During a one-month engagement, Josh Shernicoff focused on repository hygiene for the astro-datalab/notebooks-latest project by updating ignore rules for test artifacts. He added the 'text16' entry to the test_ignore.txt configuration file, ensuring that specific test artifacts are excluded from tracking and processing within the repository. This targeted change, managed through disciplined Git workflows and text-based configuration, reduced noise in continuous integration pipelines and improved both build speed and storage efficiency. While the scope was limited to a single feature and did not involve bug fixes, the work demonstrated careful attention to process optimization and artifact governance in collaborative environments.