There's a lot of "it kind of worked" in here.

If we actually want stuff that works, we need to come up with a new process. If we get "almost" good code from a single invocation, you just going to get a lot of almost good code from a loop. What we likely need is a Cucumberesque format with example tables for requirements that we can distill an AI to use. It will build the tests and then build the code to to pass the tests.