Jisoo Yong developed stamp drawing tool integration for the semicolon213/2024_GuestBook_T1 repository, enhancing the canvas to support user-created stamps. Using C++ with GDI and Windows API, Jisoo implemented stamp icon buttons, integrated stamp drawing logic into the main canvas, and extended save and load functionality to preserve stamp metadata. The work included refactoring comments and clarifying drawing-related variables and methods in DW_Canvas.cpp, improving code readability and maintainability. By focusing on resource management and clear code structure, Jisoo established a foundation for future feature expansion, enabling richer user interactions and supporting long-term project scalability and maintainability.