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web-perf

80 / 100 · Low risk

Fine to try.

By daishiman/harness-dev (GitHub) · design · 10 stars · scanned at commit 3e1b394

Chrome DevTools MCPを使ってWeb performanceを分析する。Core Web Vitals（LCP、INP、CLS）とFCP、TBT、Speed Indexを計測し、render-blocking resources、network dependency chains、layout shifts、cache、accessibilityの問題を特定する。表示速度の監査・計測・デバッグ・最適化、Lighthouse scoreの改善で使用する。既定スタックの必須スキルではないoptional群であり、要件で明示された場合、またはapp-orchestratorがv1前の計測として指示した場合のみロードする。事前学習の知識より最新の公式ドキュメントを優先する。

Works with any agent that supports SKILL.md skills.

What this skill can do

Install

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

if [ -e ~/.agents/skills/'web-perf' ] || [ -L ~/.agents/skills/'web-perf' ]; then echo 'A skill folder named web-perf already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/daishiman/harness-dev' "$d" && git -C "$d" checkout --quiet '3e1b394bd699e07d0b030acd44ee12f9143f89eb' -- '.agents/skills/web-perf' && mkdir -p ~/.agents/skills && cp -R "$d"/'.agents/skills/web-perf' ~/.agents/skills/'web-perf' && 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/'web-perf' ~/.claude/skills/'web-perf' (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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Score history

Also found in

Identical copies of this skill exist at:

• daishiman/harness-dev/.claude/skills/web-perf
• daishiman/harness-dev/aidd-agent-kit/skills/web-perf