Interface: UIMessage<TData>#

Defined in: packages/typescript/ai/src/types.ts:423

UIMessage - Domain-specific message format optimized for building chat UIs Contains parts that can be text, tool calls, or tool results. Generic over the structured-output data type so useChat({ outputSchema })'s schema narrows parts.find(p => p.type === 'structured-output').data on the consumer side without manual casts.

Type Parameters#

TData#

TData = unknown

Properties#

createdAt?#

optional createdAt: Date;

optional createdAt: Date;

Defined in: packages/typescript/ai/src/types.ts:427

id#

id: string;

id: string;

Defined in: packages/typescript/ai/src/types.ts:424

parts#

parts: MessagePart<TData>[];

parts: MessagePart<TData>[];

Defined in: packages/typescript/ai/src/types.ts:426

role#

role: "user" | "assistant" | "system";

role: "user" | "assistant" | "system";

Defined in: packages/typescript/ai/src/types.ts:425