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Building a Safe, Effective Sandbox to Enable Codex on Windows

When I joined the Codex engineering team in September 2025, Codex for Windows didn’t have a sandbox implementation meaning that Windows users were forced to choose between two subpar options when using OpenAI's coding agents:

Building a Safe, Effective Sandbox to Enable Codex on Windows

TL;DR

  • Codex for Windows lacked a sandbox implementation.
  • This forced users into subpar options when using OpenAI's coding agents.
  • The author joined the Codex engineering team in September 2025.