web-performance-audit

Audits web performance using Core Web Vitals and Lighthouse metrics.

Updated Feb 18, 2026
One-click install
npx skills add https://github.com/Greenmamba29/skillsdotmd_web --skill web-performance-audit-greenmamba29
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: web-performance-audit
Source: https://github.com/Greenmamba29/skillsdotmd_web/tree/main/.agents/skills/web-performance-audit
Command: npx skills add https://github.com/Greenmamba29/skillsdotmd_web --skill web-performance-audit-greenmamba29

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill addresses slow website loading times and poor user experience by identifying and diagnosing performance bottlenecks.

Core Features & Use Cases

  • Core Web Vitals Analysis: Measures LCP, INP, and CLS against target metrics.
  • Lighthouse Auditing: Assesses overall performance, accessibility, SEO, and best practices.
  • Resource Optimization: Identifies issues with render-blocking scripts, large bundles, and unoptimized images.
  • Prioritized Recommendations: Provides actionable steps with estimated impact for performance improvements.
  • Use Case: A marketing team wants to improve their landing page conversion rates. This Skill can pinpoint why the page is slow to load, suggest specific image optimizations, and recommend code splitting for JavaScript, leading to a faster, more engaging user experience.

Quick Start

Run a web performance audit for the provided URL, optimizing for mobile devices on a 4G network.

Frequently Asked Questions about web-performance-audit

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I audit my website's Core Web Vitals and Lighthouse metrics?

To audit Core Web Vitals and Lighthouse metrics, the process analyzes your web application's LCP, INP, CLS, and TTFB against target metrics. It identifies performance bottlenecks and provides prioritized recommendations with estimated impact to improve loading speed.

What is causing my slow web page loading and how do I fix render-blocking scripts?

Slow web page loading is diagnosed by identifying render-blocking scripts, large bundles, and unoptimized images. You fix these bottlenecks by following the generated prioritized optimization recommendations with their estimated performance impact.

Can I test web performance for mobile devices on a 4G network?

Yes, you can test web performance for mobile devices on a 4G network. The audit supports configurable device types and network profiles, allowing you to evaluate Core Web Vitals and Lighthouse metrics under specific mobile conditions.

How do I set and evaluate performance budgets for my web application?

You can evaluate web application performance budgets by configuring target thresholds within the audit. The system measures resource metrics against these limits to identify over-budget areas and provide prioritized optimization recommendations.

Does the Lighthouse audit analyze accessibility and SEO alongside performance?

Yes, the Lighthouse audit analyzes accessibility and SEO alongside performance. It assesses overall best practices while specifically measuring Core Web Vitals like LCP, INP, and CLS to deliver comprehensive web optimization recommendations.

Why does my CLS score fail and how can I improve visual stability?

Your CLS score fails due to layout shifts identified during the Core Web Vitals analysis. You can improve visual stability by resolving the diagnosed bottlenecks and applying the provided prioritized optimization recommendations with estimated impact.