pub trait ChildCompletionHandler: Send + Sync {
// Required method
fn on_child_completed<'life0, 'async_trait>(
&'life0 self,
completion: ChildCompletion,
) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>
where Self: 'async_trait,
'life0: 'async_trait;
}Expand description
Application-layer callback invoked when a child session reaches a terminal state. Implementations must be idempotent: duplicate completion events for the same child can occur when watchdog timeout races normal runner teardown.