A browser-based check for responsive web layouts, meaning pages that adapt to different screen sizes. It checks common phone, tablet, and desktop viewports for overflow, unreadable text, broken navigation, overlapping elements, and unusable forms.

Use it to test a web page at several viewport sizes, including phone and tablet dimensions, and inspect navigation, cards, dialogs, forms, touch targets, spacing, and typography.

It helps find layout problems that appear on small screens but are easy to miss on a desktop display. It also provides a consistent checklist for mobile-width testing.

qa-mobile — Skill for Claude Code by parisgroup-ai

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add parisgroup-ai/imersao-ia-setup --skill qa-mobile

Clone the repo

git clone --depth 1 https://github.com/parisgroup-ai/imersao-ia-setup

Made for: Claude Code.

Or install imersao, the plugin that ships this one along with the rest of its 51 skills, 7 commands.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/parisgroup-ai/imersao-ia-setup/qa-mobile/github.svg)](https://agentmods.dev/skills/parisgroup-ai/imersao-ia-setup/qa-mobile)

Your own site

<a href="https://agentmods.dev/skills/parisgroup-ai/imersao-ia-setup/qa-mobile"><img src="https://agentmods.dev/badge/skills/parisgroup-ai/imersao-ia-setup/qa-mobile/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/parisgroup-ai/imersao-ia-setup/qa-mobile"><img src="https://agentmods.dev/badge/skills/parisgroup-ai/imersao-ia-setup/qa-mobile.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 67 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,488 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00067	$0.01488
Opus 5	$0.00034	$0.00744
Sonnet 5	$0.00013	$0.00298
Haiku 4.5	$0.00007	$0.00149

Measured 11d ago against content hash f871946b5c0f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

qa-mobile scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/imersao/skills/qa-mobile/SKILL.md · 161 lines

How it starts

The opening of the file, as written. The whole thing — 161 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Mobile QA Skill

Systematic responsive QA using browser automation.

Viewports

Device	Width	Height
iPhone SE	375	667
iPhone 14 Pro Max	430	932
iPad Mini	768	1024
iPad Pro	1024	1366
Desktop	1440	900

QA Checklist

For each viewport, check:

Layout

No horizontal overflow (no horizontal scrollbar)
Content doesn't overflow containers
Text is readable (min 12px on mobile)
Touch targets are at least 44x44px
No overlapping elements

Navigation

Mobile nav is functional (hamburger/tabs)
Links are tappable
Sticky headers don't cover content

Components

Cards display correctly
Modals/dialogs fit viewport
Forms are usable (inputs not too small)
Carousels/sliders work with touch

Design System

Semantic tokens used (no hardcoded colors)
Spacing is proportional to viewport
Typography scales properly (sm/md/lg breakpoints)

Browser Tool Selection

Use Playwright MCP as the primary browser tool. Fall back to claude-in-chrome only if Playwright MCP is unavailable.

For visual tests (screenshots, visual comparison, pixel-level checks), always use Playwright MCP — it provides headless screenshots with consistent rendering, which is essential for reliable visual validation.

Chromium for Testing (REQUIRED)

Before starting browser interactions, ensure the new Chromium headless mode is active. This uses the real Chrome browser (not the legacy headless shell), providing more authentic rendering and behavior that matches what real users see.

Install Chromium for Testing (if not already installed):
```
mcp__plugin_playwright_playwright__browser_install
```
This ensures the Chromium for Testing binary is available.
The Playwright MCP uses channel: 'chromium' by default when configured — this opts into the new headless mode which is the real Chrome browser running headless, more reliable for visual QA than the legacy headless shell.

Read the full file on GitHub · 161 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

11d ago First seen · 161 lines · 67 tokens per session scan A f871946b5c0f

Subscribe to this mod's changes

qa-mobile is a skill published in the GitHub repository parisgroup-ai/imersao-ia-setup (1 stars, last pushed 29d ago), licensed MIT. It adds 67 tokens to every session and 1,488 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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