Is this meant to be a subset of --help? It seems weird to skip --zjit-stats, for example.

All options shown in --help are supposed to be user-facing features, so I would show the same list of options in the doc and help.

Also, given that this will be another place that has something like --help, it'd be nice to keep its maintenance cost low by allowing to basically copy-paste one to the other.

I copied what seemed like relevant bits of YJIT's CLI. I can just reroute people to --help, too

(see YJIT CLI docs)

My experience from the YJIT doc maintenance is why I made the above comment. I would like the YJIT CLI doc to be fixed in the same way we fix it here.

I'm open to just rerouting people to --help to avoid the need of copy-pasting one to the other. But it seems useful for users to be able to see help while they're on the website without the need of running a ruby command. Maybe we could copy-paste the ZJIT section from the --help output if we want to just minimize the maintenance cost?