responsive-audit

responsive-audit is a skill for Claude Code, Codex from Akakaui/visual-browser-agent. It costs 26 tokens per session (782 once invoked), scanned A, original, MIT.

A method for checking whether a website remains usable at different screen sizes. Responsive design means a page’s layout and content adjust to phones, tablets, and desktop screens.

In plain words
What is it for?
Use it to audit navigation, content reflow, image scaling, forms, touch targets, typography, grids, scrolling, font loading, and layout stability across desktop, tablet, and mobile views.
Why use it?
It exposes problems such as horizontal scrolling, unreadable text, overlapping elements, broken navigation, and touch controls that are too small. Testing several standard viewports makes the results consistent.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/akakaui/visual-browser-agent/responsive-audit
Any agent
npx skills add Akakaui/visual-browser-agent --skill responsive-audit
Clone the repo
git clone --depth 1 https://github.com/Akakaui/visual-browser-agent

Made for: Claude Code, Codex.

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.

agentmods badge for responsive-audit

README.md
[![agentmods](https://agentmods.dev/badge/skills/akakaui/visual-browser-agent/responsive-audit.svg)](https://agentmods.dev/skills/akakaui/visual-browser-agent/responsive-audit)
Your own site
<a href="https://agentmods.dev/skills/akakaui/visual-browser-agent/responsive-audit"><img src="https://agentmods.dev/badge/skills/akakaui/visual-browser-agent/responsive-audit.svg" alt="Measured on agentmods" height="20"></a>
Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 782 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00026 $0.00782
Opus 5 $0.00013 $0.00391
Sonnet 5 $0.00005 $0.00156
Haiku 4.5 $0.00003 $0.00078

Measured 3d ago against content hash 754459a50610, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

responsive-audit 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 3d 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.

skills/responsive-audit/SKILL.md · 115 lines

How it starts

The opening of the file, as written. The whole thing — 115 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Responsive Audit Skill

When to Use

Use this skill to verify responsive design:

  • Layout at different breakpoints
  • Navigation adaptation (hamburger menu, etc.)
  • Content reflow and readability
  • Touch target sizes (min 44x44px)
  • Image scaling and art direction
  • Font scaling and line length
  • Horizontal scrolling issues

Instructions

Standard Viewports

Test at minimum:

  • Desktop: 1280x720, 1920x1080
  • Tablet: 768x1024 (portrait), 1024x768 (landscape)
  • Mobile: 375x667 (iPhone), 390x844 (modern), 412x915 (large)

Audit Checklist Per Viewport

Navigation
  • Menu accessible (hamburger on mobile)
  • Touch targets ≥ 44x44px
  • Logo/brand visible
  • Search accessible
Content
  • No horizontal scroll
  • Text readable (min 16px, line length 45-75ch)
  • Images scale properly
  • Tables handle overflow (scroll/cards)
  • Forms usable (inputs sized, labels visible)
Layout
  • Grid/flex reflows correctly
  • No overlapping elements
  • Whitespace appropriate
  • Footer accessible
Performance
  • Images appropriately sized (srcset)
  • No layout shift (CLS)
  • Fonts loaded (FOIT/FOUT handled)

Evidence Capture

For each viewport:

  1. navigate(url, waitUntil: "networkidle")
  2. capture_screenshot(action: "responsive-{viewport}", requirement: "{viewport} layout")
  3. inspect_page(includeA11y: true) - check touch targets, labels

Issue Documentation

{
  "viewport": "mobile-375",
  "issue": "Navigation menu overlaps content",
  "severity": "high",
  "evidence": "frames/responsive-mobile-375.png",
  "wcag": "1.4.10 Reflow"
}

Output

# Responsive Audit: {url}

## Viewports Tested
- Desktop (1280x720) ✓
- Tablet (768x1024) ✓
- Mobile (375x667) ⚠ Issues found

## Issues
| Viewport | Component | Issue | Severity | Evidence |
|----------|-----------|-------|----------|----------|
| Mobile | Nav | Hamburger menu doesn't close on link click | High | event-012 |
| Tablet | Hero | Text too small (14px) | Medium | event-015 |

## Pass Rate: 85%

Read the full file on GitHub · 115 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.

  1. 3d ago First seen · 115 lines · 26 tokens per session scan A 754459a50610

Subscribe to this mod's changes

responsive-audit is a skill published in the GitHub repository Akakaui/visual-browser-agent (0 stars, last pushed 10d ago), licensed MIT. It adds 26 tokens to every session and 782 once invoked, about $0.0001 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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