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_bmad-output/implementation-artifacts/spec-gdpr-analytics-sync.md

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+---
+status: in-progress
+title: "GDPR Analytics Sync + Error Reporting Hardening"
+story: 4.1-gdpr-analytics-sync
+epic: 4
+priority: high
+blast_radius: medium
+---
+
+# Spec: GDPR Analytics Sync + Error Reporting Hardening
+
+## Context
+
+Deferred work from Story 4.1 (GDPR Cookie Consent):
+- AC5 anonymousAnalytics DB sync was not implemented
+- Original constraint: "zero DB writes in 4.1, 100% client consent"
+- Now removing constraint to implement proper sync
+
+## Goals
+
+1. **Primary**: Sync cookie consent `anonymousAnalytics` to database for authenticated users
+2. **Secondary**: Verify error reporting is properly wired (legitimate interest, no consent needed)
+
+## Acceptance Criteria
+
+### AC1: Authenticated user consent syncs to DB
+- When a logged-in user accepts/rejects analytics via banner or preferences, `UserAISettings.anonymousAnalytics` is updated in DB
+- Guest users (no session) continue using localStorage only
+
+### AC2: Cross-device consistency
+- User's analytics consent persists across devices when logged in
+- Initial consent load prefers DB value when local storage is empty
+
+### AC3: Error reporting verification
+- Existing error reporting continues to work without consent (legitimate interest)
+- Verify `/api/debug/client-error` route exists and is wired
+
+## Tasks
+
+- [ ] Task 1: Create server action for consent sync
+- [ ] Task 2: Update cookie consent utilities
+- [ ] Task 3: Update banner and dialog components
+- [ ] Task 4: Verify error reporting route
+
+## Code Map
+
+### New/Modified Files
+
+| File | Change |
+|------|--------|
+| `lib/consent/cookie-consent.ts` | Add `saveConsentWithSync()` client wrapper |
+| `app/actions/cookie-consent.ts` | NEW - Server action for DB sync |
+| `components/legal/cookie-consent-banner.tsx` | Use new sync action |
+| `components/legal/cookie-preferences-dialog.tsx` | Use new sync action |
+| `app/api/debug/client-error/route.ts` | Verify exists |
+
+### Design Notes
+
+- Server action calls `updateAISettings({ anonymousAnalytics: boolean })`
+- Client-side: combine `setConsent()` + server action in parallel
+- Server action silently succeeds for guests (no session) — component ignores result
+- Error reporting uses `/api/debug/client-error` — already exists, no consent gate needed
+
+## Spec Change Log
+
+- 2026-05-30: Created spec for deferred AC5 implementation
+- 2026-05-30: Added error reporting verification as secondary goal
+
+## Dev Agent Record
+
+### Agent Model Used
+Claude Opus 4.8
+
+### Completion Notes List