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Core Web Vitals optimization (LCP, INP, CLS) v1.0.0

Use this resource to improve the LCP, INP and CLS of a web page

New

  • 311 downloads
  • 167 likes
  • 130 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install core-web-vitals-fixes-3

With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.

First time: connect the CLI with

npx --yes palatekit@latest login

The agent starts from CrUX field data, records a performance trace, then identifies the element causing the LCP, the interaction delay (INP) or the layout shift (CLS). You get targeted fixes, including Next.js-specific advice.

Mostly picked by

Updated November 2, 2026

Card for the “Core Web Vitals optimization (LCP, INP, CLS)” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
MIT

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What you get

  • SKILL.md: measure before optimizing and fixes per metric
  • references/LCP.md, INP.md and CLS.md: causes and fixes for each metric

Good fit for

  • Your page has a slow LCP on mobile
  • Elements move while the page loads

Not for

    Tags

    • core web vitals
    • lcp
    • inp
    • cls

    About

    You say

    “My hero image has a 4.2 s LCP on mobile: find the cause and fix it.”

    Card for the “Core Web Vitals optimization (LCP, INP, CLS)” skill

    Skill published by practicalswan under the MIT license, delivered in its original version.

    Show more

    How to use it

    1. Install the skill in your agent's skills folder
    2. Ask your agent to improve the LCP, INP and CLS of a web page
    3. Review and adjust the result

    Content preview

    Files

    • CHANGELOG.md3.3 KB
    • LICENSE.txt1.1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • references/CLS.md4 KB
    • references/INP.md4.5 KB
    • references/LCP.md5.2 KB
    • SKILL.md12.6 KB

    Origin and licence

    Listed unmodified

    Author
    practicalswan
    Source
    github.com/practicalswan/agent-skills/tree/6cf63517700aa9ba0b80e711a93837e3bea13d0a/core-web-vitals
    Licence
    MIT

    Notice

    « core-web-vitals » (practicalswan, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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