/**
 * @license
 * Copyright 2026 Steven Roussey <sroussey@gmail.com>
 * SPDX-License-Identifier: Apache-2.0
 */
import type { StreamEvent, TaskOutput } from "@workglow/task-graph";
/**
 * Callback the dispatch layer hands to a run-fn so the run-fn can emit
 * in-flight stream events without ever returning them as a materialized value.
 * Output for one-shot capabilities rides on a single `finish` event; output for
 * streaming capabilities rides on the preceding `text-delta` / `object-delta`
 * / `snapshot` events with a trailing empty `finish`. The accumulator that
 * materializes a single `O` lives only at terminal consumer sites
 * ({@link AiTask.execute}, {@link StreamProcessor}'s `ctx.shouldAccumulate`
 * branch).
 */
export type AiEmit<O extends TaskOutput = TaskOutput> = (event: StreamEvent<O>) => void;
/**
 * Discards every event. Used by callers that don't need mid-stream events but
 * still want to drive a run-fn to completion.
 */
export declare const noopEmit: AiEmit;
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