I think domain specific harnesses are already surpassing generic harnesses. I also think software development is its own domain.

My harness is a Claude Code plugin with its own brainstorming, adr, and planning skills with associated review and interview skills. Behavioral testing related to acceptance criteria is built in. Everything in my harness is gated to prevent ratholes.

I recently inflated a docker container to execute a set of work with Claude in unsafe mode and immediately saw problems with everything it was doing…and then I realized I had not installed my harness.

Running Claude without an engineering harness is like driving a car without brakes or a steering wheel.