During April 2026, Hanzi Shen enhanced the langchain-ai/langchain repository by improving the reliability and authentication handling of the Ollama client. Hanzi implemented URL normalization so that scheme-less base URLs default to http://, reducing configuration errors and deployment issues. The solution preserved Authorization headers when userinfo credentials were present, ensuring consistent authentication across both synchronous and asynchronous client modes. Hanzi used Python for backend and API development, supplementing the changes with targeted unit tests to cover edge cases involving scheme-less URLs and credentials. The work demonstrated careful attention to regression safety and addressed a nuanced aspect of client integration reliability.