Global Validation

# 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.

## When to use this skill

- When handling user input from forms, API endpoints, or external data sources
- When implementing form validation with field-specific error messages
- When validating data types, formats (email, phone, URL), ranges, and required fields
- When sanitizing user input to prevent injection attacks (SQL, XSS, command injection)
- When implementing client-side validation for immediate user feedback
- When implementing mandatory server-side validation for security and data integrity
- When validating business rules (sufficient balance, valid date ranges, stock availability)
- When using allowlists to define what input is acceptable rather than blocklists
- When applying validation consistently across all entry points (web, API, background jobs)
- When failing early by rejecting invalid data before processing

## Instructions

For details, refer to the information provided in this file:
[global validation](../../../agent-os/standards/global/validation.md)