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ariana-dot-devariana-dot-dev/cloud-sandbox-vm-skills/skills/docker-sandbox/SKILL.md

docker-sandbox

Skill2 starsChanged 5 months agoMITView on GitHub

Run Docker and containers in a cloud sandbox — a full root Ubuntu VM with Docker preinstalled and real kernel access, so `docker build`/`docker run`/compose all work (unlike isolate-based sandboxes that can't run Docker). 4 vCPU / 8 GB / 80 GB, per-second billing. Use to build images, run compose stacks, or test containers off-host.

  • Pipes a download into a shell
  • Reads credentials

5 other projects use a version of this.

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The file

We split this skill into the rules it gives an agent

1 rule. 0 are common, 0 are distinctive, and 1 is very specific to this project.

  • 0

    Common

    Most of the 4 edited versions we read keep these.

  • 0

    Distinctive

    This author's own choices. Worth a look.

  • 1

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Very specific:

    Use this when a task needs Docker: building an image, running docker compose, or testing a container.

    line 8

“Common” is measured: kept by at least 6 in 10 of the 4 edited versions of this file we could read. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

Docker sandbox (Box)

Use this when a task needs Docker: building an image, running docker compose, or testing a container. Many sandboxes (V8 isolates, restricted microVMs) can't run Docker at all — Box is a full VM with Docker preinstalled, so it just works.

Why Box

  • Docker preinstalled, real machine — docker build, docker run, compose stacks.
  • 80 GB disk — room for images and layers.
  • Cheap & isolated — per-second billing, separate from the host.

Prereqs

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

Recipe

box_id="$(box new --json | jq -r 'select(.event == "ready") | .id')"
box ssh "$box_id" -- bash -s < ./clone-and-build.sh   # git clone + docker build
box ssh "$box_id" -- "cd /project && docker compose up -d"
box ssh "$box_id" -- "host 8080"                       # expose the running container
box delete "$box_id" --json

Limits

EU-only; 100 active VMs soft cap; disk-level snapshots (containers don't survive stop/resume — restart compose after resume).

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