I think that you should really try to get whatever agent you can to work on that kind of thing for you - guide it with the creation of testing frameworks and code coverage, focus more on the test cases with your human intellect, and let it work to pass them.
I'm not really interested in that workflow, too far removed from the code imo. I only really do that for certain tasks with a bunch of boilerplate, luckily I simply don't use languages or frameworks that require very much BS anymore.