Pi is a great example of this. I've used it as the basis for a fleet of agents I'm running on my server, but rather than using the Pi TUI I run it in headless-mode and have extended it to use XMPP as its communication layer so I can use any device with the same sessions, and so agents can talk to each other.

The Pi harness is built to be extended like this, and it's a joy to work with.