Exian developed CLI-focused enhancements for the UKGovernmentBEIS/inspect_evals repository, delivering a more flexible and efficient SWE-bench Sandbox. Using Python, Docker, and Kubernetes, Exian refactored the sandbox configuration to support dynamic CLI parameters, such as sandbox type and image naming, and eliminated the need for upfront image building. The work introduced provider-agnostic sandboxes, reduced image footprint by leveraging pre-pulled registry images, and improved startup performance. Exian also strengthened metadata handling by merging user and version metadata, updated documentation, and ensured code quality through type checks and test updates. The changes addressed usability, performance, and maintainability in a single feature release.