When you run Claude Code, Codex CLI or OpenCode in several folders at once, each session stops now and then to ask for permission, and you only find out when you look at its terminal. OpenCompanion starts those sessions, lists them on one screen, tells you when one is waiting, and lets you answer from the desktop or from your phone on the same Wi-Fi. No account, no cloud server, no telemetry. Open source (MIT), for Windows, Linux and macOS.