I personally have been finding good results "hiding the code" behind the harnesses. I do have to rely on verification and testing a lot, which I also get the AI

I personally have been finding good results "hiding the code" behind the harnesses. I do have to rely on verification and testing a lot, which I also get the AI to do, but for most of the cases it works out well enough. A good verification and testing setup with automated, strict reviewing goes a long way.