Global Error Handling

Implement robust error handling with user-friendly messages, fail-fast validation, specific exception types, and graceful degradation strategies. Use this skill when writing error handling logic, exception handling code, input validation, or defensive programming patterns in any part of the application. Apply when working with try-catch blocks, error boundaries, exception handlers, API error responses, validation logic, or any code that needs to handle failure scenarios. Use when implementing user-facing error messages that don't expose technical details, validating input early with clear error messages, using specific exception types for targeted handling, centralizing error handling at application boundaries, or implementing retry strategies for transient failures. Apply when ensuring resources are properly cleaned up in error scenarios, designing graceful degradation for non-critical service failures, or implementing fail-fast patterns with explicit error messages.