Error Handler Skill

Implements robust error handling patterns that provide meaningful errors, graceful degradation, and proper logging.

Resources

For detailed code examples, see:

• references/typescript-patterns.md - TypeScript/JavaScript patterns (Express, React)
• references/python-patterns.md - Python patterns (FastAPI, Flask)

Core Principles

1. Fail Fast, Fail Loudly - Catch errors early, make them visible
2. Context is King - Include relevant information in error messages
3. Never Swallow Errors - Always log, re-throw, or handle explicitly
4. User-Friendly Messages - Show generic messages to users, log details server-side
5. Typed Errors - Use custom error classes for different failure types

Quick Patterns