Manaflow

cmux is the open-source terminal built for coding agents. Built by @lawrencecchen @austinywang

[David Ondrej @DavidOndrej1]

> pi orchestrator
> codex cli executor

> opus 4.8 in pi
> gpt 5.5 high in codex

> you only talk to Pi
> codex does all the work

> Pi monitors codex in cmux pane
> optimal tokens, clear responses

[David Ondrej @DavidOndrej1]

cmux is the shit

stop using regular terminal

times have changed.

in 2026, you be running 20 agents across different cmux workspaces

[Lawrence Chen @lawrencecchen]

Introducing cmux history:

cmux now has support for reopening closed terminals/browsers/workspaces via ⌘+Shift+T

History also supports reopening closed Claude Code/Codex/OpenCode/etc sessions

You can also jump back and forward through recently focused workspaces/terminals with the navigation buttons or ⌘+[ and ⌘+] (similar to a browser)

Run `cmux hooks setup` once

Out in 0.64.11

[Elliot Arledge @elliotarledge]

Timelapse #146 (16 hrs)
- Recording on new dii osmo action 4
- Built my second pc, flashed cashyOS + windows 11, and installed my favourite games
- Switched to cmux
- Setting up computer use from terminal
- Decided to take time for myself and watched the walking dead and played some valorant. Didn’t want to get addicted like I used to be so I wrapped it up quickly (insta-lock Reyna dopamine)

[Ajey Gore @AjeyGore]

this is fantastic https://t.co/QZ0U4kBaAu

[Theo - t3.gg @theo]

@shadcn I rotate between Ghostty and Cmux (based on Ghostty)

I think you'd like Cmux a lot. Both perform great and I don't think there's much reason to stay on iterm nowadays

[J J @jturntdev]

Codex CLI is superior over the Codex App.

But as we all know there are some limitations.

Until now.

If you aren’t using Cmux your NGMI.

-Browser capabilities
- Easier co-ordination / management
- Performance

You get best of both worlds.

Codex Cli with Codex App UX.

[David Ondrej @DavidOndrej1]

cmux is insane

start using it today

else you'll fall behind

[Shann³ @shannholmberg]

if you're running multiple agents, you need a terminal multiplexer

I currently use CMUX, it's ghostyy's variant of TMUX, a terminal multiplexer that lets you split your terminal into multiple panes and windows, all inside a single session

instead of juggling separate terminal windows or being locked into one native app like Codex or Claude, you get:

> unlimited horizontal and vertical split panes in one window
> multiple tabs you can switch between instantly
> persistent sessions that survive disconnects
> notifications when any agent needs input
> model-agnostic setup, you can run GPT in one pane, Claude in another, local models in a third

I currently work like this:

> One big window with Hermes Orchestrator on the left
> Multiple open specialised agents on the right
> Agent Control Room session at the bottom

all in one view, zero alt-tabbing between apps

keeping full project context visible at all times

when I'm deep in a project and an agent surfaces something that needs attention, I can see it immediately without breaking focus. when one agent finishes and another needs input, the notification pops in-window.

before CMUX I was constantly switching between terminal windows, losing context, forgetting what was running where

the biggest productivity killer for me is context switching between projects.

CMUX doesn't fix that, but it eliminates context switching within a project, which compounds fast when you're running multiple agents.

[Elliot Arledge @elliotarledge]

first impressions switching from codex app / claude desktop to cmux:
> the tab management is phenomenal
> low resource usage (swift)
> can import browser settings and use emails, x, and order stuff from amazon all within one app
> finally got claude and codex computer use figured out so now i have clickers running from one app
> cmux.json makes a lot of sense (unified settings file)
> tabs re-open in the best way you could ask for, although i would want support for restoring my sessions, even if it means clicking ctrl+c in the terminals, copying the --resume text in some state file and repasting when the app reopens (good for updates or when i have to close and reopen due to cmux permission changes)
> i still get the terminal
> better than pinned + project sidebar in codex app since i get full control over whats in the sidebar (more ui control = better)
> i did like the natural web ui text rendering instead of raw markdown in the claude and codex apps. but i know its hard to get that when codex cli and claude code are designed entirely around the terminal
> very high taste + free
> was hesitant at first as its takes time to learn new things but i think im okay committing to this

[amrit @amritwt]

If you are an agentic engineer then shift to cmux asap

[Haoshan Hong @haoshanhong]

学cs的同学给我推荐了cmux作为终端，确实比ghostty更干净好用，很适合在这里用claude code

[Max Katz @maxktz]

nothing beats my `cmux` + `hitch` workflow...

[Aziz Albahar @al_bahar_la]

hey all, i recently joined @manaflowai to work with @lawrencecchen and @austinywang on https://t.co/Ada3cvHb5W .

with that, consider me an extra communication channel for cmux 😆

[Harnoor Singh @iHarnoorSingh]

used only Cmux for the whole week! Love it!!

[David Ondrej @DavidOndrej1]

> learn cmux
> trust me

[Manaflow @manaflowai]

@KingBootoshi You should try https://t.co/uv8qTb2jIt

[Harnoor Singh @iHarnoorSingh]

vertical tabs everything with cmux that uses Ghostty

[Manaflow @manaflowai]

@amecha_ai @lexoj I’m looking into this to support kilo cli!

[Manaflow @manaflowai]

@StarHistoryHQ Free & open-source (GPL)

https://t.co/ulcPFWgqM4