There are ways to enforce it. Yeah, you won't be able to make everyone follow the rule, but it's the same with any law and any public policy and they're still valuable. You don't make campaigns against DUI because you expect everyone to stop doing it, as that's a nirvana fallacy, you make them because you expect them to reduce DUI.

Which tells a lot about how good they are. Slop is slop because it's bad, but a high quality PR isn't

so the solution then is to just give up??

sorry but that's obviously nonsense, you can have unenforceable rules, god isn't going to smite you for doing so.

With systems starting to move to watermarking tech a lot of them will actually be detectable.

Either way that doesn't make it a bad idea or less useful.

I think that's a commendable effort. Usually I do it the same way. Just feels massively unfair to me towards human contributors. I've seen the AI pull requests and bugreports come in. And it's very time consuming to deal with them. They're long, convoluted, touch a lot of code... There's frequently a good amount of "hallucinations" in them, because they're sent in autonomously or by people who don't know what they're doing. There might be dozens of them in quick succession as with the larger projects. They eat up time and effort which is now missing to deal with human contributions or wishes. My own opinion is: Transparency would help a lot to prioritize stuff. I mean AI isn't sentient, and as long as that holds true, I'd rather treat people with respect and the amount of attention they deserve... (In contrast to a level playing field between human and machine... Because the machines will easily beat us by sheer volume.)

"Just" like with GDPR, "just" follow the rules for personal data management. In reality, compliance stuff like that is expensive to implement.

So if you are going to require it, don't pretend it is without cost. Which is exactly what you seem to be doing.