Worked on the alibaba/spring-ai-alibaba repository to refactor the tool-calling module, focusing on unifying time processing and JSON handling for improved maintainability. The approach involved introducing a dedicated TimeUtils class to centralize time-related logic and enhancing the JsonParseTool with new methods for streamlined JSON parsing and serialization. Related auto-configuration and service classes were reorganized to clarify ownership and simplify future maintenance. Leveraging Java, Spring Boot, and JSON processing skills, the work laid a foundation for more reliable tool integration by ensuring consistent data handling and clearer module boundaries, addressing architectural concerns rather than immediate bug fixes or feature expansion.