1. A method for machine tool post processor development comprising: through operation of at least one processor in a data processing system: generating a machine tool post processor having a plurality of layers including a library level layer, a controller level layer, and at least one other layer, wherein the library level layer stores code to handle files and to interact with computer-aided-manufacturing (CAM) software, wherein the controller level layer stores code associated with machine controller functionality, wherein each layer is associated with at least one of a plurality of different access levels for at least one of a plurality licenses; interacting with a user in a dynamic user interface based on the machine tool post processor to modify the machine tool post processor, wherein the dynamic user interface provides access to read and write data to each respective layer based on a license associated with each user and the at least one access level associated with the corresponding license associated with each respective layer; and storing the modified machine tool post processor.