Function structuredStartEvent

packages/ai/tests/structured-output-middleware.test.ts:40–47

Typed structured-output.start event — no cast needed because we name * the precise interface from src/types.ts.

(messageId: string)

/** Typed structured-output.start event — no cast needed because we name
 *  the precise interface from src/types.ts. */
function structuredStartEvent(messageId: string): StructuredOutputStartEvent {
  return {
    type: EventType.CUSTOM,
    name: 'structured-output.start',
    value: { messageId },
    timestamp: Date.now(),
  }
}

/** Typed structured-output.complete event. */
function structuredCompleteEvent<T>(