Ahh forgot to update the general CI, or should we remove the quaddtype from there, given that build_wheels.yml has those same checks in its CI with more strict and on all platforms

Would the new functionality only be accessed through the dot function or is there a way to call that automatically when using numpy dot, matmul, etc?

Unfortunately no, not easily. We'd need to add a new dtype hook to the DType API in NumPy. Worth doing though! See numpy/numpy#28516 which adds a hook for sorting.

Ahh forgot to update the general CI, or should we remove the quaddtype from there, given that build_wheels.yml has those same checks in its CI with more strict and on all platforms

@ngoldbaum thoughts on this?

It would be good to have a slot parallel to np.dot (like it also picks the operation based on input dimensions)

Actually, I think we should probably not do this, unless arr.dot() really can't call into one of the existing ufuncs. I.e. yes, I am all for new slots, but if ufuncs work, that is better (even a new ufunc is likely better)!
(It does behave slightly differently, but I suspect one can map it.)

And the first step, is to implement those ufuncs, I think.

As per @seberg 's suggestion, this now implements numpy.matmul ufunc.

Some extra stuff includes:

• Refactor of umath
• Added a release_tracker.md to track the progress (pinned all the available numpy ufuncs and what we support right now)

@ngoldbaum please take a look and let me know if anything needs a fix