Herdr on a Mac

Agent multiplexer; tmux for AI coding agents (terminal) · Agent Platforms

Herdr (herdr.dev) is an open-source agent multiplexer: a single ~10 MB Rust binary that runs many terminal AI coding agents in parallel with panes, tabs and workspaces; tmux, but agent-aware. It tracks each agent's semantic state in a sidebar (blocked / working / done / idle) so you can see which one needs input, and sessions persist across detach/reattach; including over SSH from another machine or a phone. A CLI and a local JSON socket API let the agents themselves open workspaces, split panes and spawn helpers. Works with Claude Code, Codex, Gemini CLI, Droid, OpenCode, Aider, Copilot CLI and any terminal agent. brew install herdr (macOS/Linux; AGPL-3.0). A terminal tool; no port or web UI of its own; complements FrontierStack's Agent Sessions.

Run Herdr with FrontierStack

Install or connect Herdr; then check its status, ports and certificate from FrontierStack. The same screen links to firewall checks, Malware Audit and backups where they apply.

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