diff --git a/backlog/tasks/task-020 - Implement-Google-Data-Sovereignty-(Local-First-Encrypted-Storage).md b/backlog/tasks/task-020 - Implement-Google-Data-Sovereignty-(Local-First-Encrypted-Storage).md
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+---
+id: task-020
+title: Implement Google Data Sovereignty (Local-First Encrypted Storage)
+status: To Do
+assignee: []
+created_date: '2025-12-04 12:32'
+labels:
+  - feature
+  - security
+  - google-integration
+  - offline-storage
+dependencies: []
+priority: high
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+Implement secure, local-first storage for Google Workspace data (Gmail, Drive, Photos, Calendar) with client-side encryption, selective sharing to canvas boards, and optional R2 encrypted backup. See docs/GOOGLE_DATA_SOVEREIGNTY.md for full architecture.
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+<!-- AC:BEGIN -->
+- [ ] #1 IndexedDB schema created for encrypted Google data
+- [ ] #2 Key derivation from existing WebCrypto auth keys
+- [ ] #3 Google OAuth 2.0 with PKCE implemented
+- [ ] #4 Gmail messages can be imported and encrypted locally
+- [ ] #5 Drive documents can be imported and encrypted locally
+- [ ] #6 Photos thumbnails can be imported and encrypted locally
+- [ ] #7 Calendar events can be imported and encrypted locally
+- [ ] #8 Data can be selectively shared to canvas board (Automerge sync)
+- [ ] #9 Encrypted R2 backup and restore working
+- [ ] #10 Safari 7-day eviction mitigations in place
+- [ ] #11 Storage quota warnings implemented
+<!-- AC:END -->