Type Alias: LifecycleEvent<TContext, TOutput>

type LifecycleEvent<TContext, TOutput> = 
  | ThreadStartEvent<TContext>
  | ThreadStopEvent<TContext, TOutput>
  | ModelCallStartEvent<TContext>
  | ModelCallEndEvent<TContext>
  | ToolCallStartEvent<TContext>
| ToolCallEndEvent<TContext>;