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justin06lee
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seo-technical

Audits websites across nine technical SEO categories including crawlability, Core Web Vitals, and structured data.

4|Updated Aug 22, 2025
Search Tags:#structured data#audit#core web vitals#robots.txt#technical seo#crawlability#indexnow
One-click install
npx skills add https://github.com/justin06lee/justin06lee.dev --skill seo-technical-justin06lee
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: seo-technical
Source: https://github.com/justin06lee/justin06lee.dev/tree/main/.gemini/skills/valhalla/skills/seo-technical
Command: npx skills add https://github.com/justin06lee/justin06lee.dev --skill seo-technical-justin06lee

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve? Diagnosing why a site fails to rank or get indexed requires checking dozens of technical signals — robots.txt rules, canonical tags, security headers, Core Web Vitals, JavaScript rendering, and AI crawler policies — which is slow and error-prone when done manually. ## Core Features & Use Cases - Nine-category audit: Covers crawlability, indexability, security, URL structure, mobile, Core Web Vitals, structured data, JavaScript rendering, and IndexNow, producing a scored report with prioritized fixes. - AI crawler and agent readiness: Evaluates robots.txt rules for GPTBot, ClaudeBot, and Google-Extended, plus an Agent-UX score based on accessibility-tree analysis via Playwright. - Real data integration: Optionally pulls PageSpeed Insights, CrUX history, Search Console indexation, and DataForSEO on-page data instead of lab-only estimates. - Use Case: Run a full technical audit on a newly launched Next.js site to catch a canonical conflict between server-rendered HTML and JavaScript-injected tags before it hurts indexing. ## Quick Start Run a technical SEO audit on https://example.com and give me the prioritized issue list.

Frequently Asked Questions about seo-technical

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I run a technical SEO audit on my website?▼

Provide the target URL and the audit checks nine categories: crawlability, indexability, security, URL structure, mobile, Core Web Vitals, structured data, JavaScript rendering, and IndexNow. The output is a scored report with issues grouped by priority from critical to low.

How do I block AI crawlers like GPTBot in robots.txt?▼

Add a User-agent block for each crawler token, such as GPTBot, ClaudeBot, or Google-Extended, with Disallow: /. Blocking Google-Extended affects Gemini training but not Google Search indexing, and user-triggered fetchers like Google-Agent ignore robots.txt entirely.

Does the audit use real Core Web Vitals field data?▼

Yes, when Google API credentials are configured it runs pagespeed_check.py for PageSpeed Insights plus CrUX field data and crux_history.py for 25-week trends. Without credentials it falls back to Lighthouse lab data as a proxy.

Why does JavaScript rendering cause SEO indexing problems?▼

Google may use either version when canonical tags differ between raw HTML and JS-injected output, and it does not render JavaScript on non-200 pages. Critical elements like canonicals, meta robots, and structured data should be served in the initial server-rendered HTML.

What is the Agent-UX score in a technical SEO audit?▼

The Agent-UX score (0-100) measures how well AI agents can interpret a page, based on semantic HTML, label associations, and accessibility-tree analysis via Playwright. Findings are reported as opportunities rather than failures, distinct from Lighthouse's fractional Agentic Browsing category.

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