Worked on the auth0-auth0-spa-js repository to enhance refresh token handling in the SPA SDK, focusing on the useRefreshTokens flag. Applied TypeScript and front end development skills to clarify the flag’s semantics, replacing outdated terminology and updating documentation to align with current authentication practices. The approach emphasized precise language and clear guidance, reducing the risk of misconfiguration and improving the overall developer experience. Contributed disciplined code comments and thorough documentation, ensuring alignment with project standards. The work addressed both technical and usability aspects, resulting in a more robust and accessible authentication flow for developers integrating with the SDK.