technical-seo

What it does

The skill conducts a comprehensive technical SEO assessment across Core Web Vitals, crawlability, site architecture, indexation, redirects, JavaScript SEO, mobile-first indexing, structured data, international SEO, and security. It is activated when the user request involves any of the listed SEO areas and trigger phrases, and it follows a detailed, step-by-step workflow to gather data, analyze each facet, and produce prioritized recommendations.

How it works

1. Site Health Snapshot: collects current Core Web Vitals data, GSC index coverage, manual actions, crawl stats, and baseline metrics.
2. Crawlability Analysis: reviews robots.txt, validates XML sitemap, assesses crawl budget, checks for crawl traps, and verifies resource access for Googlebot.
3. Indexation Review: audits canonical tags, conflicting directives, meta robots, index bloat, pagination handling, and unintended noindex tags.
4. Site Architecture Assessment: maps URL structure, analyzes internal linking, IA, navigation, and URL format consistency.
5. Page Speed Deep Dive: analyzes LCP (server TTFB, render-blocking resources, image optimization), INP (long tasks, event handlers), CLS (dimensions, dynamic content, font loading); evaluates third-party scripts and caching/CDN.
6. Mobile-First Compliance Check: checks content parity, rendering issues, mobile speed, structured data alignment, and lazy-loaded content concerns.
7. JavaScript SEO Evaluation: determines rendering strategy, tests Googlebot rendering, checks content/links requiring JS, assesses crawl budget impact, and validates server-rendered meta/tags.
8. Redirect Chain Audit: identifies chains/loops, mixed 301/302 usage, HTTPS redirects, old URL redirects, and their crawl impact.
9. Structured Data Validation: audits schema markup, checks for missing opportunities, validates JSON-LD syntax, assesses rich results eligibility, and ensures markup matches visible content.
10. International SEO Review: validates hreflang, conflicts with canonical, geotargeting in GSC, international URL structure, and localization signals.
11. Security Assessment: confirms HTTPS, HSTS, security headers, certificate validity, and exposure of sensitive files.
12. Prioritized Recommendation Plan: scores findings by impact and effort, groups into immediates/short-term/medium-term/long-term, estimates traffic impact, and provides implementation specs for top items.

When to use it

Use this skill for requests involving Core Web Vitals optimization, crawlability, rendering, redirects, or sitemaps, as well as related areas like structured data, international SEO, and security.

What it can touch

The skill leverages capabilities across core web vitals, crawlability, site architecture, indexation, JavaScript SEO, redirects, logging, structured data, international SEO, and security domains. It relies on data sources such as CrUX, PageSpeed Insights, GSC, and server/configuration details to produce findings and recommendations.

Caveats

The review relies on external data sources (CrUX, PageSpeed Insights, GSC) and may reflect their availability and accuracy. It does not guarantee outcome-based results and provides guidance based on detected signals and industry-standard thresholds.