Lessons learned from managing Kubernetes cluster resources in an open-source community in a transparent git-ops way. We will discuss the design patterns for Kubernetes resource management in cluster fleets in order to achieve uniformity, auditability, transparency, and effectiveness. In particular, we will talk about cluster policies, and effective repository structures promoting manifest reuse and collaboration through Kustomize. Kustomize is a first-party tool for manifest composition allowing cluster admins to create simple yet powerful and context-aware file structures for resources that require centralized management. This lightning talk aims to share our personal experience in Operate First Community Cloud in this regard.