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cmux

by manaflow-ai · manaflow-ai/cmux

Mac-native terminal with vertical tabs built for AI agent flow — keep several Claude Code / Codex sessions visible at once.

cmux is a terminal app optimized for the multi-agent coding workflow: vertical tabs make it easy to see several Claude Code or Codex sessions; clipboard and selection patterns match agent use.

Why use it

Key features

Live Demo

What it looks like in practice

ready

Install

Pick your client

~/Library/Application Support/Claude/claude_desktop_config.json  · Windows: %APPDATA%\Claude\claude_desktop_config.json
{
  "mcpServers": {
    "cmux-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/manaflow-ai/cmux"
      ],
      "_inferred": true
    }
  }
}

Open Claude Desktop → Settings → Developer → Edit Config. Restart after saving.

~/.cursor/mcp.json · .cursor/mcp.json
{
  "mcpServers": {
    "cmux-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/manaflow-ai/cmux"
      ],
      "_inferred": true
    }
  }
}

Cursor uses the same mcpServers schema as Claude Desktop. Project config wins over global.

VS Code → Cline → MCP Servers → Edit
{
  "mcpServers": {
    "cmux-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/manaflow-ai/cmux"
      ],
      "_inferred": true
    }
  }
}

Click the MCP Servers icon in the Cline sidebar, then "Edit Configuration".

~/.codeium/windsurf/mcp_config.json
{
  "mcpServers": {
    "cmux-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/manaflow-ai/cmux"
      ],
      "_inferred": true
    }
  }
}

Same shape as Claude Desktop. Restart Windsurf to pick up changes.

~/.continue/config.json
{
  "mcpServers": [
    {
      "name": "cmux-skill",
      "command": "git",
      "args": [
        "clone",
        "https://github.com/manaflow-ai/cmux"
      ]
    }
  ]
}

Continue uses an array of server objects rather than a map.

~/.config/zed/settings.json
{
  "context_servers": {
    "cmux-skill": {
      "command": {
        "path": "git",
        "args": [
          "clone",
          "https://github.com/manaflow-ai/cmux"
        ]
      }
    }
  }
}

Add to context_servers. Zed hot-reloads on save.

claude mcp add cmux-skill -- git clone https://github.com/manaflow-ai/cmux

One-liner. Verify with claude mcp list. Remove with claude mcp remove.

Use Cases

Real-world ways to use cmux

Run several agent sessions visibly

👤 Claude Code users ⏱ ~15 min intermediate

When to use: You want to watch parallel sessions without alt-tabbing.

Flow
  1. Install
    Build/install cmux on macOS.✓ Copied
    → App ready
  2. Open tabs
    One Claude Code per tab.✓ Copied
    → All visible
  3. Coordinate
    Switch by hotkey.✓ Copied
    → Faster orchestration

Outcome: Less tab fatigue when running parallel agents.

Combinations

Pair with other MCPs for X10 leverage

cmux-skill + stably-orca-skill

cmux for the human view; Orca for the agent merge logic

Combine cmux-skill with stably-orca-skill: cmux for the human view; Orca for the agent merge logic✓ Copied

Tools

What this MCP exposes

ToolInputsWhen to callCost
terminal-app (see docs) Not a callable skill — a host environment 1 call

Cost & Limits

What this costs to run

API quota
N/A
Tokens per call
N/A
Monetary
Free
Tip
Use the keyboard hotkeys; mouse is slower

Security

Permissions, secrets, blast radius

Credential storage: None
Data egress: None

Troubleshooting

Common errors and fixes

Build fails

Requires recent Xcode; check the README minimum

Alternatives

cmux vs others

AlternativeWhen to use it insteadTradeoff
iTerm2 splitsYou're on cross-platformLess vertical-tab friendly

More

Resources

📖 Read the official README on GitHub

🐙 Browse open issues

🔍 Browse all 400+ MCP servers and Skills