Markus Fensterer developed CI/CD Base Image Version Support for the metal-stack/mini-lab repository, focusing on updating the base-image.yaml configuration and GitHub Actions workflows to support the 202505 base image version. By leveraging YAML and CI/CD pipeline expertise, Markus enabled builds to reliably target the latest base image, which improved continuous integration reliability and accelerated release readiness. The work involved precise configuration management and traceable change history, ensuring that the CI process remained up to date with evolving infrastructure requirements. While the scope was focused on a single feature, the implementation demonstrated depth in automation and workflow optimization using GitHub Actions.