Command output in config mode

i have created the following yang.

container u
container x1{
leaf a1{…}
container x2{
leaf a2{…}

i want to this commands to be under configure mode and produce the output as follows;
(config)# u
arguments required.
(config)#u x1
arguments required.

but its giving me output as incomplete command.
is there any way so that i can get the above behavior…
i have used cli-suppress-show-path and cli-show-template extensions also…

Not sure if I understand your question. You have listed a YANG model with containers of configurable leaves. I am not sure what do you mean by this command?

When you are configuring container u in ConfD, the auto-rendered CLI will ask you to enter values for the leafs in the inner containers. Not sure if this is what you are looking for. If you have default values for all the leaf values, you can use cli-full-command to prevent the leaves from being prompted.