I maintain a tool that runs coding agents, so I’m closer to an orchestrator than a harness. And I use it every day. I don't care much about the harness anymore because I get most things from that anyways!
I started my first harness around this time last year, spent the last 8 months using other harnesses, about to go back to rewrite mine so I can use it from the learnings. Then I have another harness I've been working on to wrap an NES emulator and play FF1.
We are so early into Ai, building a harness is a useful and educational experience.
Yes, it's my main harness and I use it with locally hosted models. It's the best harness for everything I do day to day. I use Claude Code (Opus) to update and improve it but I'm pretty close to RHI (recursive harness improvement) using my local models.
We are so early into Ai, building a harness is a useful and educational experience.