Worked on the dart-lang/core repository to enhance continuous integration workflows for the Dart2Wasm target, focusing on improving test coverage and compatibility. Leveraged CI/CD and testing expertise to update the CI matrix with current SDK versions and introduced a Chrome-based Wasm test step, enabling broader validation of WebAssembly features. Utilized YAML to configure and automate these processes, ensuring that numeric handling in the Wasm path was properly validated through expanded fixnum test coverage. These improvements increased the reliability and visibility of test results, allowing for quicker identification of regressions and reducing release risk for Dart2Wasm-related features.