How We Built Sandbox Infrastructure for Autonomous Agents
How we built the workspaces where AI agents execute, explore, and learn from experience. A deep dive into the architecture behind realistic, reproducible, fast, and isolated agent execution using Daytona Sandboxes.
An agent is only as capable as the environment it can safely act in. You can have a strong model and a perfect reward signal, but without a real place to execute, none of it is verifiable. Capability you cannot verify is just a claim.
So we built workspaces that resemble a developer's laptop rather than a locked-down shell. Real filesystem, a running Docker daemon, cloned repositories, MCP servers, and databases with real data. Rather than reasoning about whether a change should work, the agent builds the app and runs it.
We rely on Daytona as a sandbox provider to make this practical. Our warm sandbox pools let us keep environments pre-provisioned and ready, so agents attach almost instantly instead of waiting on a cold boot. Daytona's kernel and hardware level isolation is also what lets us hand agents this much execution power without the risk of one sandbox bleeding into another.
Handing an agent that much power sounds reckless until you move the dangerous parts out of reach. Secrets never enter the sandbox at all. A proxy attaches them on the way out, and a strict egress allowlist means a prompt-injected request to an unapproved host never leaves the boundary.
Every run also starts from an identical database, branched copies of data from a shared reference, so determinism costs almost nothing. That turns a sandbox run into the closest version to a real production run.
The future of reliable agents will not come from limiting what they can do. It will come from building environments where they can do more safely.
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