The SEO skill optimizes websites for search engine visibility and ranking by providing technical SEO guidance, on-page optimization strategies, and structured data implementation based on Lighthouse audits and Google Search guidelines. It addresses developers and content managers who need to improve crawlability, create XML sitemaps, establish canonical URLs, and configure robots.txt to solve indexing and duplicate content issues. The skill focuses on the ~25% of ranking factors within its scope—technical SEO and on-page optimization—while acknowledging that content quality, backlinks, and Core Web Vitals require complementary efforts.
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- 24
- skills.sh installs
- 54.8K
- GitHub stars
- 3.1K
- last updated
- Aug 21, 2026
Install
$ npx -y skills add addyosmani/web-quality-skills --skill seo --agent claude-codeInstalls into .claude/skills of the current project.
Files
SEO optimization
Search engine optimization based on Lighthouse SEO audits and Google Search guidelines. Focus on technical SEO, on-page optimization, and structured data.
Evidence-led audit workflow
When a rendered page is available:
- Run live Lighthouse SEO and Agentic Browsing checks when that capability is available; with Chrome DevTools MCP, use
lighthouse_audit. Use the results to localize rendered-page failures. - Inspect signals Lighthouse cannot establish on its own: response headers, redirects,
robots.txt, sitemap coverage, canonical consistency across page templates, structured-data eligibility, and Search Console evidence when the user provides access. - Separate technical crawl/index findings from content quality and authority. Do not invent ranking-factor weights or promise ranking changes.
- Fix the source and re-run the same checks. For indexation or ranking outcomes, report that search-engine validation remains pending.
If live tools are unavailable, use category-specific Lighthouse CLI output plus direct source and HTTP inspection. A Lighthouse SEO score covers a useful subset of technical checks; it is not a prediction of rankings.
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- Repository
- github.com/addyosmani/web-quality-skills
- Categories
- Code Review & Quality, Debugging, Marketing & SEO
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