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responsiveness-check

100 / 100 · Low risk

Fine to try.

By jezweb/claude-skills (GitHub) · coding · 1,107 stars · scanned at commit 1260fa7

Test website responsiveness across viewport widths using browser automation. Resizes a single session through breakpoints, screenshots each width, and detects layout transitions (column changes, nav switches, overflow). Produces comparison reports showing exactly where layouts break. Trigger with 'responsiveness check', 'check responsive', 'breakpoint test', 'viewport test', 'responsive sweep', 'check breakpoints', or 'test at mobile'.

Works with any agent that supports SKILL.md skills.

What this skill can do

We found nothing in the files we read that matches our rules. That does not prove the skill is safe: see the limits of static scanning.

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'responsiveness-check' ] || [ -L ~/.agents/skills/'responsiveness-check' ]; then echo 'A skill folder named responsiveness-check already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/jezweb/claude-skills' "$d" && git -C "$d" checkout --quiet '1260fa7439b36b18dbf16648ccc7fb44783f6c23' -- 'plugins/dev-tools/skills/responsiveness-check' && mkdir -p ~/.agents/skills && cp -R "$d"/'plugins/dev-tools/skills/responsiveness-check' ~/.agents/skills/'responsiveness-check' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'responsiveness-check' ~/.claude/skills/'responsiveness-check' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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