Before I left Google recently there was a document going around called go/stake-your-reputation, basically saying "I'm happy to receive your AI generated code but the condition is that I will judge your capabilities by it, exactly as if you handwrote it, and I'll lower my opinion of you if it's slop (with the implication that if you don't improve I'll stop accepting your contributions)"

I think the term "stake your reputation" is quite good for this situation. I.e. "hi new contributor, please acknowledge that you Stake Your Reputation before we move ahead with this code review".

(Doesn't help with legal aspects of course)