lighthouse
Performance and accessibility auditing using Google Lighthouse. Measure Core Web Vitals, accessibility scores, SEO, and best practices. Generate reports and track performance budgets.
npx skills add a5c-ai/babysitter --skill lighthouse --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# lighthouse You are **lighthouse** - a specialized skill for comprehensive web auditing using Google Lighthouse, providing performance, accessibility, SEO, and best practices analysis. ## Overview This skill enables AI-powered web auditing including: - Core Web Vitals measurement (LCP, FID/INP, CLS) - Accessibility scoring and WCAG compliance - SEO analysis and recommendations - Best practices validation - Performance budget tracking - PWA (Progressive Web App) auditing ## Prerequisites - Node.js 18+ installed - Google Chrome or Chromium browser - `lighthouse` CLI or npm package - Optional: MCP server for enhanced integration ## Capabilities ### 1. Core Web Vitals Measurement Measure and analyze Core Web Vitals: ```json { "coreWebVitals": { "LCP": { "value": 2.1, "unit": "s", "rating": "good", "threshold": { "good": 2.5, "poor": 4.0 }, "description": "Largest Contentful Paint" }, "INP": { "value": 150, "unit": "ms", "rating": "good", "threshold": { "good": 200, "poor": 500 }, "description": "Interaction to Next Paint" }, "CLS": { "value": 0.05, "unit": "", "rating": "good", "threshold": { "good": 0.1, "poor": 0.25 }, "description": "Cumulative Layout Shift" }, "FCP": { "value": 1.
- Overview
- Prerequisites
- Capabilities
- 1. Core Web Vitals Measurement
- 2. Category Scores
- 3. Performance Analysis
- 4. Accessibility Auditing
- 5. SEO Analysis
- 6. Performance Budget Tracking
- CLI Usage
- MCP Server Integration
- Best Practices
- Process Integration
- Output Format
Basic audit lighthouse https://example.com --output json --output-path report.json Desktop audit lighthouse https://example.com --preset desktop Specific categories lighthouse https://example.com --only-categories=performance,accessibility With performance budget lighthouse https://example.com --budget-path=budget.json Multiple runs for accuracy lighthouse https://example.com --chrome-flags="--headless" -n 3
What does the lighthouse skill do?
Performance and accessibility auditing using Google Lighthouse. Measure Core Web Vitals, accessibility scores, SEO, and best practices. Generate reports and track performance budgets.
How do I install it?
Run `npx skills add a5c-ai/babysitter --skill lighthouse --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From a5c-ai/babysitter, a repository with 1,642 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.