ccfg-java

Autonomously improve Java test coverage using JaCoCo analysis

Initialize a new Java project with Maven/Gradle, JUnit 5, Spotless, and quality plugins

Run compile, format check, tests, lint, and static analysis for Java projects

Use this agent when designing or implementing modern Java 21+ applications with advanced language features, clean architecture, or domain-driven design. Invoke for records, sealed classes, pattern matching, virtual threads, JPMS modules, structured concurrency, or hexagonal architecture layouts. Examples: designing a domain model with sealed hierarchies, migrating to virtual threads, setting up a modular JPMS project, implementing clean architecture layers, or refactoring to use records.

Use this agent when writing or improving JVM test suites using JUnit 5, Mockito, AssertJ, Testcontainers, or Spring Boot test slices. Invoke for parameterized tests, nested test classes, mocking strategies, fluent assertions, architecture tests with ArchUnit, or integration test setup. Examples: writing parameterized tests with @CsvSource/@MethodSource, setting up Testcontainers for PostgreSQL, configuring Spring @WebMvcTest slices, writing custom AssertJ assertions, or verifying architecture rules with ArchUnit.

Use this agent when writing Kotlin code including coroutines, Flow, Kotlin Multiplatform (KMP), DSL design, or Kotlin/Spring Boot integration. Invoke for suspend functions, structured concurrency, Flow operators, DSL builders, Ktor applications, data/sealed classes, or idiomatic Kotlin patterns. Examples: designing a coroutine-based service, building a type-safe DSL, migrating Java to Kotlin, setting up Kotlin Multiplatform shared modules, or writing Ktor HTTP endpoints.

Use this agent when configuring Gradle or Maven build systems for JVM projects. Invoke for build.gradle.kts setup, pom.xml configuration, multi-module project structures, dependency management with BOMs and version catalogs, plugin configuration (Spotless, JaCoCo, SpotBugs), or build performance optimization. Examples: setting up a Gradle multi-module project, configuring Maven dependency management, creating convention plugins in buildSrc, publishing to Maven Central, or optimizing Gradle build cache performance.

Use this agent when building Spring Boot 3+ applications including REST APIs, reactive services, security configurations, or cloud-native microservices. Invoke for Spring Data JPA/R2DBC, Spring Security with OAuth2/JWT, WebFlux reactive programming, Spring Cloud integration, actuator setup, or Micrometer observability. Examples: building a REST API with validation, configuring OAuth2 resource server, setting up Spring Cloud Gateway, writing Testcontainers integration tests.

This skill should be used when creating or editing pom.xml, build.gradle.kts, managing Java dependencies, configuring Maven/Gradle plugins, or organizing multi-module projects.

This skill should be used when working on Java or Kotlin projects, writing Java code, configuring Spring Boot, or reviewing Java code.

This skill should be used when writing Java tests, creating JUnit 5 test fixtures, using Mockito, testing Spring Boot applications, or improving test coverage.