How do you make sure what gets built actually matches what you had in your head?

I've been building with no-code and AI tools for about a year now, and the thing I still haven't solved is this:

I have a very clear picture in my head of what I want. I describe it. Something gets built. It's close but the interaction or flow is just slightly off from what I imagined. Then I try to correct it and it shifts somewhere else.

With a traditional no-code builder you're making every decision in real time via drag and drop. With AI-generated builds there's this interpretation layer between your idea and the output that feels hard to control.

Curious how others deal with this. What's actually worked for you?