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Performance Optimization

Checked
sanky369·vlatest·frontend·MIT

Helps with 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 sanky369/vibe-building-skills --skill 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

sanky369

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 sanky369/vibe-building-skills at e9714d8dec.

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

Commit
e9714d8dec
Manifest
skills/frontend-design/performance-optimization/SKILL.md
Scanned
2 files, 310 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 helps optimize frontend performance. It identifies and suggests improvements for slow loading times, inefficient code, and other bottlenecks impacting user experience. The tool can analyze JavaScript bundles, CSS delivery, and image optimization to provide actionable recommendations.

When to use it

  • Slow website load times: When users are complaining about a sluggish website or web application.
  • High bounce rate: If your analytics show a significant number of visitors leaving before interacting with the site.
  • Poor Core Web Vitals scores: To improve metrics like Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS).
  • Mobile performance issues: When users on mobile devices experience significantly slower loading times compared to desktop users.

Key capabilities

  • JavaScript bundle analysis
  • CSS delivery optimization suggestions
  • Image optimization recommendations
  • Identification of frontend bottlenecks

Example prompts

  • "Analyze the JavaScript bundles for my website and suggest optimizations."
  • "How can I improve the Largest Contentful Paint (LCP) score?"
  • "What are some ways to reduce the size of my CSS files?"

Tips & gotchas

This skill requires access to your frontend codebase or deployment environment. The recommendations provided should be evaluated and implemented carefully, as aggressive optimizations can sometimes introduce unexpected issues.