https://gitlab.com/philbooth/opair
It's a coding harness that eschews autonomy and instead works like a pair programming partner, with distinct "driver" and "navigator" modes. I've only spent 3 weekends on it so far, so it's a long way from finished. But I am at least using opair to work on opair now, which is nice.
I didn't really want to write a harness, I just got frustrated enough that nobody else was writing the harness I actually want to use. I'll probably be the only person that uses this, but I'm fine with that.