Isomux - Give your agents a cute office

Feature Highlights

free · open source · no account needed

Mix Claude and Codex agents in the same office
Works with your subscriptions: if claude or codex works in your terminal, isomux works in your browser

Agents check on each other and message each other: all messages (human and agent) get queued while agents are busy
Shared task board: humans and agents can create, assign, claim, and close tasks
Hierarchical system prompts: office-wide, per-room, and per-agent prompts
Custom commands in addition to your own: /pair-programming, /peer-review, etc.

Collaborate in agent conversations: anyone you've invited to your office can chime in
Live user presence: other users (and your other devices) appear as small ghosts next to the agent they're talking to
Invite-link access: owner mints a URL per device, sends it out-of-band, the invitee clicks and is signed in. No accounts, no passwords

Run on localhost:4000 for local use, or as a self-hosted persistent server reachable from any device (see how)
Mobile UI: continue on your phone with a touch-optimized UI
Real-time updates: same conversations, same filesystem, no syncing headaches between devices

Visual office: see what every agent is doing at a glance
Animated characters: sleeping when idle, typing when working, waving when waiting for you
Skeuomorphic touches: click the moon to toggle dark mode, click doors to switch rooms, etc.
6 color themes
Auto-generated topic below each nametag, so you remember what each agent is working on

Built-in terminal, editor, and diff tool
Voice-to-text prompting and text-to-speech responses
Cron jobs: schedule recurring agent runs; each run is a fresh chat (that can be resumed)
Image/PDF attachments: agents understand images and PDFs and can show images inline
Conversation branching: edit any past message to fork the conversation
Notifications: get pinged (and waved at) when an agent finishes
Pre-tool-call safety hooks
Plugin system: add memory, audit, or other turn-aware behavior. Reference mem0 plugin gives agents long-term memory across sessions.

Isomux is in alpha. Bug reports welcome.

You need Bun (v1.2+) and a subscription for at least one provider.

curl -fsSL https://bun.sh/install | bash

Open a new shell (or source ~/.bashrc) after this so bun lands on PATH.

git clone https://github.com/nmamano/isomux.git
cd isomux
bun install
bun run dev

Visit http://localhost:4000 in your browser.

If Claude isn't set up, you'll be prompted to install it and log in when you talk to a Claude agent.
Codex is bundled with isomux. You'll be prompted to log in when you talk to a Codex agent.

Want to run it on an always-on box, access from every device, and invite other users to your office? See self-hosted setup.