Java Development

Use when writing, refactoring, or reviewing any Java or JVM code: plain Java, libraries, CLI tools, Android Java, Maven/Gradle dependency and build governance (pom.xml, BOMs, version catalogs, toolchains), Spring Boot development and version migration (2.x to 3.x, 3.x to 4.x, javax to jakarta), MyBatis/MyBatis-Plus or JPA/Hibernate persistence, writing tests with JUnit 5, Mockito, AssertJ, and Testcontainers, API design, exception handling, security review, Java upgrades, and JVM troubleshooting such as OOM, high CPU, GC tuning, GC logs, thread dumps, deadlocks, and memory leaks. Also covers J

8 stars 1 forksSoftware Development

Install

skills CLI (Claude Code, Cursor, Codex and more)

npx skills add zander-zyx/java-development-skill --skill java-development

Manual install

git clone --depth 1 https://github.com/zander-zyx/java-development-skill.git /tmp/java-development-skill
mkdir -p ~/.claude/skills
cp -r /tmp/java-development-skill/. ~/.claude/skills/java-development

Personal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.

From the SKILL.md

# Java Development Agent

Router skill for general Java/JVM work. Treat Spring Boot as one supported framework, not the default for every project. Load only the matching rule files below.

## Routing Protocol

Run these three steps in order before generating or modifying code.

### Step 1 — Stack Detection

Inspect the project's build descriptor(s) first and record what they prove:

- `pom.xml` vs `build.gradle(.kts)` → Maven or Gradle; preserve whichever exists.
- Java version → `maven.compiler.release` / `<java.version>` / Gradle toolchain or `sourceCompatibility`.
- Spring Boot line → parent or BOM version: 2.x, 3.x, or 4.x (drives jakarta namespace, security DSL, Actuator/Micrometer config).
- Persistence → JPA/Hibernate vs MyBatis/MyBatis-Plus vs JDBC/jOOQ (dependencies plus repository/mapper layout).
- Lombok → present and annotation processing configured, or absent.
- Logging facade → SLF4J, Log4j2, or JUL in actual use.
- Test stack → JUnit 4 vs 5, Mockito, Testcontainers, Spring Boot test slices.

Existing evidence beats this skill's defaults. If a descriptor answers a question, do not assume otherwise.

### Step 2 — Lazy Routing (Progressive Disclosure)

Classify the task, then read **only the 1–3 highest-matching rule files** from the route table. Never load every rule file for one task — it inflates the context window without improving the answer.

Read the full skill on GitHub

Details

Skill name: java-development
Repository: zander-zyx/java-development-skill
License: MIT
Repo updated: 30 October 2026

FAQ

What does the Java Development skill do?

How do I install the Java Development skill?

skills CLI (Claude Code, Cursor, Codex and more): npx skills add zander-zyx/java-development-skill --skill java-development. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.

Is Java Development popular?

It lives in zander-zyx/java-development-skill, which has 8 GitHub stars and 1 forks.

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