In the evolving world of cloud-native technologies, managing multi-vendor systems with varied configuration models presents unique challenges. While OpenAPI remains widely recognized, YANG is gaining traction for its vital role in network management. This session introduces an innovative solution that integrates YANG with the Kubernetes API, enabling seamless interaction and operational efficiency at scale. We will explore the challenges of aligning YANG-based schema systems with Kubernetes and share solutions that enhance GitOps workflows and automate large-scale system management. Through a real-world demonstration focused on large-scale 5G core operations, we will showcase how this integration simplifies the orchestration of complex, multi-vendor environments, unlocking new levels of agility and scalability.