core-web-vitals

Diagnose and optimize Core Web Vitals for LCP, INP, and CLS.

872|122|Updated Feb 26, 2026
One-click install
npx skills add https://github.com/kostja94/marketing-skills --skill core-web-vitals-kostja94
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: core-web-vitals
Source: https://github.com/kostja94/marketing-skills/tree/main/skills/seo/technical/core-web-vitals
Command: npx skills add https://github.com/kostja94/marketing-skills --skill core-web-vitals-kostja94

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill addresses issues with Core Web Vitals (CWV), which are crucial for SEO rankings and user experience by focusing on page speed, responsiveness, and visual stability.

Core Features & Use Cases

  • Diagnose CWV Issues: Identifies problems with LCP, INP, and CLS.
  • Provide Optimization Strategies: Offers specific fixes for common causes of poor CWV scores.
  • Use Case: A website owner notices a drop in search rankings and uses this skill to identify that LCP is too high due to render-blocking resources, receiving actionable steps to fix it.

Quick Start

Use the core-web-vitals skill to analyze and optimize the Largest Contentful Paint for the provided website URL.

Frequently Asked Questions about core-web-vitals

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I fix a high Largest Contentful Paint score for my website?

To fix a high Largest Contentful Paint (LCP) score, you must address server response delays, eliminate render-blocking resources, and optimize image loading. This skill diagnoses these specific bottlenecks and provides technical SEO steps to achieve Google's recommended field data thresholds.

What is causing Cumulative Layout Shift on my web pages?

Cumulative Layout Shift (CLS) is caused by visual instability, often from dynamically loaded content or unoptimized images. This skill helps diagnose poor CLS scores and offers specific optimization strategies to improve visual stability for better SEO rankings.

How do I improve Interaction to Next Paint for better SEO?

Improving Interaction to Next Paint (INP) requires reducing main thread activity to ensure page responsiveness. This skill identifies main thread bottlenecks and provides technical guidance to optimize page speed and meet Google's performance thresholds.

What is the best way to optimize Core Web Vitals for technical SEO?

The best way to optimize Core Web Vitals (CWV) is to diagnose LCP, INP, and CLS issues and apply specific fixes for server response and render-blocking resources. This skill provides actionable technical SEO guidance to improve page speed and search rankings.

Can I diagnose page speed bottlenecks using a website URL?

Yes, you can diagnose page speed bottlenecks by providing a website URL. This skill analyzes the URL to identify performance issues related to server response, render-blocking resources, and main thread activity affecting your Core Web Vitals.

Why did my search rankings drop after failing Core Web Vitals thresholds?

Search rankings drop because failing Core Web Vitals thresholds negatively impacts SEO and user experience. This skill identifies specific performance bottlenecks like high LCP and provides actionable steps to fix them and restore rankings.