phase 16 implementation

2026-06-25 20:08:39 -04:00
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+# Phase 15 Idempotency and Duplicate Report
+
+**Date:** 2026-06-25  
+**Status:** Local static design reviewed; production gate blocked
+
+## Summary
+
+The current process-local store coalesces repeated keys, caches non-retryable results, removes retryable failures, and contains no personal data in keys. It is explicitly test/local only.
+
+## Executed evidence
+
+- Historical Phase 14 integration test covered repeated transport.
+- Source review confirms retryable failures release the key.
+
+## Unexecuted or blocked evidence
+
+- Current integration/browser retry execution.
+- Distributed durable store, late vendor success, cross-instance duplicate policy, legitimate later request policy.
+
+## Release disposition
+
+P14-004 blocks scaled production.