I'm confused: is the .md file a GitHub artifact, or did you really add two changelog.d entries?

Thanks for catching that mistake of mine @geekosaur. I let the .md slip in. I rename locally to check the markdown preview. I've deleted that extra file now.

Can we use a .md extension for changelog.d entries?

changelog-d doesn't care; the only special name is config, where its own configuration is stored, and you can't use subdirectories. It might even be better to use the extension, since that way GitHub will also render it (although it will probably be confused by the YAML frontmatter).

Reverting to draft while I settle some Windows versus POSIX file path issues.