So you decide to mess with Home Assistant and find out that this means you've gotta program your own dimmer switches.
(at this point, you've already had your Naked Lunch moment and you know the sensible thing is to run screaming but you're ploughing on regardless knowing whatever happens next, it's on you, bought and paid for)
So you write your dimmerSwitch.yaml in yaml which simultaneously stands for "Yet Another Markup Language" and "YAML Ain't a Markup Language" and is a cursed way to try and program, and you've filled your little yammal up with comments so when it breaks you can remind yourself what any of this crap means:
# dan it's 2am and this is the bit that registers the knob turning anticlockwise
# dear future dan, hi from tired past dan, this next part is a sin and I'm sorry
And you can do all this in an editor in the browser that's surprisingly capable, and hit Save.
You'll find out the next time you open the file that your comments were automatically and silently deleted, and you'll go "Huh, yeah, that tracks"