Writes valid excalidraw diagram source for uml-mcp (diagram_type=excalidraw). Excalidraw whiteboard-style diagrams Use when the user asks for excalidraw or that notation; then call validate_uml / generate_uml / generate_uml_image.
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 diagram (uml-mcp)
**`diagram_type`:** `excalidraw`
**Backend:** `excalidraw`
**Output formats:** svg
Excalidraw whiteboard-style diagrams
Load the workflow skill [uml-mcp-diagrams](../uml-mcp-diagrams/SKILL.md) for URL-first replies, progressive discovery, and which MCP tool to call. This file is notation only; it does not add an MCP tool.
## Styling
- Hand-drawn look is built-in; keep stroke colors high-contrast.
- No MCP `theme` param.
## Starter template
```excalidraw
{"type":"excalidraw","version":2,"source":"kroki","elements":[{"id":"r1","type":"rectangle","x":50,"y":50,"width":150,"height":80,"angle":0,"strokeColor":"#000","backgroundColor":"#fff","fillStyle":"solid"},{"id":"t1","type":"text","x":80,"y":78,"text":"Label","fontSize":20}],"appState":{"viewBackgroundColor":"#fff"},"files":{}}
```
## Example
```excalidraw
…
The line at the top of this page pins the label git:20261023.634e385, 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 (1972 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
antoinebou12/uml-mcp · 109 stars · license MIT · pushed 2026-11-07 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_wygczbdxpvexmibk
GET https://markdownregistry.com/api/v1/resolve?ref=antoinebou12/uml-mcp/excalidraw
GET https://markdownregistry.com/api/v1/blob/5b22eff88b31701d7a9a45f9ebf402ae570a340c51803a7c0b14e4a6a7697ffd
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
antoinebou12/uml-mcp · .github/skills/uml-mcp-agent-trace/SKILL.md · Draw agent run traces with LLM, tool, retrieval and sub-agent steps on a timeline (agent_trace).
antoinebou12/uml-mcp · .github/skills/uml-mcp-batch/SKILL.md · Render and verify diagram batches and consistent multi-format architecture conversions, including four C4 levels.
antoinebou12/uml-mcp · .github/skills/uml-mcp-c4-model/SKILL.md · Draw a C4 model readers can drill into, from context to containers to components (c4_model).
antoinebou12/uml-mcp · .github/skills/uml-mcp-d3-plugins/SKILL.md · Discover installed D3 plugins and render architecture diagrams with cloud and AI logos in the MCP App.
antoinebou12/uml-mcp · .github/skills/uml-mcp-plantuml-c4/SKILL.md · Build and verify PlantUML and all four C4 levels with readable SVG labels, valid themes and usable previews.
taracodlabs/aiden · workspace-templates/skills/excalidraw/SKILL.md · Create hand-drawn style diagrams and sketches in Excalidraw JSON format for architecture, flowcharts, and system design
agents365-ai/365-skills · plugins/excalidraw/skills/excalidraw-skill/SKILL.md · Use when user requests diagrams, flowcharts, architecture charts, or visualizations. Also use proactively when…
naveedharri/benai-skills · plugins/all-skills/skills/excalidraw/SKILL.md · Create visual presentations, slide decks, and explanatory diagrams in Excalidraw. Use when user asks to create a…
naveedharri/benai-skills · plugins/creative/skills/excalidraw/SKILL.md · Create visual presentations, slide decks, and explanatory diagrams in Excalidraw. Use when user asks to create a…
metaspartan/cybara · skills/excalidraw/SKILL.md · Hand-drawn-style diagrams and sketches via the Excalidraw format (.excalidraw JSON), exportable to SVG/PNG. Use for…
andreibesleaga/gabbe · plugins/gabbe-coding/skills/excalidraw/SKILL.md · Create and manage Excalidraw diagrams via MCP for architecture visualization. Use when: excalidraw, whiteboard, visual…
