During November 2024, Eunbi Kim established the foundational architecture for a To-Do List Management Program in the eunbi-kim/24_2_W_SeProj repository. She created an initial design diagram using diagramming tools and XML, outlining system components and data flows to serve as a reference for future development. This artifact provided a clear architectural baseline, supporting efficient onboarding and alignment with project objectives. While no bugs were reported or fixed during this period, Eunbi maintained thorough documentation and repository hygiene. The work focused on architectural planning rather than implementation, demonstrating depth in system design and preparation for subsequent development phases.