name: global-validation description: Implement comprehensive input validation at all system boundaries with server-side security and client-side UX. Use this skill when validating user input, implementing form validation, sanitizing data to prevent injection attacks, checking data types and formats, providing field-specific error messages, or applying business rule validation. Applies to API endpoints, form handlers, data processing code, and any code that accepts external input.

When to use this skill

• When validating user input on the server side
• When implementing client-side form validation for UX
• When failing early on invalid data
• When providing clear, field-specific error messages
• When using allowlists over blocklists for validation
• When checking data types, formats, and required fields
• When sanitizing input to prevent SQL injection and XSS
• When validating business rules (dates, balances, permissions)
• When applying consistent validation across all entry points
• When working on API endpoints, forms, or data import features
• Applies to controllers, services, and data processing code

Global Validation

This Skill provides Claude Code with specific guidance on how to adhere to coding standards as they relate to how it should handle global validation.

Instructions

For details, refer to the information provided in this file: global validation