Step 1 — Freeze a representative frame

Export the home screen + one detail view. Include real copy and final hierarchy—placeholders cause ambiguous spacing decisions downstream.

Step 2 — Pair the image with intent

Add a short paragraph describing navigation (tabs vs stack), primary user action, and brand tone (minimal vs dense). This is the difference between a pretty static screen and an app a tester can actually use.

Step 3 — Iterate like a design review

Treat the AI like a junior engineer: request larger tap targets, adjust corner radii, rename routes, or add empty states. Each pass should be one decision to keep diffs reviewable—same advice as our MVP builder guide.