During January 2026, contributed to the langchain-ai/langchainjs repository by implementing tool-calling support within the ChatZhipuAI model, enabling the system to invoke external tools such as weather services during chat interactions. This feature was developed using TypeScript and full stack development practices, focusing on enhancing conversational workflows for end users. Additionally, addressed a bug in the mergeDicts utility by updating its logic to sum numeric values rather than concatenate them, ensuring more reliable data handling. Updated and expanded response metadata tests to align with the new numeric behavior, improving overall test coverage and stability within the Langchain integration.