The post walks through the tradeoffs behind AppContainer, Windows Sandbox, and integrity labeling before landing on a custom sandbox design. It emphasizes constrained file writes, safer network handling, and a boundary that follows every child process.
This matters because Windows users need agentic workflows that are practical, not fragile. A stronger sandbox means more trust in local automation and fewer reasons to disable safeguards just to get work done.
If you run Codex on Windows, the takeaway is simple: keep using the default sandboxed flow and review prompts carefully. The article is also a useful reference if you're designing your own agent runtime.
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