During March 2025, Daniel Cheng focused on improving the flat_hash_set component in the Esri/abseil-cpp repository by clarifying its API documentation and enhancing test coverage. He addressed ambiguity around key requirements by specifying that keys must be MoveConstructible rather than CopyConstructible, reducing the risk of misuse for developers. To validate this change, Daniel implemented a MoveOnlyInt-based unit test in C++ to ensure that non-copyable but movable keys are supported as intended. His work combined C++ development, software documentation, and unit testing, resulting in clearer onboarding guidance and better alignment between documentation and implementation for future contributors and users.