It *should* be being kept in sync with the published versions, but Donald and I have just been working directly in the main PEP repo recently.

Hence my suggestion of moving it to GitHub - it's more likely to be kept up to date there, and, unlike the master PEP repo, I'm happy to host the working drafts and issue tracker for the metadata PEPs wherever folks find them most convenient to work with.

I'd suggest pypa/peps on github (i.e. a more general name than pypi-metadata-formats)
and ideally change the name of the pep src file after it has a pep number. (i.e. from versioning.rst to pep0440.rst)
also, maybe isolate the named drafts (with no number) in a "drafts" folder.