Windows Developer Blog · Oct 8, 2026 · 5:21 AM

Microsoft Execution Containers go GA so coding agents only touch the files and hosts you allow

Announced Oct 7, MXC takes one JSON policy (writable and read-only paths, network, desktop access) and enforces it outside the agent with AppContainer on Windows, Seatbelt on macOS, or Bubblewrap on Linux, plus Windows-only session and WSL containers and an experimental microVM. Copilot, Codex, Replit, OpenClaw, and LM Studio already support it with Claude Code listed as coming, and a Learning mode logs what an agent tried to reach so you can write a least-privilege policy.

Read at blogs.windows.com

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