Ion (zero install harness, runs on browser)

Ion is a new zero-install harness that operates entirely within Chromium-based browsers, requiring no installation. It's designed for quick tasks, even on phone browsers for file editing, and is limited to a single granted folder for safety, lacking MCP or terminal access. Ion offers basic tools, including checkpoints for reverting file changes, and connects to OpenAI-compatible servers. More details are available on its GitHub page.

Ion offers a unique zero-install, browser-based approach for quick tasks, unlike traditional agents that require installation and broader system access.