It would make sense for package loaders to have it as a first-class field, instead of intrinsic/extrinsic metadata

There's also the Co-authored-by field in commit messages https://docs.github.com/en/github/committing-changes-to-your-project/creating-a-commit-with-multiple-authors (but it's not first class, so should probably be left in the commit message and only shown on the UI, if tat all)