/**
 * Adapter: spawns one isolated child agent per `agent()` call from a workflow.
 *
 * Wraps the existing `createDelegateChildHandle` so the workflow runtime stays
 * decoupled from the LLM stack (it sees only the `SubagentRunner` interface).
 *
 * Key behaviour:
 * - When `opts.schema` is provided, we inject `structured_output` into the child
 *   tool set and unwrap the captured value on success. If the subagent finishes
 *   without ever calling `structured_output`, we treat it as failure (`null`).
 * - Failures and aborts resolve to `null`. The workflow runtime continues — this
 *   matches the pi-dynamic-workflows contract and keeps fan-out pipelines robust.
 * - We do NOT mutate `createDelegateChildHandle` — we just leverage its
 *   `buildChildTools` injection point.
 */
import type { AgentTool } from '@earendil-works/pi-agent-core';
import type { Api, Model } from '@earendil-works/pi-ai';
import type { Config } from '../../config/schema.js';
import type { MessageBus } from '../../infra/bus/index.js';
import type { SessionStore } from '../../session/store.js';
import { type BuildChildToolsOptions } from '../child-agent-factory.js';
import type { ToolExecutorConfig } from '../tools/executor.js';
import type { SubagentRunOptions, SubagentRunner } from './types.js';
export interface DelegateSubagentRunnerDeps {
    workspace: string;
    bus: MessageBus;
    agentId?: string;
    /** Resolves the default subagent model (typically the parent agent's primary model). */
    getDefaultModel: () => Model<Api>;
    getConfig: () => Config | undefined;
    toolExecutorConfig?: Partial<ToolExecutorConfig>;
    sessionStore?: SessionStore;
    /**
     * Provided by the workflow tool from `AgentToolsFactory` — mirrors how
     * `delegate-tool` is wired (avoids importing `tools/factory.ts` here and
     * breaking the existing factory ↔ delegate-tool ↔ child-agent-factory
     * dependency contract).
     */
    buildChildTools: (opts: BuildChildToolsOptions) => AgentTool<any, any>[];
}
export declare class DelegateSubagentRunner implements SubagentRunner {
    private readonly deps;
    constructor(deps: DelegateSubagentRunnerDeps);
    run<T = string>(prompt: string, opts: SubagentRunOptions<T>): Promise<T | null>;
    private preparePersistentSubagentSession;
}