During December 2024, this developer contributed to the fmtlib/fmt repository by designing and implementing a new API that enables retrieval of the dynamic format argument store’s size. The feature was developed in C++ and included comprehensive unit tests to ensure the reliability and correctness of the new method. By exposing the store size, the work provides greater visibility into memory usage and lays the groundwork for future optimizations within the library. The approach emphasized robust C++ development practices and thorough unit testing, resulting in a well-integrated addition that enhances the maintainability and extensibility of the fmtlib/fmt codebase.