I think it is a good idea to show warning to any other commands other than what is available.
For instance, if the user makes a typo mern inis instead of mern init as per now there is no message being shown.
A warning might be suitable here such as unknown command inis
For instance, if the user makes a typo
mern inis
instead ofmern init
as per now there is no message being shown. A warning might be suitable here such asunknown command inis