Excalidraw Skill Step 0: Detect Connection Mode Before doing anything, determine which mode is available. Run these checks in order : Check 1: MCP Server (Best experience) If you see tools like → use MCP mode . Call MCP tools directly. Check 2: REST API (Fallback — works without MCP server) If you get → use REST API mode . Use HTTP endpoints ( / ) from the cheatsheet. Check 3: Nothing works → Guide user to install If neither works, tell the user: The Excalidraw canvas server is not running. To set up: 1. Clone: 2. Build: 3. Start canvas: 4. Open in a browser 5. (Recommended) Install the MCP s…