Worked on the opentofu/opentofu repository to enhance OCI credential management and authentication workflows using Go. Delivered per-repository credential handling, removing reliance on oras.Ping and introducing targeted tests to validate secure authentication flows. Improved test quality by refactoring for clearer failure isolation and expanding coverage to include 401 Unauthorized scenarios, reducing production risk and supporting safer CI integration. Focused on backend development and API integration, these contributions strengthened security posture and reliability in OCI workflows. Emphasized maintainable code through typo corrections, enhanced comments, and clear commit documentation, resulting in more robust credential governance and streamlined developer productivity for OCI integrations.