feat(cmd): add CmdCommand for Unix-friendly automation and fix serialization

src/mcp_cli/commands/__init__.py

@@ -109,6 +109,7 @@ def register_all_commands() -> None:
     from mcp_cli.commands.apps import AppsCommand
     from mcp_cli.commands.memory import MemoryCommand
     from mcp_cli.commands.plan import PlanCommand
+    from mcp_cli.commands.cmd import CmdCommand
     from mcp_cli.commands.attach import AttachCommand
 
     # Register basic commands
@@ -161,6 +162,8 @@ def register_all_commands() -> None:
     # Register plan command
     registry.register(PlanCommand())
 
+    # Register cmd command (CLI-only)
+    registry.register(CmdCommand())
     # Register attach command (multi-modal file staging)
     registry.register(AttachCommand())
 

src/mcp_cli/commands/cmd/__init__.py

@@ -0,0 +1,5 @@
+"""Command mode command."""
+
+from mcp_cli.commands.cmd.cmd import CmdCommand
+
+__all__ = ["CmdCommand"]