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Ghostty-based macOS terminal with vertical tabs and notifications for AI coding agents https://cmux.com
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Lawrence Chen eb7c06ceb1 Fix high CPU usage from notifications and add regression tests 
- Fix auto-updating Text(date, style: .time) causing continuous SwiftUI updates
  by using static formatting with .formatted(date:time:)
- Fix notification popover keeping SwiftUI observers active when closed by
  clearing contentViewController on popover close and recreating on open
- Fix focus loss when notifications arrive while typing by only setting
  focus in NotificationsPage when the page is visible
- Make Update Pill and Update Logs debug-only features
- Add CPU regression tests: test_cpu_usage.py, test_cpu_notifications.py
- Add lint test for auto-updating Text patterns: test_lint_swiftui_patterns.py
2026-01-29 17:02:16 -08:00
.github/workflows Fix update-homebrew workflow 2026-01-29 04:31:39 -08:00
Assets.xcassets Add dev build branding and reload scripts 2026-01-28 01:20:48 -08:00
CLI Add cmuxterm CLI and socket control modes 2026-01-28 21:19:48 -08:00
docs Document Ghostty fork changes 2026-01-28 23:19:17 -08:00
docs-site Add documentation site and Homebrew installation 2026-01-29 04:41:39 -08:00
ghostty@4713b7e236 Update ghostty submodule workflow 2026-01-28 22:35:28 -08:00
GhosttyTabs.xcodeproj Add Sentry SDK for crash reporting 2026-01-29 16:09:47 -08:00
GhosttyTabsUITests Add cmuxterm CLI and socket control modes 2026-01-28 21:19:48 -08:00
homebrew-cmuxterm@c12d753824 Add homebrew-cmuxterm as submodule 2026-01-29 04:44:31 -08:00
Resources/ghostty/terminfo/78 Add cmuxterm CLI and socket control modes 2026-01-28 21:19:48 -08:00
scripts Add cmuxterm CLI and socket control modes 2026-01-28 21:19:48 -08:00
Sources Fix high CPU usage from notifications and add regression tests 2026-01-29 17:02:16 -08:00
tests Fix high CPU usage from notifications and add regression tests 2026-01-29 17:02:16 -08:00
.gitignore Add homebrew-cmuxterm as submodule 2026-01-29 04:44:31 -08:00
.gitmodules Add homebrew-cmuxterm as submodule 2026-01-29 04:44:31 -08:00
AGENTS.md agents 2026-01-22 03:18:02 -08:00
CLAUDE.md Handle Sparkle updater cache and bump version 2026-01-28 23:30:59 -08:00
cmux-Bridging-Header.h Rename to cmux and add About panel 2026-01-26 03:05:03 -08:00
ghostty.h Initial commit: macOS terminal app with vertical tabs using libghostty 2026-01-22 01:16:24 -08:00
Package.resolved Initial commit: macOS terminal app with vertical tabs using libghostty 2026-01-22 01:16:24 -08:00
Package.swift Rename to cmux and add About panel 2026-01-26 03:05:03 -08:00
README.md Add documentation site and Homebrew installation 2026-01-29 04:41:39 -08:00

README.md

cmuxterm

A lightweight native macOS terminal with vertical tabs and notifications for AI coding agents

Download cmuxterm for macOS

Features

  • Native macOS app — Built with Swift and AppKit, not Electron. Fast startup, low memory.
  • Vertical tabs — See all your terminals at a glance in a sidebar
  • Notification panel — Tabs flash when AI agents (Claude Code, Codex) need your attention
  • Lightweight — Small binary, minimal resource footprint. No bundled browser engine.
  • GPU-accelerated — Powered by libghostty for smooth rendering

Install

Homebrew:

brew tap manaflow-ai/cmuxterm
brew install --cask cmuxterm

Or download the DMG directly.

Why cmuxterm?

Running multiple AI coding agents? cmuxterm helps you manage them. Instead of losing track of which terminal needs input, the notification panel shows you exactly where to look.

A native macOS app means it launches instantly, uses minimal RAM, and feels right at home on your Mac.