Worked on the ultralytics/ultralytics repository to enhance model URL suffix validation by addressing issues with signed URLs containing query parameters. Using Python and backend development skills, implemented a solution that strips query strings from model URLs before validating the file suffix, ensuring that only the actual file extension is checked. This approach improved the reliability of model loading, particularly when authentication tokens are present in the URL, and reduced potential runtime failures. Added comprehensive test coverage to verify correct handling of URLs with query parameters, demonstrating a focus on robust testing practices and attention to edge cases in backend workflows.