Over two months, this developer focused on strengthening memory safety, input validation, and test reliability across core C and C++ libraries, including facebook/folly, apache/arrow, libsdl-org/libavif, and onekey-sec/unblob. They addressed critical bugs such as out-of-bounds writes in folly’s SocketAddress and unsafe JSON parsing in Arrow by introducing explicit runtime checks and expanding regression test coverage. In libavif, they improved deterministic memory management and refactored test code for safer data handling using C++ and Python. Their work reduced the risk of data corruption and runtime errors, while enhancing maintainability and robustness in performance-critical, low-level components.