We can chain commands pretty simply, say you want to make an app streamer that has a sub command read and an sub-command of that called csv and json. You can use the cobra init to generate these separate ones,
cobra add csv
cobra add json
cobra add read
Then go into the source file and hook up csv and json with the proper parent, in this case, readCmd.
So we change from
RootCmd.AddCommand => readCmd.AddCommand
This allows us to easily create a large tree.