> ## Documentation Index
> Fetch the complete documentation index at: https://docs.myrmagent.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Diagrams via MCP

> Use Excalidraw or tldraw MCP servers for editable whiteboards — no built-in canvas required.

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.

## 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

## Recommended MCP extensions

| Use case                   | MCP                                                                        | Notes                                                   |
| -------------------------- | -------------------------------------------------------------------------- | ------------------------------------------------------- |
| Hand-drawn diagrams        | [Excalidraw MCP App](https://github.com/excalidraw/excalidraw-mcp)         | Official remote HTTP extension; also supported by Goose |
| Programmatic `.tldr` files | [tldraw-mcp-server](https://github.com/AndresMuelas2004/tldraw-mcp-server) | Node.js; 30 tools, no browser required                  |
| Codex-style widget canvas  | [Cowart](https://github.com/zhongerxin/cowart)                             | Codex plugin + MCP widget (reference only)              |

## 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.

## 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.