Eclipse Theia

Eclipse Theia is an Eclipse open source project providing the Theia Platform and the Theia IDE. The Eclipse Theia Platform is a free and open-source framework for building IDEs and tools based on web technologies. Theia-based applications can be deployed as desktop and web applications. It is implemented in TypeScript and emphasizes extensibility. With Theia AI, the platform provides explicit support for building tools and IDEs with artificial intelligence (AI) capabilities. The Eclipse Theia IDE is an IDE for desktop devices and the cloud based on the Theia platform, an open alternative to Visual Studio Code. It features a highly customizable developer experience and uses Theia AI to support AI features (also referred to as the AI-powered Theia IDE, an open alternative to GitHub Copilot or Cursor). The AI-powered Theia IDE includes Theia Coder, an open, adaptable and transparent AI coding assistant and integrates the Model Context Protocol (MCP) and Claude Code. While Eclipse Theia incorporates certain components from Visual Studio Code, such as the Monaco editor, it is independently developed with a modular architecture and is not a fork of VS Code.