Worked on enhancing the netlify/cli repository by improving continuous integration stability and test reliability, focusing on reducing flaky integration tests and addressing race conditions. Leveraged TypeScript and Node.js to consolidate the CI test environment, implementing strategies such as skipping problematic yarn install tests for Node 20.12.2 due to dependency constraints and Node 20 end-of-life considerations. Re-enabled npx install tests on Windows while selectively skipping all run tests to optimize Windows CI performance. Transitioned test code toward a typed interface, which improved testability and maintainability, ultimately strengthening release confidence and supporting faster, more reliable development workflows for the team.