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LCP diagnosis and optimization v1.0.0

Use this resource to diagnose and reduce how long a page's main content takes to appear

New

  • 356 downloads
  • 116 likes
  • 180 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install lcp-performance-debugging

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 records a performance trace, identifies the LCP element and splits its delay into sub-parts. It then proposes fixes ranked by expected gain. You get a measured diagnosis and a list of actions.

Mostly picked by

Updated November 2, 2026

Card for the “LCP diagnosis and optimization” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
Apache-2.0

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What you get

  • SKILL.md: five-step procedure, from the trace to HTML inspection
  • references/lcp-breakdown.md: split of the LCP delay into sub-parts
  • references/optimization-strategies.md: optimization strategies with target share of the delay

Good fit for

  • Your hero image takes too long to appear on mobile
  • Your Core Web Vitals are poor on the home page

Not for

    Tags

    • lcp
    • performance
    • core web vitals
    • loading

    About

    You say

    “Analyze the LCP of my home page: the hero image shows up after 4 seconds.”

    Card for the “LCP diagnosis and optimization” skill

    Skill published by chromedevtools under the Apache-2.0 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 diagnose and reduce how long a page's main content takes to appear
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE11.1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • references/elements-and-size.md1.3 KB
    • references/lcp-breakdown.md2.5 KB
    • references/lcp-snippets.md2.4 KB
    • references/optimization-strategies.md2.1 KB
    • SKILL.md6.5 KB

    Origin and licence

    Listed unmodified

    Author
    chromedevtools
    Source
    github.com/chromedevtools/chrome-devtools-mcp/tree/63170b11a2fa74d5ceea757194d7b25f3e145f68/skills/debug-optimize-lcp
    Licence
    Apache-2.0

    Notice

    « debug-optimize-lcp » (chromedevtools, Apache-2.0) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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