Worked on the alibaba/ROLL repository, focusing on backend development and code refactoring using Python. Addressed two critical bugs to enhance system reliability and observability. Improved the RLVRPipeline by correcting the association of timing metrics with the metrics manager after the timer context exits, which ensures more accurate performance monitoring. In the strategy modules, resolved a syntax error in sampling parameter comparisons, making sure that stop_token_ids and presence_penalty are treated as distinct parameters to prevent incorrect grouping. Demonstrated attention to detail in performance monitoring and pipeline optimization, contributing to the overall correctness and maintainability of the codebase during the month.