"suspects".... that sounds error prone. And I read it like "we don't want AI generated stuff unless we can't tell the difference".
exactly, I for example don't care usually about false positives, in the very uncommon case it happens the pr creator can discuss and prove he actually understood the problem, the codebase, the project policy and how to explain his solution actually could work.
Any PR will get the same quality review. It's just that they now have a fast lane so they don't have to invest that much time to review a PR they won't fix properly and/or support.
How do they enforce that contributions aren’t copied and pasted from AGPLv3 or proprietary codebases? The honor system and intuition and occasionally flat out asking people.
Do you think sociopaths willing to lie about how they came up with a contribution are really that common?
It's their project, they can run it how they like. If they lose out on valid contributions that's their loss.
People are never entitled to their contributions getting accepted to someone else's code base.