Agent sandbox (Box)

Use this when an autonomous agent needs a place to actually do work — clone a repo, run builds/tests, install packages, host a preview — isolated from the user's machine. Box is a full VM, so the agent has a real OS to operate in, and the Claude Code / Codex CLIs ship preinstalled.

Why Box

• Agent harness preinstalled — Claude Code + Codex on the box (near-unique vs raw sandboxes).
• Full machine — the agent can apt install, run Docker, spawn long processes, expose ports.
• Isolated & disposable — one box per agent/task; box delete to clean up.
• Cheap at fleet scale — per-second flat pricing, ~10× cheaper than E2B/Modal.

Prereqs

curl -fsSL https://box.ascii.dev/install | sh, then box login "$BOX_API_KEY" --json.

Recipe