What is navi-agent?

Navi is a small desktop app for Windows that gives AI coding agents like Claude Code a way to get your attention, styled after the fairy companion from a well known video game. She floats on your screen as a small transparent overlay, and when an agent needs you, she rings a chime, changes color, and shows a message in a speech bubble instead of you having to keep watching a terminal window. Under the hood, one Electron application does two jobs at once. It runs a small local server that speaks the MCP protocol, the same standard used to connect AI agents to external tools, exposing a single function that lets an agent send a message with an urgency level of urgent, warning, or success. The same app also draws the floating fairy overlay window itself, which glows and drifts around a corner of the screen while idle and can be dragged anywhere. Because it relies on a transparent always on top window and audio playback, Navi only runs on Windows 10 or 11 with Node.js installed. Agents connecting to it do not need to run on the same machine though, since anything that can reach the right network port works, including agents running inside WSL2 on the same PC. Setup involves installing dependencies, starting the app, and registering it with your agent using a short command that Navi's own speech bubble displays for you. The README notes a couple of limitations: the notification server listens on all network interfaces by default, so anyone on the same local network could trigger a notification unless you firewall the port, and the always on top window will not appear over a game running in exclusive fullscreen mode.