Ondrej focused on enhancing metrics observability and security across CAST AI’s Kubernetes components during November 2025. In the castai/k8s-agent repository, he developed a CustomMetricsExporterConfig CRD with a conditional informer, enabling advanced metrics management and retrieval within Kubernetes clusters. He supported this with robust tests and new data structures, ensuring reliability and maintainability. In castai/helm-charts, Ondrej introduced role-based access control for the custom metrics exporter, refining access permissions and upgrading the agent version for compatibility. Working primarily with Go, YAML, and Helm, he improved deployment reliability and security posture, delivering two well-integrated features without introducing critical defects or regressions.