diff --git a/src/python/jw/pkg/lib/Cmd.py b/src/python/jw/pkg/lib/Cmd.py
index a5cdf489..ccdbf44b 100644
--- a/src/python/jw/pkg/lib/Cmd.py
+++ b/src/python/jw/pkg/lib/Cmd.py
@@ -21,8 +21,10 @@ class Cmd(abc.ABC): # export
         self.__children: list[Cmd] = []
         self.__child_classes: list[type[Cmd]] = []
 
-    async def _run(self, args):
-        pass
+    @abc.abstractmethod
+    async def _run(self, args) -> None:
+        if isinstance(self.__parent, Cmd): # Calling App.run() would loop
+            return await self.__parent._run(args)
 
     def set_parent(self, parent: Any|Cmd):
         self.__parent = parent
@@ -67,10 +69,6 @@ class Cmd(abc.ABC): # export
     async def run(self, args):
         return await self._run(args)
 
-    @abc.abstractmethod
-    async def _run(self, args):
-        pass
-
     def add_subcommands(self, cmds: Cmd|list[Cmds]|Types|list[Types]) -> None:
         if isinstance(cmds, Cmd):
             assert False