cmux-fork

cmux-fork is a plugin for Claude Code from zhebil/claude-code-plugins. Its token cost is not measured, scanned A, original, MIT.

A command that creates a new cmux tab from the current coding-agent session. cmux is a terminal workspace that can hold multiple tabs.

In plain words
What is it for?
Use `/fork-new` when you want to continue work in a new cmux tab while leaving the current session open.
Why use it?
It lets you start a separate session without manually recreating the current session context.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest.

Good fit Use /fork-new when you want to continue work in a new cmux tab while leaving the current session open.

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Install in Claude Code
/plugin marketplace add zhebil/claude-code-plugins
/plugin install cmux-fork
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/zhebil/claude-code-plugins

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for cmux-fork

README.md
[![agentmods](https://agentmods.dev/badge/plugins/zhebil/claude-code-plugins/cmux-fork/github.svg)](https://agentmods.dev/plugins/zhebil/claude-code-plugins/cmux-fork)
Your own site
<a href="https://agentmods.dev/plugins/zhebil/claude-code-plugins/cmux-fork"><img src="https://agentmods.dev/badge/plugins/zhebil/claude-code-plugins/cmux-fork/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for cmux-fork

Your own site · 80×15
<a href="https://agentmods.dev/plugins/zhebil/claude-code-plugins/cmux-fork"><img src="https://agentmods.dev/badge/plugins/zhebil/claude-code-plugins/cmux-fork.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Security

Grade A, and why

cmux-fork scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured today.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/cmux-fork/.claude-plugin/plugin.json · 14 lines

What it actually says

{
  "$schema": "https://json.schemastore.org/claude-code-plugin-manifest.json",
  "name": "cmux-fork",
  "version": "0.1.0",
  "description": "Adds a /fork-new command that forks the session into a new cmux tab.",
  "author": {
    "name": "Zhebil"
  },
  "homepage": "https://github.com/zhebil/claude-code-plugins/tree/main/plugins/cmux-fork",
  "repository": "https://github.com/zhebil/claude-code-plugins",
  "license": "MIT",
  "keywords": ["mod", "cmux", "fork", "session", "command"]
}
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. today First seen · 14 lines scan A 3952dc772dcf

Subscribe to this mod's changes

cmux-fork is a plugin published in the GitHub repository zhebil/claude-code-plugins (7 stars, last pushed today), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-21.