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We are also actively engaged in reviewing a lot of older issues and finding small items to close out (fixed or not) before tackling some bigger work. We have also been working to fix issues with the project javadocs caused by a range of bugs in Java, javadoc, and the Maven javadoc plugin. The javadoc search feature works again and most of the expected links between projects and dependencies are working again, with the exception of the Java EE APIs.
Most of the summer will probably be taken up by further work on advanced authentication features, designing a plugin installation and upgrade architecture, and adapting the OIDC extension into its final form. Some of this work will probably ship ahead of V5, but the bulk of it will be targeted for that release next year.