herdr

• 1. overview (453 chars)

  herdr is an AI-coded agent multiplexer running in the terminal, developed in Rust by Turkish developer Oğulcan Çelik. It combines tmux-level persistent session capabilities with AI Agent state awareness, allowing developers to run, monitor, and manage multiple AI coding assistants simultaneously in a terminal window. Since the project was launched, it has received more than 14,000 stars on GitHub, and the community has grown rapidly. It is considered a directional product for terminal multiplexers in the era of AI programming.

• 2. Product background (800 chars)

  Herdr is developed full-time by independent developer Oğulcan Çelik, and the project is licensed under the Apache 2.0 license (relicensed from AGPL-3.0 on July 22, 2026), with commercial license options available. The project is funded through GitHub Sponsors, with gold sponsors including Terminal Trove. The developer himself once said on Reddit, "I love my terminal and don't wanna leave" - ​​this sentence basically sums up herdr's design philosophy.   The birth background of herdr is very straightforward: with the popularity of AI-edited agents such as Claude Code, Codex, Cursor Agent, Gemini CLI, etc., developers discovered that although the traditional terminal multiplexer (tmux) can persist the session, it has no idea what is running in the window - whether the agent is working, stuck, or has been completed, you have to scroll through the windows one by one to see. herdr is targeting this new pain point of "too many agents to manage".

• 3. Product functions and usage experience (2319 chars)

  The core architecture of herdr is a background daemon that manages persistent PTY sessions. It uses a three-tier organizational model: Workspace → Tab → Pane. Each pane runs a real terminal process, not a wrapped proxy view.   The feature that gets the most attention is Agent state awareness. The sidebar of herdr color-codes the status of each Agent: green means working, yellow means blocked (requiring user input or approval), blue means completed, and gray means idle. Status detection is implemented through two sets of mechanisms: deeply integrated Agents report status directly through life cycle hooks; other Agents make heuristic judgments by reading terminal screenshots. Currently, it fully supports 16 mainstream Agents including Claude Code, Codex, Cursor, GitHub Copilot CLI, Devin CLI, and Gemini CLI.   The ability to persist sessions is also a core selling point. herdr adopts a server-client architecture. When the connection is disconnected, only the client is closed, and the background server and the Agent inside continue to run. You can reconnect by typing herdr again in another terminal, and the pane can be restored even after the system is restarted. In terms of remote use, herdr supports SSH program connection and --remote mode, and can retain the ability to paste pictures in remote mode - the chart screenshots produced by the Agent are displayed normally on the local terminal, which is not possible with the pure SSH + tmux combination.   herdr also has a differentiating capability: Socket API. Agents can call herdr through a local Unix Socket - create workspaces, split panes, read output, and wait for other agents to complete. This means that you can let a master agent schedule other agents to truly realize multi-agent collaborative workflow. Installing a reusable Agent Skill only requires one line of commands.   In terms of operating experience, herdr supports both keyboard and mouse. The shortcut keys follow the Ctrl+B prefix key model of tmux, and also support mouse click, drag, and right-click menu to split the pane. Installation only requires one line of command: curl -fsSL https://herdr.dev/install.sh | sh or brew install herdr, the single binary file is about 10MB, no Electron, no runtime dependencies.In terms of competitive product comparison, herdr’s positioning is relatively unique. tmux can persist the terminal but does not understand Agent; Zellij has a more modern interface but also does not have Agent state awareness; Warp and VS Code Terminal provide a better visual experience but cannot be used without the desktop environment. herdr is currently the only tool that simultaneously achieves "terminal native persistence + Agent semantic state awareness + Agent programmable control".

• 4. Pricing and business model (452 chars)

  herdr is an open source project licensed under the Apache 2.0 license (early AGPL-3.0, changed to the more permissive Apache 2.0 on July 22, 2026). Individual developers can use it for free. Organizations unable to comply with Apache 2.0 can purchase a commercial license. The project is currently developed full-time by the author and is maintained by GitHub Sponsors. There is no commercial income yet. Judging from the license changes, the project may be adjusting its open source strategy to attract a wider range of enterprise users.

• 5. User reviews (1069 chars)

  Positive comments focus on several aspects: Agent status awareness is considered the "killer feature" - you can see which Agent is stuck at a glance, without having to check window by window. Some users said that they used more than ten terminal windows to manage different Agents. After using herdr, they "can organize things more orderly." The mouse support and low entry barrier have also received a lot of praise, especially from users who have migrated from tmux.   Negative feedback mainly comes from two directions: First, the skeptics who "just use tmux" believe that tmux has done a good job in persisting sessions and pane management, and the perceived value of agents added by herdr is limited; second, there are doubts about the multi-agent workflow itself - some users feel that running two or three agents at the same time is messy enough, and the real bottleneck is review and decision-making, not running more agents concurrently.   In community discussions, some users also gave alternatives: some people used Zellij and stop hook to achieve similar notification effects, some people used Emacs and agent-shell to cooperate with Projectile for Agent management, and some people mentioned conductor.build, beehive, agent-of-empires and other similar tools.

• 6. Industry evaluation (796 chars)

  herdr received 287 likes and a lot of discussion on Hacker News, making it to the front page. AI Weekly rated it as "a targeted answer to a problem that tmux was never designed to solve." Industry media generally believe that herdr represents the tool evolution trend "from single agent to multi-agent collaboration". Multiple Agent projects (OpenCode, Kilo Code) have provided native support for herdr's Socket API.   However, some analysts pointed out that the current version number of herdr is still v0.7.5, which is in the early stage of rapid iteration. Features are updated frequently, but configuration stability is not guaranteed. The plug-in market is relatively young, and there is a clear gap between the plug-in ecology of tmux which has been around for more than ten years. In terms of competing products, Zellij is being continuously updated, Warp is also adding Agent-related functions, and competition on the track is intensifying.

• 7. Controversies and Risks (715 chars)

  The main risk is maturity. Herdr's blocking status detection adopts a conservative strategy - only matching known UI patterns. The new prompt format may be recognized as "idle" instead of "blocked", causing the user to miss tasks that require operation. The status detection of some Agents is incomplete: pi's blocking status is partially supported, kiro CLI does not support it at all, gemini CLI and cline have detected it but lack complete testing.   Licensing-wise, although there has been a change from AGPL to Apache 2.0, some enterprises may still need to evaluate individually. The Windows version is still in beta, and its stability and experience are not as good as macOS/Linux.   There is also controversy in community discussions about "AI slop" - some people believe that such tools are over-marketed and can actually solve limited problems.

• 8. Applicable groups and usage suggestions (610 chars)

  herdr is most suitable for two types of users: one is developers who run different AI-encoded Agents on multiple terminals at the same time; the other is people who want to build a multi-Agent collaborative workflow - allowing multiple Agents to work at the same time and cooperate with each other. The installation cost is very low and it is worth spending ten minutes to try.   It is not recommended for the following users: people who only use one Agent and do not find it troublesome to switch windows; people who mainly develop on Windows (it is recommended to wait and see during the Beta stage); people who need a mature terminal multiplexer instead of an Agent workbench (tmux and Zellij are still better choices in this scenario).

• 9. Summarize (443 chars)

  herdr At the intersection of "Agent Workbench", we have not yet found a replacement with the same degree of completion. It accurately captures the new needs brought about by the popularity of AI-encoded Agents—the Agent status is invisible—and provides a terminal-native solution. The project is still in its early stages, but the direction is right and the community has fully verified it. If the current iteration speed is maintained, herdr has the potential to become a standard terminal tool for developers in the AI ​​era.

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  Amy_Thomas36999

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  After three days with herdr, the sidebar status indicator is truly amazing. I used to have Claude Code and Codex in separate terminal windows, constantly switching without knowing which one finished. Now I can see at a glance which agent is blocked. Productivity has improved significantly.

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  organickoala379

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  Installation is really simple, just one curl command. But there are quite a few keyboard shortcuts to learn.

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  Alexa505

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  Finally found something to replace tmux. Mouse-driven pane splitting is so much more comfortable, no need to memorize all those shortcuts.

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  DennisWhite

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  Wrote a small script for Claude Code to call herdr's socket API and create new panes. Agents can actually orchestrate themselves. Still early but the direction is spot on.

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  JacquelineLopez_Plus

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  Remote mode is the highlight. Run herdr on a server, SSH from your phone to check status, no need to open your laptop. Tmux can do remote too, but herdr's sidebar tells you instantly which one is blocked.

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  RoyKimSr24

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  Tried it but feels immature. Some agent state detection is inaccurate. An agent waiting for confirmation shows as idle in the sidebar. Still have to visually check, might as well use tmux.

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  Stephanie_James_66

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  v0.7.5 now, the update pace is fast. The version from two weeks ago is already several features behind. But every update requires restarting the server, which drops running agents.

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  DAkra

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  Running three Claude Code instances simultaneously - one fixing bugs, one adding features, one writing tests. Herdr's workspace organization makes parallel tasks feasible. With tmux I always forgot which pane was doing what.

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  康彤素

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  Tried the zellij plus stop hook approach and it works. But herdr's out-of-the-box status indicators save a lot of configuration scripting.

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  EricStewart_X

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  Blocked detection is too conservative. Claude Code's new confirmation dialog wasn't matched and an agent was stuck for two hours before I noticed. Wish I could submit custom patterns.

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  AshleyOrtiz

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  I switched from Warp. Warp's workspace concept is good but only works locally. Herdr supports remote SSH connections and agents run on the backend server without worrying about disconnections.

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  smallsnake978

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  Running 8 agents daily here. Herdr saves at least half my context switching time. Used to scroll through every tmux pane to check status, now just one glance at the sidebar.

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  HashrateHero92

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  The plugin marketplace is still sparse with few useful third-party plugins. But with the socket API exposed, the community should be able to build something. Will wait and see.

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  ChristinaLewis_8890

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  Honestly I don't really need this. Running one agent doesn't require such complex tools. But seeing others run 7 or 8 agents simultaneously, I understand. Different scenarios have different needs.

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  MElop

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  Changing from AGPL to Apache 2.0 was a smart move. Previously our legal team banned AGPL open source tools. Now it can be used officially.

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  Jerry513

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  Tried SSH remote mode and image paste actually works. Previously with tmux, Claude Code diagrams were either invisible or garbled. Herdr displays them correctly.

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  流光_20

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  Came here after seeing the HN discussion. Some say emacs with agent-shell can do similar things, but honestly I don't have the energy to configure all that. Herdr works out of the box, worth it.

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  田芳

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  Port forwarding has issues. Opening multiple remote sessions causes conflicts. Checked the issues and it's a known bug being fixed. Will wait for the update.

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  trueLennyMarie_88

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  Last night I had a master agent dispatch two sub-agents running different tasks simultaneously. Herdr's socket API actually made it work. Agent A wrote code, agent B reviewed it, the master watched the status and notified me when done. The experience felt surreal.

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  Peter.Mendoza_X

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  Can't go back. Used to have four terminal tabs open; now one herdr window handles everything. Plus the agent keeps running even after disconnecting — I pick it back up when I get home. And with Tailscale, I can check it on my phone too.

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