Zihch worked on the OfficeDev/teams-toolkit repository, focusing on stabilizing group plans functionality and enhancing the AI chatbot testing framework. Using Python, they refactored core backend components to resolve errors in group plan operations and display, directly addressing user-impacting issues. Zihch also improved the chatbot testing process by streamlining test plans and refining assertion logic, which increased test reliability and reduced flakiness. Their disciplined approach to bug fixing and testing contributed to sustained code quality and repository health. The work demonstrated depth in backend development, AI chatbot integration, and rigorous testing practices, resulting in more reliable deployments and accelerated development cycles.