Worked on the UKGovernmentBEIS/control-arena repository with a focus on enhancing security and stability through targeted dependency management. Addressed a critical supply chain risk by updating the LiteLLM dependency in the project’s TOML configuration, explicitly avoiding compromised versions in line with security incident guidance. This proactive approach reduced exposure to known vulnerabilities and improved the security posture of dependent components and downstream services. Demonstrated skills in secure software supply chain practices, version pinning, and change tracking using Git. The work emphasized adherence to security best practices and configuration hardening, ensuring the repository remained resilient against emerging threats.