Nicholas Hoernle developed a YAML export option for the DS4SD/docling command line interface, expanding the tool’s supported export formats and enabling YAML-based document workflows. He implemented this feature by updating the export handling logic and extending the output format enumeration, ensuring that YAML integration did not disrupt existing functionality. Working primarily in Python, Nicholas applied his skills in CLI development and enum usage to maintain backward compatibility while enhancing automation and interoperability with downstream systems. The work focused on a single, well-scoped feature, demonstrating depth in targeted CLI enhancements and careful attention to preserving the stability of the repository.