Loading skill
Install any skill in seconds. Free to start, no credit card required.
Get Started Free →SEO fundamentals, E-E-A-T, Core Web Vitals, and Google algorithm principles.
.claude/skills/davila7-seo-fundamentals/SKILL.md| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-11 | ✗→✓ | ▲ Improved | -8% | 0% |
| case-07 | ✓→✗ | ▼ Worse | -2% | 0% |
| case-02 | ✓→✓ | ＝ Same ✓ | 19% | 0% |
| case-03 | ✓→✓ | ＝ Same ✓ | -17% | 0% |
| case-04 | ✓→✓ | ＝ Same ✓ | 5% | 0% |
> Principles for search engine visibility.
| Principle | Signals | |-----------|---------| | Experience | First-hand knowledge, real examples | | Expertise | Credentials, depth of knowledge | | Authoritativeness | Backlinks, mentions, industry recognition | | Trustworthiness | HTTPS, transparency, accurate info |
| Metric | Target | Measures | |--------|--------|----------| | LCP | < 2.5s | Loading performance | | INP | < 200ms | Interactivity | | CLS | < 0.1 | Visual stability |
| Element | Purpose | |---------|---------| | XML sitemap | Help crawling | | robots.txt | Control access | | Canonical tags | Prevent duplicates | | HTTPS | Security signal |
| Factor | Impact | |--------|--------| | Page speed | Core Web Vital | | Mobile-friendly | Ranking factor | | Clean URLs | Crawlability |
| Element | Best Practice | |---------|---------------| | Title tag | 50-60 chars, keyword front | | Meta description | 150-160 chars, compelling | | H1 | One per page, main keyword | | H2-H6 | Logical hierarchy | | Alt text | Descriptive, not stuffed |
| Factor | Importance | |--------|------------| | Depth | Comprehensive coverage | | Freshness | Regular updates | | Uniqueness | Original value | | Readability | Clear writing |
| Type | Use | |------|-----| | Article | Blog posts, news | | Organization | Company info | | Person | Author profiles | | FAQPage | Q&A content | | Product | E-commerce | | Review | Ratings | | BreadcrumbList | Navigation |
| ✅ Do | ❌ Don't | |-------|----------| | AI draft + human edit | Publish raw AI content | | Add original insights | Copy without value | | Expert review | Skip fact-checking | | Follow E-E-A-T | Keyword stuffing |
| Priority | Factor | |----------|--------| | 1 | Quality, relevant content | | 2 | Backlinks from authority sites | | 3 | Page experience (Core Web Vitals) | | 4 | Mobile optimization | | 5 | Technical SEO fundamentals |
| Metric | Tool | |--------|------| | Rankings | Search Console, Ahrefs | | Traffic | Analytics | | Core Web Vitals | PageSpeed Insights | | Indexing | Search Console | | Backlinks | Ahrefs, Semrush |
> Remember: SEO is a long-term game. Quality content + technical excellence + patience = results.
| Case | Status | Duration (ms) | Turns | Tokens | Tool calls | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Without | With | Δ | Without | With | Δ | Without | With | Δ | Without | With | Δ | ||
case-01 | fail→fail | 14,278 | 10,130 | -29% | 1 | 1 | 0% | 2,514 | 2,618 | +4% | 0 | 0 | — |
case-02 | pass→pass | 11,850 | 9,670 | -18% | 1 | 1 | 0% | 2,259 | 2,689 | +19% | 0 | 0 | — |
case-03 | pass→pass | 11,126 | 5,214 | -53% | 1 | 1 | 0% | 2,109 | 1,743 | -17% | 0 | 0 | — |
case-04 | pass→pass | 12,198 | 8,832 | -28% | 1 | 1 | 0% | 2,230 | 2,345 | +5% | 0 | 0 | — |
case-05 | pass→pass | 11,680 | 10,702 | -8% | 1 | 1 | 0% | 2,052 | 2,360 | +15% | 0 | 0 | — |
case-06 | fail→fail | 10,033 | 9,099 | -9% | 1 | 1 | 0% | 1,757 | 2,311 | +32% | 0 | 0 | — |
case-07 | pass→fail | 14,093 | 10,074 | -29% | 1 | 1 | 0% | 2,361 | 2,311 | -2% | 0 | 0 | — |
case-08 | pass→pass | 11,587 | 6,808 | -41% | 1 | 1 | 0% | 1,999 | 1,988 | -1% | 0 | 0 | — |
case-09 | pass→pass | 13,052 | 11,954 | -8% | 1 | 1 | 0% | 2,287 | 2,716 | +19% | 0 | 0 | — |
case-10 | pass→pass | 11,285 | 5,980 | -47% | 1 | 1 | 0% | 2,053 | 1,824 | -11% | 0 | 0 | — |
case-11 | fail→pass | 8,418 | 4,104 | -51% | 1 | 1 | 0% | 1,573 | 1,453 | -8% | 0 | 0 | — |
case-12 | pass→pass | 10,976 | 10,284 | -6% | 1 | 1 | 0% | 1,996 | 2,428 | +22% | 0 | 0 | — |
case-13 | pass→pass | 14,338 | 12,978 | -9% | 1 | 1 | 0% | 2,304 | 2,888 | +25% | 0 | 0 | — |
case-14 | pass→pass | 12,556 | 8,951 | -29% | 1 | 1 | 0% | 2,547 | 2,438 | -4% | 0 | 0 | — |
case-15 | fail→fail | 14,887 | 12,627 | -15% | 1 | 1 | 0% | 2,457 | 2,759 | +12% | 0 | 0 | — |
case-16 | pass→pass | 12,576 | 12,784 | +2% | 1 | 1 | 0% | 2,125 | 2,819 | +33% | 0 | 0 | — |
case-17 | pass→pass | 9,163 | 7,503 | -18% | 1 | 1 | 0% | 1,698 | 2,069 | +22% | 0 | 0 | — |
case-18 | pass→pass | 12,301 | 10,272 | -16% | 1 | 1 | 0% | 2,106 | 2,447 | +16% | 0 | 0 | — |
case-19 | pass→pass | 9,441 | 5,815 | -38% | 1 | 1 | 0% | 1,635 | 1,716 | +5% | 0 | 0 | — |
case-20 | fail→fail | 13,788 | 11,850 | -14% | 1 | 1 | 0% | 2,564 | 2,930 | +14% | 0 | 0 | — |
case-21 | pass→pass | 13,364 | 10,835 | -19% | 1 | 1 | 0% | 2,353 | 2,672 | +14% | 0 | 0 | — |
case-22 | pass→pass | 18,699 | 14,477 | -23% | 1 | 1 | 0% | 2,909 | 3,003 | +3% | 0 | 0 | — |
DecimalAI ran this skill against gemini-3.6-flash twice over the same eval suite — once with the skill loaded and once without — and compared the two runs case by case. 22 cases were attempted. The headline lift of 0 percentage points is the difference between those two pass rates over the 22 comparable cases. 1 case got worse with the skill loaded, and it is included in that figure.
Without the skill loaded, the model failed this case. With it loaded, the same prompt on the same model passed. This is one improved case from the latest verified run; every case, including any that regressed, is in the table above.
Other measured skills in the registry, with their headline benchmark lift.