Gregory Roberts focused on repository hygiene in the flexcompute/tidy3d-notebooks project by implementing a targeted cleanup of obsolete optimization result files. He removed outdated .pkl artifacts from autograd notebooks, addressing repository clutter and reducing confusion for users during experimentation and onboarding. Using Python and Git, Gregory ensured that the cleanup did not alter notebook execution logic, maintaining the integrity of existing workflows. His work emphasized artifact management and data governance, supporting reproducibility without introducing new features or bug fixes. The depth of the contribution lay in its precision and its impact on code health, rather than in broad technical complexity.