agentbox

---

name: agentbox description: "Fork the current agent session into a new VM or local Docker container with all the project files, agent settings and session teleported into." disable-model-invocation: true context: fork agent: general-purpose allowed-tools: Bash

Fork the current Claude Code session into a fresh AgentBox box.

1. Resolve the provider flag from $ARGUMENTS:

   • empty → no flag (uses the default docker provider)
   • docker | daytona | hetzner | vercel | e2b → pass --provider $ARGUMENTS
   • anything else → stop and tell the user the valid values are docker, daytona, hetzner, vercel, e2b

2. Detect an active plan (optional --plan). If this session was just working on a Claude Code plan, carry it into the box so the fork resumes in plan mode.

   • If you know the plan file path for this session (plan mode writes it to ~/.claude/plans/<slug>.md, and you have it from the plan you just produced in this conversation), use that path.

   • Otherwise, find the most recent plan only if it was touched in the last 15 minutes (a stale plan from another task should not be resurrected). Run via the Bash tool:

     find "$HOME/.claude/plans" -name '*.md' -mmin -15 -type f 2>/dev/null \
       | xargs -r ls -t 2>/dev/null | head -1
     

     If it prints a path, that's the current plan; if it prints nothing, there is no active plan — skip --plan.

3. Fork. If you are in plan mode, exit it, then run, via the Bash tool, exactly one command (add --plan "<path>" only if step 2 found a plan). Do NOT pass --session: agentbox fork autodetects the current Claude session itself (and safely falls back to the newest session for this workspace), which is correct even when this skill runs in a subagent where $CLAUDE_CODE_SESSION_ID would be the subagent's id, not the conversation you want to fork:

   agentbox fork [--provider $ARGUMENTS] [--plan "<plan path>"]
   

4. Report. In one line, give the user the new box name (parse it from the command output) and confirm their host session is unaffected. If you passed --plan, mention the box opens in plan mode ready to resume. Do not summarize the conversation — the fork already carries it.

For Hetzner cloud boxes only, when in Codex App or Claude Desktop, use can add a ssh connection to the box. To do this first add an alias to their ssh config, then instruct them how to add the connection:

agentbox shell <box> --ssh-config          # writes ~/.ssh/config + prints details

to add a ssh alias that the user can use to connect to the box

When in Codex App return a clickable link in the response for an easy way:

[Add <ssh-alias> to Codex SSH](codex://settings/connections/ssh/add?name=<ssh-alias>)

Troubleshooting

• If agentbox command fails, tell the user to install AgentBox by writing ! npm -g install @madarco/agentbox in the chat.
• If AGENTBOX_RELAY_URL is set in the environment, you are running inside a box. This command is host-only in v1; tell the user box→box fork is not supported yet.
• If you need to know more about Agentbox, check the /agentbox-info skill that containes the full documentation.