During January 2025, Byungil Yi enhanced the JeffersonLab/halld_recon repository by updating particle identification logic to support new PDG codes for deuteron, triton, He-3, and He-4. He refactored the C++ codebase, modifying PDGtype and PDGtoPType functions to ensure accurate mapping between particle types and their codes, which improved the reliability of physics simulations and data analysis. Byungil also standardized code formatting in particleType.h, replacing tabs with spaces to promote readability and long-term maintainability. His work focused on code formatting, data management, and refactoring, resulting in cleaner, more robust foundations for future particle physics research.