Maintainers can also use the exact same tools to help review and validate PRs

So the solution is for FOSS developers to pay large sums of money to AI companies, to solve the problem that the AI companies created, for profit? ... and you typed this out as though extorting charities were a solution, instead of a grotesquely immoral and unethical systemic failure?

I'm on your side, but don't you think 'grotesquely immoral and unethical' is a bit of an exhaggeration? It's just software.

Software has an ethical dimension, and it's ignorant or disingenuous to dismiss that.

AI reviewing AI. Or in other words, having non-deterministic systems review the creation of non-deterministic systems, hoping for a deterministic result. Good luck with that.