phase 16 implementation

docs/phase16/PHASE_15_RECOMMENDATION_REVIEW_v1.0.md

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+# Phase 15 Recommendation Review
+
+## Decision
+
+**Phase 15 recommendation upheld: Not ready for production launch.**
+
+The Phase 15 evidence reports 1 unresolved Critical, 21 unresolved High, 17 unresolved Medium, and 2 unresolved Low cumulative issues. The Phase 15 defect register has four resolved findings and one open High aggregate acceptance blocker, `P15-005`.
+
+## Verification performed in Phase 16
+
+- Verified the supplied Phase 15 manifest before modification.
+- Executed 18 dependency-free repository, contract, localization, route, RTL, content, integration, environment, security, privacy, metadata, and static-audit commands successfully.
+- Confirmed zero static secret-scan findings in the final source tree at the time of review.
+- Attempted to provision pnpm 11.9.0 through Corepack; the registry request failed because the environment has no package-registry access.
+- Confirmed the available runtime is Node 22.16.0 rather than the required Node 24.17.0.
+
+## Result
+
+The engineering evidence gap is reduced but not closed. Dependency-backed tests, browsers, accessibility automation, visual baselines, performance measurement, production build, deployment rehearsal, rollback rehearsal, and human review remain unexecuted. Business, legal, operational, and infrastructure approvals remain absent.
+
+Input archive SHA-256: `e3a0773b9783a551ef96e9ec8acc61ba53a4200e9be24509c260099522ac1d5b`.