Hey Jake, Does displayplacer have an option to control brightness? I'm running a Hackintosh and ran into displayplacer as the Mac OS equivalent for xrandr but I can't seem to find any command to control brightness.
It still works great for me! And the only issue I’ve ran into can be entirely avoided just by using mode numbers directly instead of specifying each setting.
p.s. check out my pull request #62 for a bug fix! Funnily, it's for a scaling/HiDPI related issue. (though only matters when you don't use "mode: <>")