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Core Web Vitals Tuner

Checked
patricio0312rev·vlatest·frontend·MIT

Optimizes website Core Web Vitals (LCP, FID, CLS) automatically for improved user experience and SEO performance.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add patricio0312rev/skills --skill core-web-vitals-tuner -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

patricio0312rev

Taken from the source listing. We haven't verified who controls this account.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

  • No undeclared network calls: passed

    Makes no network calls.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

  • No obfuscated payloads: passed

    No encoded or obfuscated payloads.

    No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.

  • No credential access: passed

    Reads no keys, tokens, keychains or credential files.

    Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.

  • No pipe-to-shell installers: passed

    No pipe-to-shell or download-and-run installers.

    No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.

  • Pinned to a commit: passed

    Scanned patricio0312rev/skills at 79ea6af485.

    The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit
79ea6af485
Manifest
performance/core-web-vitals-tuner/SKILL.md
Scanned
1 file, 107 lines
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
What each check looks for →

About this skill

core-web-vitals-tuner

What it does

This skill enables AI agents to automatically analyze and optimize website performance metrics, specifically targeting Core Web Vitals. It helps improve user experience by adjusting code, assets, or configurations to meet Google's recommended thresholds for loading speed and interactivity.

When to use it

  • Pre-launch optimization: Run checks before deploying a new site to ensure it meets SEO requirements.
  • Performance regression analysis: Identify why page load times increased after recent code changes.
  • Mobile experience tuning: Optimize specific mobile views where network conditions vary significantly.
  • Competitor benchmarking: Compare your site's vitals against industry standards or rival websites.

Key capabilities

  • Automatic discovery of performance bottlenecks affecting Core Web Vitals.
  • Implementation of optimization strategies to improve Largest Contentful Paint (LCP).
  • Adjustment of Cumulative Layout Shift (CLS) and First Input Delay (FID) scores.
  • Reporting on specific metric improvements after automated tuning.

Example prompts

  • "Analyze my homepage's Core Web Vitals and suggest optimizations for LCP."
  • "Tune the mobile version of this site to reduce Cumulative Layout Shift."
  • "Check if recent CSS changes negatively impacted First Input Delay and fix it."

Tips & gotchas

Ensure your website is live or accessible via a staging URL, as the skill requires real-world data to calculate accurate metrics. Results may vary depending on the user's network speed and device type, so test across multiple environments for reliable tuning.