Prompt

Design comprehensive form validation system.

<form_complexity>
{types and complexity of forms}
</form_complexity>

<validation_needs>
{client and server validation rules}
</validation_needs>

<ux_requirements>
{error display and user guidance}
</ux_requirements>

Design:
1. Validation schema
2. Real-time validation
3. Error messaging
4. Accessibility
5. Server coordination
6. Testing strategy