I fear the approach that maximises productivity is a literal one-shot approach: Give the LLM one or two shots at generating a somewhat passable first attempt (including all or at least most of the boilerplate) and then strictly fix up stuff yourself. I recently spend a day attempting to build a relatively simple GUI for a project which _maybe_ contains a couple of days of programming work. It got the gist of the GUI basically in one. And the next two or three prompts then added the buttons I wanted. Most of it even worked

But after that we ran into a kind of loop, where you put my feelings into much better words than I could. If I had stopped after iteration 3, I probably would have finished what I wanted to do in half a day