- install.sh: run mosaic-ensure-excalidraw post-install (non-fatal) - runtime-setup.ts: configure excalidraw MCP during wizard setup - bin/mosaic-ensure-excalidraw: install deps + register MCP with Claude - runtime/mcp/EXCALIDRAW.json: MCP server config template - tools/excalidraw/: headless .excalidraw → SVG export server Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>