spring-boot-3

When to Use

Load this skill when:

• Building a Spring Boot 3.3+ service or API
• Wiring beans with dependency injection
• Defining configuration properties and validation
• Implementing REST controllers and service layers

Critical Patterns

Pattern 1: Constructor injection only

Always use constructor injection; avoid field injection.

Pattern 2: Typed configuration properties

Use @ConfigurationProperties with validation, not scattered @Value.

Pattern 3: Transaction boundaries at service layer