Haoyu Xia worked on the cilium/cilium repository, focusing on backend development and Kubernetes integration using Go. During the month, Haoyu migrated the heartbeat health check from the deprecated Kubernetes healthz endpoint to the newer readyz endpoint, ensuring ongoing compatibility with recent Kubernetes versions. This update preserved the existing health monitoring semantics while minimizing regression risk. Haoyu also updated the associated tests to validate the new readyz-based health check, maintaining reliability across Kubernetes upgrades. The work demonstrated a careful approach to API integration and system maintenance, addressing a single but impactful bug fix that improved long-term stability for Kubernetes deployments.