Chaehee Hong contributed to the Samsung/TizenFX repository by focusing on both stability improvements and long-term API modernization. In one project, Chaehee addressed a critical memory management issue in the WiFi subsystem by eliminating a double-destroy vulnerability in the ReleaseHandle path, using C# and memory safety analysis tools to prevent heap-buffer-use-after-free errors and reduce crash risk. Additionally, Chaehee led the deprecation of the Telephony API, marking obsolete classes and preparing migration documentation to align with the product roadmap. This work demonstrated depth in bug fixing, API lifecycle management, and Tizen development, ensuring both immediate reliability and future maintainability.