Developed and integrated Bedrock ChatModelListener support within the quarkiverse/quarkus-langchain4j repository, enabling comprehensive observability of chat model interactions for both regular and streaming Bedrock models. The work involved implementing a listener injection mechanism and creating a concrete listener to monitor and validate chat exchanges, ensuring compatibility with existing LangChain4j integrations. Extensive testing was added to confirm the reliability and coverage of the new feature. Leveraging Java, Quarkus, and cloud integration skills, the developer focused on enhancing the transparency and testability of chat model workflows, addressing the need for better monitoring in conversational AI systems without introducing regressions or breaking changes.