A data processing device, such as a monitoring agent, runs process code to process input data captured from a data source of a production environment, such as managed network devices. The process code can be created on or modified at a terminal of a development environment remote from the data processing device. The input data can be routed to the development environment to test the process code with actual data. The development environment can also provide test data to the process code to test edge cases and other situations. The output of the process code running in the development environment can be routed to the data processing device for output to downstream systems as if generated by the data processing device. Once the process code is operating satisfactorily at the development environment, the process code can be transmitted to the data processing device for execution in the production environment.