With wildfly 9 we split code to wildfly and wildfly-core.
Protocol jar you are talking about is part of wildfly core and as such has version of the core and not of full app server.

If you look at maven coordinates you will see that protocol jar in 9+ has groupid org.wildfly.core instead of org.wildfly it had in older versions.

Tomaz

Sent from my Phone

From: Rob Stryker
Sent: ‎6.‎6.‎2015 6:38
To: wildfly-dev@lists.jboss.org
Subject: [wildfly-dev] Question on version of wildfly-protocol jars

Hey all:

Here's a table of wf releases and what protocol jar version it has. I was just curious if there was a discussion on this, and going backwards in version was intentional? Is there anyone (customers, clients, etc) out there likely to be confused by this? Or are we just considering it internal details and not relevant?

Wildfly Release	wildfly-protocol jar version
8.0	wildfly-protocol-8.0.0.Final.jar
8.1	wildfly-protocol-8.1.0.Final.jar
9.0.CR1	wildfly-protocol-1.0.0.CR1.jar
EAP7 DR3	wildfly-protocol-2.0.0.Alpha3.jar