Create and manage Excalidraw diagrams via MCP for architecture visualization. Use when: excalidraw, whiteboard, visual diagram, hand-drawn diagram.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Excalidraw Skill
## Goal
Create, edit, and manage Excalidraw diagrams programmatically using the `@cmd8/excalidraw-mcp` server. Generate architecture diagrams, flowcharts, system maps, and wireframes with the hand-drawn Excalidraw aesthetic.
## Prerequisites
- **MCP Server**: `excalidraw` must be configured in your MCP config (see `templates/core/MCP_CONFIG_TEMPLATE.json`).
- **Runtime**: Node.js 18+
- **File**: A `.excalidraw` file path must be specified (created automatically if it doesn't exist).
## Capabilities
### MCP Tools Available
| Tool | Purpose |
|---|---|
| `createNode` | Create a shape (rectangle, ellipse, diamond) with label text. Returns node ID |
| `createEdge` | Create an arrow connecting two nodes by ID or label |
| `deleteElement` | Remove a node or edge by ID or label |
| `getFullDiagramState` | Get markdown representation of the full diagram (nodes, edges, frames, colors) |
### Supported Diagram Types
- **Architecture Diagrams**: C4 Context, Container, Component views
- **Flowcharts**: Decision trees, process flows, SDLC workflows
- **System Maps**: Microservice topology, network diagrams
- **Wireframes**: UI layout sketches, page flows
…
The line at the top of this page pins the label git:20261014.de0823c, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (3931 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag
Source
GitHub
andreibesleaga/gabbe · 23 stars · license a license file GitHub does not identify · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_smknxutqr55tn33g
GET https://markdownregistry.com/api/v1/resolve?ref=andreibesleaga/gabbe/excalidraw
GET https://markdownregistry.com/api/v1/blob/17e48c85e2284b831bbf7f63634b187b4cd69017ae2aeceb73ffb47e0501dbb3
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