Adrafinil keeps a lid-closed Mac awake only while agents are running.

This narrow Show HN utility pulled 113 points and 72 comments by solving a real pain: keep a closed MacBook awake for exactly the duration background coding agents are working, then let it sleep (GitHub). The engagement is the signal. A lot of people now run long-lived local agents overnight and hit the macOS power-management wall. The comment thread is basically a field guide to running overnight agent jobs on Apple hardware. If you're babysitting caffeinate to keep nightly runs alive, this is more precise.