wmux Review 2026: The Workspace Multiplexer for Running Fleets of AI Agents

Running one coding agent is easy. Running six is chaos — six terminals, six branches, no idea which one is blocked waiting for your approval, and everything gone the moment your laptop reboots. wmux is built for exactly that problem.

Its own pitch is the clearest description: tmux splits a terminal, wmux multiplexes whole workspaces.

What is wmux?

wmux is a desktop workspace multiplexer for AI coding agents, native on Windows and macOS with experimental Linux builds. A daemon owns every PTY, so terminals, agents, git worktrees, an integrated browser and the channels they coordinate over all keep running across quits, crashes, and full OS reboots.

The practical shape of it: Claude on the left pane, Codex on the right, Gemini running tests below — all in one window, all supervised, all resumable.

Key features

• Task fan-out and harvest — send one prompt to up to 8 tasks, each in an isolated git worktree with its own agent pane and private mission channel. Review the diffs side by side, tick the individual hunks you want across files, and adopt them in a single all-or-nothing git apply. Then close the task or open a PR in one click.
• Git and GitHub in the dock — a Git tab showing worktrees plus pull requests and comments (GitHub via gh, GitLab via glab, self-hosted included). Read-only workspace diff from the command palette, and from any hunk you can ask the orchestrator with the code attached.
• Agents that coordinate — agent-to-agent messaging and task delegation, plus Slack-style channels with server-verified senders and durable per-agent inboxes.
• Execute approval gate — no agent runs code in your workspace without your OK, and dangerous commands like rm -rf or git push --force get flagged for approval.
• Fleet View cockpit — Ctrl+Shift+A shows every agent across every workspace in an always-on side panel, with blocked ones floated to the top and one inbox to clear every stuck approval.
• Survives reboot — a pane declared in wmux.json is supervised like an init system: restarted across crashes and reboots, resuming the exact agent conversation it was on.
• Zero-config MCP — 86 tools register themselves, scoped to the calling workspace, plus an integrated Chrome-over-CDP browser your agents can click and type in.

Who should use it?

wmux earns its complexity when you’re genuinely running multiple agents at once on real work. The fan-out-and-harvest loop — one prompt, N attempts, cherry-pick the best hunks — is the feature that has no clean equivalent elsewhere, and it’s the reason to install it.

If you run a single agent in a single terminal, you don’t need this. Claude Code or Cursor alone will serve you better, with far less surface area to learn.

Worth pairing with: Claude Code Merge Queue if your parallel agents all need to land on the same branch, and peek-cli if you want agents to see rendered frontend output.

How it compares

Against tmux, the difference is scope. tmux gives you panes and persistence for shells. wmux adds agent-awareness on top — it knows a Claude Code session from a Codex CLI session, monitors activity, gates dangerous commands, and can resume a conversation, not just a shell.

Against running agents in your IDE, wmux trades editing for orchestration. It deliberately doesn’t creep into being an IDE — the workspace diff is read-only. It’s the control plane, not the editor.

Pros and cons

Pros: genuine multi-agent orchestration with fan-out and per-hunk adoption; approval gates for safety; survives crashes and reboots; git and PR surface built in; zero-config MCP with 86 tools; integrated browser; MIT licensed and actively developed.

Cons: an Electron desktop app, so heavier than a terminal multiplexer; Linux support is experimental and macOS is Apple Silicon only; the Windows installer uses a test certificate, so SmartScreen warns unless you install via winget or choco; big feature surface means a real learning curve; Chinese and Japanese localization are still in progress.

Pricing

Free and open source under MIT. Install with winget install openwong2kim.wmux on Windows, or the signed and notarized .dmg on macOS.

FAQ

Which agents does it detect? Claude Code, Codex CLI, Gemini CLI, Aider, OpenCode, and GitHub Copilot CLI. Detection activates monitoring and critical-action warnings automatically.

Does it really survive a reboot? Yes — panes declared in wmux.json are supervised by the daemon, the app relaunches at login, and a recovered pane offers a one-click Resume back into the exact conversation.

Can I use it on Linux? Experimental AppImage, .deb and .rpm builds exist on the releases page, but Windows and macOS are the supported platforms.

Is my code sent anywhere? wmux itself is a local desktop app — the agents you run inside it have whatever network access they normally would. The wmux web phone view is read-only and loopback-only by default.