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Web Performance Optimization

Checked
poletron·vlatest·testing·CC0-1.0

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 odjaramillo/custom-rules --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

poletron

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 poletron/custom-rules at aba6668777.

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

Commit
aba6668777
Manifest
registry/skills/web-performance-optimization/SKILL.md
Scanned
2 files, 1,325 lines
Copies in repo
2 — all of them scanned
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

The poletron-web-performance-optimization skill analyzes web pages and provides recommendations for improving their performance. It identifies potential bottlenecks, such as large image sizes or inefficient JavaScript code, and suggests optimizations to reduce load times and improve user experience. The tool aims to enhance website speed and responsiveness across various devices.

When to use it

  • Slow loading websites: Use this skill when a website is taking too long to load, leading to user frustration and potential abandonment.
  • Mobile optimization: Analyze how well a site performs on mobile devices with slower network connections.
  • SEO improvement: Website speed is a ranking factor; use the skill to identify areas for improvement that can boost search engine rankings.
  • Before major website updates: Proactively assess performance before deploying new features or content.

Key capabilities

  • Website analysis and reporting
  • Identification of performance bottlenecks
  • Suggestion of optimization strategies
  • Image size reduction recommendations
  • JavaScript code efficiency assessment

Example prompts

  • "Analyze the performance of https://www.example.com."
  • "What are the biggest factors slowing down this website? [URL]"
  • "Suggest optimizations for a mobile user visiting https://www.example.com."

Tips & gotchas

The skill's effectiveness depends on providing accurate and accessible URLs to analyze. It is designed for public-facing websites; analyzing internal or restricted sites may yield incomplete results.