Worked on the pydantic-ai repository to improve data handling in the Weather Agent, focusing on robust JSON serialization and clean data presentation within the chatbot interface. Addressed a bug by implementing logic to serialize Pydantic BaseModel instances using model_dump_json(), while defaulting to json.dumps() for other data types, ensuring consistent and structured output from tool calls. This targeted fix enhanced reliability and maintainability of the data formatting pipeline. Leveraged Python and Pydantic to align with best practices in JSON serialization, resulting in clearer, more predictable data flows for chatbot users. The work emphasized precision and adherence to established engineering standards.