core-web-vitals
When the user wants to optimize Core Web Vitals, fix LCP, INP, or CLS issues. Also use when the user mentions "Core Web Vitals," "CWV," "LCP," "INP," "CLS," "FID," "page speed," "page performance," "Largest Contentful Paint," "Interaction to Next Paint," "Cumulative Layout Shift," or "Page Experience." For GSC CWV, use google-search-console.
npx skills add kostja94/marketing-skills --skill core-web-vitals --agent cursor
Same command for any agent — swap --agent for claude-code, codex, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# SEO Technical: Core Web Vitals Guides optimization of Core Web Vitals (CWV)—Google's user experience metrics that affect search ranking. CWV are confirmed ranking factors for mobile and desktop. **When invoking**: On **first use**, if helpful, open with 1–2 sentences on what this skill covers and why it matters, then provide the main output. On **subsequent use** or when the user asks to skip, go directly to the main output. ## Scope (Technical SEO) - **LCP** (Largest Contentful Paint): Loading performance; time to render largest content element - **INP** (Interaction to Next Paint): Responsiveness; replaced FID on March 12, 2024 - **CLS** (Cumulative Layout Shift): Visual stability; unexpected layout shifts ## Target Thresholds (75th percentile, field data) | Metric | Target | Good | Needs Improvement | Poor | |--------|--------|------|-------------------|------| | **LCP** | ≤2.5s | ≤2.5s | 2.5–4.0s | >4.0s | | **INP** | ≤200ms | ≤200ms | 200–500ms | >500ms | | **CLS** | <0.1 | ≤0.1 | 0.1–0.25 | >0.25 | **Source**: [Google Page Experience](https://developers.google.com/search/docs/appearance/page-experience) ## Initial Assessment **Check for project context first:** If `.claude/
- Scope (Technical SEO)
- Target Thresholds (75th percentile, field data)
- Initial Assessment
- LCP Optimization
- INP Optimization
- CLS Optimization
- Tools & Monitoring
- Output Format
- Related Skills
What does the core-web-vitals skill do?
When the user wants to optimize Core Web Vitals, fix LCP, INP, or CLS issues. Also use when the user mentions "Core Web Vitals," "CWV," "LCP," "INP," "CLS," "FID," "page speed," "page performance," "Largest Contentful Paint," "Interaction to Next Paint," "Cumulative Layout Shift," or "Page Experience." For GSC CWV, use google-search-console.
How do I install it?
Run `npx skills add kostja94/marketing-skills --skill core-web-vitals --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From kostja94/marketing-skills, a repository with 848 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.