Jemma Singleton developed a structured data-entry enhancement for the NclRSE-Training/countries repository, focusing on the addition of JemmasRegion with detailed fields for population, type, and historical existence. She approached the task by designing an initial data model and populating it with relevant information, using text-based documentation and data entry skills to ensure accuracy and traceability. Her work included updating the rationale for JemmasRegion’s existence, supporting improved data governance and downstream analytics. Over the course of one month, Jemma’s contribution established a foundation for future reporting and analysis, though the scope was limited to a single feature without bug fixes.