I am sure this is referring to the userspace contribs, not the kernel itself, since the userspace stuff is really what makes the distro a distro (unless it's running custom kernels, which it would have to use a backport from pre-AI code, or something)...

That said if they extended to kernel-space, it seems like NetBSD would be the other *nix like alternative (Google's AI summary says they're the only BSD to take a strict no-ai stance).

Or Gnu HURD.