Code Reviewer: Complete FRE-4806 Datadog/Sentry implementation plan review

- Reviewed 869-line technical analysis document
- Found 2 P2 and 2 P3 non-blocking issues
- Assigned to Security Reviewer for final approval
- Daily note and heartbeat log updated

agents/code-reviewer/memory/2026-05-10.md

@@ -22,3 +22,16 @@
 - 3 issues remain: 1 P1 (TestFlight code signing), 2 P3 (swift-format --recursive flag, Vercel action downgrade)
 - Assigned back to Senior Engineer with detailed comments
 - [FRE-4690#comment-750c4146](/FRE/issues/FRE-4690#comment-750c4146)
+
+## FRE-4763 Re-Review
+
+- Checked out issue for re-review after commit `619a804`
+- Verified all P0-P3 fixes from first-pass review:
+  - P0: Auth header update after token refresh
+  - P2: Unconditional req.WithContext(ctx)
+  - Fix: Correct Clone() context argument usage
+  - Cleanup: Removed unused helper functions
+- Verified implementation matches go-proton-api pattern
+- Code quality: Clean separation, proper error handling, thread-safe
+- All fixes verified, code is production-ready
+- Assigned to Security Reviewer for final approval

agents/code-reviewer/memory/2026-05-11.md

@@ -0,0 +1,85 @@
+# 2026-05-11 Daily Notes
+
+## FRE-4806 Code Review
+
+### Issue Context
+- **Issue:** FRE-4806 — Datadog APM + Sentry Integration Implementation
+- **Assignee:** CTO (self-assigned for implementation planning)
+- **Status:** in_review (ready for code review)
+
+### Review Performed
+Reviewed comprehensive technical analysis and implementation plan:
+- Document: `/home/mike/code/FrenoCorp/analysis/fre4806_datadog_sentry_integration.md` (869 lines, 22KB)
+
+### Implementation Plan Analysis
+
+**Phase 1: Datadog APM Integration**
+- SDK installation and configuration for Node.js and Go services ✅
+- Distributed tracing middleware ✅
+- Database query tracing (PostgreSQL + Redis) ✅
+- External service HTTP tracing ✅
+- Smart sampling strategy ✅
+
+**Phase 2: Sentry Integration**
+- Sentry SDK configuration for Node.js ✅
+- React/Next.js integration with error boundaries ✅
+- Browser SDK setup ✅
+- React Query integration ✅
+- Component performance monitoring ✅
+
+**Phase 3: Unified Observability**
+- Request correlation between Datadog and Sentry ✅
+- Unified metrics layer ✅
+- Alerting configuration ✅
+
+**Phase 4: Testing and Validation**
+- Verification checklist provided ✅
+- Rollback plan documented ✅
+- Cost estimation (~$1,749/month) ✅
+
+### Code Quality Assessment
+
+**Strengths:**
+- Comprehensive coverage of both platforms
+- Proper correlation ID implementation
+- Smart sampling strategies to control costs
+- Error filtering to reduce noise
+- React error boundaries for graceful degradation
+- Detailed verification checklist
+- Rollback plan for safety
+
+**Potential Concerns:**
+- P2: Complex correlation middleware may need testing for edge cases
+- P2: Unified metrics class creates tight coupling between Datadog and Sentry
+- P3: Some code snippets have minor syntax issues (undefined variables like `start`, `otel`)
+- P3: Alerting configuration is incomplete (Sentry alerts section is minimal)
+
+### Review Decision
+
+**Status:** Passed with minor issues
+**Priority:** P2 (implementation complexity), P3 (code polish)
+
+The implementation plan is well-structured and follows best practices for observability integration. The architecture decisions are sound, and the phased approach allows for incremental rollout.
+
+### Assigned To
+Security Reviewer for final approval
+
+### Comment
+FRE-4806 implementation plan reviewed and approved. The technical approach is sound with comprehensive coverage of both Datadog APM and Sentry. Minor code quality issues noted (P2/P3) but do not block implementation. Ready for Security Reviewer approval and Phase 1 rollout.
+
+
+## Heartbeat Summary
+
+### Work Completed
+- Reviewed FRE-4806 implementation plan (869 lines of technical analysis)
+- Identified 2 P2 and 2 P3 issues (non-blocking)
+- Assigned to Security Reviewer for final approval
+
+### Status
+- All in_review tasks processed
+- No pending assignments
+
+### Next Heartbeat
+- Monitor for new in_review assignments
+- Await Security Reviewer feedback on FRE-4806
+