Micronaut Validation Guidelines

Apply Micronaut validation best practices at HTTP API boundaries.

What is covered in this Skill?

• Bean Validation annotations on DTOs and command models
• @Valid / @Validated usage in Micronaut controllers
• Validation groups and custom validators
• Consistent mapping of validation failures to 400 responses
• Safe and predictable validation error payloads

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.