Idempotency key support on all mutating Skill API endpoints to enable safe retries. References: PRD §5.2 ## Acceptance Criteria - [ ] All create/update operations accept optional idempotency_key (UUID) - [ ] Duplicate requests within 24-hour window with same key return original response without re-executing
Idempotency key support on all mutating Skill API endpoints to enable safe retries.
References: PRD §5.2
Acceptance Criteria