How do I install the Web Perf Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/web-perf/SKILL.md and restart Claude Code. Both flows are detailed at https://claudskills.com/install/.

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

ClaudSkills / Product / accessibility

Web Perf

Category: Product · Sub-category: accessibility · Last updated: 2026-05-21

type:audit

Analyzes web performance using Chrome DevTools MCP. Measures Core Web Vitals (FCP, LCP, TBT, CLS, Speed Index), identifies render-blocking resources, network dependency chains, layout shifts, caching issues, and accessibility gaps. Use when asked to audit, profile, debug, or optimize page load performance, Lighthouse scores, or site speed. Biases towards retrieval from current documentation over pre-trained knowledge.

From the source SKILL.md

Your knowledge of web performance metrics, thresholds, and tooling APIs may be outdated. Prefer retrieval over pre-training when citing specific numbers or recommendations.

What this skill does

Web Perf is a community-contributed Claude Code skill in the accessibility sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/web-perf/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when asked to audit, profile, debug, or optimize page load performance, Lighthouse scores, or site speed. Biases towards retrieval from current documentation over pre-trained knowledge.

Who uses this skill

The Web Perf Claude Code skill is built for product managers, product designers, and cross-functional teams planning, shipping, and measuring product features. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 69,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/web-perf
curl -L https://claudskills.com/skills/web-perf/SKILL.md \
  -o ~/.claude/skills/web-perf/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/web-perf/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/web-perf/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\web-perf\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Attribution & license

Source: https://github.com/onfire7777/universal-ai-skills-library/blob/HEAD/skills/web-perf/SKILL.md
License: MIT
Author: onfire7777

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Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills. · What's New · Install guide · About · llms.txt

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Web Perf

From the source SKILL.md

What this skill does

Who uses this skill

How to install

Manual install (2 steps)

One-click install via the desktop app

Attribution & license

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