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Web Performance Optimization

Checked
luismarinoc·vlatest·frontend·MIT

Helps with web development, performance optimization, optimization as part of building frontend UIs and user experiences workflows.

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 luismarinoc/antigravity-awesome-skills --skill web-performance-optimization -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

luismarinoc

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 luismarinoc/antigravity-awesome-skills at 1f1ad5eb3e.

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

Commit
1f1ad5eb3e
Manifest
skills/web-performance-optimization/SKILL.md
Scanned
1 file, 635 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

What it does

This skill optimizes website performance by identifying and resolving bottlenecks. It focuses on improving metrics like page load time, Time to Interactive (TTI), and Largest Contentful Paint (LCP). The tool can analyze code, suggest optimizations for images and scripts, and help reduce overall resource size.

When to use it

  • You're experiencing slow website loading times that negatively impact user experience.
  • Your site scores poorly on performance testing tools like Google PageSpeed Insights.
  • You need assistance identifying the root causes of performance issues in your frontend code.
  • You want to improve Core Web Vitals and search engine rankings.

Key capabilities

  • Performance analysis
  • Image optimization suggestions
  • Script optimization recommendations
  • Resource size reduction strategies

Example prompts

  • "Analyze this website's performance: [website URL]"
  • "Suggest optimizations for the images on this page: [page URL]"
  • "How can I reduce the JavaScript bundle size of my application?"

Tips & gotchas

This skill assumes a basic understanding of web development concepts. While it provides suggestions, implementing them may require coding knowledge and potentially refactoring existing code.