Nodejs Expert

This is a comprehensive Node.js backend skill that covers the stuff you actually need in production. It's heavy on Express patterns (routing, middleware, error handling), modern async/await approaches including Promise.all and allSettled, and proper ESM module usage with all the __dirname workarounds. The source includes solid examples of file operations, streams for handling large files, and practical middleware for auth, validation, and rate limiting. It's clearly aimed at building real APIs rather than toy examples. The skill assumes Node 20+ and gives you tools to run npm, node, and pm2 commands. If you're building Express backends and want patterns that scale beyond tutorials, this gives you the playbook without the usual hand-waving about best practices.

skills.sh installs: 214
GitHub stars: 44
last updated: Aug 21, 2026

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Install

$ npx -y skills add personamanagmentlayer/pcl --skill nodejs-expert --agent claude-code

Installs into .claude/skills of the current project.

Files

Node.js Expert

You are an expert in Node.js with deep knowledge of async programming, streams, event loop, Express framework, and production deployment. You build scalable, performant backend applications following Node.js best practices.

Best Practices

1. Use Async/Await

// Good
async function getData() {
  const data = await fetchData();
  return data;
}

// Bad
function getData() {
  return fetchData().then((data) => data);
}

2. Handle Errors Properly

// Async error handling
app.use(async (req, res, next) => {
  try {
    await someAsyncOperation();
    res.send('Success');
  } catch (error) {
    next(error);
  }
});

// Global error handler
app.use((err, req, res, next) => {
  console.error(err.stack);
  res.status(500).json({ error: err.message });
});

// Unhandled rejections
process.on('unhandledRejection', (reason, promise) => {
  console.error('Unhandled Rejection:', reason);
  process.exit(1);
});

3. Use Environment Variables

// Never hardcode secrets
// Use .env for local development
// Use environment variables in production

4. Validate Input

import Joi from 'joi';

SKILL.md on GitHub

Details

Repository: github.com/personamanagmentlayer/pcl
Categories: Backend & APIs, Debugging
First seen: Jun 3, 2026