December 2024 monthly performance focused on code readability and API consistency within the cctbx_project repository. Delivered a naming clarity enhancement by renaming the method run_filter_by_unit_cell (from filter_by_unit_cell); functionality remains unchanged, preserving API compatibility. The accompanying commit 122e3dd3e9f638500478434c2c6bc134e1cff063 represents minor polish (typo fix) aligned with the rename. No major bugs fixed this month; a small polish change was implemented to improve overall code quality. Impact includes improved maintainability, clearer API surface for downstream users, and faster onboarding for new developers. Technologies/skills demonstrated include Python codebase refactoring, naming conventions, code quality discipline, and repository hygiene across a large-scale project.