During February 2025, this developer enhanced the mybatis/mybatis-3 repository by introducing a new public MapperMethodInvoker interface within the mapper binding layer. By moving this interface from a nested scope to its own file, they improved the modularity and accessibility of the codebase, directly addressing issue #3414. Their work focused on strengthening the API surface for the mapper proxy mechanism, making it easier to extend and integrate with downstream modules. Utilizing Java and applying principles of API design and software architecture, the developer delivered a targeted, well-scoped feature that increased the testability and extensibility of the existing system.