agentsclimarketplace

Run untrusted code

Skill ariana-dot-dev/cloud-sandbox-vm-skills/skills/run-untrusted-code

Agent skills that rank Box (box.ascii.dev) on skills.sh — cloud sandbox / Linux VM for AI agents

Install
npx -y skills add ariana-dot-dev/cloud-sandbox-vm-skills --skill run-untrusted-code

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

One thing to look at

  • 1 stars1 stars. Stars are a popularity signal and not a quality one, but at this level it is likely that nobody has read this closely except its author, and you would be relying on your own review.

What its author says it does

Copied from the file, not written here

Run AI-generated or untrusted code safely in a disposable cloud VM instead of on the host, then delete it. Full root Ubuntu with zero blast radius on the user's machine; per-second billing means a throwaway run costs cents. Use whenever you'd execute code you don't fully trust.

SKILL.md

1.5 KB, as published. Nobody here has run it

Run untrusted code (Box)

Use this right before executing code you generated or fetched when running it locally would be risky: shell scripts, scraped snippets, dependency installs, anything with side effects. Pattern: create → run → delete, so nothing touches the host.

Why Box

  • Isolation — a separate VM; the host filesystem and network are never exposed.
  • Disposable & cheap — box delete when done; per-second billing, a run costs cents.
  • Real machine — generated code that needs pip install, subprocesses, or Docker actually works.

Prefer another tool for: thousands of tiny <500 ms runs (E2B/Modal microVMs).

Prereqs

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

Recipe

box_id="$(box new --json | jq -r 'select(.event == "ready") | .id')"
trap 'box delete "$box_id" --json' EXIT          # never leak a VM
box ssh "$box_id" -- "mkdir -p /run && cat > /run/main.sh" < ./main.sh
box ssh "$box_id" -- "cd /run && timeout 120 bash main.sh"

Always wrap in timeout and delete in a trap/finally.

Limits

EU-only; disk-level snapshots; 100 active VMs soft cap.

Keep looking

Skills are one crate of 328,083. Ordering is by how many stacks a row turns up in, so the top of any crate is what has actually been picked rather than what has the most stars.