Worked on the eunbi-kim/24_2_W_SeProj repository to enhance onboarding and future development by building and refining system design documentation for a To-do List Management feature. Focused on creating and updating draw.io diagrams to reflect evolving requirements, ensuring that design assets remained aligned with implementation plans. Emphasized diagramming and documentation skills, leveraging XML and draw.io to maintain high diagram fidelity and repository clarity. No critical bugs were addressed during this period, as efforts centered on improving documentation accuracy and supporting collaborative workflows. The work enabled faster onboarding, clearer code reviews, and provided a solid foundation for downstream feature development.