Keybase updated their verification methods to include a command line method that relies on echo, gpg, perl, and curl. I really like this so-called "hardcore mode" because it uses only tools I already trust - I don't have to install anything from Keybase. The process involves running a script they provide, and you get to read through it and see exactly what it will do.
This actually happened a few months ago, but I just used it to verify my Keybase identity. I'm excited to see Keybase improve the web of trust.