During the month, contributed to the TanStack/store repository by addressing a critical bug in the shallow equality logic for Map and Set objects, focusing on stabilizing core data structures in frontend state management. The work involved refining the comparison function to validate Map entry pairs, Map sizes, and Set value equality, ensuring accurate detection of state changes and preventing unnecessary UI re-renders or incorrect memoization. Utilizing JavaScript and TypeScript, the solution improved reliability for applications using Map or Set as state keys. The fix was thoroughly documented, providing clear criteria for future maintenance and supporting robust state management workflows in JavaScript applications.