Alex Zhang describes Prime Agent as a harness built on Pi and says he uses Pi as his reference for other harnesses, which he considers basically Pi-like.

“a harness on top of pi like pi mono which is pi mono for context is like the”

“yeah like harness i use pi as the reference for everything because i think all other harnesses are basically just pi um but it is pi except we explicitly restrict ipython to be the only tool that's available to it every other tool gets loaded in as like a python module um or like a like a bash kind of script that it can”