Dear Kafka, Migrating command tools from core module to tools module is not news. However, I want to make sure I don't misunderstand the BC rules.
The question is "Should we keep origin class?" FeatureCommand ( https://github.com/apache/kafka/blob/trunk/core/src/main/scala/kafka/admin/FeatureCommand.scala) is a good example. We keep the origin class file due to backward compatibility. However, we don't do that to other tools. It seems to me that we should align the BC rules for all tools. And here is my two cents: the expected way of using command tool is by script file, so we DON'T need to keep origin class file. WDYT? Best, Chia-Ping
