Strengthens and speeds up JVM API test suites - assertions so loose that an empty `200 OK` passed for three days, a 220-test suite spending fourteen minutes mostly waiting on sequential HTTP calls, or endpoints exercised through a hand-rolled JDK HTTP client with JSON parsed by hand. Authors REST Assured (Java) tests in the given().when().then() BDD-style DSL: status code and JSON / XML path assertions, authentication (Basic, OAuth2, API key), Maven / Gradle dependencies, JUnit 5 execution, and Surefire / JaCoCo reports for CI gating. Use when the project is on the JVM and its API tests miss real assertions, run too slowly, or are written by hand.