During April 2025, Yato focused on improving codebase hygiene in the facet-rs/facet repository by addressing a targeted bug related to memory management. Working in Rust, Yato removed the unused PtrMut::write method from facet-core/src/ptr.rs, clarifying the PtrMut API and reducing maintenance overhead. This cleanup enhanced the maintainability of the systems programming code and ensured a clearer API surface for future development. All changes were explicitly linked to issue #241, maintaining traceability and adherence to repository standards. Yato’s work demonstrated a methodical approach to code quality, emphasizing long-term maintainability and clarity in a systems-level Rust codebase.