In September 2025, Jjou contributed to the IGVF-DACC/igvfd repository by developing a barcode-to-donor mapping schema that enhances data linkage and supports more accurate downstream analytics. Jjou’s work involved defining a new mapping enum within the schema and updating Markdown-based documentation to ensure the new data type is clearly described for future users. Additionally, Jjou addressed a bug related to insert operations, improving data integrity and reliability across the pipeline. The work demonstrated proficiency in schema definition and documentation practices, with a focus on data modeling and disciplined version control. The contributions were targeted, well-scoped, and addressed core data quality needs.