Global Validation

Implement comprehensive validation with server-side checks, early failure, specific error messages, and input sanitization to prevent injection attacks. Use this skill when implementing form validation, API request validation, data type checking, input sanitization, or validation logic at any application layer. Use when working with validation libraries, schema validators, or implementing custom validation rules for user input, API payloads, or business logic. Use when writing validation code in backend APIs, frontend forms, or data processing pipelines.