Alex O. enhanced SharePoint link security within the sublime-security/sublime-rules repository by refactoring the detection logic in unrelated_sharepoint_link.yml. Focusing on detection rule engineering, Alex optimized the regular expression to more accurately identify suspicious SharePoint URLs, reducing false negatives and improving overall coverage. The work involved careful YAML configuration management and precise regex development to ensure stability in a security-critical environment. No bug fixes were required, reflecting a stable and targeted feature delivery. This update strengthened phishing detection and streamlined security triage for users handling SharePoint links, demonstrating depth in regex optimization and configuration governance within YAML-based rule sets.