I work from cafés and libraries a lot and hated leaving my MacBook alone for bathroom breaks, so I built crookcooked.

Arm it and the Mac locks. If someone messes with it, it screams, records them, and sends the clip plus a live view to your iPhone. Video is encrypted and sent over local network.

Open source, mostly vibe coded. I find myself using it quite often and thought it could be useful to other people as well!