Worked on the openclaw/openclaw repository to enhance OAuth token reliability in backend authentication workflows. Focused on refining how expired OAuth tokens are handled, the developer implemented logic in TypeScript to suppress unnecessary warnings when a valid refresh token is present, ensuring tokens are correctly marked as renewable and reported as 'ok.' This approach reduced redundant re-authentication prompts, improving session continuity for users. Automated tests were added to verify the handling of credentials without refresh tokens, further strengthening reliability. The work leveraged skills in API integration and backend development, resulting in smoother user experiences and decreased support overhead for authentication issues.