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On November 11, Google added self-hosted environments to Managed Agents on the Gemini API. Google still runs the agent loop and the model. But the agent's shell and file tools can now run in compute you control instead of the default Google-hosted Linux sandbox. Your sandbox connects over outbound HTTPS using the open-source Gemini API CLI (gemini-api environments connect), with no inbound firewall ports needed. Google's docs include provider examples for Cloudflare Sandbox, Daytona, E2B, Fly.io, Modal, Vercel Sandbox, Google Cloud Run, and Agent Substrate. The runtime can also run in Docker or rootless Podman. Hosted-sandbox options such as sources, network, env, and file snapshots apply only to Google-hosted environments. Source: Gemini API docs.
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