AI has made a working demo radically cheaper. That is useful. It is also dangerous, because a plausible interface can now create the feeling of progress long before there is evidence of a product. At App Foundry, we treat generation as the easy part. The hard part is deciding what deserves to exist, turning evidence into a coherent product contract, and proving the live journey as a stranger would experience it. A demo is not a product A prototype can prove that familiar pa...