Orchestrate multiple coding-agent CLIs (codex/gemini/copilot/claude) headlessly — each in its own git worktree, driven non-interactively (one-shot, not interactive REPLs; each worker runs in a tmux window by default so its output stays visible), then merged. Use when fanning real implementation or review work out to several model CLIs in parallel without driving interactive REPLs, when you need worktree isolation so agents don't collide, or when distributing token cost onto external providers. Trigger on "run codex/gemini/copilot in parallel", "headless multi-agent", "git worktree per agent", "non-interactive CLI agents", "offload work to other model CLIs", "parallel build with isolated worktrees". For interactive tmux worker teams use quintet-team-runtime instead; for one-shot opinions use quintet-fleet-dispatch.