I built a Claude Code skill that scores your legacy Java code 1–100 and modernizes it to Java 21

📰 Dev.to · Santosh Ravi Teja Goteti

Learn how to modernize legacy Java code to Java 21 using a Claude Code skill, scoring code quality from 1-100

intermediate Published 21 May 2026
Action Steps
  1. Build a Claude Code skill to score legacy Java code
  2. Run the skill on your Java 8 codebase to get a quality score
  3. Configure the skill to modernize your code to Java 21
  4. Test the modernized code for compatibility and functionality
  5. Apply the modernization changes to your production codebase
  6. Compare the quality scores before and after modernization
Who Needs to Know This

Developers and engineering teams working on legacy Java codebases can benefit from this skill to improve code quality and modernize their projects

Key Insight

💡 Modernizing legacy Java code to Java 21 can significantly improve code quality and reduce technical debt

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🚀 Modernize your legacy Java code to Java 21 with a Claude Code skill! Score your code quality from 1-100 and improve it 🚀

Key Takeaways

Learn how to modernize legacy Java code to Java 21 using a Claude Code skill, scoring code quality from 1-100

Full Article

The problem with Java 8 → Java 21 migrations If you're working on a Java 8 codebase — or...
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