Over a two-month period, contributed backend features to the langchain4j and quarkus-langchain4j repositories, focusing on enhancing OpenAI integration and developer workflows. Delivered opt-in support for input_image payloads and improved serialization logic using Java and Jackson, ensuring compatibility with OpenAI-compatible servers while maintaining backward compatibility. Developed comprehensive JUnit test suites and Maven-based validation to broaden test coverage, including fail-fast validation for unsupported image detail levels in the OpenAI Java SDK. The work strengthened CDI-based development for Quarkus extensions and improved reliability in image content handling, supporting both URL and base64 formats and reducing the risk of misconfiguration.