Use when spawning sub-agents, coordinating multi-agent coding workflows, handling worker restarts, model-fallback escalation, or preventing deadlocks via lock ordering. Also covers idle-fire dispatch loops, sharing state across agents, and stalled-worker recovery. Harness-agnostic; the hard dependency is Solo MCP (works with whatever agent harness Solo can spawn). Triggers: spawn agent, orchestrate workers, sub-agent coordination, idle timer, multi-agent, dispatch loop, restart worker, model fallback, lock ordering, deadlock, timeout escalation.
