Defined in: packages/ai/src/types.ts:1404
Emitted at the start of a streaming structured-output run, before the JSON deltas. Tells consumers that the upcoming TEXT_MESSAGE_CONTENT deltas belong to a structured response so they can route those bytes into a StructuredOutputPart instead of building a TextPart. Carries the messageId the deltas will be tagged with so the routing decision can be made per-message rather than globally.
optional metadata?: Record<string, any>;Defined in: packages/ai/src/types.ts:1368
name: "structured-output.start";Defined in: packages/ai/src/types.ts:1405
CustomEvent.nametype: "CUSTOM";Defined in: packages/ai/src/types.ts:1367
value: object;Defined in: packages/ai/src/types.ts:1406
messageId: string;CustomEvent.value