Worked on the kubernetes/kubernetes repository to refactor the Kubelet Device Resource Health Management system, focusing on improving the clarity, reliability, and maintainability of health status reporting and device resource allocation logic. Applied Go and backend development skills to restructure the kubelet/dra module, introducing comprehensive unit and integration tests that expanded coverage for health helpers and resource management. This approach enhanced the robustness of runtime decision-making for node resources and reduced the risk of future changes. The work aligned with Kubernetes best practices, resulting in clearer health telemetry and enabling faster diagnosis without addressing major bugs during the development period.