Wajid Zahoor delivered a security tooling upgrade for the DiamondLightSource/dodal repository, focusing on enhancing credential detection in the development workflow. He replaced the existing Talisman pre-commit hook with Gitleaks, updating the .pre-commit-config.yaml file to reference the new hook and removing the obsolete .talismanrc configuration. This change improved the repository’s preventive controls by enabling earlier detection of sensitive credentials in pull requests, aligning with security best practices. Working primarily with yaml and leveraging DevOps and security expertise, Wajid’s contribution increased CI reliability and reduced the risk of credential leakage, demonstrating a focused approach to codebase security improvements.