import type { Config } from '../config/schema.js';
import type { SessionIndex } from '../session/index.js';
import { type TaskConversationState, type TaskHandoffSnapshot } from './task-conversation-repository.js';
import { type TaskAggregate } from './task-repository.js';
export interface TaskHandoffResult {
    task: TaskAggregate;
    conversation: TaskConversationState;
    snapshot: TaskHandoffSnapshot;
    fromAgentId?: string;
    toAgentId: string;
    activeSessionKey: string;
    assignmentEpoch: number;
}
export declare class TaskHandoffService {
    #private;
    private readonly deps;
    constructor(deps: {
        getConfig: () => Config;
        sessionIndex: SessionIndex;
        getActiveRunId: (sessionKey: string) => string | undefined;
        abortRun: (runId: string) => Promise<unknown>;
    });
    handoff(input: {
        taskId: string;
        toAgentId: string;
        expectedVersion: number;
        idempotencyKey: string;
    }): Promise<TaskHandoffResult>;
    private performHandoff;
    private abortPreviousSession;
}