A distributed workflow needs a localized repair without weakening observability or rollback safety. The affected area is collaboration flow.
Repair the collaboration flow command handling implementation so it accepts first operations, recognizes safe repeats, and rejects key reuse with a different payload.
Evidence
- Affected surface: Balanced full-stack / collaboration flow.
- Observed failure family: enforce idempotent operations.
- Scope policy: retained must equal true.