/**
 * Generic task creation, readiness acknowledgement, and dispatch rejection.
 * Task-run transport (start/command/view) lives in `run-parent.ts`, which
 * Callers compose these primitives around their own executor policy.
 */
import type { ActivityObserverConfig } from "#channel/types.js";
import type { HarnessSession } from "#harness/types.js";
import type { JsonValue } from "#shared/json.js";
import type { TaskExecutorBinding } from "#tools/task.js";
import { type TaskMetadata } from "#tasks/types.js";
/** A prepared background task: identity plus its started durable run. */
export interface BackgroundTask {
    readonly taskInboxToken: string;
    readonly createdByStepIndex?: number;
    readonly createdByTurnId: string;
    readonly executor?: TaskExecutorBinding;
    readonly metadata: TaskMetadata;
    readonly taskId: string;
    readonly taskRunId: string;
}
type BackgroundTaskDraft = Omit<BackgroundTask, "taskRunId">;
/** Derives the replay-stable task identity before its owning run is started. */
export declare function prepareBackgroundTask(input: {
    readonly callId: string;
    readonly metadata: TaskMetadata;
    readonly parentSessionId: string;
    readonly parentStepIndex?: number;
    readonly parentTurnId: string;
    readonly session: HarnessSession;
}): BackgroundTaskDraft;
/** Starts a lifecycle-only task run for a non-workflow external executor. */
export declare function beginBackgroundTask(input: {
    readonly activityObserver?: ActivityObserverConfig;
    readonly callId: string;
    readonly metadata: TaskMetadata;
    readonly parentSessionId: string;
    readonly parentStepIndex?: number;
    readonly parentTurnId: string;
    readonly session: HarnessSession;
}): Promise<BackgroundTask>;
/** Releases task events only after the parent session index committed. */
export declare function acknowledgeDelegatedTasksStep(input: {
    readonly tasks: readonly {
        readonly taskInboxToken: string;
        readonly taskId: string;
        readonly taskRunId: string;
    }[];
}): Promise<void>;
/** Silently terminates a task whose child dispatch failed before parent indexing. */
export declare function rejectDelegatedDispatch(input: {
    readonly error: JsonValue;
    readonly task: BackgroundTask;
}): Promise<void>;
export {};