We've had low code tools before that caused similar issues. Nothing like AI though... I do agree with the other commenter here that a reputation system is probably the path forwar. Something like a minimum number of PRs accepted on gold standard projects or something? People will game that too though and post slop regardless... It's a fine line between making proof so onerous that nobody contributes, or so easy to get people just spin up new accounts to contribute and don't care if they get banned from projects.

Realistically AI is still heavily subsidized by circular financing and IOUs. The real cost of AI is still orders of magnitude more expensive (if you want to truly break even) so this might end up being a self solving problem once the AI bubble pops and it now costs $15 to shit out a slop PR