SPEC 4 — Nightly Wheels

Recommends projects test against nightly wheels of widely-used projects and how those projects should upload new nightly wheels and remove old nightly wheels:

For a longer discussion, please see: Interest in GitHub Action for scipy-wheels-nightly uploads and removals.

I think it would be nice to extend the scope to testing against a nightly build of CPython, at least on the Linux platform where it should be quite easy to fetch a pre-built binary of CPython.

This is something that is already done in numpy and scipy we would like to do in the scikit-learn project: