Matthew Lewis enhanced ES module interoperability and dependency management across the slackapi/bolt-js and vercel/examples repositories. He improved the App class export in bolt-js, enabling both named and default exports to streamline compatibility with ES module systems and modern JavaScript workflows. Additionally, he upgraded the axios dependency to version 1.12.0, reducing maintenance risk and ensuring up-to-date security. In vercel/examples, Matthew addressed a front-end rendering issue by correcting HTML entity encoding in the welcome modal, ensuring accurate display of text. His work demonstrated proficiency in JavaScript, TypeScript, and front-end development, delivering targeted improvements with clear technical depth.