japicmp

Compares two versions of a Java jar archive and reports binary and source compatibility changes.

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japicmp compares two versions of a Java jar archive and reports the differences, distinguishing binary-compatible from source-compatible changes and recommending the correct semantic-versioning bump. It's available as a command-line tool, Maven plugin, hosted online comparison for Maven Central artifacts, and an MCP server for AI coding assistants. It's aimed at Java library maintainers and release engineers who need to know exactly what changed, and how safely, between two releases.

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