Spring HATEOAS for building hypermedia-driven RESTful APIs.
Covers EntityModel, CollectionModel, RepresentationModelAssembler, HAL, and affordances.
USE WHEN: user mentions "HATEOAS", "hypermedia", "HAL", "EntityModel",
"CollectionModel", "RepresentationModelAssembler", "Richardson Maturity Level 3"
DO NOT USE FOR: simple REST APIs without hypermedia - use plain Spring MVC,
GraphQL - use `spring-graphql` skill