Frank Kreuwel focused on improving metadata accuracy and citation attribution in the OpenSTEF/openstef repository. He addressed a bug in the CITATION.cff file by correcting YAML formatting and updating the author list to align with DOI-based standards, ensuring that citations are properly structured and attributed. His work involved configuration management and documentation skills, with a strong emphasis on maintaining consistency with CITATION file standards. By resolving this issue, Frank reduced the risk of misattribution for downstream users and enhanced the overall integrity of the repository’s metadata. The depth of his contribution reflects careful attention to detail in YAML configuration.