--- name: technical-seo-checker version: "4.0.0" description: 'Run technical SEO audits covering Core Web Vitals, crawlability, indexing, mobile-friendliness, and site architecture. Use when the user asks to "technical SEO audit", "check page speed", "Core Web Vitals", "crawl errors", "indexing problems", "site health check". For content element issues, see on-page-seo-auditor. For link architecture, see internal-linking-optimizer.' license: Apache-2.0 compatibility: "Claude Code ≥1.0, skills.sh marketplace, ClawHub marketplace, Vercel Labs skills ecosystem. No system packages required. Optional: MCP network access for SEO tool integrations." homepage: "https://github.com/aaron-he-zhu/seo-geo-claude-skills" allowed-tools: WebFetch metadata: author: aaron-he-zhu version: "4.0.0" geo-relevance: "low" tags: - seo - technical seo - page speed - core web vitals - crawlability - indexability - mobile-friendly - site speed - security audit - core-web-vitals - page-speed - lcp - cls - inp - ttfb - crawl-errors - robots-txt - xml-sitemap - hreflang - canonicalization - https - mobile-seo - redirect-chains - javascript-rendering - site-health triggers: - "technical SEO audit" - "check page speed" - "crawl issues" - "Core Web Vitals" - "site indexing problems" - "mobile-friendly check" - "site speed" - "my site is slow" - "Google can't crawl my site" - "mobile issues" - "indexing problems" ---

Technical SEO Checker

> SEO & GEO Skills Library · 20 skills for SEO + GEO · ClawHub · skills.sh

Browse all 20 skills

Research · keyword-research · competitor-analysis · serp-analysis · content-gap-analysis

Build · seo-content-writer · geo-content-optimizer · meta-tags-optimizer · schema-markup-generator

Optimize · on-page-seo-auditor · technical-seo-checker · internal-linking-optimizer · content-refresher

Monitor · rank-tracker · backlink-analyzer · performance-reporter · alert-manager

Cross-cutting · content-quality-auditor · domain-authority-auditor · entity-optimizer · memory-management

This skill performs comprehensive technical SEO audits to identify issues that may prevent search engines from properly crawling, indexing, and ranking your site.

When to Use This Skill

• Launching a new website
• Diagnosing ranking drops
• Pre-migration SEO audits
• Regular technical health checks
• Identifying crawl and index issues
• Improving site performance
• Fixing Core Web Vitals issues

What This Skill Does

1. Crawlability Audit: Checks robots.txt, sitemaps, crawl issues
2. Indexability Review: Analyzes index status and blockers
3. Site Speed Analysis: Evaluates Core Web Vitals and performance
4. Mobile-Friendliness: Checks mobile optimization
5. Security Check: Reviews HTTPS and security headers
6. Structured Data Audit: Validates schema markup
7. URL Structure Analysis: Reviews URL patterns and redirects
8. International SEO: Checks hreflang and localization

How to Use

Full Technical Audit

Perform a technical SEO audit for [URL/domain]

Specific Issue Check

Check Core Web Vitals for [URL]

Audit crawlability and indexability for [domain]

Pre-Migration Audit

Technical SEO checklist for migrating [old domain] to [new domain]

Data Sources

> See CONNECTORS.md for tool category placeholders.

With ~~web crawler + ~~page speed tool + ~~CDN connected: Claude can automatically crawl the entire site structure via ~~web crawler, pull Core Web Vitals and performance metrics from ~~page speed tool, analyze caching headers from ~~CDN, and fetch mobile-friendliness data. This enables comprehensive automated technical audits.

With manual data only: Ask the user to provide:

1. Site URL(s) to audit
2. PageSpeed Insights screenshots or reports
3. robots.txt file content
4. sitemap.xml URL or file

Proceed with the full audit using provided data. Note in the output which findings are from automated crawl vs. manual review.

Instructions

When a user requests a technical SEO audit:

1. Audit Crawlability

```markdown ## Crawlability Analysis

### Robots.txt Review

URL: [domain]/robots.txt Status: [Found/Not Found/Error]

Current Content: ``` [robots.txt content] ```

| Check | Status | Notes | |-------|--------|-------| | File exists | ✅/❌ | [notes] | | Valid syntax | ✅/⚠️/❌ | [errors found] | | Sitemap declared | ✅/❌ | [sitemap URL] | | Important pages blocked | ✅/⚠️/❌ | [blocked paths] | | Assets blocked | ✅/⚠️/❌ | [CSS/JS blocked?] | | Correct user-agents | ✅/⚠️/❌ | [notes] |

Issues Found: - [Issue 1] - [Issue 2]

Recommended robots.txt: ``` User-agent: * Allow: / Disallow: /admin/ Disallow: /private/

Sitemap: https://example.com/sitemap.xml ```

---

### XML Sitemap Review

Sitemap URL: [URL] Status: [Found/Not Found/Error]

| Check | Status | Notes | |-------|--------|-------| | Sitemap exists | ✅/❌ | [notes] | | Valid XML format | ✅/⚠️/❌ | [errors] | | In robots.txt | ✅/❌ | [notes] | | Submitted to ~~search console | ✅/⚠️/❌ | [notes] | | URLs count | [X] | [appropriate?] | | Only indexable URLs | ✅/⚠️/❌ | [notes] | | Includes priority | ✅/⚠️ | [notes] | | Includes lastmod | ✅/⚠️ | [accurate?] |

Issues Found: - [Issue 1]

---

### Crawl Budget Analysis

| Factor | Status | Impact | |--------|--------|--------| | Crawl errors | [X] errors | [Low/Med/High] | | Duplicate content | [X] pages | [Low/Med/High] | | Thin content | [X] pages | [Low/Med/High] | | Redirect chains | [X] found | [Low/Med/High] | | Orphan pages | [X] found | [Low/Med/High] |

Crawlability Score: [X]/10 ```

1. Audit Indexability

...