> As far as the TurboQuant thing goes, it seems that attn-rot has recently been merged in, which is a lightweight variety of it and written by the original llama.cpp author, so not an outside pull req.

Yes, read the first sentence of the PR for it. The project is a constant target for vibecoded PRs and they're trying to stay in front of it:

> In anticipation of the incoming flood of vibe generated PRs implementing TurboQuant, I'm raising the baseline a bit