Global Error Handling

Implement robust error handling with user-friendly messages, specific exception types, centralized error handling, and graceful degradation strategies across the application. Use this skill when writing error handling logic in any code file, implementing try-catch blocks, raising or throwing exceptions, or designing error response formats. Use this skill when validating input and failing fast with clear messages, implementing retry strategies for transient failures, ensuring proper resource cleanup in finally blocks, or creating centralized error handling middleware. Use this skill when working with API endpoints, service layers, data access code, or any code that could fail and needs proper error handling. Use this skill when designing error responses for users or implementing graceful fallback behaviors.