Weird, we've added JarExtensionProvider (JEP) for exactly this reason. We usually have parser deployers that implement this interface. e.g. BeanDeployer --> -beans.xml + JEP .beans (old extension) I'll have a look, although I remember adding test for it. btw: no need for install, as JEP is contextually injected via callbacks into JARStructure ;-) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4193200#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...