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Ahmm... With Skyfield azimuth is always azimuth. I just recently wrote an app which does alt/az calcs and tested with different locations from Southern and Northern hemisphere and it gives the correct numbers (verified with SkySafari/Stellarium). Yet we have real azimuth for planets between ~0-90 and ~270-360 (due North), while up North they've got ~90-270 (due South). So it's not from 0 till 180. It's the whole 360. Statement "Azimuth angle is measured from 0o to 180o either westwards or eastwards from either north or south." is not entirely correct. And North is true North. You still need to apply a correction for magnetic north later as it's different in different parts of the world if you want a precise location.
The Skyfield is maintained and developed. The developer just fixed some issues with the code caused by new JPL ephemerides I've found recently.
I'm using it with the latest Python 3.9 on my macOS and Windows 10. No issues at all.
Regards,
Ilya
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