One window for the whole fleet: terminals, agents, git worktrees, a real browser, and the channels they coordinate over.
Every agent you add costs another window, another terminal, another thing to check. wmux makes the workspace — not the terminal — the unit you multiplex.
tmux splits a terminal. wmux multiplexes whole workspaces — terminals, agents, git worktrees, a browser, and the channels they coordinate over — all owned by a daemon that keeps them running across quits, crashes, and full reboots. One window. One fleet. Windows & macOS.
What you get
Fan a task out to as many as eight git worktrees, each with its own agent and its own branch. Compare the results side by side, harvest the changes you want hunk by hunk — all-or-nothing, never a half-applied diff — and open the pull request in one click.
The orchestrator hands roles to sub-agents, and Fleet View (Ctrl+Shift+A) puts every pane on one screen. One-click loops pick a skill from your .claude directory and keep running it against a done-when checklist until the box is actually ticked.
Slack-style channels carry humans and agents in the same workspace, and A2A task messages let panes hand work to each other directly. Threads, missions and unread state are stored by the daemon, so a reboot does not erase the conversation.
The daemon owns your sessions, not the window. Panes declared in wmux.json are supervised the way an init system supervises services: restarted when they die, restored when you come back, with up to 999K lines of scrollback intact.
Not a screenshot and not a headless approximation: agents drive an actual Chrome tab through the DevTools Protocol, including React-controlled inputs and CJK composition, while you watch the same page and take over whenever you want.
Agents are fast and occasionally wrong. wmux flags the irreversible commands before they run and keeps the local surface small.
rm -rf, git push --force and DROP TABLE are flagged for approval instead of running silently.
wmux web serves your terminals to a phone browser over loopback, read-only; exposing it is an explicit, warned-about choice.
Every MCP call carries a per-session token and only reaches the workspace it came from.
No analytics, no account, no phone-home. The daemon talks to your machine and nothing else.
Recorded from a real session: one prompt turns into delegated work running across panes.
Keep Claude in one pane and the diff, the tests and the PR in the others — same workspace, same working directory, no window juggling.
Claude refactors in pane A, pane B watches the test run, the Git tab opens the PR. One window, one keyboard.
Run Claude Code, Codex and Gemini CLI at once, give each a role, and let the orchestrator route work between them through channels and A2A messages.
The orchestrator delegates the migration to three sub-agents, then holds a loop open until the done-when checklist is green.
Send the same prompt down eight isolated worktrees, read the results side by side, and keep only the hunks that deserve to land.
Eight branches, one prompt, one review pass. The best hunks get harvested; the rest of the worktrees are thrown away.
Let an agent click through a real Chrome tab — your dashboard, your CI, your own app — while you watch the same page and take over when needed.
An agent walks the release checklist in the browser, files what it finds in a channel, and stops at the approval gate before anything destructive.
MCP tools
wmux registers its MCP server with the agents on your machine the first time it runs. No JSON editing, no copy-paste, and every call is scoped to the workspace it came from.
browser_open
Open a page in a real Chrome tab attached over CDP.
browser_click
Click an element on the live page.
browser_extract_text
Pull readable text out of the current page.
browser_screenshot
Capture the page or a single element.
channel_post
Post a message into a workspace channel.
channel_read
Read a channel, including what arrived while you were away.
channel_unread
Check what an agent has not caught up on yet.
a2a_task_send
Hand a task to another agent and track it.
a2a_discover
List the agents in the workspace and their skills.
company_a2a_send
Send a message across workspaces on the same machine.
pane_split
Split a pane and start something in it.
pane_list
List panes with their agent, cwd and status.
terminal_read
Read what a terminal is showing right now.
terminal_send
Type into a terminal, verbatim.
surface_new
Open a new surface — terminal, browser or editor.
deck_ask_decision
Ask the human to decide, and wait for the answer.
wmux_search_panes
Search scrollback across every pane at once.
workspace_list
List workspaces the daemon is currently keeping alive.
Detected agents: Claude Code · Codex CLI · Gemini CLI · Aider · OpenCode · GitHub Copilot CLI
Install
Windows 10 (1903+) or macOS on Apple Silicon · no admin rights · no account · no telemetry
Tmux prefix mode covers 13 actions, so the muscle memory carries over.
┌──────────────────────────────────────────────────────────────┐ │ wmux window · Electron renderer · React + xterm.js │ │ ── panes · tabs · Fleet View · Git tab · browser surface │ ├──────────────────────────────────────────────────────────────┤ │ daemon · owns every session, outlives the window │ │ ── PTY pool (ConPTY on Windows, forkpty on macOS) │ │ ── wmux.json pane supervision ── scrollback up to 999K │ │ ── channels · A2A bus · worktree tasks │ ├──────────────────────────────────────────────────────────────┤ │ mcp host · 84 tools, registered on first run │ │ ── workspace-scoped tokens ── execute approval gate │ ├──────────────────────────────────────────────────────────────┤ │ agents · claude code · codex · gemini · aider · … │ └──────────────────────────────────────────────────────────────┘ # Each agent runs in its own PTY. wmux owns the lifecycle, not the agent. # 8-pane echo latency: p50 4.6 ms, measured in CI. # wmux web binds to loopback; exposing it to the network is opt-in.
Compare
| wmux | tmux | Windows Terminal · iTerm2 | VS Code terminal | Agent managers | |
|---|---|---|---|---|---|
| Split panes | ✓ | ✓ | ✓ | ✓ | partial |
| Session persistence | ✓ | ✓ | ✕ | partial | partial |
| Survives a full reboot | ✓ | ✕ | ✕ | partial | partial |
| Git worktree fan-out | ✓ | ✕ | ✕ | ✕ | ✓ |
| Orchestrator & Fleet View | ✓ | ✕ | ✕ | ✕ | partial |
| Approval gates for destructive commands | ✓ | ✕ | ✕ | ✕ | partial |
| Channels & agent-to-agent messaging | ✓ | ✕ | ✕ | ✕ | ✕ |
| Real browser automation | ✓ | ✕ | ✕ | ✕ | ✕ |
| MCP tools, auto-registered | ✓ | ✕ | ✕ | ✕ | partial |
| Open source · MIT | ✓ | ✓ | partial | partial | partial |