responsive-audit

responsive-audit is a skill for Claude Code from soumyachk101/VibeLens. It costs 41 tokens per session (386 once invoked), scanned A, original, MIT.

A responsive-design audit tool that checks a local web page on mobile, tablet, and desktop screen sizes. It looks for layout failures such as overflow, incorrect navigation, and grids or images that do not reflow.

In plain words
What is it for?
Auditing and fixing breakpoints, mobile layouts, wrapping, navigation collapse, touch-target sizes, fixed widths, image layouts, and grid behaviour on a localhost page.
Why use it?
It finds problems that appear only at particular screen widths, helping ensure a page remains usable across devices.

Skill for Claude Code

Written for Claude Code: $ARGUMENTS substitution.

Part of the vibelens plugin — 12 skills, 4 agents, 1 hook shipped together

Good fit Auditing and fixing breakpoints, mobile layouts, wrapping, navigation collapse, touch-target sizes, fixed widths, image layouts, and grid behaviour on a localhost page.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/soumyachk101/vibelens/responsive-audit
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 soumyachk101/VibeLens --skill responsive-audit
Clone the repo
git clone --depth 1 https://github.com/soumyachk101/VibeLens

Made for: Claude Code.

Or install vibelens, the plugin that ships this one along with the rest of its 12 skills, 4 agents, 1 hook.

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/soumyachk101/vibelens/responsive-audit/github.svg)](https://agentmods.dev/skills/soumyachk101/vibelens/responsive-audit)
Your own site
<a href="https://agentmods.dev/skills/soumyachk101/vibelens/responsive-audit"><img src="https://agentmods.dev/badge/skills/soumyachk101/vibelens/responsive-audit/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.

agentmods 80×15 button for responsive-audit

Your own site · 80×15
<a href="https://agentmods.dev/skills/soumyachk101/vibelens/responsive-audit"><img src="https://agentmods.dev/badge/skills/soumyachk101/vibelens/responsive-audit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 386 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00041 $0.00386
Opus 5 $0.00020 $0.00193
Sonnet 5 $0.00008 $0.00077
Haiku 4.5 $0.00004 $0.00039

Measured 10d ago against content hash a8752628f1e6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, 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 10d 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.

plugin/skills/responsive-audit/SKILL.md · 34 lines

What it actually says

Responsive audit

Target: $ARGUMENTS (if empty, ask for the URL).

Steps

  1. Capture the same URL three times with inspect_localhost_ui: viewport: "mobile" (390×844), "tablet" (820×1180), "desktop" (1920×1080). Use fullPage: true so nothing below the fold is missed.
  2. For each capture, look for the failure modes that only appear at one width:
    • horizontal overflow / content escaping its container
    • text wrapping into one word per line, or not wrapping at all
    • nav or toolbar collapsing incorrectly, or not collapsing at all
    • tap targets under ~44px on mobile
    • images and grids that do not reflow
    • fixed pixel widths that exceed the viewport
  3. Cross-reference the simplifiedDOM from the mobile capture. Responsive bugs are almost always a missing or wrong breakpoint prefix (md:, lg:) or a hardcoded width. Quote the exact class list you are changing.
  4. Fix the narrowest breakpoint first, then re-capture that viewport to confirm. Only then move up — a mobile fix often resolves tablet too.
  5. Re-capture all three at the end and report the before/after per viewport.

Notes

  • Report only real breakage. Do not restyle a page that already works because you would have designed it differently.
  • Mobile and tablet render at deviceScaleFactor 2 with touch emulation, so hover-only interactions are a genuine finding on those viewports.
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. 10d ago First seen · 34 lines · 41 tokens per session scan A a8752628f1e6

Subscribe to this mod's changes

responsive-audit is a skill published in the GitHub repository soumyachk101/VibeLens (0 stars, last pushed 3d ago), licensed MIT. It adds 41 tokens to every session and 386 once invoked, about $0.0002 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.