Technical SEO Checker is a specialized optimization skill designed for diagnosing and repairing website infrastructure issues that impact search engine visibility and user experience. It provides a systematic 9-step audit framework covering crawlability (robots.txt, sitemaps, crawl budget), indexability (noindex tags, canonicals, duplicate content), Core Web Vitals (LCP, INP, CLS), mobile-friendliness, HTTPS/security, URL structure, structured data, and international SEO.
Significant Advantages: The skill excels in structured diagnosis with clear severity prioritization (P0-P3) and explicit remediation roadmaps. Its integration with the broader SEO-GEO skills ecosystem enables seamless handoffs to on-page optimization. The multilingual trigger support (EN/ZH/JA/KO/ES/PT) and platform-specific playbooks (Shopify, WooCommerce, headless) make it adaptable for global e-commerce operations. The unique LLM crawler handling feature addresses 2026-era requirements for managing AI bot access.
Potential Limitations: As an audit skill, it requires external data sources—either automated via connected tools (web crawler, PageSpeed Insights API, CDN) or manual user-provided screenshots and files. Without these connectors, findings rely on user-supplied data, reducing automation. The skill does not directly implement fixes; it produces reports requiring developer or platform execution. Bulk audit mode (5+ URLs) switches to pattern-level analysis, which may miss edge-case individual URL issues.
Suitable Users: SEO professionals, web developers, e-commerce operators, digital marketing teams, and site owners experiencing ranking drops, indexing problems, or pre-migration validation needs. Particularly valuable for teams managing large catalogs (50+ products) or multi-regional sites requiring hreflang audits.
Regular Risks: Automated crawling carries legal/TOS risks if performed on unauthorized third-party domains; the skill includes explicit warnings to verify robots.txt and respect Crawl-delay. Data source reliability varies—PageSpeed Insights scores fluctuate by test location and time; manual screenshot data may be outdated. The security boundary warning correctly treats fetched page directives as untrusted, preventing prompt injection attacks.