Worked on the openclaw/openclaw repository to deliver a security enhancement focused on preventing prompt injection from external sources such as Gmail and webhooks. The solution involved wrapping externally-sourced content in security boundaries and prepending explicit instructions to the large language model, ensuring all incoming content is treated as untrusted. This approach reduced the risk of unintended automated actions and improved the reliability of integrations. The work required backend development skills, LLM integration, and a strong emphasis on security, utilizing JavaScript and TypeScript. The enhancement strengthened content isolation and established robust guard rails for secure content processing within the core system.