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Performance

Checked
davila7·vlatest·frontend·MIT

Analyzes frontend code performance, identifying bottlenecks and suggesting optimizations for faster load times and improved user experience.

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 davila7/claude-code-templates --skill performance -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

davila7

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 davila7/claude-code-templates at 79182c51fb.

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

Commit
79182c51fb
Manifest
cli-tool/components/skills/development/performance/SKILL.md
Scanned
1 file, 322 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 frontend skill optimizes web application load times and runtime efficiency by analyzing code structure and suggesting targeted improvements. It helps developers reduce bundle sizes, minimize render-blocking resources, and enhance overall user experience through automated performance tuning.

When to use it

  • Pre-deployment checks: Run before releasing updates to ensure new features don't degrade site speed.
  • Bottleneck identification: Diagnose slow-loading pages or laggy interactions in complex dashboards.
  • Bundle optimization: Reduce JavaScript and CSS payload sizes for faster downloads on mobile networks.
  • Core Web Vitals improvement: Specifically target metrics like Largest Contentful Paint (LCP) and Cumulative Layout Shift (CLS).

Key capabilities

  • Analyzes current codebase for performance anti-patterns
  • Generates actionable recommendations for resource loading strategies
  • Suggests specific code refactors to improve execution speed
  • Identifies opportunities for caching and asset compression

Example prompts

"Analyze my React component tree and suggest changes to reduce initial load time." "What are the most effective ways to optimize image assets in this Next.js project?" "Identify render-blocking resources preventing my dashboard from loading quickly on mobile devices."

Tips & gotchas

This skill focuses specifically on frontend performance metrics; it cannot directly modify backend server logic or database queries. For best results, combine its recommendations with manual testing in browser dev tools to verify real-world impact.