Over a two-month period, 9aoyuao contributed to both the web-infra-dev/rslint and lynx-family/lynx-stack repositories, focusing on testing modernization and build tool stability. For rslint, they integrated rstest into rslint-test-tools, replacing the legacy test runner with rstest’s core features and updating snapshot assertions, which streamlined test validation and improved consistency. In lynx-stack, they addressed a compatibility issue by disabling Rsbuild’s lazyCompilation by default for Rspeedy, adding tests to ensure safe configurability and aligning defaults across projects. Their work demonstrated solid proficiency in JavaScript, TypeScript, and build tools configuration, with a focus on maintainability and reliability.