During March 2025, Daniel Cheng focused on enhancing the Esri/abseil-cpp repository by clarifying the flat_hash_set API documentation and strengthening its unit tests. He addressed ambiguity around key requirements by specifying that keys must be MoveConstructible rather than CopyConstructible, reducing the risk of misuse for future users. To validate this, Daniel introduced a MoveOnlyInt-based 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 improved onboarding clarity and better alignment between documentation and implementation for developers integrating flat_hash_set into their projects.