Robert Egglestone enhanced contributor onboarding and runtime documentation for AWS Synthetic Canaries within the DefinitelyTyped/DefinitelyTyped repository. He focused on updating the README and related documentation to clarify how contributors should update TypeScript types and download the syn-nodejs-puppeteer runtime from AWS. Using Markdown and leveraging his expertise in AWS and TypeScript, Robert introduced a new contributions section and detailed runtime guidance, addressing gaps in onboarding and workflow clarity. His work improved maintainability by making the process for updating AWS-related typings more transparent, ultimately reducing onboarding time and supporting better collaboration among contributors. The scope was focused and well-executed.