spring-boot-idioms

Spring Boot Idioms and Patterns

Spring Boot (3.x) rewards auto-configuration, constructor injection, and actuator-driven observability. Idiomatic Spring = annotation-driven, testable, production-ready.

Scope: Spring Boot-specific patterns. For Java: @.agents/skills/java-idioms/SKILL.md.

Dependency Injection

1. Constructor injection only — never field injection:

   @Service
   public class TaskService {
       private final TaskRepository repository;
       private final TaskMapper mapper;