During November 2024, Jia Grieve focused on refining the Buck Daemon data model within the facebook/buck2-prelude repository. Their work centered on removing the redundant has_owning_targets flag, reverting a previous change to streamline the internal data flow and improve maintainability. By simplifying the get_files_per_target_typed return type, Jia aligned the data structure more closely with actual ownership semantics, reducing unnecessary conditional logic. This cleanup enhanced the reliability of the build system and made future maintenance more straightforward. Jia applied their expertise in build systems and Python development, working primarily with Python and BXL to address a targeted bug and improve code clarity.