SSH config managed from 1Password - alternative to SSH Bookmarks

(Mods: feel free to remove this if it's not appropriate here)

I gave SSH Bookmarks a try but found it didn't quite cover my needs. No password/OTP auth, no way to use arbitrary SSH directives, no per-machine filtering, ... 
So I ended up building a small OSS tool called ssh-concierge that takes a similar approach but goes a bit further: it treats 1Password as the single source of truth for your entire SSH config, not just key-to-host mapping.

In case it's useful to anyone else: https://github.com/bedezign/ssh-concierge

Happy to answer questions!