Herdr is a terminal multiplexer built for the age of AI agents: a mouse-native workspace where you run many coding agents side by side, watch them all, and keep them alive in the background after you detach. It climbed to roughly 13,000 stars, adding thousands this week, by answering a very 2026 question: once you are running four agents at once, how do you actually manage them? This tutorial gets Herdr installed and a multi-agent workspace open in a few minutes.

  • Herdr is a terminal multiplexer (think tmux) designed around watching multiple AI agents at once.
  • Install is one command on macOS/Linux; a Windows preview and Homebrew, mise and Nix installs exist too.
  • It is mouse-native: click and drag panes, tabs and splits, with a ctrl+b prefix for keyboard users.
  • Detach with agents still running (ctrl+b q), then reattach later, and it can drive remote machines.
One agent per window versus HerdrRunning each AI agent in its own terminal window means constant window-juggling and lost sessions. Herdr puts every agent in one mouse-driven workspace that survives detach. SEPARATE WINDOWSOne agent per windowConstant alt-tabbingLose track of runsClosed window kills it HERDR WORKSPACEAll agents in viewClick panes to switchNamed workspacesDetach, agents live on Herd the whole fleet from one terminal genztech.blog
Fig 4 Running each AI agent in its own terminal window means constant window-juggling and lost sessions. Herdr puts every agent in one mouse-driven workspace that survives detach.

What is Herdr and why now?

Herdr is a terminal multiplexer, the same category as tmux and screen, redesigned for a workflow that barely existed two years ago: running several autonomous coding agents in parallel. Each agent lives in a pane, the panes tile into workspaces and tabs, and a background server keeps everything running even when you close your terminal or lose your SSH connection. The reason it is trending is simple math. As soon as developers started running more than one agent at a time, the old one-terminal-per-task habit fell apart, and Herdr is purpose-built for the many-agents-at-once reality.

RelatedStrix Setup: Run an AI Penetration Tester on Your Code

How do you install and start it?

On macOS or Linux, one command installs it. A Windows preview build and package-manager installs are available too:

# macOS / Linux
curl -fsSL https://herdr.dev/install.sh | sh

# Windows (preview beta)
powershell -ExecutionPolicy Bypass -c "irm https://herdr.dev/install.ps1 | iex"

# or via Homebrew
brew install herdr

Start it by running herdr, which opens or reattaches to a workspace. It is mouse-native, so most navigation is just clicking, but the keyboard prefix is ctrl+b:

herdr
# ctrl+b then v or minus  -> split panes
# ctrl+b then shift+n     -> new workspace
# ctrl+b then q           -> detach (agents keep running)
# ctrl+b then ?           -> show every binding

Run a different agent in each pane, and drive a remote box with herdr --remote ssh://you@server:2222.

How is it different from tmux?

TraitHerdrtmux
Primary inputMouse-nativeKeyboard-first
Built forFleets of AI agentsGeneral shell sessions
Remote sessionsBuilt-in flagVia SSH + config
Learning curveClick to startMemorize bindings

tmux veterans will feel at home with the ctrl+b prefix, but the mouse-first design is what makes Herdr approachable for people who never wanted to memorize a multiplexer.

What are the gotchas?

Two worth flagging. The license shows as non-standard (GitHub reports NOASSERTION), so this is source-available rather than a conventional OSI-approved open-source license; check the terms before you depend on it commercially. And the Windows build is explicitly a preview beta, so the polished experience is on macOS and Linux for now. Neither blocks a developer who wants to try it today, but both matter for a team standardizing on it.

RelatedSet Up OpenAI Codex Inside Claude Code

Do you need Herdr if you already use tmux?

If you are a tmux power user who lives in the terminal and has every binding in muscle memory, Herdr is not going to change your life, and that is fine. Its audience is different. The first group is developers who tried tmux, found the prefix-key model alienating, and gave up: for them, mouse-native panes are the on-ramp that finally makes a multiplexer stick. The second, and the reason it is trending now, is anyone running several AI agents at once, because that workflow specifically rewards seeing every pane at a glance and having each survive a detach. tmux can absolutely do multi-agent supervision with enough config, but Herdr treats it as the default rather than something you assemble. So the honest test is: if your terminal setup already works and you are happy, keep it. If you bounced off tmux, or you are drowning in agent windows, Herdr is built for exactly your problem.

What to watch · 2026
  • Licensing clarity. Whether the project settles on a standard open-source license.
  • Windows maturity. How quickly the preview reaches parity with the Unix builds.
  • Agent integrations. Whether agent tools ship first-class Herdr support.

Our take

Herdr is a tidy example of new tooling growing directly out of a new workflow. Multiplexers are decades old, but nobody built one around the assumption that you are supervising a herd of autonomous agents until that became a daily reality. The mouse-native design is a genuine on-ramp for the many developers who bounced off tmux, and detach-and-survive is exactly right when the thing in the pane is a long-running agent. The license question is the one real asterisk. If you are already running multiple agents and juggling terminal windows to do it, this is worth ten minutes today.

Primary sources

Original analysis by GenZTech. Tool documentation: ogulcancelik/herdr on GitHub.