The brief becomes the first interface
Starting from a sentence feels simple, but ambiguity does not disappear—it moves into the agent’s assumptions. The best briefs identify who the product serves, what the first successful action is, and which constraints cannot be traded away.
A first render is not a finished build
Scaffolding proves that the environment works. It does not prove the information hierarchy, responsive behavior, accessibility, or real data states. Product quality arrives in the passes after generation, when the team tests the details the brief could not fully express.
A useful handoff is inspectable
The finished run should leave a clear diff, a working preview, tests proportional to the change, and a concise note about unresolved choices. That turns a fast generation loop into software another person can safely continue.