- Migrate to LangChain for model abstraction (@langchain/anthropic, @langchain/ollama)
- Add custom ChatCloudflare class for Cloudflare Workers AI
- Simplify API routes using unified LangChain interface
- Add session preferences API for storing user settings
- Add connection label preference (ask user once, remember for session)
- Add shape modification support (change entity shapes via AI)
- Add template setter to DiagramObject for shape changes
- Improve entity inference with fuzzy matching
- Map colors to 16 toolbox palette colors
- Limit conversation history to last 6 messages
- Fix model switching to accept display names
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Implement session management to maintain conversation history and entity
context across page refreshes. Sessions are stored in-memory and include:
- Conversation history (stored server-side, restored on reconnect)
- Entity snapshots synced before each message for LLM context
- Auto-injection of diagram state into Claude's system prompt
Key changes:
- Add session store service with create/resume/sync/clear operations
- Add session API endpoints (/api/session/*)
- Update Claude API to inject entity context and manage history
- Update ChatPanel to initialize sessions and sync entities
- Add debug endpoint for inspecting session state
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
