During February 2026, Adeecc11 focused on enhancing data-statistics capabilities in the cmu-db/optd repository by implementing column-level statistics support within the DataFusion connector. This work involved refactoring core statistics types for broader reuse, extending the Catalog API, and enabling cross-crate sharing through serde integration. Adeecc11 also contributed to cmu-db/bustub by expanding test coverage for the ARC Replacer’s remove function, ensuring robust eviction and frame-removal logic. Utilizing Rust, C++, and backend development skills, Adeecc11’s contributions improved data accuracy, maintainability, and regression safety, demonstrating a thoughtful approach to API design, data processing, and test-driven development within complex database systems.