Produce a single mobile-app screen mockup, framed inside a real-feeling iPhone 15 Pro device.
mobile-app/
├── SKILL.md ← you're reading this
├── assets/
│ └── template.html ← seed: device frame + screen primitives (READ FIRST)
└── references/
├── layouts.md ← 6 screen archetypes (Feed / Detail / Onboarding / Profile / Checkout / Focus)
└── checklist.md ← P0/P1/P2 self-review (anti-fake-device)
assets/template.html end-to-end through the <style> block. The Dynamic Island, status bar SVG icons, home indicator, side rails, and tab bar are all already drawn in HTML/SVG — do not re-implement them inline on each screen.references/layouts.md so you know which 6 archetypes exist.:root variables in the seed.Copy assets/template.html to the project root as index.html. Replace the six :root variables with the active design system's tokens. Replace the page <title> and the caption above the device.
| Brief language | Use |
|---|---|
| feed, inbox, timeline, list, messages, notifications | A — Feed |
| article, post, item, recipe, song, product, song detail | B — Detail |
| sign-up, welcome, intro, walkthrough, tour | C — Onboarding |
| profile, account, user page, someone's bio | D — Profile |
| checkout, payment, order, form, settings step | E — Checkout |
| timer, map, dashboard widget, single big number | F — Focus / hero card |
A mobile screen does one job. If the brief seems to combine two, ship one screen and offer the other as a follow-up.
Copy the archetype block from layouts.md into <main class="content">, replacing the placeholder card. Fill bracketed text with real, specific copy from the brief. Drop the <nav class="tabbar"> block entirely for archetypes that don't show one (B, C, E).
Run through references/checklist.md. Pay extra attention to:
var(--font-display) (serif)<artifact identifier="mobile-slug" type="text/html" title="Mobile — Screen Name">
<!doctype html>
<html>...</html>
</artifact>
One sentence before describing what's there. Stop after </artifact>.
.num class.var(--font-display)..ph-img placeholders.