[42wim]

I've done the same with https://github.com/42wim/ssh-agentx/ Originally used to sign git commits with pgp in the sshagent, before ssh git commit signing was a thing.

Nowadays, I'm using it for signing code remotely on a server with a yubikey on the local laptop. (needs a patched relic - https://github.com/42wim/relic/tree/sshtoken)

Also works with windows as it uses https://github.com/buptczq/WinCryptSSHAgent that did the hard work to get it to talk with almost everything that exists in windows/wsl/putty etc.