During June 2025, Jeroen Fournier focused on enhancing the reliability and maintainability of the actions/actions-runner-controller repository. He addressed a key issue in autoscaling listener management by implementing automatic cleanup of listener secrets upon pod deletion, ensuring that stale configuration data does not persist and that pod recreation starts from a clean state. This work involved updating and expanding test coverage to validate the new secret cleanup behavior, reinforcing the stability of autoscaling workflows. Leveraging his expertise in Go, Kubernetes, and controller development, Jeroen prioritized code quality and deployment reliability, delivering a well-tested solution that reduces configuration drift and operational risk.