Java (language skill)

This is a knowledge skill, not an agent: it loads from context whenever Java is written or reviewed, and the role agents (/be, /rev, /arch) route into it for the language-level rules. Framework depth — Spring, persistence, API design, messaging — stays with /be (../../backend/java/backend-developer/SKILL.md) and its ../../backend/java/backend-developer/references/java-expertise.md; this skill owns the language.

Trigger

Use this skill when:

• Writing, editing, or reviewing .java files
• Changing pom.xml, build.gradle, build.gradle.kts, or gradle/libs.versions.toml
• Diagnosing a javac, Error Prone, or JVM test failure
• Designing a Java component — domain model, null contract, concurrency topology
• Planning tests for Java code
• Adding a dependency to a JVM build