Ethan Holz modernized the CI workflow runner management for the OpenFreeEnergy/openfe repository, focusing on improving reliability and scalability in continuous integration pipelines. He replaced the existing gha-runner action with explicit start and stop actions for AWS-based GPU and CPU runners, ensuring more precise control over runner lifecycles. This update preserved the core functionality of CI runner management while streamlining the underlying infrastructure. Ethan utilized YAML for workflow configuration and leveraged his expertise in CI/CD and cloud infrastructure to reduce operational ambiguity. The work demonstrated a focused approach to infrastructure modernization, addressing both stability and efficiency within the project’s CI environment.