Javascript Pro

Name: Javascript Pro
Author: jeffallan

Checked

jeffallan·vlatest·backend·MIT

Generates, debugs, and optimizes complex Node.js/JavaScript backend code, including APIs and serverless functions.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

Run this in your project

terminal

$ npx skills add jeffallan/claude-skills --skill javascript-pro -a claude-code

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

jeffallan

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 12 Oct 2026

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 jeffallan/claude-skills at 1be15d8064.
The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit: 1be15d8064
Manifest: skills/javascript-pro/SKILL.md
Scanned: 6 files, 1,867 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

The JavaScript-Pro skill enables AI agents to write, debug, and optimize complex JavaScript code. It supports advanced features like asynchronous programming, DOM manipulation, and integration with backend systems using Node.js.

When to use it

Building dynamic web applications that require real-time updates
Creating APIs or microservices using Node.js
Debugging and optimizing performance-critical JavaScript code

Key capabilities

Writing modern JavaScript (ES6+)
Handling asynchronous operations with Promises and async/await
Working with the DOM for front-end interactivity
Integrating with backend systems via Node.js

Example prompts

"Write a function to fetch data from an API and display it on a webpage."
"Debug this JavaScript code that's causing a memory leak in my app."
"Optimize this Node.js server to handle 10,000 concurrent requests efficiently."

Tips & gotchas

Ensure your environment supports modern JavaScript features if using ES6+ syntax.
Be mindful of browser compatibility when working with DOM manipulation or advanced APIs.