opensumi/core

OpenSumi is a TypeScript framework for building code editors and integrated development environments (IDEs), the kind of application developers use to write software. Rather than building one specific editor, it provides the building blocks so that teams can construct their own IDE products with a shared foundation. It comes from Alibaba and Ant Group and is released under the MIT license. The framework supports two deployment targets: a desktop app built with Electron (the same technology that powers VS Code) and a browser-based web editor that runs entirely in the browser without any installation. Several example starter projects in the README show both options, including a cloud IDE, a desktop IDE, a pure web IDE, and a minimal browser-only variant. A notable feature is built-in support for AI tooling. The framework acts as a client for the Model Context Protocol (MCP), an open standard that lets editors communicate with AI model servers. This means an IDE built on OpenSumi can connect to AI tools that expose themselves via that protocol, letting the editor use AI features without each one needing custom integration work. Development setup uses Yarn. After installing dependencies and running an init script, you start the dev server and it opens a workspace folder by default. You can point it at any local directory by setting an environment variable before running. Full documentation lives at opensumi.com. A changelog tracks releases and breaking changes. The project welcomes outside contributors and maintains a list of issues labeled for newcomers. It has been active since 2019.