drawio-desktop is an Electron-based desktop application that wraps the core draw.io diagramming editor (included as a git submodule). It provides a fully offline diagramming experience with a security-first design: Content Security Policy prevents remote script execution, IPC is gated through contextBridge with sender validation, and file operations enforce path authorisation against symlink attacks. The application supports CLI-based batch export (PNG, PDF, SVG, HTML, XML) with a hand-rolled argument parser, per-window file watching, auto-update via electron-updater, and platform-specific builds for Windows (x64/arm64, MSI, NSIS, APPX), macOS (dmg, zip, Quick Look preview), and Linux (AppImage, deb, rpm, snap). The architecture is a monolithic Electron main process (src/main/electron.js) communicating with the renderer (drawio submodule) through a secure IPC bridge. The codebase demonstrates high craftsmanship in security-sensitive areas such as backup file writes using exclusive temp files and rename, CLI export symlink handling, and per-window file watch registry. It is actively maintained with recent commits and comprehensive CI/CD pipelines.

The drawio-mcp repository provides a comprehensive ecosystem for AI-assisted diagram creation using the Model Context Protocol (MCP). It consists of four integrated approaches: an MCP App Server for inline diagram rendering in AI chat interfaces (deployable as Node.js or Cloudflare Worker), an MCP Tool Server for opening diagrams in the draw.io browser editor, assistant-specific plugins for Claude Code, Codex, and GitHub Copilot, and project instructions for Python-based diagram generation. The system enables AI assistants to create diagrams from Mermaid or XML input, apply layouts (ELK/libavoid), and export to various formats while emphasizing data residency controls—self-hosted options keep all diagram data local, with cloud export requiring explicit user action via draw.io Desktop CLI.