Backgrind is a versatile overlay window designed for AI coding agents, tailored for both vibe coders and professional developers on macOS and Windows platforms. It allows for AI tools like Claude Code, Cursor, or its proprietary Grindy model to remain in an always-visible window that hovers above your active tasks, enabling you to initiate a task, engage in coding or leisure activities, and only receive notifications when the AI requires your input. This innovative solution serves as a lightweight interface for the command-line tools you already utilize, preserving your login credentials, history, hooks, and overall workflow while seamlessly integrating with your editor, web browser, documentation, or even during immersive full-screen gaming sessions. The window is highly customizable; you can drag it around, resize it, change its colors, adjust its transparency, summon it using a hotkey, or activate a click-through mode that allows your clicks and keystrokes to interact directly with the applications beneath it. Notifications are subtle, with the window only flashing or chiming when your AI agent requests approval, poses a question, or completes a task. Additionally, Backgrind functions like a compact integrated development environment (IDE), featuring a file tree, syntax-highlighted previews, rendered Markdown content, and clickable links to files, making it an invaluable tool for developers. This unique blend of functionality and accessibility ensures that you stay focused on your projects without being overwhelmed by interruptions.