import { ModelMessage, UIMessage } from '../../../types.js';
/**
 * Loads the stored transcript of a finished subagent run by its
 * `subagentRunId`. Returns `undefined` for an unknown id. A persistence
 * middleware provides it. The agent tools read it to continue a
 * child by `sessionId`. When `agent` is set, only that agent can continue
 * the child. A middleware that provides it must list `LoadChildCapability`
 * in `provides`. Only then do the agent tools take `sessionId`.
 */
export type LoadChild = (subagentRunId: string) => Promise<{
    messages: Array<ModelMessage | UIMessage>;
    /** The name of the agent the child ran under. */
    agent?: string;
} | undefined>;
export declare const LoadChildCapability: import('./capabilities.js').Capability<LoadChild, "load-child">;
export declare const getLoadChild: import('./capabilities.js').CapabilityGetter<LoadChild>, provideLoadChild: import('./capabilities.js').CapabilityProvider<LoadChild>;