cmux: Ghostty-Based macOS Terminal for AI Coding Agents

Repositorymanaflow-ai/cmuxTool

cmux is an open source macOS terminal multiplexer based on Ghostty, designed specifically for multitasking with AI coding agents. It features vertical tabs, workspace metadata, and visual notifications when agents require human attention.

Key points

  1. Built on top of the Ghostty terminal and written in native Swift for macOS.
  2. Notification rings and tab highlights signal when background coding agents need input or intervention.
  3. Central notification panel aggregates pending agent alerts and allows quick navigation to active prompts.
  4. Built-in split browser equipped with a scriptable API ported from agent-browser.
  5. Sidebar displays Git branches, linked PR statuses, listening ports, working directories, and notification snippets.

Why it matters

Running multiple autonomous or interactive CLI coding agents simultaneously often results in chaotic terminal sessions and missed prompts. cmux solves this orchestration challenge by turning the terminal into an organized workspace with proactive status tracking.

Analysis

cmux is designed for engineers running multiple AI coding tools (such as Claude Code, Codex, or Gemini) in parallel. By combining Ghostty's core terminal capabilities with Swift-based UI conveniences and browser automation hooks, it offers an agent-centric alternative to traditional tmux setups. With more than 26,000 GitHub stars and downloadable releases, it exhibits strong adoption and maturity.

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Summary generated by AI (Gemini 3.8 Flash, 27 September 2026). It may contain errors – the original source is authoritative.

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