Tencent open-sources Cube Sandbox: lightweight agent runtime with cross-node pause/resume
dr_cintas · x · 2026-09-01
Tencent open-sourced Cube Sandbox, an instant, secure, lightweight sandbox runtime for AI agents to execute self-written code. The author notes the classic production pain: prototypes work on day one, then crack at hundreds of concurrent tasks. Cube's last two releases target exactly that:
- Kubernetes deployment for control plane and compute nodes, pluggable persistent volumes, template aliases
- Cross-node pause/resume: a running sandbox can stop on one machine and resume on another, carrying its full memory and filesystem
- Upgrades no longer break existing templates, snapshots, or paused instances
Built on RustVMM + KVM, Apache 2.0, fully open source.
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