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moughamir
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responsiveness-check

Identify viewport widths where web page layouts break via automated resizing and screenshot comparisons.

Updated Mar 26, 2026
Search Tags:#browser automation#breakpoints#screenshot comparison#frontend QA#responsiveness#viewport testing#layout transition
One-click install
npx skills add https://github.com/moughamir/justwaitit-review --skill responsiveness-check-moughamir
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: responsiveness-check
Source: https://github.com/moughamir/justwaitit-review/tree/main/.agents/skills/responsiveness-check
Command: npx skills add https://github.com/moughamir/justwaitit-review --skill responsiveness-check-moughamir

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Responsiveness-check helps teams pinpoint the specific viewport widths where a website’s layout breaks, so you can fix CSS breakpoints with concrete evidence instead of guessing.

Core Features & Use Cases

  • Viewport sweep with screenshot evidence: Resizes a single browser session across breakpoints and captures above-fold (and optional below-fold) screenshots to compare results.
  • Layout-transition detection: Flags where navigation mode changes, column/grid counts change, sidebars appear/disappear, and cards reflow—then summarizes the exact width range.
  • Actionable failure reporting: Produces a structured report that maps issues to severity (Critical/High/Medium/Low) and the exact breakpoint widths affected.

Quick Start

Use the responsiveness-check skill to test a page’s layout across breakpoints by running a standard check on your target URL.

Frequently Asked Questions about responsiveness-check

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I find exact viewport widths where my website layout breaks?▼

Responsive layout transition detection works by sweeping a single browser session across predefined breakpoints, capturing above-fold screenshots, and flagging exact width ranges where navigation modes change, columns reflow, or sidebars disappear.

What's the best way to automate responsive QA for frontend layout transitions?▼

The best way to automate responsive QA for frontend layout transitions is to perform adjacent-width transition analysis with screenshot comparisons, generating a breakpoint-scoped report that maps layout failures to severity levels for deterministic debugging.

Can I test touch-target sizing and above-the-fold CTA visibility across breakpoints?▼

Yes, you can test touch-target sizing and above-the-fold CTA visibility by running a viewport sweep that captures screenshots across breakpoints and flags layout issues like media scaling problems, whitespace imbalance, and hidden CTAs in a structured report.

Do I need any browser automation dependencies to run a viewport testing sweep?▼

No browser automation dependencies are required to run a viewport testing sweep, as the responsiveness check operates within a single-session workflow using predefined breakpoints to perform automated resizing and screenshot comparisons.

Why does my responsive layout break between adjacent viewport widths without an obvious CSS breakpoint?▼

Your responsive layout may break between adjacent viewport widths due to column reflow, overflow, or media scaling issues that occur within transition ranges, requiring adjacent-width transition analysis to pinpoint the exact failure width.

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