Merge pull request #863 from bstansberry/rel39b

[Issue_861] Add a note about galleon plugin compatibility

Author: bstansberry

content/posts/2025-12-19-WildFly39Beta-released.adoc

@@ -21,6 +21,7 @@ Here's a quick rundown of the highlights:
 * **Jakarta RESTful Web Services**: A new attribute, `resteasy-original-webapplicationexception-behavior` has been https://docs.wildfly.org/wildfly-proposals/jaxrs/WFLY-14559-new-attributes.html[added to the `jaxrs` subsystem`]. It was previously only available by configuring the equivalent context parameter at a deployment level. Configuring this at the subsystem level will apply it to all deployments, unless the deployment itself explicitly sets the parameter.
 * **Java EE 11 Integration:** In WildFly Preview, we've  updated our implementations of Jakarta Authentication, Jakarta Concurrency, Jakarta Security, Jakarta Servlet,   and Jakarta Websockets.
 * **Galleon provisioning**: Our Galleon tooling has https://docs.wildfly.org/wildfly-proposals/provisioning/WFLY-21122-WildFly-Feature_pack-Family.html[added preview capabilities] that will make it possible for users who want to use a feature pack to choose which of a compatible set of dependency feature packs to use. There's no practical end-user benefit to this _yet_, but it will be helpful in the future as the feature packs we produce make use of this capability. A typical example will be letting users of something like the https://github.com/wildfly-extras/wildfly-ai-feature-pack[AI feature pack] choose which "base" feature pack that provides Jakarta EE to use -- `wildfly-ee`, `wildlfy-preview` or a planned `wildfly-ee-10`.
+** _Note_: If you plan to develop a feature pack that depends on WildFly 39 Beta, be sure to use WildFly Galleon Plugins 8.1.0.Beta4 or later. We always recommend you use the same Galleon plugin version that WildFly used to build its own feature packs.
 * **Component Upgrades:** We've updated a wide range of dependencies to their latest versions, improving performance, stability, and security. Notable upgrades include:
  ** **Jackson 2.20**
  ** **Infinispan 16.0**