Feature Request

To avoid redundant code, add a template mechanism for argument blocks that appear in multiple commands. Using the with_argparse decorator this is easy by reusing a function that modifies a parser; with_annotated currently has no simple equivalent.

Possible solutions

• Use a TypedDict + Unpack to reuse a named block of annotations:

class ArgumentBlock(TypedDict):
    # define reusable keys/values here
    ...

class App(Cmd):

    @with_annotated
    def do_a(..., **kwargs: Unpack[ArgumentBlock]) -> None:
        ...

    @with_annotated
    def do_b(..., **kwargs: Unpack[ArgumentBlock]) -> None:
        ...

• Allow attaching a predefined parser to the parser generated by with_annotated, and expose the resulting namespace inside the decorated method for easy access.

Both approaches reduce duplication; the second may be simpler to implement.