Worked on the Chainlit/chainlit repository to enhance backend reliability and authentication workflows using Python. Addressed Microsoft Graph OAuth integration by correcting offline_access scope handling in AzureADOAuthProvider and AzureADHybridOAuthProvider, ensuring smoother enterprise authentication and reducing support issues. Improved the robustness of user-thread retrieval by introducing targeted error handling and input validation in the get_all_user_threads flow, which mitigated failures from storage providers and prevented invalid inputs from propagating. Focused on backend development, API integration, and database management, the work prioritized stability and maintainability, laying the groundwork for more resilient authentication and data access layers within the platform.