Workshop Day 4 — Working with MCP

This is the starter repo for Day 4 of the Agentic IDE workshop series. It is a fork of Excalidraw extended with Day 4 scaffolding for Model Context Protocol (MCP).

Slides: koldovsky/is-04-slidev-mcp

Day 4 entry points:

• .cursor/mcp.json.example — copy to .cursor/mcp.json (gitignored) to enable
• mcp-examples/excalidraw-scenes-ts/ — TypeScript starter MCP server
• mcp-examples/excalidraw-scenes-py/ — Python starter MCP server
• docs/mcp/SECURITY.md — per-MCP threat model
• docs/mcp-testing/ — A/B test results
• AGENTS.md — Skills (from Day 3) + MCPs (Day 4) overview

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Excalidraw Editor | Blog | Documentation | Excalidraw+

Features

The Excalidraw editor (npm package) supports:

• 💯 Free & open-source.
• 🎨 Infinite, canvas-based whiteboard.
• ✍️ Hand-drawn like style.
• 🌓 Dark mode.
• 🏗️ Customizable.
• 📷 Image support.
• 😀 Shape libraries support.
• 🌐 Localization (i18n) support.
• 🖼️ Export to PNG, SVG & clipboard.
• 💾 Open format - export drawings as an .excalidraw json file.
• ⚒️ Wide range of tools - rectangle, circle, diamond, arrow, line, free-draw, eraser…
• ➡️ Arrow-binding & labeled arrows.
• 🔙 Undo / Redo.
• 🔍 Zoom and panning support.

Excalidraw.com

The app hosted at excalidraw.com is a minimal showcase of what you can build with Excalidraw. Its source code is part of this repository as well, and the app features:

• 📡 PWA support (works offline).
• 🤼 Real-time collaboration.
• 🔒 End-to-end encryption.
• 💾 Local-first support (autosaves to the browser).
• 🔗 Shareable links (export to a readonly link you can share with others).

We’ll be adding these features as drop-in plugins for the npm package in the future.

Quick start

Note: following instructions are for installing the Excalidraw npm package when integrating Excalidraw into your own app. To run the repository locally for development, please refer to our Development Guide.

Use npm or yarn to install the package.

npm install react react-dom @excalidraw/excalidraw
# or
yarn add react react-dom @excalidraw/excalidraw

Check out our documentation for more details!

Contributing

• Missing something or found a bug? Report here.
• Want to contribute? Check out our contribution guide or let us know on Discord.
• Want to help with translations? See the translation guide.

Integrations

• VScode extension
• npm package

Who’s integrating Excalidraw

Google Cloud • Meta • CodeSandbox • Obsidian Excalidraw • Replit • Slite • Notion • HackerRank • and many others

Sponsors & support

If you like the project, you can become a sponsor at Open Collective or use Excalidraw+.

Thank you for supporting Excalidraw

Last but not least, we’re thankful to these companies for offering their services for free: