Thanks for your interest in this project.
The Paho project has been created to provide scalable open-source implementations of open and standard messaging protocols aimed at new, existing, and emerging applications for Machine-to-Machine (M2M) and Internet of Things (IoT). Paho reflects the inherent physical and cost constraints of device connectivity. Its objectives include effective levels of decoupling between devices and applications, designed to keep markets open and encourage the rapid growth of scalable Web and Enterprise middleware and applications. Paho is being kicked off with MQTT publish/subscribe client implementations for use on embedded platforms, along with corresponding server support as determined by the community.
Information regarding source code management, builds, coding standards, and more.
Before your contribution can be accepted by the project, you need to create and electronically sign the Eclipse Foundation Contributor License Agreement (CLA).
The Go client is developed in Github, see their documentation on the process of forking and pull requests; https://help.github.com/categories/collaborating-on-projects-using-pull-requests/
Git commit messages should follow the style described here;
http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html
Contact the project developers via the project's "dev" list.
This project uses Github issues to track ongoing development and issues.
Be sure to search for existing bugs before you create another one. Remember that contributions are always welcome!