Node.js Skill

When to Use

• Building backend services or APIs
• Writing CLI tools or scripts
• Managing async I/O and processes

Critical Patterns

• Use async/await for I/O
• Environment variable management
• Graceful shutdown and error handling

Decision Tree

• HTTP server? → Use built-in http or framework
• CLI tool? → Use process.argv and commander/yargs
• Long-running process? → Use process signals

Edge Cases

• Unhandled promise rejections
• Memory leaks in long-running apps
• Child process management