9th November 2025
Research
OpenAI Codex CLI Sandbox Implementation Analysis
— OpenAI Codex CLI's sandbox employs strong, platform-specific isolation to securely constrain the behavior of AI-driven code agents. On macOS, it uses Apple's Seatbelt sandbox with finely tuned dynamic policies, while on Linux, it combines Landlock for strict filesystem controls and seccomp for syscall-based network blocking—ensuring that agents can only write to user-approved directories and have no outgoing network by default.
Recent articles
- Locating the source of a mysterious beep with Claude - 9th November 2026
- Hide your slop PR descriptions behind <details><summary> - 9th November 2026
- Qwen 3.8 27B on my laptop can interpret model weights, too - 3rd November 2026
- The U.S. Census Bureau and “Super Intelligence” - 2nd November 2026