Herdr is a terminal multiplexer for coding agents. It holds real terminals open in a background server on a laptop, a desktop, or a rented machine, so agent work keeps running when you close the client or lose an SSH connection, and you can reattach from any terminal. After a server or machine restart, it restores the saved layout and resumes supported agent sessions, though the original processes do not survive.
It runs the agent CLIs you already use, such as Claude Code, Codex, Cursor, OpenCode, and Grok, without wrapping or replacing them. Herdr owns their terminals and marks every pane as working, blocked, or idle, so an agent waiting for an answer stands out. Local work and saved SSH machines appear in one window with a combined agent list and independent reconnects.
Agents can drive Herdr themselves through its CLI and socket API: they spawn panes, prompt each other, and wait until another agent is blocked. Herdr ships as a single Rust binary that runs inside your existing terminal, with tmux-style prefix keys alongside mouse click, drag, and split, and a plugin marketplace for extending panes and workflows.
Features
- Detachable sessions: terminals keep running in a background server when the client closes or SSH drops
- Session restore: saved layouts and supported agent sessions come back after a restart
- Agent status: each pane is marked working, blocked, or idle
- Multiple machines: local and SSH machines in one window with a combined agent list
- Agent-native API: agents spawn panes, prompt each other, and wait on blocked agents through the CLI and socket API
- Existing agent CLIs: runs Claude Code, Codex, Cursor, OpenCode, Grok, and others unchanged
- Keyboard and mouse: tmux-style prefix keys plus click, drag, and split
- Plugins: a marketplace for extending panes and workflows
