I would dearly like to have a way to unlock keys on the remote host with my local yubikey. I generate one key for every (user, host, remoteHost) tuple, so when

I would dearly like to have a way to unlock keys on the remote host with my local yubikey. I generate one key for every (user, host, remoteHost) tuple, so when I'm SSH-ed into a remote host, I can't use keys from that remote host to make further connections unless I use a passphrase.