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Myrm does not ship a built-in infinite whiteboard. For architecture sketches, flowcharts, and collaborative diagrams, connect an MCP server and keep the core product lean.

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Built-in alternatives (no MCP)

  • Mermaid artifacts in chat — mind maps, flowcharts, sequence diagrams, Gantt charts
  • render_ui — structured in-chat UI (forms, tables, charts) via A2UI
  • HTML / SVG artifacts — exportable, shareable documents
Use caseMCPNotes
Hand-drawn diagramsExcalidraw MCP AppOfficial remote HTTP extension; also supported by Goose
Programmatic .tldr filestldraw-mcp-serverNode.js; 30 tools, no browser required
Codex-style widget canvasCowartCodex plugin + MCP widget (reference only)

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Setup (Settings → MCP)

  1. Add a remote MCP server URL (Excalidraw MCP App) or run a local stdio server (tldraw / excalidraw-mcp-server).
  2. Enable the MCP on your agent profile.
  3. Ask the agent to create or edit diagrams through MCP tools — persistence lives in the MCP app, not in Myrm server storage.

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Migration from legacy Canvas

If you previously enabled the removed Canvas builtin tool, it is silently stripped from saved profiles. Use Mermaid for quick diagrams or install Excalidraw MCP for editable whiteboards.