From 17250fe05605387758d5f3e96fdc8b949b689855 Mon Sep 17 00:00:00 2001 From: Jeff Emmett Date: Thu, 4 Dec 2025 19:42:48 -0800 Subject: [PATCH] Update task task-027 --- ...rge-CRDT-sync-for-offline-first-support.md | 30 +++++++++++++++++-- 1 file changed, 28 insertions(+), 2 deletions(-) diff --git a/backlog/tasks/task-027 - Implement-proper-Automerge-CRDT-sync-for-offline-first-support.md b/backlog/tasks/task-027 - Implement-proper-Automerge-CRDT-sync-for-offline-first-support.md index 5e4b694..435c041 100644 --- a/backlog/tasks/task-027 - Implement-proper-Automerge-CRDT-sync-for-offline-first-support.md +++ b/backlog/tasks/task-027 - Implement-proper-Automerge-CRDT-sync-for-offline-first-support.md @@ -4,6 +4,7 @@ title: Implement proper Automerge CRDT sync for offline-first support status: In Progress assignee: [] created_date: '2025-12-04 21:06' +updated_date: '2025-12-05 03:42' labels: - offline-sync - crdt @@ -25,10 +26,35 @@ Solution: Use Automerge's native binary sync protocol with proper CRDT merge sem ## Acceptance Criteria -- [ ] #1 Server stores Automerge binary documents in R2 (not JSON) +- [x] #1 Server stores Automerge binary documents in R2 (not JSON) - [ ] #2 Client-server communication uses Automerge sync protocol (binary messages) - [ ] #3 Deletions persist correctly when offline client reconnects - [ ] #4 Concurrent edits merge deterministically without data loss -- [ ] #5 Existing JSON rooms are migrated to Automerge format +- [x] #5 Existing JSON rooms are migrated to Automerge format - [ ] #6 All existing functionality continues to work + +## Implementation Notes + + +## Progress Update (2025-12-04) + +### Implemented: +1. **automerge-init.ts** - WASM initialization for Cloudflare Workers using slim variant +2. **automerge-sync-manager.ts** - Core CRDT sync manager with proper merge semantics +3. **automerge-r2-storage.ts** - Binary R2 storage for Automerge documents +4. **wasm.d.ts** - TypeScript declarations for WASM imports + +### Integration Fixes: +- `getDocument()` now returns CRDT document when sync manager is active +- `handleBinaryMessage()` syncs `currentDoc` with CRDT state after updates +- `schedulePersistToR2()` delegates to sync manager when CRDT mode is enabled +- Fixed CloudflareAdapter TypeScript errors (peer-candidate peerMetadata) + +### Current State: +- `useCrdtSync = true` flag is enabled +- Worker compiles and runs successfully +- JSON sync fallback works for backward compatibility +- Binary sync infrastructure is in place +- Needs production testing with multi-client sync and delete operations +