During December 2024, contributed a focused security enhancement to the bigcommerce/cornerstone repository by implementing a nonce-based Content Security Policy across Checkout and MyAccount user flows. This work involved updating multiple HTML templates to add nonce attributes to script tags, ensuring that only scripts with a valid nonce could execute and thereby reducing the risk of cross-site scripting attacks. Leveraging frontend development skills and web security best practices, the developer addressed compliance requirements and improved the security posture of critical transactional pages. The solution was delivered as a single, high-impact feature using HTML and security-focused templating techniques, with no bugs documented.