# /viewport-proof

Command · Routers and working-style · UI031

Takes screenshots of the real page at phone, tablet and desktop sizes, checks the layout automatically, and gives one of three ship verdicts with a sheet of proof. Heavier than /impeccable audit, so save it for a final check on a big page.

## Prompt

```text
/viewport-proof the inbox page
```

**Skip it when:** Jobs where you already know which skill you want; call that skill directly.

**Best for:** Picking the right design skill for a job, a blunt critique when you want one, and proving a page works at every screen size.

**Notes:** /design picks a skill or recipe from the same catalog, recipes and situations as this guide. Type /design, or /design-kit:design if another skill uses the name.

## Skills

- [viewport-proof](https://atlasscope.dev/skills/viewport-proof): Use only when Austin explicitly invokes /viewport-proof or $viewport-proof.

Source: https://atlasscope.dev/prompts/viewport-proof-ui031