I don't think I've ever worked in a company that would fire someone for something like that. Maybe you'd get a scheduled conversation to talk about it, to try to resolve whatever is going on (in this case verbose AI slop PRs), since obviously something is going wrong when people start engaging in malicious compliance.

But then I also never worked in a country where people can be fired for whatever reason, it's always been a legal requirement (in the countries I've lived at least) that the firing needs to be properly justified and explained, and firing someone like that wouldn't be justified.