Ofri Peretz contributed to the DefinitelyTyped/DefinitelyTyped repository by developing comprehensive TypeScript typings and JSDoc documentation for Serverless Framework v4. Leveraging expertise in TypeScript and documentation best practices, Ofri designed type definitions that enhance type safety and improve IDE autocompletion for downstream users. The addition of detailed JSDoc comments supports maintainability and accelerates onboarding for developers adopting Serverless Framework v4. This work addressed integration risks by clarifying API contracts and providing clear guidance within the codebase. Ofri’s focused engineering effort delivered a single, in-depth feature that strengthens the developer experience and reliability of TypeScript projects using Serverless Framework.