JavaScript

No, CI validates that the hooks or formatter ran, and fails if not. in theory it shouldn't ever fail but it's to catch the stuff that couldn't have passed the commit hook.

the hooks are easy to turn off and can be hard to get to reliably run (90% of the time they're fine, but all of the tools that run git commands sometimes do weird things), but they're a best effort kind of thing.

unit tests on precommit are a little annoying, especially when it takes that long. that's better suited to running in ci afterwards since there's no advantage to running before you commit. formatter takes like 200ms max for affected files? you won't notice, and it ends up as part of the one commit