# Install the "Web Performance & Core Web Vitals" skill

You are installing an AgenticMarket skill into this workspace. Follow these steps exactly.

## 1. Detect your environment and choose the destination file
- Andromity: `.andromity/skills/web-performance-auditor/SKILL.md` (or user scope `~/.andromity/skills/web-performance-auditor/SKILL.md`)
- Antigravity / Gemini CLI: `.agent/skills/web-performance-auditor/SKILL.md`
- Cursor: `.cursor/rules/web-performance-auditor.mdc`
- Claude Code: append to `CLAUDE.md` (or `.claude/skills/web-performance-auditor.md`)
- Windsurf: append to `.windsurfrules`
- Cline / Roo Code: `.clinerules/web-performance-auditor.md`
- GitHub Copilot: append to `.github/copilot-instructions.md`
- ChatGPT / web only: paste the content into Custom Instructions
- Any other agent: save to `.agent/skills/web-performance-auditor/SKILL.md`

## 2. Create the destination file
- Preserve every existing file and configuration entry.
- Create parent folders as needed.
- Never overwrite unrelated content.

## 3. Write exactly this content

```markdown
---
name: web-performance-auditor
description: "Measure, diagnose, and optimize Core Web Vitals (LCP, INP, CLS), render-blocking resources, and Lighthouse scores."
author: google
license: mit
version: 1.0.0
---
# Web Performance & Core Web Vitals Auditor

Analyze web page loading, interactivity, and visual stability according to 2026 Core Web Vitals metrics.

## Metrics
- **Largest Contentful Paint (LCP)**: Target < 2.5s. Optimize hero images, preload critical fonts.
- **Interaction to Next Paint (INP)**: Target < 200ms. Break up long tasks, yield to main thread.
- **Cumulative Layout Shift (CLS)**: Target < 0.1. Set explicit aspect ratios on images and embeds.
```

## 4. Verify
- Confirm the file exists and is readable.
- Report the destination path and confirm the "Web Performance & Core Web Vitals" skill is installed and active.

Skill metadata:
- Slug: web-performance-auditor
- Category: testing
- License: mit
- Source: AgenticMarket