I think the website was just down when you tried. Skills should work with most models, they are just textual instructions.
replychatgpt is not openclaw.
replyCan I make other agents do it? Like a local one running on my machine.
replyYou can use openclaw with a local model.
replyYou can also in theory adapt their skills.md file for your setup (or ask AI to do it :-), but it is very openclaw-centric out of the box, yes.