At what point do prompt-to-app tools start struggling?
Around the point where a correct change depends on a decision made earlier that was never written down. In practice that is usually a few dozen files in, or the first time you modify something built more than a couple of weeks ago.
From Prompt-to-app tools: what they do, where they stop, published 9 August 2026. That article is where the reasoning behind this answer is set out, including what it does not cover.