Agentic infrastructure

1. Sandboxes must run inside our own network. Hosted sandboxes offer that only on enterprise plans, from about $3K a month.
2. Persistence comes first. A sandbox has to survive timeouts and node loss; one 11-hour session survived a spot instance termination.
3. Design for idle time. Per 20 GB, a running sandbox costs about $5 a month, a paused one about $1.60 (resumes in about 5 seconds), an archived one about $0.50 (about 30 seconds). At 200 sandboxes with 80% idle, that is about $200 a month instead of $1,000.
4. Build on Kubernetes (OpenSandbox on EKS), with a network policy per sandbox and agents running unprivileged.

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