During December 2024, Matt Oakley focused on backend security enhancements for the Shopify/shopify_app repository. He addressed a vulnerability in Content Security Policy handling by updating the frame_ancestors configuration to accept values as individual arguments rather than a single string, aligning with updated security requirements and reducing exposure to framing attacks. This change was implemented in Ruby within a Rails environment, emphasizing secure coding practices and compliance. Throughout the process, Matt ensured that all modifications maintained compatibility with the existing test suite and continuous integration workflows. His work demonstrated careful attention to risk reduction and stability in backend application security.