From one of the creators of mise is this little utility that can help make a bunch of documentation and shell completions for most shells.
Weirdly enough, I was just looking at this earlier because I'm a heavy user of his mise and hk.
I started experimenting with mise just today seems very promising. Will look into hk as well currently I am using lefthook as git hook manager.
I highly recommend both. Mise in particular has become indispensable for me.
The spec looks like a more readable man page (compare to mandoc).
Nowadays, a lot of CLI libraries actually generate the help from the code of the cli (like picocli in Java or argparse in python, etc.).
Gonna be tricky to do SEO on this one. Google: “Usage”