Change Management (Stable Interface / Deletion)

Use when

• Changing public APIs across layers (ports, facades, stores).
• Introducing a new pattern or architectural decision.

Workflow

1. Define minimal stable interface (MSI): smallest API callers need.
2. Prefer additive change; if breaking, include migration notes.
3. Add ADR-lite notes (what/why/risks) when boundaries change.
4. Verify deletion path: feature can be removed without global entanglement.

References

• .github/instructions/68-change-management-copilot-instructions.md