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Web Performance Optimization

Checked
xfstudio·vlatest·frontend

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 xfstudio/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

xfstudio

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 xfstudio/skills at 1bf6044db2.

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

Commit
1bf6044db2
Manifest
web-performance-optimization/SKILL.md
Scanned
1 file, 633 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 websites for faster loading times and improved user experience. It analyzes website performance, identifies bottlenecks (like large images or inefficient code), and suggests or implements changes to improve metrics such as First Contentful Paint (FCP) and Largest Contentful Paint (LCP). The tool aims to reduce page load times and enhance overall web application speed.

When to use it

  • Slow website: You've noticed your website is taking too long to load, leading to user frustration or bounce rate issues.
  • Poor Core Web Vitals scores: Your site’s performance metrics (FCP, LCP, CLS) are below Google's recommended thresholds.
  • Mobile optimization needed: You want to ensure your website performs well on mobile devices with limited bandwidth.
  • Before a major launch: You need to optimize the speed of a new website or application before it goes live.

Key capabilities

  • Website performance analysis
  • Identification of performance bottlenecks
  • Image optimization suggestions and implementation
  • Code efficiency recommendations
  • Core Web Vitals improvement

Example prompts

  • "Analyze my website at [website URL] for performance issues."
  • "Suggest optimizations to improve the LCP on this page: [page URL]"
  • "Compress these images and suggest a more efficient format: [image URLs/files]"

Tips & gotchas

The skill's effectiveness depends on accurate access to website content. Ensure you provide correct URLs or file paths for analysis and optimization.