Questions on Habitat - the implementation (https://github.com/Sitecore/Habitat/). For questions on the Helix guidelines themselves, use the helix tag.
Habitat is a real Sitecore project implemented on the Sitecore Experience Platform using Helix. It is an example that allows developers to see how Helix is applied and lets developers experience a project based on these principles. It also provides an excellent basis on which to develop additional modules and extend existing ones.
In addition, it saves the developer from having to create these modules from scratch. Throughout this document is a series of examples of how Habitat implements the described principles and conventions.