versioned migrations sql/postgres/V<NNN>__<name>.sql, never changed once shipped. Client provided except in sandbox for navin-manager.

Consequences

PostgreSQL licence exception recorded.

Evidence

• sql/postgres
• services/control-plane/src/eai/migrate.py
• services/control-plane/tests/test_core_migrations.py
• RULES.md (section 4, point 5)