cmux - Ghostty-based terminal with vertical tabs and notifications
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…
cmux - Ghostty-based terminal with vertical tabs and notifications launched on February 19, 2026 with 198 votes, #147 of 16,627 launches that month and more than 99% of that year's launches.
In plain words
cmux is a macOS terminal application built on Ghostty that manages multiple parallel AI agent sessions. It features vertical tabs displaying git branch, working directory, and listening ports, plus a notification system that shows contextual information about when agents need input. Designed for developers running multiple Claude Code and Codex sessions simultaneously, cmux prioritizes native performance and terminal-based workflows over GUI-based orchestrators.
written from the facts on this page · September 2026
From the sources
cmux is the open-source terminal built for multitasking with coding agents. It has vertical tabs, notifications, a built-in browser, and it's built on Ghostty. When Claude Code needs you, the pane glows blue and the sidebar tells you why. No Electron/Tauri. Just Swift/Appkit.
Open source Ghostty-based macOS terminal with vertical tabs and notifications for AI coding agents. Built for multitasking, organization, and programmability. - manaflow-ai/cmux
In the maker’s words, at launch
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…
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Cmux – Coding Agent Multiplexer2025 · github.com · ▲22HN, I'm stoked to share this product I've been working on non-stop for the past few weeks. It's an immersive GUI experience for working with many coding agents in parallel. The UX should be familiar to Claude Code users, but we took advantage of the GUI nature to add in a bunch more. cmux is early but certainly usable—almost all of our internal cmux development rolls through cmux itself. Please let me know your thoughts and feedback!
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Rmux – A programmable terminal multiplexer with a Playwright-style SDKMay 2026 · github.com · ▲194Author here. RMUX started from a frustration: I've used tmux for years and got tired of scraping output with grep and sleeps to automate anything. So I rebuilt the multiplexer from scratch in Rust, with a programmable layer on top. Two surfaces: a tmux-compatible CLI (~90 commands, your keybindings just work), and a typed async Rust SDK on the same daemon — stable pane IDs, structured snapshots, locator-style waits. The idea is Playwright-style automation, but for terminals. Native on Linux, macOS, Windows (real ConPTY, no WSL). Demos and docs at rmux.io. Happy to answer questions about the…
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