What is antigravity-safe-yolo-sandbox?

This project is a bootstrap script that lets you run Google Antigravity, an AI coding agent, in its full autonomous mode without putting your own computer at risk. Autonomous mode, sometimes called YOLO mode, gives the AI agent permission to make changes without asking for approval each time, which is powerful but also risky if something goes wrong. This script solves that problem by running the agent inside an isolated Windows Sandbox instead of directly on your machine. Because everything happens inside a temporary virtual machine, your actual operating system stays protected even if the AI agent makes a mistake or misbehaves. The script automatically carries your existing login credentials into the sandbox so you do not have to sign in twice, and when you are done, it merges your conversation history and settings back to your host computer before the sandbox closes. It also installs a modern terminal inside the sandbox to avoid display glitches, and installs Node.js so tools that rely on the Model Context Protocol work correctly. Setup requires Windows 10 or 11 Pro, Enterprise, or Education, since the Home edition does not support Windows Sandbox. You also need Windows Sandbox turned on through Windows features, and the Antigravity agent already installed and signed in on your host machine. To use it, you place the launch script into the folder of the project you want the agent to work on and double click it, which builds and starts the sandbox automatically. The README includes an important warning. While your main operating system stays fully protected, the specific project folder you launch the script from is shared with the sandbox and can be freely modified or deleted by the AI agent. The author strongly recommends using version control before letting the agent work unsupervised, and takes no responsibility for lost data or broken code.