Flag is a very small Python 3.x module managed by launchd, tested on (and designed for) macOS Big Sur.
Flag is intended to help you control a single USB connected Luxafor Flag device from the Do Not Disturb switch you can find both in the Control Center and, when enabled from the System Preferences, in the Menu Bar:
For further efficiency, you may want to create a keyboard shorcut; like this one:
Flag requires the HID API to talk with your Luxafor device, something you can easily achieve with just pip:
$ sudo -H pip3 install hidapi
To deploy the three components of this repository (the user agent, the Python script and the logout hook):
$ sudo -H sh ./install.sh
The installer automatically loads the LaunchAgent for you, so everything should be working by now.
Enjoy. :)