Tobias Klauser refactored error handling in the srl-labs/containerlab repository, migrating from a third-party package to Go’s standard library. This backend development effort focused on reducing external dependencies and aligning error management with Go 1.13+ conventions, thereby improving long-term maintainability and simplifying future upgrades. Tobias applied Go expertise to standardize error patterns throughout the codebase, ensuring consistency without introducing user-facing API changes. The work addressed internal technical debt and mitigated dependency-related risks, demonstrating disciplined code quality and thoughtful dependency management. Over the month, Tobias concentrated on backend refactoring, leveraging Go and software engineering best practices to enhance project stability.