hjemmesidekongen/seo-fundamentals
plugins/skjalden/skills/seo-fundamentals/SKILL.md
SEO fundamentals — E-E-A-T quality signals, Core Web Vitals, technical SEO, on-page optimization, keyword strategy, meta tag rules, structured data, and the SEO Health Index scoring model (0-100 weighted composite).
development
Updated Apr 5, 2026
$ install --global
skillsauthnpx skillsauth add hjemmesidekongen/ai seo-fundamentalsInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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SKILL.md
- name:
- seo-fundamentals
- description:
- >
- user_invocable:
- false
- interactive:
- false
- model_tier:
- senior
- depends_on:
- []
- reads:
- []
- writes:
- []
- type:
- data_validation
- - name:
- canonical_and_indexing_correct
- verify:
- Self-referencing canonicals, no accidental noindex, HTTPS consistency
- fail_action:
- Fix canonical/indexing issues — these block ranking entirely
- on_fail:
- SEO issues will limit organic visibility — fix before deploying
- on_pass:
- SEO fundamentals are sound
- origin:
- smedjen
- inspired_by:
- antigravity-awesome-skills/seo-fundamentals + seo-audit + seo-keyword-strategist + seo-meta-optimizer
- ported_date:
- 2026-03-10
- iteration:
- 1
- changes:
- Combined four external SEO skills into one knowledge reference
seo-fundamentals
E-E-A-T (Quality Evaluation)
Not a ranking factor — a quality evaluation framework. Experience: first-hand involvement, original examples. Expertise: subject competence, depth, accuracy. Authoritativeness: recognition by others, citations, links. Trustworthiness: HTTPS, transparency, accuracy. Pages competing in the same space differentiate on trust and experience, not keywords.
Core Web Vitals
LCP < 2.5s (loading), INP < 200ms (interactivity), CLS < 0.1 (visual stability). CWV rarely override poor content — they matter when content quality is comparable. Failing CWV holds back otherwise good pages.
Technical SEO
Crawl control: XML sitemaps (only canonical, indexable URLs), robots.txt (verify no accidental blocking), canonical tags (self-referencing, HTTPS consistent), clean URLs. Performance: mobile-first, semantic HTML, lazy loading, CDN. Key pages within 3 clicks. No orphaned URLs.
On-Page Optimization
Title tags: 50-60 chars, keyword in first 30 chars, unique per page. Meta descriptions: 150-160 chars, action verb + benefit + CTA. URLs: under 60 chars, hyphens, lowercase, keyword early. H1: one per page, primary subject. Images: descriptive filenames, accurate alt text, compression. Internal links: 2-3 per page, descriptive anchors.
Keyword Strategy
Primary keyword: 0.5-1.5% density. 3-5 secondary keywords. 20-30 LSI keywords for semantic coverage. Keyword in first 100 words and 2-3 H2s. Question keywords for People Also Ask. Never stuff — natural placement only.
SEO Health Index
Weighted 0-100: Crawlability 30%, Technical 25%, On-Page 20%, Content/E-E-A-T 15%, Authority 10%. Start each category at 100, subtract by severity: Critical -15 to -30, High -10, Medium -5, Low -1 to -3. Bands: 90-100 Excellent, 75-89 Good, 60-74 Fair, 40-59 Poor, <40 Critical.
See references/process.md for structured data types, audit checklist, findings template, meta tag formulas, and prioritization framework.
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