Julian Cook contributed to the fihristorg/fihrist-mss repository by focusing on internal QA and data integrity improvements over a two-month period. He validated the Github client testing workflow in Oxygen, using Python and Git to implement and revert neutral code-comment edits, ensuring the stability of the CI pipeline without introducing user-facing changes. In April, Julian addressed a data disambiguation issue in the BL IO Islamic dataset by updating a person key identifier, preventing misrouting and preserving downstream mappings. His work demonstrated careful attention to repository stability, test documentation, and the maintenance of accurate data relationships within the project.