Contributed to the andiwand/acts repository by developing two core features focused on enhancing track-based jet analysis and improving track-state clarity. Built a FastJet plugin within the ACTS framework using C++ and CMake, enabling creation and analysis of track-based jets with configurable kinematic cuts for advanced jet physics studies. Introduced a new TrackStateFlag, SplitHitFlag, expanding enumeration logic to clearly identify shared measurements across tracks and improve data reproducibility. Emphasized explicit ownership semantics and maintainable code structure, resulting in a reusable analysis component for track-density proxy studies. The work demonstrated depth in low-level programming, data structures, and plugin development.