nextjs-seo-audit

A comprehensive SEO audit skill that teaches you how to analyse HTML pages and provide actionable recommendations across 10 skill areas.

When to activate

Use this skill when the user asks you to:

• Run an SEO audit on a page, component, or full website
• Fix specific SEO issues (headings, meta tags, schema, speed, etc.)
• Optimise a Next.js or HTML page for search engines
• Validate structured data (JSON-LD), Open Graph, or Twitter Cards
• Check page performance, semantic HTML, or mobile-friendliness
• Analyse outbound links or backlink strategy

How to run a full audit

When performing a full SEO audit, run all 10 sub-skills in order on the provided HTML. Read each sub-skill's SKILL.md for the detailed checklist:

| # | Skill | SKILL.md | Focus area | |---|---|---|---| | 1 | On-Page Optimization | skills/onpage-optimization/SKILL.md | Headings, keywords, internal links | | 2 | Schema JSON Optimization | skills/schema-json-optimization/SKILL.md | JSON-LD structured data | | 3 | Meta Data Optimization | skills/meta-data-optimization/SKILL.md | Title, description, OG, Twitter Cards | | 4 | Semantic Layout | skills/semantic-layout/SKILL.md | HTML5 semantic elements, accessibility | | 5 | Site Speed Optimization | skills/site-speed-optimization/SKILL.md | Scripts, stylesheets, images | | 6 | Mobile Optimization | skills/mobile-optimization/SKILL.md | Viewport, responsive design, touch targets | | 7 | Backlink Monitoring | skills/backlink-monitoring/SKILL.md | External links, dofollow/nofollow strategy | | 8 | International SEO | skills/international-seo/SKILL.md | Hreflang, multi-language, regional targeting | | 9 | Technical SEO | skills/technical-seo/SKILL.md | Sitemap, robots.txt, canonical, crawlability | | 10 | Core Web Vitals | skills/core-web-vitals/SKILL.md | LCP, CLS, INP, performance scoring |

Output format

For each check, report:

• Status: ✅ PASS, ⚠️ WARN, or ❌ FAIL
• Message: Clear, actionable description of the finding

At the end, provide a summary:

SEO Audit Summary
─────────────────
✅ Pass:  X
⚠️ Warn:  Y
❌ Fail:  Z
──────────────
Score: XX%

Global thresholds reference

These thresholds are used across all sub-skills:

| Parameter | Value | |---|---| | Title length | 30–60 characters | | Meta description length | 120–160 characters | | Keyword density (ideal) | 1.0–3.0% | | Internal links (min per page) | 3 | | Max fixed-width before warning | 500px | | Min touch target size | 48px × 48px | | Max inline CSS length | 5000 characters | | Max external scripts | 10 | | Required OG tags | og:title, og:description, og:image, og:url, og:type | | Required Twitter Card tags | twitter:card, twitter:title, twitter:description | | Required semantic elements | header, main, footer, nav | | Recommended semantic elements | article, section, aside, figure |