This is great! I want sigstore-based or at least sigstore-style "keyless" short lived signatures to become more and more popular, so that support gets better everywhere. In particular, if having secure OIDC handling in a CI/CD pipeline becomes something that keeps people on GHA or GitLab then I'd hope third-party hosted CI/CD services begin to take that gap seriously and work on meeting those requirements.
I'm bought in on keyless signing, and I want there to be many more providers, so I like to see more adoption which builds more momentum.
Tangled and Codeberg both seem to support issuing JWTs during actions runs.
Codeberg: https://codeberg.org/mfenniak/oidc-jwt Tangled: https://tangled.org/docs/spindles/workflows/#audience
I think OIDC tokens from workflows is basically table stakes at this point, since the alternative is a static secret, which is basically guaranteed to leak eventually.
All that's left is for PyPI to accept these tokens in their set of trusted publishers.