diff --git a/core/src/main/resources/META-INF/upgrade/README.md b/core/src/main/resources/META-INF/upgrade/README.md
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+Contains [Jackpot](https://netbeans.apache.org/jackpot/index.html)-based refactoring rules offered when plugins are open in NetBeans IDE.
+Could be [converted to a more general tool](https://github.com/openrewrite/rewrite-jenkins/issues/6).