Worked on enhancing the microsoft/teams.py repository by improving the reliability and flexibility of the ConversationResource model in the Microsoft Teams Python client. Focused on backend and API development using Python, the work involved making the activity_id and service_url fields optional, which allowed conversations to be created without an initial activity and aligned the client with Teams API expectations. Expanded unit testing and updated mocks to ensure robust validation for both activity-based and activity-less conversation flows. This approach reduced integration friction for developers and reinforced test-driven development practices, resulting in a more adaptable and developer-friendly backend integration with Microsoft Teams.