It would be nice to now if Cyberduck, one of the most popular SFTP/SSH clients, is supported, how to configure it and list this information in the 'Setting up Third Party Apps FAQ' page.
I solved the issue and created a pull request with a proposed solution, so I consider this issue closed. Further discussion can be done in the PR https://github.com/maxgoedjen/secretive/pull/243
It would be nice to now if Cyberduck, one of the most popular SFTP/SSH clients, is supported, how to configure it and list this information in the 'Setting up Third Party Apps FAQ' page.
I tried to follow the guide her https://trac.cyberduck.io/wiki/help/en/howto/sftp and the information in this ticket to configure Cyberduck with gpg-agent (YubiKey) https://trac.cyberduck.io/ticket/10454, but I could not understand what was missing.