Andrew Yim
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117 lines
3.0 KiB
Markdown
117 lines
3.0 KiB
Markdown
---
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name: seo-core-web-vitals
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description: "Core Web Vitals analyzer for LCP, FID, CLS, INP performance metrics. Triggers: Core Web Vitals, page speed, LCP, CLS, FID, INP, performance."
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allowed-tools: mcp__firecrawl__*, mcp__perplexity__*
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---
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# SEO Core Web Vitals
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## Purpose
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Analyze Core Web Vitals performance metrics and provide optimization recommendations.
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## Core Capabilities
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1. **LCP** - Largest Contentful Paint measurement
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2. **FID/INP** - Interactivity metrics
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3. **CLS** - Cumulative Layout Shift
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4. **Recommendations** - Optimization guidance
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## Metrics Thresholds
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| Metric | Good | Needs Work | Poor |
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|--------|------|------------|------|
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| LCP | ≤2.5s | 2.5-4s | >4s |
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| FID | ≤100ms | 100-300ms | >300ms |
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| CLS | ≤0.1 | 0.1-0.25 | >0.25 |
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| INP | ≤200ms | 200-500ms | >500ms |
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## Data Sources
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### Option 1: PageSpeed Insights (Recommended)
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Use external tool and input results:
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- Visit: https://pagespeed.web.dev/
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- Enter URL, run test
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- Provide scores to skill
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### Option 2: Research Best Practices
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```
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mcp__perplexity__search: "Core Web Vitals optimization [specific issue]"
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```
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## Workflow
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1. Request PageSpeed Insights data from user
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2. Analyze provided metrics
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3. Identify failing metrics
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4. Research optimization strategies
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5. Provide prioritized recommendations
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## Common LCP Issues
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| Cause | Fix |
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|-------|-----|
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| Slow server response | Improve TTFB, use CDN |
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| Render-blocking resources | Defer non-critical CSS/JS |
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| Slow resource load | Preload LCP image |
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| Client-side rendering | Use SSR/SSG |
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## Common CLS Issues
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| Cause | Fix |
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|-------|-----|
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| Images without dimensions | Add width/height attributes |
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| Ads/embeds without space | Reserve space with CSS |
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| Web fonts causing FOIT/FOUT | Use font-display: swap |
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| Dynamic content injection | Reserve space, use transforms |
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## Common INP Issues
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| Cause | Fix |
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|-------|-----|
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| Long JavaScript tasks | Break up tasks, use web workers |
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| Large DOM size | Reduce DOM nodes |
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| Heavy event handlers | Debounce, optimize listeners |
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| Third-party scripts | Defer, lazy load |
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## Output Format
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```markdown
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## Core Web Vitals: [URL]
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### Scores
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| Metric | Mobile | Desktop | Status |
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|--------|--------|---------|--------|
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| LCP | Xs | Xs | Good/Poor |
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| FID | Xms | Xms | Good/Poor |
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| CLS | X.XX | X.XX | Good/Poor |
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| INP | Xms | Xms | Good/Poor |
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### Overall Score
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- Mobile: X/100
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- Desktop: X/100
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### Priority Fixes
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1. [Highest impact recommendation]
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2. [Second priority]
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### Detailed Recommendations
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[Per-metric optimization steps]
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```
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## Limitations
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- Requires external PageSpeed Insights data
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- Lab data may differ from field data
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- Some fixes require developer implementation
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- Third-party scripts may be difficult to optimize
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## Notion Output (Required)
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All audit reports MUST be saved to OurDigital SEO Audit Log:
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- **Database ID**: `2c8581e5-8a1e-8035-880b-e38cefc2f3ef`
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- **Properties**: Issue (title), Site (url), Category, Priority, Found Date, Audit ID
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- **Language**: Korean with English technical terms
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- **Audit ID Format**: [TYPE]-YYYYMMDD-NNN
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