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core-web-vitals

Identify and optimize LCP, INP, and CLS for web pages.

Updated Mar 21, 2026
Search Tags:#frontend#web-performance#web-vitals#LCP#CLS#INP
One-click install
npx skills add https://github.com/d0whc3r/hackaton-cubepath --skill core-web-vitals-d0whc3r
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: core-web-vitals
Source: https://github.com/d0whc3r/hackaton-cubepath/tree/main/.agents/skills/core-web-vitals
Command: npx skills add https://github.com/d0whc3r/hackaton-cubepath --skill core-web-vitals-d0whc3r

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Core Web Vitals optimization helps web developers improve page experience and search ranking by focusing on LCP, INP, and CLS through practical patterns, checks, and guidance.

Core Features & Use Cases

  • LCP/INP/CLS improvement: guidance and best practices to reduce load time and layout shifts.
  • Performance auditing: templates for audits, budgets, and measurement with web-vitals and Chrome UX data.
  • Use Case: optimize a marketing page with a hero image and lazy-loaded components to achieve LCP under 2.5s and CLS under 0.1.

Quick Start

Improve a given page's LCP, INP, and CLS by applying standard web-vitals optimization techniques and compiling a prioritized action list.

Frequently Asked Questions about core-web-vitals

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

FAQPage Schema
How do I optimize Largest Contentful Paint to meet target thresholds?▼

Optimize Largest Contentful Paint (LCP) by inspecting HTML/CSS, server timing, and resource loading patterns. Apply network hints and prioritization strategies for marketing pages, dashboards, and SPAs to achieve LCP under 2.5s.

What is the best way to reduce Cumulative Layout Shift on a web page?▼

Reduce Cumulative Layout Shift (CLS) by applying rendering strategies and best practices that ensure visual stability. Target a CLS score under 0.1 by addressing asset loading patterns and layout components.

How do I improve Interactivity to Next Paint for better page experience?▼

Improve Interactivity to Next Paint (INP) by analyzing rendering strategies and resource loading patterns that cause delays. Apply actionable recommendations and checklists to optimize responsiveness and meet target thresholds.

Can I perform a web performance audit for Single Page Applications using this approach?▼

Yes, performance auditing applies to Single Page Applications (SPAs) alongside marketing sites and dashboards. It handles resource loading and rendering strategies specific to SPAs, compiling a prioritized action list for optimization.

Why does my hero image load slowly and cause layout shifts on my marketing page?▼

A hero image loading slowly often fails LCP and CLS targets due to unoptimized resource loading patterns. Fix this by applying network hints, adjusting asset loading, and implementing lazy-loaded components correctly.

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