mccSo I do not know much about codes of conduct. I know they're old hat but I don't have personal experience in interacting with them. Are there any "off-the-shelf" CoCs other than the Contributor Covenant I should be aware of? It seems like it's better to use one that's met with success elsewhere than to try to write your own but the Contributor Covenant is the only one I've heard of.
Merlijn Sebrechts(from an open source perspective)
Ubuntu CoC used to be quite popular. It was one of the first major projects adopting a CoC. But it really shows its age, with the large focus on "meritocracy". Nevertheless, many others, such as the Django one, have taken inspiration from it.
Another one is the Citizen CoC: https://web.archive.org/web/20200330154000/http://citizencodeofconduct.org/
Imo, enforcement is much more important than what's actually in it. For example, Ubuntu Discourse is a great place thanks to the mods, not the CoC itself.