# Java Rules

For Java or JVM work, open only the topic rules relevant to the task. Follow the project's target Java release and conventions, and load applicable shared security rules as well.

| Topic | Codex rule | Claude skill |
| --- | --- | --- |
| Modern Java and coding style | `references/modern-java.md` | `rules-java-modern-java` |
| Performance | `references/performance.md` | `rules-java-performance` |