At a certain point it becomes more work to prompt the LLM with each and every edge case than it is to just write the dang code. I work out what the edge cases

At a certain point it becomes more work to prompt the LLM with each and every edge case than it is to just write the dang code. I work out what the edge cases are by writing and rewriting the code. It's in the process of shaping it that I see where things might go wrong. If an LLM can't do that on its own it isn't of much value for anything complicated.