[pnutjam]

True, but having supported an sftp server for other b2b clients to upload data, ssh keys are black magic to too many people. I can't count the hours I've spent trying to explain them, how to generate them and why you should never "show anyone your privates", just your publics.

[jooize]

It would be more obvious if the private key files were named “id_ed25519.private”.

Why not make it “identity.ed25519.private.sshkey” and default to “20200916{,T224400Z}.ed25519.{private,public}.sshkey”?

[pnutjam]

Put in a feature request to the openssh guys. Theo can probably tell you why it's not a good idea, or why it is good idea.