Welcome to the ONOS Developer Guide! Here you will find information useful for developing on ONOS, contributing to ONOS itself, and the tools and procedures involved in the ONOS development process. This guide also describes how to contribute to the ONOS Guides; to do so, please refer to Contributing to ONOS Documentation.
The Developer Quick Start should be enough to get you started. If you like more detailed instructions for importing the ONOS project into an IDE or contributing your changes back to the ONOS project, please see the resources below.