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Javascript Expert

Checked
personamanagmentlayer·vlatest·backend·Apache-2.0

Expertly debugs, optimizes, and develops complex JavaScript backend code, ensuring performance and maintainability.

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 personamanagmentlayer/pcl --skill javascript-expert -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

personamanagmentlayer

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 personamanagmentlayer/pcl at 79ccaa9820.

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

Commit
79ccaa9820
Manifest
stdlib/languages/javascript-expert/SKILL.md
Scanned
3 files, 811 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 enables AI agents to expertly debug, optimize, and develop complex JavaScript backend code. It leverages deep knowledge of modern ECMAScript (ES2024+), Node.js, and the npm ecosystem to produce clean, performant, and maintainable code following industry best practices. The skill is specifically designed for JavaScript development tasks, not general programming or other languages.

When to use it

  • Debugging existing JavaScript backend applications experiencing performance issues or errors.
  • Developing new JavaScript backend modules or services using modern ECMAScript features.
  • Refactoring legacy JavaScript codebases to improve maintainability and readability.
  • Implementing asynchronous operations and handling promises effectively in Node.js environments.
  • Working with the Node.js module system, including ESM imports and dynamic imports.

Key capabilities

  • Proficiency in modern ECMAScript (ES2024+) features like top-level await, optional chaining, private class fields, new array methods (findLast, at), and Object.hasOwn.
  • Expertise in Node.js development including the module system and file system operations.
  • Understanding of asynchronous programming patterns using Promise combinators and async iteration.
  • Ability to utilize AbortController for request cancellation.
  • Knowledge of package management within the npm ecosystem.

Example prompts

  • "Debug this JavaScript code snippet: [paste code here]"
  • "Write a Node.js function that fetches data from an API and handles potential errors."
  • "Refactor this legacy JavaScript code to use modern ES2024+ features for improved readability."
  • "How can I implement cancellation of a fetch request in Node.js?"

Tips & gotchas

  • This skill is specifically focused on JavaScript backend development; it won't be helpful for other programming languages or general software engineering tasks.
  • The skill assumes familiarity with basic JavaScript and Node.js concepts.