Interactivity & Parent-Child Commands

I want to build a command line where the user should be able to run a parent command like 1. And the commands 2 and 3 should also have access to argument values of command 1.
1. GetAnimal -Name "a" -Age "b"
2. GetDog -Breed "c"
3. GetCat -Color "d"

I was wondering if _commandline_ supports interactivity (users should be able to run multiple child commands after running the parent command until they exit), and parent-child structure described above.

The issue provides no file, test, or entry point; start by reviewing the command-line parser's existing command and argument model. Compare it with the GetAnimal, GetDog, and GetCat examples, then determine whether interactive parent-child execution is supported and what behavior would define completion.

Written by the indexing model from the issue text.