petrogurcak/technical-seo
plugins/seo/skills/technical-seo/SKILL.md
Audits and sets up technical SEO foundations covering Core Web Vitals (LCP, INP, CLS), crawlability (robots.txt, sitemaps, canonicals), security headers, and mobile-first optimization, with automated audits via claude-in-chrome. Use when auditing for technical SEO issues, setting up technical foundation, fixing Core Web Vitals, or debugging crawlability issues. Trigger phrases: 'technical SEO audit', 'Core Web Vitals', 'robots.txt', 'page speed', 'crawlability', 'security headers'. NOT for structured data (use schema-markup), international/hreflang (use hreflang-i18n), on-page content (use on-page-seo), or keyword research (use keyword-research).
$ install --global
skillsauthnpx skillsauth add petrogurcak/skills technical-seoInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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SKILL.md
- name:
- technical-seo
- description:
- Audits and sets up technical SEO foundations covering Core Web Vitals (LCP, INP, CLS), crawlability (robots.txt, sitemaps, canonicals), security headers, and mobile-first optimization, with automated audits via claude-in-chrome. Use when auditing for technical SEO issues, setting up technical foundation, fixing Core Web Vitals, or debugging crawlability issues. Trigger phrases: 'technical SEO audit', 'Core Web Vitals', 'robots.txt', 'page speed', 'crawlability', 'security headers'. NOT for structured data (use schema-markup), international/hreflang (use hreflang-i18n), on-page content (use on-page-seo), or keyword research (use keyword-research).
- author:
- Petr
- version:
- 2.0.0
Technical SEO
When to use this skill:
- Auditing existing website for technical SEO issues
- Setting up correct technical foundation for new website
- Fixing Core Web Vitals problems
- Debugging crawlability issues
When NOT to use:
- Structured data / JSON-LD → use
schema-markup - International SEO / hreflang → use
hreflang-i18n - On-page content optimization → use
on-page-seo - Keyword research → use
keyword-research - Analytics setup → use
analytics-setup
Quick Router
| User says... | Go to... |
| ----------------------------------------------- | ------------------------ |
| "audit webu", "technické SEO check" | Full Audit (all phases) |
| "core web vitals", "rychlost webu", "PageSpeed" | Phase 1: Performance |
| "robots.txt", "sitemap", "crawl" | Phase 2: Crawlability |
| "HTTPS", "security headers" | Phase 3: Security |
| "mobile", "viewport", "responsive" | Phase 4: Mobile |
| "schema", "structured data" | → Use schema-markup skill |
| "hreflang", "international" | → Use hreflang-i18n skill |
Modes
Audit Mode: Systematická kontrola existujícího webu, identifikace problémů Setup Mode: Správná konfigurace od začátku
Free Tools Stack
| Nástroj | Účel | URL | | --------------------------- | -------------------------------- | ---------------------------------------------------------------------------------------- | | PageSpeed Insights | Core Web Vitals, performance | pagespeed.web.dev | | Google Search Console | Crawl errors, indexing, sitemaps | search.google.com/search-console | | Mobile-Friendly Test | Mobile usability | search.google.com/test/mobile-friendly | | Security Headers | HTTP security headers check | securityheaders.com | | SSL Labs | HTTPS/SSL konfigurace | ssllabs.com/ssltest | | Screaming Frog | Crawl webu (500 URL free) | screamingfrog.co.uk | | Lighthouse | Audit v Chrome DevTools | Built-in Chrome |
Phase 1: Performance (Core Web Vitals)
Metriky
| Metrika | Co měří | Dobrá | Potřebuje zlepšení | Špatná | | ----------------------------------- | ---------------- | ------ | ------------------ | ------ | | LCP (Largest Contentful Paint) | Loading speed | <2.5s | 2.5-4s | >4s | | INP (Interaction to Next Paint) | Interactivity | <200ms | 200-500ms | >500ms | | CLS (Cumulative Layout Shift) | Visual stability | <0.1 | 0.1-0.25 | >0.25 |
Audit Checklist
- [ ] LCP < 2.5s (desktop i mobile)
- [ ] INP < 200ms
- [ ] CLS < 0.1
- [ ] Performance score > 90 (desktop), > 70 (mobile)
- [ ] Obrázky optimalizované (WebP/AVIF, lazy loading)
- [ ] Critical CSS inline
- [ ] Fonts preloaded / font-display: swap
- [ ] Žádný render-blocking JS
Opravy podle problému
| Problém | Řešení | | ---------- | ----------------------------------------------------------- | | Vysoké LCP | Optimalizuj hero image, preload, CDN | | Vysoké INP | Rozděl long tasks, defer non-critical JS | | Vysoké CLS | Definuj size pro img/video, avoid dynamic content injection |
Automated Audit (claude-in-chrome)
Řekni: "Audit Core Web Vitals pro example.com"
Claude provede:
1. navigate → pagespeed.web.dev
2. input → URL webu
3. wait → analýza (mobile + desktop)
4. screenshot → oba reporty
5. extract → Core Web Vitals hodnoty
6. return → strukturovaný přehled s doporučeními
Phase 2: Crawlability
Klíčové prvky
| Prvek | Účel | Soubor/Tag |
| -------------------- | ------------------------- | ------------------------ |
| robots.txt | Řízení crawlerů | /robots.txt |
| XML Sitemap | Mapa stránek pro indexaci | /sitemap.xml |
| Canonical | Určení primární URL | <link rel="canonical"> |
| Meta robots | Indexace per-page | <meta name="robots"> |
| Internal linking | Distribuce link equity | <a href> |
robots.txt šablona
User-agent: *
Allow: /
Disallow: /admin/
Disallow: /api/
Disallow: /*?*utm_
Disallow: /*?*fbclid
Sitemap: https://example.com/sitemap.xml
Audit Checklist
- [ ] robots.txt existuje a je validní
- [ ] Sitemap existuje a je v robots.txt
- [ ] Sitemap obsahuje pouze indexovatelné URL (200 OK)
- [ ] Canonical tag na každé stránce
- [ ] Žádné conflicting signals (canonical vs noindex)
- [ ] Žádné orphan pages (stránky bez interních odkazů)
- [ ] Redirect chains < 3 hops
- [ ] Žádné broken internal links (404)
Běžné chyby
| Chyba | Dopad | Fix | | -------------------------------- | ---------------------- | ------------------------ | | Blokovaný CSS/JS v robots | Broken rendering | Allow /assets/ | | Sitemap s 404/redirects | Crawl budget waste | Pouze 200 OK URL | | Self-referencing canonical chybí | Duplicate content risk | Přidej na každou stránku | | noindex + canonical | Conflicting signals | Vyber jedno |
Structured Data
→ Moved to dedicated schema-markup skill. See that skill for JSON-LD implementation, validation, video schema, deprecations, and AI visibility.
Phase 3: Security
HTTPS Checklist
- [ ] Platný SSL certifikát
- [ ] HTTP → HTTPS redirect (301)
- [ ] Žádný mixed content (HTTP resources na HTTPS stránce)
- [ ] HSTS header aktivní
- [ ] Certifikát pokrývá všechny subdomény (pokud potřeba)
Security Headers
| Header | Účel | Doporučená hodnota |
| ----------------------------- | ------------------------ | ------------------------------------- |
| Strict-Transport-Security | Force HTTPS | max-age=31536000; includeSubDomains |
| X-Content-Type-Options | MIME sniffing prevention | nosniff |
| X-Frame-Options | Clickjacking prevention | SAMEORIGIN |
| Content-Security-Policy | XSS prevention | Dle aplikace |
| Referrer-Policy | Referrer control | strict-origin-when-cross-origin |
| Permissions-Policy | Feature restrictions | Dle potřeby |
Hodnocení (securityheaders.com)
| Grade | Status | | ------ | -------------------- | | A+ / A | Výborné | | B | Dobré, minor issues | | C-D | Potřebuje zlepšení | | F | Kritické, nutná akce |
Automated (claude-in-chrome)
Řekni: "Zkontroluj security headers pro example.com"
Claude provede:
1. navigate → securityheaders.com
2. input → URL
3. screenshot → výsledky
4. return → chybějící headers + nginx/apache config fix
Phase 4: Mobile
Mobile-First Checklist
- [ ] Viewport meta tag správně nastaven
- [ ] Touch targets ≥ 48x48px
- [ ] Čitelný text bez zoomování (16px+ base)
- [ ] Žádný horizontal scroll
- [ ] Mobile PageSpeed > 70
- [ ] Responzivní obrázky (srcset)
- [ ] Tap-to-call na telefony
Viewport meta tag
<meta name="viewport" content="width=device-width, initial-scale=1" />
Internationalization (hreflang)
→ Moved to dedicated hreflang-i18n skill for implementation, validation, cross-domain, and country targeting.
Full Audit Checklist
PERFORMANCE
□ LCP < 2.5s | □ INP < 200ms | □ CLS < 0.1
□ PageSpeed > 90 desktop, > 70 mobile
CRAWLABILITY
□ robots.txt validní | □ sitemap.xml v robots
□ Canonical na všech stránkách | □ Žádné broken links
SECURITY
□ HTTPS + redirect | □ Security headers grade B+
□ Žádný mixed content
MOBILE
□ Mobile-Friendly pass | □ Viewport správný
□ Touch targets ≥ 48x48px | □ Mobile PageSpeed > 70
See also:
□ Structured data → schema-markup skill
□ Hreflang / international SEO → hreflang-i18n skill
Integration
keyword-research → on-page-seo → technical-seo
↓ ↓ ↓
(co cílit) (on-page SEO) (technický základ)
↓
schema-markup (structured data)
hreflang-i18n (international)
↓
analytics-setup
↓
google-analytics MCP (měření)
| Potřeba | Skill |
| ------------------------------------- | ------------------ |
| Jaká klíčová slova cílit? | keyword-research |
| Jak optimalizovat obsah stránky? | on-page-seo |
| Web je pomalý / má technické problémy | technical-seo |
| Structured data / JSON-LD | schema-markup |
| International SEO / hreflang | hreflang-i18n |
| Potřebuji nastavit tracking | analytics-setup |
Official Documentation
| Téma | URL | | ------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------ | | Core Web Vitals | web.dev/vitals | | PageSpeed Insights | developers.google.com/speed/docs/insights | | Robots.txt | developers.google.com/search/docs/crawling-indexing/robots | | Sitemaps | developers.google.com/search/docs/crawling-indexing/sitemaps | | HSTS | developer.mozilla.org/docs/Web/HTTP/Headers/Strict-Transport-Security |
See also: schema-markup skill for Structured Data docs. hreflang-i18n skill for Hreflang / International SEO docs.
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