<objective> Runs a technical SEO audit: fetches and validates robots.txt (`scripts/parse-robots.ts`) and sitemap.xml (`scripts/parse-sitemap.ts`), measures Core Web Vitals via a local Lighthouse wrapper (`scripts/check-cwv.ts` — LCP <2.5s, INP <200ms, CLS <0.1), verifies mobile-first signals, and checks HTTPS/HSTS/redirect chains plus indexability (robots.txt not blocking critical paths, no stray `noindex`, canonical pointing to an indexable URL, no `nofollow` on internal navigation). Does not cover content quality (seo-content), schema (seo-schema), or local-specific signals (seo-local). </objective>

Technical SEO

Workflow

1. Fetch /robots.txt → scripts/parse-robots.ts
2. Fetch /sitemap.xml → scripts/parse-sitemap.ts
3. Run Lighthouse locally → scripts/check-cwv.ts <url>
4. Verify mobile-first signals (viewport, responsive images)
5. Check HTTPS, HSTS, redirects chains

Core Web Vitals (2026)

• LCP: < 2.5s
• INP: < 200ms (replaced FID March 2024)
• CLS: < 0.1

Indexability Checks

• robots.txt doesn't block critical paths
• <meta name="robots"> not noindex on important pages
• Canonical points to indexable URL
• No nofollow on internal navigation

References

• skills/seo/05-technical-seo/ (core-web-vitals, crawlability, mobile-first, structured-data-testing)