Clean-room design is extremely specific. Anyone who has so much as glanced at Windows source code[1] (or even ReactOS code![2]) is permanently banned from contributing to WINE.

This is 100% unambiguously not clean-room unless they can somehow prove it was never trained on any C compiler code (which they can't, because it most certainly was).

[1] https://gitlab.winehq.org/wine/wine/-/wikis/Developer-FAQ#wh...

[2] https://gitlab.winehq.org/wine/wine/-/wikis/Clean-Room-Guide...