dsl-devkit

Migrates Xtend (.xtend) source files to idiomatic Java 21 using a repeatable slice-based process. Use this skill whenever the user wants to convert Xtend files to Java, port a group of Xtend files, work through the xtend-to-java migration checklist, clean up PMD/Checkstyle violations in migrated files, or verify that a migrated Java file faithfully preserves the behavior of its Xtend original. Also triggers for phrases like "convert this xtend", "migrate these files", "port to java", or "xtend migration".