apps/foo/src/main/resources/OSGI-INF/blueprint/shell-config.xml

<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0">

    <command-bundle xmlns="http://karaf.apache.org/xmlns/shell/v1.1.0">
        <command>
            <action class="org.onlab.onos.foo.TestIOClientCommand"/>
        </command>
        <command>
            <action class="org.onlab.onos.foo.TestIOServerCommand"/>
        </command>
    </command-bundle>

</blueprint>