Consider using w3c/webref?

W3C now maintains an automatically updated extract of the CSS fragments (along with other spec artefacts) in https://github.com/w3c/webref/ (extracted via https://github.com/w3c/reffy/) - this could serve as a replacement for this project? In particular, it extracts the said fragments from more than the csswg-drafts repo since a few CSS-defining specs are hosted in other repos.

We're looking at guaranteeing in the published fragments parseability by the csstree's css grammar parser - see https://github.com/w3c/reffy/issues/494 where directly related discussion is happening