cmux, native macos terminal for ai coding agents
About cmux
cmux is a free, open-source native macOS terminal built on libghostty (Ghostty rendering engine) with vertical tabs, split panes, notification rings, and a built-in scriptable browser, designed for managing multiple parallel AI coding agents like Claude Code, Codex, and Gemini CLI.
Key Capabilities
Native macOS terminal (Swift + AppKit) with GPU-accelerated rendering via libghostty
Vertical tabs showing git branch, PR status, ports, and notification text per workspace
Built-in scriptable browser for previewing and automating web interactions alongside terminal
Notification rings alert you when any agent needs attention across parallel sessions
Works with Claude Code, Codex, OpenCode, Gemini CLI, Kiro, Aider, and any CLI tool
Standout Features
Vertical Tabs
Sidebar shows git branch, PR status, working directory, ports, and latest notification for each workspace.
Notification Rings
Panes highlight when agents need attention, supports OSC 9/99/777 and cmux notify CLI.
Built-in Browser
Scriptable browser surface next to terminal, open URLs, take snapshots, click elements, fill forms via CLI.
GPU Rendering
Powered by libghostty for fast, native rendering with zero Electron overhead.
Full CLI & Socket API
Automate everything via cmux CLI commands and socket API for agent hook integration.
Perfect for
Compare cmux
Community Buzz
EVERY TOOL VIBE-CODERS SHOULD KNOW ABOUT: @claudeai for coding + debugging, @cursor_ai as AI code editor, @Replit for cloud coding + deployment.
Claude for coding ($20/mo), Supabase for backend (Free), Vercel for deploying (Free), Stripe for payments. The full vibe coder stack for under $35/mo.
The entire AI coding industry just got exposed. Someone leaked the system architecture of every major tool, 30,000+ lines of hidden instructions.
Similar Tools to cmux
NTM (Named Tmux Manager)
NTM (Named Tmux Manager) is a free, open-source tool that transforms tmux into a multi-agent command center. Spawn, tile, and coordinate Claude Code, OpenAI Codex, and Gemini CLI agents across named panes with broadcast prompts, a TUI command palette, conflict tracking, context monitoring, and persistent sessions that survive SSH disconnections.
Hermes Agent
Self-hosted autonomous agent from Nous Research with a built-in learning loop. Creates skills from experience, persists memory across sessions, and runs 24/7 on your own hardware with sandboxed terminals and messaging-app gateways.
Google AntiGravity
Google's agentic development platform, now split across four surfaces: the Antigravity IDE (VS Code fork), Antigravity 2.0 standalone desktop, the Go-based Antigravity CLI, and a Python SDK for custom agents.
Aider
Top-tier command line AI tool. Lets you pair program with LLMs (Claude 3.5, GPT-4o) directly in your git repo. Edits multiple files effectively.
Spec Kit
Open-source toolkit for Spec-Driven Development: scaffold specs, plans, and tasks in your repo, then run agent commands to implement changes with the AI tool you prefer.
OpenAI Codex CLI
The official command-line vibe coding tool from OpenAI. Edits local files, understands your repo, and runs shell commands with your permission. Like Aider, but built by OpenAI.
Related Articles
ready to try cmux?
join thousands of developers already using cmux.
try cmux now