Throw tmux in and this is my exact setup as well. I'm looking into finding ways to orchestrate entire workflows across multiple agents in a harness-agnostic way (locally at first).
Wannabe powerlifter here of about 20 years as well. This sounds like an awesome project! Is bar-path the main metric for safety and "better" lifting? A project I had in mind, once upon a time, was an automatic "Form Check Friday" for myself using a Pi + Webcam.