Add per-agent whiteboard using tldraw#751
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Implements a per-agent whiteboard as a new center-pane tab alongside Terminal and Changes. Uses tldraw v5 for the canvas (React.lazy code-split) and @tldraw/tlschema for server-side shape construction, enabling agents to draw diagrams via MCP tools without a browser. Backend: DB migration (whiteboards table with optimistic locking), whiteboard builder (~230 LOC translating WhiteboardOps to tldraw records), REST API (GET/PUT/snapshot), MCP tools (whiteboard_get, whiteboard_update), SSE sync (whiteboard.changed events). Frontend: tldraw canvas with debounced save (2s) and snapshot export (4s), pointer-down deferral for mid-gesture updates, theme-aware (colorScheme prop), agent-drew violet dot indicator on tab, lazy-loaded pane with Suspense fallback, full routing integration. Tests: 31 unit tests (builder ops, simplifyElements), 3 E2E tests (tab rendering, API CRUD, deep-link routing). All 181 E2E tests pass. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Closing — tldraw requires a commercial license for production use, so this isn't viable. Going with the Excalidraw implementation in #735 instead. |
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Summary
@tldraw/tlschema), REST API with optimistic locking, MCP tools (whiteboard_get,whiteboard_update), SSE syncKey design decisions
WhiteboardOpoperations regardless of which canvas library ships@tldraw/tlschemadirectly (~230 lines vs Excalidraw's ~1,220 lines of coordinate math)React.lazy— tldraw chunk (~1.7MB) only loads when the whiteboard tab is openedTest plan
pnpm run check— all type checks pass (server + web + scripts)pnpm run finalize:web— production build succeedspnpm run test— 31 whiteboard unit tests passpnpm run test:e2e— all 181 E2E tests pass (3 new whiteboard tests)