An agent multiplexer manages multiple coding agents working in parallel, similar to how tmux manages terminal sessions. First-generation multiplexers used Git worktrees to give each agent separate working directories, while second-generation systems add sandboxed containers for isolated processes and dependencies. Ephemeral workspaces are deleted after tasks complete, with conversation history and artifacts preserved in shared storage.
Herdr Studio is a browser-based workspace for managing coding agents, terminals, and Git worktrees. It provides real terminal streaming, file inspection, and session management through a lightweight bridge that connects to local or remote Herdr servers.