Colin Stefani updated the heig-vd-dai-course repository to improve the accuracy of class enrollment records by adding a new feature to the project’s documentation. He focused on updating the README.md file to include a new student in the Class A roster, ensuring that onboarding information remained current and reducing confusion for both instructors and students. Colin used Markdown for clear, structured documentation and managed changes through Git-based version control, demonstrating careful attention to lightweight change management. While the scope of work was limited to a single documentation update, the contribution enhanced maintainability and visibility of class records for all repository users.