Hi Tom.
It depends, what option you choose in Kinetis Expert.
If you want to work with Shell, you must choose MQX option

after that you will see under middleware rtcs folder:

You can find Shell example under <KSDK1.3_path>\middleware\tcpip\rtcs\examples\shell
The Readme to RTCS Shell Application you will find in the same folder.
Documentation for the Shell - MQX RTOS RTCS User's Guide (IPv4 and IPv6) you will find at <KSDK1.3_path>\doc\tcpip\mqx_rtcs
I hope this helps you.
In case of any issue, please let me know.
Iva