During November 2024, Eunbi Kim developed and refined system diagrams for a To-Do List management feature in the eunbi-kim/24_2_W_SeProj repository. Focusing on diagramming and documentation, Eunbi used Draw.io and XML to create and enhance visual models that clarify user interactions and system flows. The work emphasized layout optimization and design traceability, resulting in assets that serve as clear references for both developers and stakeholders. While no bugs were addressed during this period, the documentation improvements accelerated onboarding and facilitated cross-team collaboration. The depth of work centered on maintaining high-quality, version-controlled diagrams to support ongoing project development.