> this includes the small things, such as responding to the Brightness function key About that, I have had some luck with https://github.com/kfix/ddcctl https:

> this includes the small things, such as responding to the Brightness function key About that, I have had some luck with https://github.com/kfix/ddcctl https://github.com/kfix/ddcctl to adjust an external monitor brightness and 'brew brightness' to read the current brightness of my MBP. I set that up in a cron job and that works well enough (although with a delay) with the brightness button of the MBP. The delay is less important to me as I use it essentially to sync the monitor brightness to the MBP autobrigthness.