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Web Performance Optimization

Checked
johnkmcleod9·vlatest·testing·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 johnkmcleod9/antigravity-skills-workflows --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

johnkmcleod9

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 johnkmcleod9/antigravity-skills-workflows at d3a39016b3.

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

Commit
d3a39016b3
Manifest
.agent/skills/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 website performance by identifying and addressing bottlenecks. It can analyze page load times, identify large assets, and suggest improvements like image optimization or code minification. The goal is to improve user experience through faster loading speeds and reduced resource consumption.

When to use it

  • You've noticed your website is slow to load for users.
  • Your site has a high bounce rate due to poor performance.
  • You want to improve your website’s SEO ranking, as page speed is a factor.
  • You are preparing a website for increased traffic and need to ensure scalability.

Key capabilities

  • Website Performance Analysis
  • Asset Optimization Suggestions
  • Code Minification Recommendations
  • Image Compression Guidance

Example prompts

  • "Analyze the performance of my website at [website URL] and identify areas for improvement."
  • "Suggest ways to optimize images on this page: [page URL]."
  • "What are some common causes of slow website loading times?"

Tips & gotchas

This skill requires access to the target website's URLs. The recommendations provided may require technical expertise to implement effectively, as they often involve modifying code or server configurations.