During April 2025, contributed to five repositories including kaiachain/kaia, onflow/cadence, ethereum/solidity, xmtp/xmtpd, and cosmos/cosmos-sdk, focusing on code optimization, refactoring, and documentation using Go and C++. Refactored memory call logic in kaiachain/kaia to leverage built-in max and min functions, improving code clarity and reducing potential errors. Enhanced IsFormatSupported in cosmos/cosmos-sdk by adopting slices.Contains and expanding test coverage. Improved documentation and comment accuracy in onflow/cadence, ethereum/solidity, and xmtp/xmtpd, aligning comments with implementation and clarifying testing utilities. These efforts strengthened maintainability, reduced misdocumentation risk, and ensured robust, well-tested code without introducing regressions.