Agent Sandboxing Momentum: Microsoft MXC GA + Community Patterns
Microsoft shipped Execution Containers (MXC) 1.0.0 GA (open source) with process/session/WSL/MicroVM options and macOS process container support. Concurrent community discussion of CubeSandbox-style isolated execution for OpenClaw + DeepSeek Harness (134 ms spin-up, control/execution plane split). Multiple other sandboxing signals in the same week.