by manaflow-ai
Open source Ghostty-based macOS terminal with vertical tabs and notifications for AI coding agents. Built for multitasking, organization, and programmability.
# Add to your Claude Code skills
git clone https://github.com/manaflow-ai/cmuxLast scanned: 4/17/2026
{
"issues": [
{
"type": "npm-audit",
"message": "@tootallnate/once: @tootallnate/once vulnerable to Incorrect Control Flow Scoping",
"severity": "low"
},
{
"type": "npm-audit",
"message": "@vercel/backends: Vulnerability found",
"severity": "high"
},
{
"type": "npm-audit",
"message": "@vercel/build-utils: Vulnerability found",
"severity": "high"
},
{
"type": "npm-audit",
"message": "@vercel/cervel: Vulnerability found",
"severity": "high"
},
{
"type": "npm-audit",
"message": "@vercel/elysia: Vulnerability found",
"severity": "high"
},
{
"type": "npm-audit",
"message": "@vercel/express: Vulnerability found",
"severity": "high"
},
{
"type": "npm-audit",
"message": "@vercel/fastify: Vulnerability found",
"severity": "high"
},
{
"type": "npm-audit",
"message": "@vercel/fun: Vulnerability found",
"severity": "high"
},
{
"type": "npm-audit",
"message": "@vercel/gatsby-plugin-vercel-builder: Vulnerability found",
"severity": "high"
},
{
"type": "npm-audit",
"message": "@vercel/h3: Vulnerability found",
"severity": "high"
},
{
"type": "npm-audit",
"message": "@vercel/hono: Vulnerability found",
"severity": "high"
},
{
"type": "npm-audit",
"message": "@vercel/hydrogen: Vulnerability found",
"severity": "medium"
},
{
"type": "npm-audit",
"message": "@vercel/koa: Vulnerability found",
"severity": "high"
},
{
"type": "npm-audit",
"message": "@vercel/nestjs: Vulnerability found",
"severity": "high"
},
{
"type": "npm-audit",
"message": "@vercel/node: Vulnerability found",
"severity": "high"
},
{
"type": "npm-audit",
"message": "@vercel/python: Vulnerability found",
"severity": "high"
},
{
"type": "npm-audit",
"message": "@vercel/python-analysis: Vulnerability found",
"severity": "high"
},
{
"type": "npm-audit",
"message": "@vercel/redwood: Vulnerability found",
"severity": "medium"
},
{
"type": "npm-audit",
"message": "@vercel/remix-builder: Vulnerability found",
"severity": "high"
},
{
"type": "npm-audit",
"message": "@vercel/rust: Vulnerability found",
"severity": "medium"
},
{
"type": "npm-audit",
"message": "@vercel/static-build: Vulnerability found",
"severity": "high"
},
{
"type": "npm-audit",
"message": "@vercel/static-config: Vulnerability found",
"severity": "medium"
},
{
"type": "npm-audit",
"message": "ajv: ajv has ReDoS when using `$data` option",
"severity": "medium"
},
{
"type": "npm-audit",
"message": "minimatch: minimatch has a ReDoS via repeated wildcards with non-matching literal in pattern",
"severity": "high"
},
{
"type": "npm-audit",
"message": "path-to-regexp: path-to-regexp outputs backtracking regular expressions",
"severity": "high"
},
{
"type": "npm-audit",
"message": "smol-toml: smol-toml: Denial of Service via TOML documents containing thousands of consecutive commented lines",
"severity": "medium"
},
{
"type": "npm-audit",
"message": "srvx: srvx is vulnerable to middleware bypass via absolute URI in request line ",
"severity": "medium"
},
{
"type": "npm-audit",
"message": "tar: Arbitrary File Read/Write via Hardlink Target Escape Through Symlink Chain in node-tar Extraction",
"severity": "high"
},
{
"type": "npm-audit",
"message": "undici: Use of Insufficiently Random Values in undici",
"severity": "high"
},
{
"type": "npm-audit",
"message": "vercel: Vulnerability found",
"severity": "high"
}
],
"status": "WARNING",
"scannedAt": "2026-04-17T06:04:24.023Z",
"semgrepRan": false,
"npmAuditRan": true,
"pipAuditRan": true
}See how cmux compares with popular alternatives.
cmux is an open-source ai agents skill for AI coding assistants such as Claude Code, Codex CLI, and ChatGPT, built by manaflow-ai. Open source Ghostty-based macOS terminal with vertical tabs and notifications for AI coding agents. Built for multitasking, organization, and programmability. It has 28,048 GitHub stars.
cmux returned warnings in SkillsLLM's automated security scan. It has no critical vulnerabilities, but review the flagged issues in the Security Report section before adding it to your workflow.
Clone the repository with "git clone https://github.com/manaflow-ai/cmux" and add it to your Claude Code skills directory (see the Installation section above).
cmux is primarily written in Swift. It is open-source under manaflow-ai on GitHub, so you can review or fork the full source.
Yes. SkillsLLM lists many other AI Agents skills you can browse and compare side by side. Open the AI Agents category from the badge at the top of this page, or use the Related Skills and comparison links further down to weigh cmux against similar tools.
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⚠️ Third-Party Software Notice
This skill is third-party open-source software developed and hosted independently on GitHub. SkillsLLM is an informational directory and does not control or maintain the underlying repository.
Any security checks, ratings, or warnings displayed by SkillsLLM are automated and limited in scope. They do not constitute a security certification or guarantee that the software is safe, error-free, or free from malicious code, vulnerabilities, compromised dependencies, or prompt-injection risks.
Review the source code, permissions, dependencies, and configuration before installing or running any third-party skill. Use is at your own risk. To the maximum extent permitted by applicable law, SkillsLLM is not liable for losses arising from third-party software.
cmux.json that launch from the command palette~/.config/ghostty/config for themes, fonts, and colorsOpen the .dmg and drag cmux to your Applications folder. cmux auto-updates via Sparkle, so you only need to download once.
brew tap manaflow-ai/cmux
brew install --cask cmux
To update later:
brew upgrade --cask cmux
On first launch, macOS may ask you to confirm opening an app from an identified developer. Click Open to proceed.
I run a lot of Claude Code and Codex sessions in parallel. I was using Ghostty with a bunch of split panes, and relying on native macOS notifications to know when an agent needed me. But Claude Code's notification body is always just "Claude is waiting for your input" with no context, and with enough tabs open I couldn't even read the titles anymore.
I tried a few coding orchestrators but most of them were Electron/Tauri apps and the performance bugged me. I also just prefer the terminal since GUI orchestrators lock you into their workflow. So I built cmux as a native macOS app in Swift/AppKit. It uses libghostty for terminal rendering and reads your existing Ghostty config for themes, fonts, and colors.
The main additions are the sidebar and notification system. The sidebar has vertical tabs that show git branch, linked PR status/number, working directory, listening ports, and the latest notification text for each workspace. The notification system picks up terminal sequences (OSC 9/99/777) and has a CLI (cmux notify) you can wire into agent hooks for Claude Code, OpenCode, etc. When an agent is waiting, its pane gets a blue ring and the tab lights up in the sidebar, so I can tell which one needs me across splits and tabs. Cmd+Shift+U jumps to the most recent unread.
The in-app browser has a scriptable API ported from agent-browser. Agents can snapshot the accessibility tree, get element refs, click, fill forms, and evaluate JS. You can split a browser pane next to your terminal and have Claude Code interact with your dev server directly.
Everything is scriptable through the CLI and socket API — create workspaces/tabs, split panes, send keystrokes, open URLs in the browser.
cmux is not prescriptive about how developers hold their tools. It's a terminal and browser with a CLI, and the rest is up to you.
cmux is a primitive, not a solution. It gives you a terminal, a browser, notifications, workspaces, splits, tabs, and a CLI to control all of it. cmux doesn't force you into an opinionated way to use coding agents. What you build with the primitives is yours.
The best developers have always built their own tools. Nobody has figured out the best way to work with agents yet, and the teams building closed products definitely haven't either. The developers closest to their own codebases will figure it out first.
Give a million developers composable primitives and they'll collectively find the most efficient workflows faster than any product team could design top-down.
For more info on how to configure cmux, head over to our docs.
To theme cmux (colors, fonts, transparency, sidebar, and more), see Customizing cmux's look.
For shell watcher churn and managed-Mac process audit volume, see the supported
CMUX_NO_GIT_WATCH=1 mitigation and its Git/PR update trade-offs.
| Shortcut | Action |
|---|---|
| ⌘ N | New workspace |
| ⌘ 1–8 | Jump to workspace 1–8 |
| ⌘ 9 | Jump to last workspace |
| ⌃ ⌘ ] | Next workspace |
| ⌃ ⌘ [ | Previous workspace |
| ⌘ ⇧ W | Close workspace |
| ⌘ ⇧ R | Rename workspace |
| ⌥ ⌘ E | Edit workspace description |
| ⌘ B | Toggle sidebar |
| ⌥ ⌘ B | Toggle right sidebar |
| ⌘ ⇧ E | Toggle right sidebar focus |
| Shortcut | Action |
|---|---|
| ⌘ T | New surface |
| ⌘ ⇧ ] | Next surface |
| ⌘ ⇧ [ | Previous surface |
| ⌃ Tab | Next surface |
| ⌃ ⇧ Tab | Previous surface |
| ⌃ 1–8 | Jump to surface 1–8 |
| ⌃ 9 | Jump to last surface |
| ⌘ W | Close surface |
| Shortcut | Action |
|---|---|
| ⌘ D | Split right |
| ⌘ ⇧ D | Split down |
| ⌥ ⌘ ← → ↑ ↓ | Focus pane directionally |
| ⌃ ⇧ H J K L | Resize pane left/down/up/right |
| ⌘ ⇧ H | Flash focused panel |
Browser developer-tool shortcuts follow Safari defaults and are customizable in Settings → Keyboard Shortcuts.
Command palette navigation shortcuts, including ⌃ P, are also customizable and can be cleared so the keypress reaches the active terminal.
| Shortcut | Action |
|---|---|
| ⌘ ⇧ L | Open browser in split |
| ⌘ L |