test/resource/custom-cluster/matter-custom2.xml

<?xml version="1.0"?>
<!--
Copyright (c) 2023 Project CHIP Authors

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
  
<configurator>
<domain name="CHIP"/>  

  <!-- Use the cluster extension Extend the on/off cluster -->
<clusterExtension code="0x0006">
    <attribute side="server" code="0xFFF20000" define="SAMPLE_MFG_SPECIFIC_TRANSITION_TIME_6" type="INT8U" min="0x0000" max="0xFFFF" writable="true" default="0x0000" optional="true">Sample Mfg Specific Attribute 6</attribute>
    <attribute side="server" code="0xFFF20001" define="SAMPLE_MFG_SPECIFIC_TRANSITION_TIME_8" type="INT16U" min="0x0000" max="0xFFFF" writable="true" default="0x0000" optional="true">Sample Mfg Specific Attribute 8</attribute>
    <command source="client" code="0xFFF200" name="SampleMfgSpecificOnWithTransition2" optional="true">
        <description>Client command that turns the device on with a transition given
        by the transition time in the Ember Sample transition time attribute.</description>
    </command>
    <command source="client" code="0xFFF201" name="SampleMfgSpecificToggleWithTransition2" optional="true">
        <description>Client command that toggles the device with a transition given
        by the transition time in the Ember Sample transition time attribute.</description>
    </command>
</clusterExtension>

</configurator>