Worked on core infrastructure in the ClickHouse/ClickHouse and apache/incubator-gluten repositories, focusing on maintainability and stability rather than feature development. Improved documentation and code clarity in C++ components related to hashing, refining comments and correcting typos to support onboarding and long-term maintenance without altering functionality. Addressed a configuration typo in the gluten repository, restoring Spark stage resource auto-adjustment and improving resource predictability. Emphasized clear commit messaging and traceability, collaborating effectively to ensure changes were well-documented and auditable. Utilized skills in code commenting, configuration management, and documentation, with work primarily involving C++ and Markdown across both projects.