[virgilp]

No, OP literally claims "you can't spec out something you have no clue how to build"; I claim that on the contrary, you absolutely can - you don't need to know "how to build" but you need to clarify what you want to build. You can't ask AI to build something (and actually obtain a good "something") until you can say exactly what the said "something" is.

You iterate, yes - sometimes because the AI gets it wrong; and sometimes because you got it wrong (or didn't say exactly what you wanted, and AI assumed you wanted something else). But the less specific and clear you are in your requirements, the less likely it is you'll actually get what you want. With you not being specific in the requirements, it only really works if you want something that lots of people are building/have built before, because that will allow the AI to make correct assumptions about what to build.