Worked on enhancing the stability and correctness of Neo Chess within the rmit-nct/hub repository, focusing on a critical bug affecting checkmate detection after pawn promotion. Addressed an edge case where promoted pawns could cause incorrect end-game states by refining the checkmate evaluation logic and exposing the isKingInDanger function to improve drag-and-drop reliability. The solution involved targeted updates in TypeScript, leveraging game development expertise to validate last-rank promotion scenarios and ensure accurate game outcomes. No new user-facing features were introduced during this period, with efforts concentrated on maintaining code stability and improving user trust through precise, well-tested changes.