What is device daemon?

A device daemon is a background process that continuously monitors a connected device without manual intervention. ArgusTest's daemon runs on macOS as a LaunchAgent, watching the attached iOS device — capturing screenshots, streaming logs, and detecting crashes — and exposes that data to AI assistants through its MCP server.

Because it runs as a LaunchAgent, the daemon starts at login, recovers from crashes, and survives restarts — "set once, forget it."

It updates device state on a short interval, so the assistant always has a current picture of what the device is doing.