Worked on the facebook/buck2-prelude repository to improve the Buck Daemon data model by focusing on code cleanup and maintainability. Addressed a bug by removing the redundant has_owning_targets flag, reverting a previous change to simplify the internal data structure. Streamlined the get_files_per_target_typed return type to better reflect the presence of owners, which reduced unnecessary conditional logic and improved data flow reliability. Utilized Python and BXL within the context of build systems to enhance the clarity and maintainability of the codebase. The work emphasized careful refactoring to ensure the system remains robust and easier to extend in future development.