earendil-works/pi · error · Error

${model.provider} stream ended without a terminal event

Error message

${model.provider} stream ended without a terminal event

What it means

Error "${model.provider} stream ended without a terminal event" thrown in earendil-works/pi.

Source

Thrown at packages/ai/src/api/pi-messages.ts:412

			await options?.onResponse?.({ status: response.status, headers: headersToRecord(response.headers) }, model);

			if (!response.ok) {
				const body = await response.text();
				throw createPiMessagesResponseError(model, url, response, body);
			}
			if (!response.body) {
				throw new Error(`${model.provider} response has no body`);
			}

			for await (const piEvent of readPiMessagesEvents(response.body)) {
				const event = convertEvent(piEvent);
				eventStream.push(event);
				if (event.type === "done" || event.type === "error") {
					return;
				}
			}

			throw new Error(`${model.provider} stream ended without a terminal event`);
		} catch (error) {
			eventStream.push(createErrorEvent(model, error, options?.signal?.aborted ?? false));
		}
	})();

	return eventStream;
};

export const streamSimple: StreamFunction<"pi-messages", SimpleStreamOptions> = (
	model: Model<"pi-messages">,
	context: Context,
	options?: SimpleStreamOptions,
): AssistantMessageEventStream => {
	const extra = options as PiMessagesOptions | undefined;
	return stream(model, context, {
		...options,
		reasoning: options?.reasoning,
		toolChoice: options?.toolChoice,

View on GitHub (pinned to 4af9d21d3b)

Solutions

1. Retry; check for stream truncation before the terminal event.

When it happens

Trigger: Thrown at packages/ai/src/api/pi-messages.ts:412 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of earendil-works/pi@4af9d21d3b (2026-08-24). Data as JSON: /api/errors/c811eec79d5cda07. Report an issue: GitHub.