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Page Speed and Core Web Vitals v1.0.0

Use this resource to improve a site's loading speed and Lighthouse score

New

  • 415 downloads
  • 121 likes
  • 224 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install web-performance-vitals

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 runs a Lighthouse audit, finds the causes of a poor LCP, CLS or INP, and applies the matching fixes: images, fonts, scripts. It ends with a checklist to confirm the targets. You get a faster page that stays stable while loading.

Mostly picked by

Updated November 2, 2026

Lighthouse scores and targets for the three LCP, CLS and INP metrics.

Details

Works in
Install guides
Generates with
Your agent's model
Uses
  • Node.js
  • Chrome
Licence
MIT

Similar resources

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What you get

  • SKILL.md: Lighthouse audit and score targets
  • Causes and fixes for LCP, CLS and INP
  • Best practices for images, fonts and JavaScript
  • Lighthouse CI setup and a final checklist

Good fit for

  • Raising the Lighthouse score of a showcase site or a shop
  • Fixing images or elements that jump while loading
  • Setting performance targets before a redesign

Not for

  • Tuning a database or a server
  • Editorial SEO work without changing the page code
  • Native mobile apps

Tags

  • performance
  • lighthouse
  • web vitals
  • images
  • fonts

About

You say

"My LCP is too slow on the home page. Run Lighthouse and fix what can be fixed."

Lighthouse scores and targets for the three LCP, CLS and INP metrics.

Skill published by dembrandt under the MIT license.

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Prerequisites

You bring
The address or code of the page to optimize
Dependencies
Node.js and Chrome

How to use it

  1. Give the page address or the project to audit.
  2. The agent runs the audit and proposes fixes in order of impact.
  3. Run Lighthouse again and go through the checklist.

Content preview

Files

  • LICENSE1.1 KB
  • NOTICE-PALATEKIT.md0.4 KB
  • SKILL.md8.1 KB

Origin and licence

Modified by PalateKit

Author
dembrandt
Source
github.com/dembrandt/dembrandt-skills/tree/c4ad177dea5b864f779f8c722f28cf04f760cb22/skills/performance-and-web-vitals
Licence
MIT

Notice

Version modifiée de « performance-and-web-vitals » (dembrandt, MIT) : traduction française et fiche par PalateKit.

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Frequently asked questions

Do I need to install Lighthouse?

The agent runs it with npx, which needs Node.js. You can also use the Lighthouse tab in Chrome DevTools.

Are the score targets mandatory?

No, they are common goals (performance 90 or more, accessibility 100). Adjust them to your site.