Quarkus Validation Guidelines

Apply Quarkus validation best practices at REST boundaries.

What is covered in this Skill?

• Bean Validation annotations on DTOs and command models
• @Valid and boundary validation in Jakarta REST resources
• Validation groups and custom constraints
• Validation error mapping for client-safe responses
• Consistent handling of invalid inputs across endpoints

Scope: Apply recommendations based on the reference rules and good/bad examples.

Constraints

Before applying validation changes, ensure the project compiles. After improvements, run full verification.