Worked on the polarsource/polar repository to deliver targeted documentation updates supporting TanStack integration, focusing on improving the onboarding process and integration accuracy for developers. The work involved updating the example API route, refining import statements, and revising the server route creation method to reflect the latest TanStack usage for implementing a checkout handler. Using Markdown for documentation and TypeScript for code examples, the updates ensured that the integration guide remained consistent with current library practices. This approach reduced friction for developers integrating TanStack with the polar checkout flow and supported future API changes by enhancing documentation clarity and maintainability.