Until 1-2 months ago, AI-written code was not allowed in llama.cpp. That changed, but it's still not allowed to have AI write your posts for you (issues, PR descriptions, etc.). In my experience, banning AI-written prose leads to much better contributions than on projects where it's allowed.

Of course, llama.cpp also gets lots of AI slop PRs from first-time contributors, but from what I've seen, maintainers simply ignore the bad submissions and prioritize the good contributions. I think that's probably one of the best ways to handle the slop overwhelm.