If it works, it's not wrong. Wasting any time or energy on determining whether or not the source is AI is stupid. If all the requirements are met, in terms of style guide, documentation, functionality, thorough testing and correctness, then it's good. Doesn't matter if AI wrote it, or if it's artisanal hand-crafted bytecode lovingly prepared by a native of Computronistan.

The trick is to define what works - set the bar high enough that you're driving away raw human contributors, annoying high value humans, or arbitrarily barring AI users out of dogma or politics or whatever. A hierarchy of maintainers, with people willing to volunteer to sift through submissions, each handing up a much reduced list to the next level, is probably where big projects will have to go.

At some point it won't matter; while it does, look for enthusiastic volunteers and make good, sensible, functional rules that get the best results.