The Appverse Contributor Documentation is a comprehensive guide for developers and HPC administrators who want to add, maintain, or improve Open OnDemand app configurations in the Appverse catalog. It covers everything from repository requirements and metadata standards to the review process, sync behavior, and community support model. Contributors will find detailed guidance on structuring their repositories, writing effective READMEs, and tagging apps for discoverability. The documentation also outlines community governance, maintenance expectations, and where to turn for support — making it a one-stop reference for anyone looking to share their work with the broader HPC community.