Error Handling Patterns

Core Principles

1. Fail fast - Detect and report errors early
2. Fail safely - Errors shouldn't crash the application
3. Fail informatively - Provide actionable error messages
4. Recover gracefully - Handle expected failures

Custom Error Classes

// Base application error
export class AppError extends Error {
  constructor(
    message: string,
    public readonly code: string,
    public readonly statusCode: number = 500,
    public readonly details?: unknown