A high school student frustrated with Google Antigravity's usage limits has created OpenGravity, an open-source alternative that recreates the popular UI with a Bring Your Own Key approach. The developer built the lightweight IDE using pure HTML/CSS/JS to avoid installation requirements while maintaining the functionality needed for autonomous coding projects.

The project leverages the WebContainer API and xterm.js to provide a real Linux environment in the browser, enabling file system synchronization and an autonomous agent capable of running commands and editing files. Currently in alpha stage, OpenGravity only supports Gemini API models and has placeholder UI elements that need refinement.

While the creator pauses development to focus on GCSE exams, the project remains open source under GPL-3.0. The community is invited to improve the agent logic, add support for additional AI providers, and implement missing features like Git integration and a proper settings panel.