Worked on enhancing the robustness of the FetchPlan component in the langgenius/dify repository, focusing on improving error handling and system reliability. Addressed a critical bug by introducing safe default values and implementing defensive checks to prevent undefined results during plan retrieval. This approach reduced runtime errors and stabilized downstream workflows, ultimately decreasing support overhead. Utilized TypeScript and React to ensure clearer error propagation and maintainable code structure throughout the front end. The improvements contributed to greater reliability for users and streamlined the process of handling edge cases, reflecting a thoughtful approach to front end development and system stability.