Mark Neo expanded the UI visual assets for the nus-cs2113-AY2425S2/pe-dev-response repository by provisioning a comprehensive PNG asset pack under the files directory. He focused on asset management and version control using Git, ensuring each upload was traceable and could be rolled back if needed. No code changes were made, which preserved business logic stability and minimized deployment risk. By preparing these assets, Mark enabled faster frontend iteration and consistent UI polish for future sprints. His work emphasized careful asset organization and readiness for rapid development, leveraging skills in asset pipeline management and collaborative version-controlled workflows.