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The Cheapest Way to Sandbox an AI Coding Agent on Windows

A developer outlined a lightweight method for sandboxing an AI coding agent on Windows by mapping the agent's working folder to its own drive letter, so the agent sees a clean filesystem root and destructive commands like `rm -rf /` only affect the sandbox. The approach is positioned as an alternative to Docker, WSL, and VMs for the narrower goal of preventing an agent from touching the rest of the drive, while the developer notes Docker remains the right tool when network or dependency isolation is needed.

read1 min views1 publishedOct 24, 2026

Docker. WSL. VMs. All work, but all are heavy when you just need to stop an AI agent from touching your whole drive.

Map the agent's working folder to its own drive letter. Windows treats it as a real drive. The agent sees a clean filesystem root. If it runs rm -rf /, it only nukes its own sandbox.

If you need network isolation or dependency isolation, Docker is still the right tool. But for "stop the agent from deleting my photos," a drive letter is enough.

Try it before your next agent incident.
source & further reading
dev.to — original article Claude Code File System Boundaries in 2026: What `--add-dir`, Allowed Paths, and Sandbox Roots Actually Restrict What my review gate does about weakened or deleted tests Why Monolithic AI Gateways Are Losing Ground in 2026
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