This guide describes workflows and best practices for developers. If you are a service developer, this includes information on how to write models and synchronizers for services being on-boarded into CORD. If you are a platform developer, you will find information about the platform services typically integrated into CORD (e.g., Kubernetes, OpenStack, VTN). Service developers may be interested in what's under the covers, but they should not need to understand these internals to develop individual services.