> I was prototyping something with pi under the hood for a personal project, going to switch off it now.

For what it's worth, it's pretty straightforward to recreate it I found, at least it's base idea. Readline w/ nice output is a bit of a pain, but still, doable, and if you don't care about that part of it, then the overall agent loop that you'd build on top of? You could build it, I promise.