Java Migration

by decebals

Java Migration is a DevOps skill for Claude Code, published by decebals in claude-code-java.

714 stars142 forkson decebals/claude-code-javaAdded 2026/08/23+1% in starsRepository updated 2026/02/08

View source on GitHub Download repo ZIP

ai-assisted-developmentclaude-codeclaude-code-skillsdeveloper-toolsjava

Install in seconds

Install Java Migration

Copy Java Migration into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/decebals/claude-code-java/tree/main/.claude/skills/java-migration ~/.claude/skills/java-migration

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/decebals/claude-code-java.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: .claude/skills/java-migration/SKILL.md in decebals/claude-code-java
Installs to: ~/.claude/skills/java-migration
Collection: One of 18 skills cataloged from this repository
Category: DevOps — 798 skills

What Java Migration does

Java Migration guides upgrading Java projects between major versions such as 8, 11, 17, 21, and 25. Use it when modernizing legacy code, changing build targets, or fixing API and module-system breakages.

Java Migration is cataloged under DevOps on DirSkills. Java Migration comes from a repository tagged ai-assisted-development, claude-code, claude-code-skills, developer-tools and java.

Documentation

README

Excerpt

Java Migration Skill

Step-by-step guide for upgrading Java projects between major versions.

When to Use

User says "upgrade to Java 25" / "migrate from Java 8" / "update Java version"
Modernizing legacy projects
Spring Boot 2.x → 3.x → 4.x migration
Preparing for LTS version adoption

Migration Paths

Java 8 (LTS) → Java 11 (LTS) → Java 17 (LTS) → Java 21 (LTS) → Java 25 (LTS)
     │              │               │              │               │
     └──────────────┴───────────────┴──────────────┴───────────────┘
                         Always migrate LTS → LTS

Quick Reference: What Breaks

This is the opening of the README. Read the full README on GitHub.

Frequently asked about Java Migration

What else does decebals publish alongside Java Migration?
Java Migration is one of 18 skills that DirSkills catalogs from decebals/claude-code-java, the repository it ships in. Its siblings there include API Contract Review, Architecture Review and Changelog Generator. Each one is a separate skill with its own page in this directory, installs the same way Java Migration does, and is maintained by decebals in that same repository. The rest of the collection is listed on the decebals/claude-code-java page.
How does Java Migration compare to other DevOps skills?
Java Migration ranks #577 by stars among the 798 DevOps skills in this catalog. The most-starred ones next to it are Backend Patterns, API Connector Builder and Migration. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Java Migration against them. Open each page to compare what they document and how they install.