OpenSSH 9.0 released

I don't see how gpg-agent would see anything about NTRU, have you seen it as a problem? sntrup761x25519 should only be getting used for key exchange (KEX), versus gpg-agent which doesn't handle KEX, just public key auth signatures which keep using existing schemes.

gpg-agent might still need updating to handle rsa-sha2 signatures, but that's a different problem. https://adamheins.com/blog/ssh-agent-key-rsa