Let it delegate
Earlier models needed discouraging from sub-agents. Fable 5.1 handles them well.
Delegate independent subtasks to sub-agents and keep working while they run — don't stop and wait for each one. Intervene if a sub-agent goes off track or is missing relevant context. Good candidates for delegation: <list them — e.g. verification, a separate module, research into a library>.
Asynchronous beats spawn-and-wait: the lead keeps its context and isn't bottlenecked on the slowest worker. Say explicitly when delegation is welcome.