Show HN: Crack – Turn your MacBook into a squeaky door

Crack is a free, open-source macOS app that uses the MacBook's built-in AppleHID lid sensor at 60fps to play sound effects—like squeaky door creaks—mapped to lid movement velocity. It runs natively in Swift with AVAudioEngine, uses under 1 MB and near-zero CPU, and operates entirely from the menu bar with no tracking or telemetry.