I would love to hear what other projects have in place to prohibit AI contributions. If you don't have anything yet, feel free to use my text as a starting point. Thanks to @Torsten for pointing out the missing license.

GNOME Discourse

Loupe no longer allows generative AI contributions

I just merged an addition to Loupe’s contribution guidelines that bans the use of AI generated content in contributions. For now, I came up with...