herdr is a terminal-based multiplexer for orchestrating multiple AI coding agents in parallel, letting users manage agent state (blocked/working/done) across panes, tabs, and workspaces with detach/reattach persistence. The project has rapidly gained ~12k GitHub stars and hit trending, appealing to developers running local or remote agent fleets who want unified visibility without GUI overhead.

One insight: No monetization evidence (fully open-source binary), so this is a developer tool play rather than a revenue wedge — any fast-follow must either remain open-source or find a paid SaaS layer (hosted orchestration, team collaboration, monitoring) not present in the original.