Hi,
I made a new subkey but can't export the secret key in SSH format:
$ gpg --export-secret-ssh-key \&9AE6168B402A720D0AD27C4FB09A244CFEE3476E gpg: export as ssh key failed: Invalid public key algorithm
This functionality is needed to support the Monkeysphere. Converting SSH-format ed25519 keys to Tor onion service key files is mostly straightforward but obviously OpenPGP key files are more complex. I tried seeing if I could inform gpgsm of the key pair and use its options to export raw public keys, but it choked on the key thinking it was RSA and that's a separate issue.