Function createSSEStream

createSSEStream(
    responseBody: ReadableStream<Uint8Array<ArrayBufferLike>>,
    warnings: SharedV3Warning[],
    onData?: (type: string, data: unknown) => void,
): ReadableStream<LanguageModelV3StreamPart>
Creates a ReadableStream that parses AI SDK v6 UI Message Stream SSE data from a response body and emits LanguageModelV3 stream parts.

Text lifecycle events (text-start / text-end) are forwarded from the server. Tool calls are tracked to ensure the finish reason is set correctly.
Parameters
- responseBody: ReadableStream<Uint8Array<ArrayBufferLike>>
- warnings: SharedV3Warning[]
- OptionalonData: (type: string, data: unknown) => void
Returns ReadableStream<LanguageModelV3StreamPart>
- Defined in agent-provider/src/utils.ts:350