Worked on enhancing the testing infrastructure and code quality for the arcsysu/YatCC repository, focusing on improving reliability and maintainability. Implemented updates to the CTest configuration to ensure that tests are consistently discovered and executed within continuous integration workflows. Introduced clang-format and clang-tidy configurations to enforce coding standards and enable static code analysis, helping to catch issues early and maintain a uniform codebase. Leveraged C++ and CMake to streamline the development process, resulting in faster feedback loops and smoother onboarding for new contributors. The work emphasized robust testing practices and automated quality checks to reduce future defects and debugging time.