Herdr

Canonical version: Herdr.

Herdr is a terminal-native agent runtime; "one terminal for the whole herd". It sits between traditional terminal multiplexers (tmux, screen) and desktop agent applications, designed for engineers running multiple AI agents in parallel.

What It Does

Keeps your existing shell, SSH config, fonts, and keybinds, then layers in:

• Real PTY panes inside your current terminal — no replacement needed
• Mouse-native UI with clickable panes, tabs, and menus
• tmux-style session persistence with detach/reattach
• Remote SSH attachment and thin-client support
• Semantic agent state tracking — blocked, working, done, idle
• CLI + socket API for agent orchestration
• Responsive layout that adapts to small screens

Why It Exists

Running 3–10 AI coding agents at once across multiple worktrees is painful in plain tmux: no visibility into which agent is blocked, no programmatic way to drive them, no consistent UI. Herdr makes the multi-agent shell experience first-class.

Technical Details

• Single Rust binary
• Works with any terminal: Ghostty, Kitty, iTerm, Alacritty, foot, etc.
• No Electron, no web view, no hosted control plane
• Install via curl, Homebrew, or Nix flake

References

• Official website: https://herdr.dev/

Related

• Claude Code
• AI Agents

About Sébastien

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