Fleyah focused on security hardening for the openclaw/openclaw repository, developing a feature that enforces strict validation of environment variables within the exec tool. Using TypeScript and Node.js, Fleyah implemented risk-based input filtering and introduced a blocklist to prevent the use of dangerous host environment variables, while also prohibiting modifications to the PATH variable to mitigate risks of code injection and binary hijacking on non-sandboxed hosts. This backend development work addressed enterprise security requirements by reducing the attack surface and ensuring safer execution defaults, demonstrating a thoughtful approach to secure environment configuration and robust input validation in automated workflows.