Worked on reliability and safety improvements for the Netlify CLI and Build repositories, focusing on developer experience and build accuracy. Implemented enhanced error handling in Node.js and TypeScript to address port conflicts, providing clearer guidance when ports are in use. Introduced confirmation prompts for destructive CLI actions, ensuring safer operations while maintaining efficiency in CI environments. In the netlify/build repository, fixed environment variable filtering to ensure builds reflect the correct context, improving predictability and reducing deployment risk. Leveraged skills in build systems, environment configuration, and testing to deliver changes that streamline local development and continuous integration workflows for users.