Shihuashen developed the BrowserManager Domain Restriction Enforcement feature for the google-gemini/gemini-cli repository, focusing on strengthening navigation security and compliance. Using TypeScript and leveraging skills in browser automation and security testing, Shihuashen engineered logic to detect and block embedded URLs in query parameters, addressing potential bypasses of allowed domain restrictions, including those attempted via proxies. The implementation included comprehensive tests to validate that only permitted URLs are accessible, ensuring stricter adherence to security policies. This work improved the integrity of domain restriction enforcement, enhanced test coverage, and demonstrated a thoughtful approach to cross-team collaboration and system-level security compliance.