so, managed to fold a few libraries that we publish to a local pypi repository into a pants repo. written a plugin to generate a version number when you run

pants package

What's the recommended way of shipping these to the repository? More pants extensions?

Can you clarify what you mean by "shipping these to the repository"? Publishing to the local pypi repository? There is no pants intrinsic support for publishing yet, but one could be written fairly straightforwardly