Worked on the sourcegraph/src-cli repository to deliver Upload Failure UX Enhancements with Guidance, focusing on improving the user experience during upload failures. The update introduced clearer authentication and permission error hints, actionable error messages with direct documentation links, and refined host-detection logic that leverages both CLI parameters and repository URLs to pinpoint likely causes. Using Go for backend development and API integration, the work aligned client-side error handling with server-side error codes to reduce user confusion and streamline troubleshooting. These enhancements aimed to expedite remediation for users and decrease support inquiries by providing more actionable and context-aware feedback during failures.