Herdr: Agent multiplexer that lives in your terminal

Herdr, an open-source terminal-based agent multiplexer, launched version 0.4.0, allowing developers to manage multiple AI agents in workspaces, tabs, and panes directly from the terminal. The tool supports mouse-native interactions, detachable sessions, and integrates with various agents, aiming to replace GUI-based agent managers.

herdr.dev https://herdr.dev · install install · quick start quick-start · supported agents supported-agents · integrations https://herdr.dev/docs/integrations/ · configuration https://herdr.dev/docs/configuration/ · socket api https://herdr.dev/docs/socket-api/ · sponsor sponsors v.0.4.0.mp4 agent multiplexer that lives in your terminal. workspaces, tabs, panes. mouse-native: click, drag, split. every agent at a glance: blocked, working, done. detach and reattach, agents keep running. no gui app, no electron, no mac-only native wrapper. you see the agent's own terminal, not someone's interpretation of it. curl -fsSL https://herdr.dev/install.sh | sh on windows preview beta: powershell -ExecutionPolicy Bypass -c "irm https://herdr.dev/install.ps1 | iex" or install with homebrew: brew install herdr or install with mise: mise use -g herdr if mise reports herdr not found in mise tool registry , update mise and retry. older mise versions predate the herdr registry entry; mise use -g github:ogulcancelik/herdr works as a temporary fallback. or download the stable Linux/macOS binary from releases https://github.com/ogulcancelik/herdr/releases . Native Windows binaries are preview-only beta builds. Start Herdr in the directory where the work lives: herdr Herdr starts or attaches to one background session server. When a session has no workspaces, Herdr opens one automatically. Run an agent in the root pane. Press ctrl+b , then shift+n to create another workspace, ctrl+b , then v or minus to split panes, ctrl+b , then c to create a tab, and ctrl+b , then w to switch workspaces. Press ctrl+b q to detach the client. The server and pane processes keep running. Open another terminal and run herdr again to reattach. Server and client. By default, herdr attaches to a background server. Detaching closes only the client. herdr server stop stops the default server and kills its panes. Named sessions are separate server namespaces: use herdr session attach work , herdr session stop work , and herdr session list when you want fully separate runtime state. Workspaces, tabs, panes. A workspace is the project-level container. Tabs group panes inside a workspace. Panes are real terminal processes, not rewritten agent views. Copy. Herdr copies pane text, not the sidebar. Drag-select inside a pane, double-click a word or token, or press prefix+ for keyboard copy mode. In copy mode, move with h/j/k/l , w/b/e , and { / } , start selection with v or Space, copy with y or Enter, and leave with q or Esc. In PuTTY and some SSH terminals, hold Shift while dragging to use the terminal's own selection, and Shift + right click to paste. Update and restore. herdr update installs a new binary, but a running server keeps using the old process until it is stopped or handed off. Stop the old server to use the new version. Stopping exits pane processes. Run herdr server stop , then run herdr again for the default session. For a named session, run herdr session stop <name , then run herdr session attach <name again. herdr update --handoff is experimental and tries to move live panes, including foreground processes such as dev servers, from the old server to the new one. With current official integrations installed, supported agent panes can restart from their native agent sessions after a server restart or update. Keybindings. Herdr uses explicit keybinding strings. prefix+n means press the configured prefix, then n . ctrl+alt+n , cmd+k , alt+1 , and function-key chords are direct terminal-mode shortcuts and do not need the prefix. Plain direct printable keys such as n steal normal typing, so use prefix+n unless you intentionally want a modifier-gated direct binding. Agent awareness. The sidebar shows blocked, working, done, and idle states. Detection works with process names and terminal output by default. Official integrations can add native session identity for restore, semantic state reports, or both. Herdr notifies you when a new version is available. Run manually: herdr update herdr update is for installs managed by Herdr's own installer. Homebrew, mise, and Nix installs update through brew upgrade herdr , mise upgrade herdr , or your Nix workflow, then use the same stop-and-run-again flow if a session is still running the old server. Linux and macOS direct installs can opt into development preview builds with herdr channel set preview and return to stable with herdr channel set stable . Windows beta installs are preview-only for now. See install docs https://herdr.dev/docs/install/ and session state docs https://herdr.dev/docs/session-state/ for the full update, restart, restore, and handoff matrix. Linux and macOS direct installs use the stable update channel by default. Windows beta installs default to preview. To test preview builds from master before the next stable release: herdr channel set preview To return Linux and macOS direct installs to stable: herdr channel set stable For direct installs, changing channels also checks that channel and installs its latest binary. If that update fails, run herdr update to retry from the configured channel. Preview is only for direct installs managed by Herdr's updater. Homebrew, mise, and Nix stay on stable and update through their package managers. | tmux | gui managers | herdr | | |---|---|---|---| | persistent sessions | ✓ | — | ✓ | | detach / reattach | ✓ | — | ✓ | | panes, tabs, workspaces | ✓ | ✓ | ✓ | | agent awareness | — | ✓ | ✓ | | lives in your terminal | ✓ | — | ✓ | | real terminal views | ✓ | — | ✓ | | mouse-native | — | ✓ | ✓ | | lightweight binary | ✓ | — | ✓ | | agents can orchestrate | ? | ? | ✓ | tmux gives you persistence and panes, but it was built before agents existed. gui managers show agent state, but they make you leave your terminal and use their wrapped view. herdr is persistence and awareness in one tool that stays out of your way. Herdr works over normal SSH. Run it on the remote host, detach, and reattach later: ssh you@yourserver herdr You can also attach from your local terminal without opening a shell first: herdr --remote workbox herdr --remote ssh://you@yourserver:2222 Remote attach adds fallback SSH keepalives by default while preserving your own SSH config. Set remote .manage ssh config = false to use plain ssh . Direct attach connects your current terminal to one server-owned terminal: herdr agent attach <target herdr terminal attach <terminal id See persistence and remote docs https://herdr.dev/docs/persistence-remote/ for remote keybinding, named-session, and handoff details. the sidebar shows which agents are blocked, working, or done. workspaces roll up to their most urgent state so you can scan the full list at a glance. states: - 🔴 blocked — agent needs input or approval - 🟡 working — agent is actively running - 🔵 done — work finished, you have not looked at it yet - 🟢 idle — done and seen detection works by reading foreground process and terminal output. zero config, no hooks required. official claude code, codex, github copilot cli, devin, droid, kimi code cli, qodercli, and cursor agent cli integrations provide session restore identity; pi, omp, kimi code cli, opencode, kilo code cli, hermes, and custom socket integrations can report their own state. not a gui window, not a web dashboard, not electron. herdr runs inside whatever terminal you already use. single rust binary, no dependencies. works inside tmux as the outer terminal environment. workspaces — organized around git repos or folder names, each with its own tabs and panes tabs — first-class in the socket api and cli copy-friendly — drag-select pane text, double-click tokens, or use keyboard copy mode with prefix+ , h/j/k/l , { / } , v , and y notifications — sounds and toasts for background events; tab-aware suppression 18 built-in themes — catppuccin, terminal, tokyo night, gruvbox, one, solarized, kanagawa, rosé pine, vesper, and light variants for the main palettes session persistence — pane processes survive client detach; sessions restore panes after full restart, with opt-in recent screen history The local Unix socket lets agents create workspaces, split or zoom panes, spawn helpers, read output, and wait for state changes. Start with the socket API docs https://herdr.dev/docs/socket-api/ and SKILL.md /ogulcancelik/herdr/blob/master/SKILL.md . automatic detection works out of the box. process name matching plus terminal output heuristics. | agent | idle / done | working | blocked | |---|---|---|---| | claude code https://docs.anthropic.com/en/docs/claude-code codex https://github.com/openai/codex droid https://factory.ai amp https://ampcode.com opencode https://github.com/anomalyco/opencode grok cli https://x.ai/grok hermes agent https://github.com/NousResearch/hermes-agent kilo code cli https://kilo.ai/ devin cli https://docs.devin.ai/cli github copilot cli https://github.com/features/copilot qodercli https://qoder.com/cli kiro cli https://kiro.dev/docs/cli/ detected but not fully tested: gemini cli, cline. for agents outside the built-in list, herdr still works as a terminal multiplexer with workspaces, panes, and tiling. custom integrations can report agent labels over the socket api. see the socket api docs https://herdr.dev/docs/socket-api/ . official integrations have two roles. claude code, codex, github copilot cli, devin, droid, qodercli, and cursor agent cli report session identity for native restore, while their state still comes from screen detection. pi, omp, kimi code cli, opencode, kilo code cli, and hermes report both semantic state and session identity. install with: herdr integration install pi herdr integration install omp herdr integration install claude herdr integration install codex herdr integration install copilot herdr integration install devin herdr integration install droid herdr integration install kimi herdr integration install opencode herdr integration install kilo herdr integration install hermes herdr integration install qodercli herdr integration install cursor see the integrations docs https://herdr.dev/docs/integrations/ for setup details. Press ctrl+b to enter prefix mode. Default actions are prefix-first and tmux-like: | key | action | |---|---| prefix+c | new tab | prefix+n / prefix+p | next / previous tab | prefix+1..9 | switch tab | prefix+w | workspace navigation | prefix+g | session navigator | prefix+shift+n | new workspace | prefix+shift+g | new worktree | prefix+shift+w | rename workspace | prefix+shift+d | close workspace | prefix+h/j/k/l | focus pane | prefix+shift+h/j/k/l | swap pane | prefix+v / prefix+minus | split pane | prefix+x | close pane | prefix+b | toggle sidebar | prefix+z | zoom pane | prefix+r | resize mode | prefix+q | detach | Mouse is supported throughout. Resize mode uses h / l for width, j / k for height, and esc to exit. Full syntax, optional actions, indexed bindings, and custom command bindings live in the configuration docs https://herdr.dev/docs/configuration/ . config file: ~/.config/herdr/config.toml herdr --default-config print full default config In-app settings cover theme, sound, and toast preferences. Herdr writes logs under ~/.config/herdr/ ; in persistent session mode, herdr-client.log and herdr-server.log are usually the useful files. Full configuration and logging details live in the configuration docs https://herdr.dev/docs/configuration/ . quick start https://herdr.dev/docs/quick-start/ — first session, panes, copy, and named sessions install https://herdr.dev/docs/install/ — install, update, Homebrew, mise, and Nix session state https://herdr.dev/docs/session-state/ — detach, restart restore, agent restore, and live handoff configuration https://herdr.dev/docs/configuration/ — keybindings, themes, notifications, environment variables integrations https://herdr.dev/docs/integrations/ — pi, omp, claude code, codex, cursor agent cli, github copilot cli, droid, kimi code cli, opencode, kilo code cli, hermes, qodercli integrations— reusable agent skill SKILL.md socket api https://herdr.dev/docs/socket-api/ — socket protocol and cli reference if you are an ai agent helping with this repository, read AGENTS.md /ogulcancelik/herdr/blob/master/AGENTS.md before making changes and read before opening issues or PRs. /ogulcancelik/herdr/blob/master/CONTRIBUTING.md CONTRIBUTING.md git clone https://github.com/ogulcancelik/herdr cd herdr cargo build --release ./target/release/herdr just test unit tests just check formatting, tests, and maintenance checks herdr is built full-time, in the open, with no revenue behind it. sponsoring directly funds development, stability, and the path to a real agent runtime. → become a sponsor https://github.com/sponsors/ogulcancelik · enterprise / partnership: hey@herdr.dev mailto:hey@herdr.dev · see SPONSORS.md /ogulcancelik/herdr/blob/master/SPONSORS.md for tiers. thank you 🐑 Herdr is dual-licensed: - Open source: GNU Affero General Public License v3.0 or later AGPL-3.0-or-later . - Commercial: commercial licenses are available for organizations that cannot comply with AGPL. Contact: hey@herdr.dev mailto:hey@herdr.dev