sounds like you're doing all the actual work. why not just type the code as you figure out how to break down the problem? you're going to have to review the output anyway.

It's useful to have the small functions all written.

I program mostly in VBA these days (a little problematic as is a dead leanguage since 2006 and even then it was niche) and I have never recived a correct high level ""main"" sub but the AIs are pretty good at doing small subs I then organize.

And yes, telling me where I make errors, they are pretty good at that

At the end of the day I want reliability and there is no way I can't do what without full review.

The funny thing is that they try to use the """best practices""" of coding where you would reasonably want to NOT have them.