Summary
Resizes a browser window through 8 standard breakpoints (or every 160px in sweep mode) and screenshots each width to catch layout breaks. The real value is in transition detection: it tells you exactly where your navigation switches to hamburger, where columns reflow, where overflow starts. Checks the eight things that actually vary by viewport (overflow, text truncation, touch target size, CTA visibility) and skips general accessibility stuff that doesn't change with width. Works with playwright-cli, Playwright MCP, or Chrome MCP. Good for debugging that mysterious tablet-range jank or confirming your CSS breakpoints match actual layout shifts.
Install to Claude Code
npx -y skills add jezweb/claude-skills --skill responsiveness-check --agent claude-codeInstalls into .claude/skills of the current project.
belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
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Agent, run crypto. Access onchain data & trade routes via 1inch.
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Make coding agent sessions - Searchable, Shareable, Vendor-neutral & Scored.
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Integrate web data into your AI product. One API to scrape website & brand data.
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belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →Plug Mailtrap into your AI workflow and let it handle the email.
Connect Mailtrap MCP →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →Make coding agent sessions - Searchable, Shareable, Vendor-neutral & Scored.
Try For Free →Your agent targets a perfect 10 Code Health score. Deterministic. Every commit.
Try For Free →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →First SeenApr 16, 2026
