They very specifically do not accept AI contributions because there is no way to tell if it's just regurgitating parts of the various Windows source code leaks from over the years ad-hoc, which would be a very costly mistake to make if Microsoft were feeling litigious.
Tech companies shouldn’t be able have it both ways and say that copyright doesn’t apply to LLM-generated code only when it benefits them.
That would be something Microsoft would have to prove in court and not that the AI came up with a similar approach on its own. ReactOS never got sued despite its similarity to Window's code.
Also not all Wine code is related to reverse engineering.
On the other hand, it'd be absolutely fascinating to see how that'd play out. The ramifications could be huge.
The remedy for unintentional infringement is generally to remove the infringing code and cease distribution. That used to be a serious issue when rewriting the offending code might take years. But these days? Rewriting any offending code is a matter of specifying the interfaces and setting Claude / Codex to work. Risk of incorporating derived code might go up with accepting LLM submissions, but cost of recovering from them seems to have dropped accordingly, at least on the technical side.