web-performance-audit

Web performance audits with Core Web Vitals, bottleneck identification, optimization recommendations. Use for page load times, performance reviews, UX optimization, or encountering LCP, FID, CLS issues, resource blocking, render delays.

1.20x

Quality

75%

Does it follow best practices?

Impact

96%

1.20x

Average score across 3 eval scenarios

Securityby

Advisory

Suggest reviewing before use

Optimize this skill with Tessl

npx tessl skill review --optimize ./plugins/web-performance-audit/skills/web-performance-audit/SKILL.md

Evaluation results

100%

22%

Add Real User Monitoring to E-Commerce Checkout Flow

Core Web Vitals measurement

Criteria

Without context

With context

web-vitals library

100%

getCLS import

80%

100%

getFID import

100%

getLCP import

100%

getTTFB import

100%

LCP threshold Good

100%

CLS threshold Good

100%

INP threshold

100%

FID threshold Good

100%

Callback signature

100%

Three-tier classification

100%

No INP omission

50%

100%

98%

Automate Performance Audits for a Marketing Site

Lighthouse automation script

Criteria

Without context

With context

lighthouse package

100%

chrome-launcher package

100%

headless flag

100%

performance-only category

100%

chrome port wiring

100%

chrome.kill() called

100%

80%

returns lhr

50%

100%

accepts URL parameter

100%

async/await pattern

100%

package.json dependencies

100%

92%

25%

Performance Audit and Optimization Roadmap for a News Portal

Audit report and optimization plan

Criteria

Without context

With context

Budget timings array

50%

100%

Budget resourceSizes array

50%

100%

FCP budget value

LCP budget value

100%

Script size budget

37%

100%

Image size budget

37%

100%

Quick wins tier

100%

Medium effort tier

100%

Long-term tier

100%

Baseline measurement step

100%

Mobile and desktop Lighthouse

50%

100%

Monitoring alerts

100%

3G testing

100%

Three optimization tiers

100%

Repository: secondsky/claude-skills
Commit: 88da5ff

Evaluated: about 2 months ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

Add Real User Monitoring to E-Commerce Checkout Flow Automate Performance Audits for a Marketing Site Performance Audit and Optimization Roadmap for a News Portal

Is this your skill?

If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.