Pre-PEP: Requires-Implementation - declaring Python implementation compatibility in Core Metadata

Hi all, I’ve been working on CPython tooling and Python documentation translation and want to raise a gap I keep running into. I’d like to know whether the packaging community sees it the same way, and whether Core Metadata is the right place to address it. The problem Python packaging has standardised mechanisms for all of the following: Implementation identity at runtime - sys.implementation.name (PEP 421) Implementation-compatible wheel selection - implementation tags in wheel filenam...