178 / 279 · Module 12 — Idempotency and Duplicate Prevention · filtered: code← prev⊞ allnext →12.53Test 6 — stale versionCurrent Salesforce: version = 10 Send: version = 9 Verify: ignored/rejected Then send: version = 11 Verify update applies. ← Previous12.21 Event deduplicationNext →13.3 Basic MUnit test structure