The post demonstrates how to build a very simplistic ssh client using the Golang standard library and the golang.org/x/crypto extended packages. After that, it demonstrates how to remove the IP-based underlay connection with an OpenZiti net.Conn to create a zero trust ssh client - zssh.
The full zssh project is availalbe on GitHub at https://github.com/openziti-test-kitchen/zssh (I work on the OpenZiti project and support zssh among other things)