Worked on enhancing GUID handling across the microsoft/kiota-typescript and Philippus/kiota repositories, focusing on improving reliability and type safety in generated SDKs. Refactored the RequestInformation component to validate and normalize GUIDs using parseGuidString, reducing runtime errors in request construction. Updated TypeScript code generation to align with abstractions, ensuring GUIDs are emitted as primitive strings and sourced from @microsoft/kiota-abstractions for consistency. Leveraged skills in API client development, code generation, and refactoring using TypeScript and C#. These changes improved cross-repo consistency, streamlined maintenance, and facilitated faster onboarding for developers integrating with the generated API clients.