Configures Cucumber for BDD scenarios - Cucumber-JVM (Java/Kotlin via JUnit 5), Cucumber-JS (Node), Cucumber-Ruby. Authors `.feature` files in Gherkin, writes step definitions in the host language, runs via the framework's runner, integrates with JUnit XML reporting. Use when the user mentions Cucumber, Gherkin, `.feature` files, or behavior-driven (BDD) tests in Java, Kotlin, JavaScript, or Ruby, as the canonical wrapper for any of the three official implementations.