MCPInstall

docker-sandbox

Create, manage, and execute agent tools (claude, codex) inside Docker sandboxes for isolated code execution. Use when running agent loops, spawning tool subprocesses, or any task requiring process isolation. Triggers on "sandbox", "isolated execution", "docker sandbox", "safe agent execution", or when working on agent loop infrastructure.

Installs
103
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Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/joelhooks/joelclaw --skill docker-sandbox
  1. 01

    Install

    Run the command in your project. The CLI asks which agents to install for.

  2. 02

    Describe the task

    Ask your agent for something this skill covers. It loads docker-sandbox automatically when relevant.

  3. 03

    Review the result

    The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

Docker sandbox

Resolve whether the request is a demo/example workspace or a runtime workload. For demos, examples, and isolated workshop work, use the installed sandbox-computer skill and its standing template. For runtime jobs, use workflow-rig and the configured sandbox adapter.

Inspect the target directory and current Docker capability. Use live help for the selected tool. Preserve user files and existing container ownership. A scaffold request ends with the scaffold; a launch request includes starting and verifying the requested workspace.

Keep authentication owned by the sandbox's approved login mechanism and persistent auth volumes. Never copy the user's real auth directory into a demo, embed credentials in an image, print auth files, or put credential payloads in command arguments. Check login through status commands that do not reveal tokens.

Isolation is part of the contract. If the requested sandbox is unavailable, diagnose that capability or report the precise block. Do not silently execute its task on the host. Host mode requires authorization when it changes the requested isolation boundary.

Publish only requested ports through the owning host mechanism. Verify the expected service before reporting a URL. Stop and remove only containers and processes this task owns. Report the actual sandbox, mounted project, checks, and any unresolved limitation.

FAQ

What does the docker-sandbox skill do?

Create, manage, and execute agent tools (claude, codex) inside Docker sandboxes for isolated code execution. Use when running agent loops, spawning tool subprocesses, or any task requiring process isolation. Triggers on "sandbox", "isolated execution", "docker sandbox", "safe agent execution", or when working on agent loop infrastructure.

How do I install docker-sandbox?

Run npx skills add https://github.com/joelhooks/joelclaw --skill docker-sandbox in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/docker-sandbox/ (personal) or .claude/skills/docker-sandbox/ (project).

Which AI agents can use docker-sandbox?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is docker-sandbox safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains docker-sandbox?

It is published by joelhooks in joelhooks/joelclaw. It has 103 recorded installs.

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