Worked on the apache/rocketmq repository to enhance topic management by extending the maximum topic name length for retry and DLQ topics from 127 to 255 characters, while maintaining the existing limit for other topics. This targeted feature addressed operational challenges in large-scale deployments, reducing naming errors and improving reliability for retry pipelines and DLQ routing. The implementation involved backend development and API design in Java, with comprehensive unit tests added to validate the new constraints and prevent regressions. The work emphasized maintainability and scalability, ensuring that topic creation workflows remain robust and aligned with evolving production requirements without introducing regressions.