Evenpine · Clamshell Manager for macOS

Close the lid.
Leave the light on.

A menu bar app that keeps your MacBook working with the lid shut, and puts it back to sleep the moment it should. We are still finishing it. The light in the window comes on soon.

For MacBook · macOS 13 or later · free

What it does
Keeps your Mac awake with the lid shut. No external display, keyboard or charger required.
When it sleeps
Unplug the charger, run the battery low or let a timer end, and normal sleep comes back on its own.
Setup
No password, no account, no helper. Open it, flip the switch, close the lid.
Status
In the final stretch. The download appears on this page when it is ready.