菜单
Core Web Vitals and page performance analysis. Measures LCP, INP, CLS with current thresholds. Checks HTTP/3 adoption, Lighthouse 13.0 scoring, CrUX field data, and LCP subpart diagnostics. Use when user says "page speed", "performance", "Core Web Vitals", "CWV", "LCP", "INP", "CLS", "HTTP/3".
用 Codex 或 Claude 帮你安装 复制这段 Prompt，粘贴到 Codex、Claude 或其他助手里，让它检查 Skill 页面并帮你完成安装。
基于 SOC 职业分类
Agent Engine Optimization (AEO) - audit whether AI agents can discover, understand, and call your product without human assistance. Checks MCP server presence and quality, OpenAPI spec discoverability, llms.txt agent profile, SDK availability, CLI tool discoverability, and developer docs machine-readability. Use when user says "AEO", "agent-friendly", "MCP server", "agent discovery", "AI agent SEO", "llms.txt", "tool use", "agent-readable".
Full website SEO audit with parallel subagent delegation. Crawls up to 500 pages, detects business type, delegates to 6 specialists, generates health score. Use when user says "audit", "full SEO check", "analyze my site", or "website health check".
Backlink profile analysis, competitor link gap discovery, outreach strategy generation, internal link optimization, and link quality scoring. Use when user says "backlinks", "link building", "outreach", "DR", "domain rating", "referring domains", "anchor text", "link gap", "internal links".
Comprehensive SEO competitor analysis covering competitor identification, keyword overlap and gap analysis, content strategy reverse-engineering, backlink profile comparison, technical SEO benchmarking, and AI search visibility comparison. Use when user says "competitor analysis", "competitive SEO", "competitor keywords", "competitor audit", "SEO benchmark", or "competitive intelligence".
Generate comprehensive, SERP-driven content briefs for writers. Analyzes top-ranking competitors, identifies content gaps, specifies structure, word count, keywords, E-E-A-T requirements, AI citation readiness, and schema recommendations. Use when user says "content brief", "writing brief", "content outline", "article brief", or "create brief for".
Content quality and E-E-A-T analysis with AI citation readiness assessment. Use when user says "content quality", "E-E-A-T", "content analysis", "readability check", "thin content", or "content audit".
| name | seo-performance |
| description | Core Web Vitals and page performance analysis. Measures LCP, INP, CLS with current thresholds. Checks HTTP/3 adoption, Lighthouse 13.0 scoring, CrUX field data, and LCP subpart diagnostics. Use when user says "page speed", "performance", "Core Web Vitals", "CWV", "LCP", "INP", "CLS", "HTTP/3". |
| Metric | Good | Needs Improvement | Poor |
|---|---|---|---|
| LCP (Largest Contentful Paint) | ≤2.5s | 2.5s–4.0s | >4.0s |
| INP (Interaction to Next Paint) | ≤200ms | 200ms–500ms | >500ms |
| CLS (Cumulative Layout Shift) | ≤0.1 | 0.1–0.25 | >0.25 |
INP replaced FID on March 12, 2024. FID fully removed September 9, 2024. Never reference FID.
HTTP/3 reached 35% global adoption (2025), reducing mobile latency by 30%.
curl -sI --http3 https://example.com | grep -i "HTTP/3"
# Or check via headers:
curl -sI https://example.com | grep -i "alt-svc"
| Status | Score | Recommendation |
|---|---|---|
| HTTP/3 enabled (Alt-Svc header present) | 100 | Excellent |
| HTTP/2 only | 50 | Enable HTTP/3 at CDN level (Cloudflare: default, AWS CloudFront: opt-in) |
| HTTP/1.1 | 0 | Upgrade immediately — significant performance penalty |
HTTP/3 is NOT a direct ranking factor but improves TTFB and LCP subparts measurably.
Break down LCP into 4 subparts for targeted optimization:
| Subpart | What It Measures | Target |
|---|---|---|
| TTFB | Server response time | <800ms |
| Resource Load Delay | Time before LCP resource starts loading | Minimize (preload) |
| Resource Load Time | Time to download LCP resource | Compress, CDN, modern formats |
| Element Render Delay | Time from resource loaded to rendered | Reduce render-blocking CSS/JS |
<link rel="preload">font-display: swap, preloadaspect-ratiofont-display: optional or swap| Category | Weight |
|---|---|
| LCP | 35% |
| INP | 30% |
| CLS | 15% |
| HTTP/3 | 10% |
| Resource optimization | 10% |
curl -s "https://www.googleapis.com/pagespeedonline/v5/runPagespeed?url=https://example.com&strategy=mobile&category=performance&category=seo" \
| jq '{performance: .lighthouseResult.categories.performance.score, seo: .lighthouseResult.categories.seo.score, lcp: .loadingExperience.metrics.LARGEST_CONTENTFUL_PAINT_MS, inp: .loadingExperience.metrics.INTERACTION_TO_NEXT_PAINT, cls: .loadingExperience.metrics.CUMULATIVE_LAYOUT_SHIFT_SCORE}'
| Aspect | Lab (Lighthouse) | Field (CrUX) |
|---|---|---|
| Source | Simulated | Real Chrome users |
| Metrics | LCP, TBT, CLS, SI, FCP | LCP, INP, CLS, FCP, TTFB |
| Use case | Debugging, pre-launch | Ranking signal, trend analysis |
| Availability | Any URL | URLs with sufficient traffic only |
Set performance budgets in CI pipelines:
POST https://chromeuxreport.googleapis.com/v1/records:queryRecord?key={API_KEY}
{
"url": "https://example.com/page",
"formFactor": "PHONE",
"metrics": ["largest_contentful_paint", "interaction_to_next_paint", "cumulative_layout_shift"]
}
Replaced old Looker Studio CrUX Dashboard. Provides visual performance trends.
Load on-demand: references/cwv-thresholds.md for detailed thresholds, SPA handling, and measurement methodology.
Cross-reference: seo-data-tools skill for comprehensive GSC/GA4/PSI/CrUX integration guidance.
Generate performance report with: