How do I install the Perf Auditor skill?

Run npx skillmds@latest add modbender/perf-auditor in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Perf Auditor safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. Capability flags: makes network calls. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Perf Auditor?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Perf Auditor free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Perf Auditor?

modbender (@modbender) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Perf Auditor by modbender — Agent Skill

Name: Perf Auditor
Rating: 4.2 (5 reviews)
Author: modbender

File contents

Performance Auditor

Your site scores 43 on Lighthouse and you don't know where to start. This tool runs a performance audit and gives you specific, prioritized fixes instead of vague suggestions. It tells you exactly what's slowing things down and how to fix it.

One command. Zero config. Just works.

Quick Start

npx ai-lighthouse https://mysite.com

What It Does

Runs a Lighthouse performance audit on any URL
Identifies the biggest performance bottlenecks with specific metrics
Generates AI powered fix suggestions with actual code changes
Prioritizes fixes by impact so you tackle the big wins first
Covers Core Web Vitals, render blocking resources, and image optimization

Usage Examples

# Audit a production URL
npx ai-lighthouse https://mysite.com

# Audit a local dev server
npx ai-lighthouse http://localhost:3000

# Audit a specific page
npx ai-lighthouse https://mysite.com/products

Best Practices

Test production, not dev - Dev builds are unoptimized. Always audit the production URL for real numbers.
Fix the top 3 issues first - Don't try to fix everything at once. The top 3 usually account for 80% of the problem.
Run before and after - Get a baseline, make changes, then re-audit to see the improvement
Check mobile and desktop separately - Mobile performance is usually worse and that's where most users are

When to Use This

Your Lighthouse score dropped and you need to figure out why
A client is complaining about slow page loads
You want to optimize before a product launch
You need to pass Core Web Vitals thresholds for SEO

Part of the LXGIC Dev Toolkit

This is one of 110+ free developer tools built by LXGIC Studios. No paywalls, no sign-ups, no API keys on free tiers. Just tools that work.

Find more:

GitHub: https://github.com/LXGIC-Studios
Twitter: https://x.com/lxgicstudios
Substack: https://lxgicstudios.substack.com
Website: https://lxgic.dev

Requirements

No install needed. Just run with npx. Node.js 18+ recommended.

npx ai-lighthouse --help

How It Works

The tool runs Lighthouse programmatically against your URL to collect performance metrics. It then analyzes the audit results and sends the bottleneck data to an AI model that generates specific, actionable fix suggestions. Each suggestion includes the expected impact and code changes.

License

MIT. Free forever. Use it however you want.

---name: perf-auditordescription: Run a Lighthouse performance audit with AI fix suggestions. Use when your site is slow and you need actionable fixes.--- # Performance Auditor Your site scores 43 on Lighthouse and you don't know where to start. This tool runs a performance audit and gives you specific, prioritized fixes instead of vague suggestions. It tells you exactly what's slowing things down and how to fix it. **One command. Zero config. Just works.** ## Quick Start ```bash npx ai-lighthouse https://mysite.com ``` ## What It Does - Runs a Lighthouse performance audit on any URL - Identifies the biggest performance bottlenecks with specific metrics - Generates AI powered fix suggestions with actual code changes - Prioritizes fixes by impact so you tackle the big wins first - Covers Core Web Vitals, render blocking resources, and image optimization ## Usage Examples ```bash # Audit a production URL npx ai-lighthouse https://mysite.com # Audit a local dev server npx ai-lighthouse http://localhost:3000 # Audit a specific page npx ai-lighthouse https://mysite.com/products ``` ## Best Practices - **Test production, not dev** - Dev builds are unoptimized. Always audit the production URL for real numbers. - **Fix the top 3 issues first** - Don't try to fix everything at once. The top 3 usually account for 80% of the problem. - **Run before and after** - Get a baseline, make changes, then re-audit to see the improvement - **Check mobile and desktop separately** - Mobile performance is usually worse and that's where most users are ## When to Use This - Your Lighthouse score dropped and you need to figure out why - A client is complaining about slow page loads - You want to optimize before a product launch - You need to pass Core Web Vitals thresholds for SEO ## Part of the LXGIC Dev Toolkit This is one of 110+ free developer tools built by LXGIC Studios. No paywalls, no sign-ups, no API keys on free tiers. Just tools that work. **Find more:** - GitHub: https://github.com/LXGIC-Studios - Twitter: https://x.com/lxgicstudios - Substack: https://lxgicstudios.substack.com - Website: https://lxgic.dev ## Requirements No install needed. Just run with npx. Node.js 18+ recommended. ```bash npx ai-lighthouse --help ``` ## How It Works The tool runs Lighthouse programmatically against your URL to collect performance metrics. It then analyzes the audit results and sends the bottleneck data to an AI model that generates specific, actionable fix suggestions. Each suggestion includes the expected impact and code changes. ## License MIT. Free forever. Use it however you want.

Frequently asked questions

Perf Auditor