/**
 * [WHO]: InProcessSubAgentBackend class - in-process SubAgent backend
 * [FROM]: Depends on core/runtime/sdk, ./sub-agent-types
 * [TO]: Consumed by ./sub-agent-runtime, ./index.ts
 * [HERE]: core/sub-agent/sub-agent-backend.ts - in-process SubAgent implementation
 */
import type { CreateAgentSessionOptions } from "../runtime/sdk.js";
import type { AgentSession } from "../runtime/agent-session.js";
import type { SubAgentBackend, SubAgentHandle, SubAgentSpec } from "./sub-agent-types.js";
/**
 * Factory function type for creating an AgentSession.
 * Injected by the caller (agent-session.ts) to avoid a circular dependency
 * between core/sub-agent/ and core/runtime/sdk.ts.
 */
export type CreateSessionFn = (options: CreateAgentSessionOptions) => Promise<{
    session: AgentSession;
}>;
/**
 * In-process SubAgent backend.
 * Wraps createAgentSession() to run SubAgent in the same process.
 */
export declare class InProcessSubAgentBackend implements SubAgentBackend {
    private createSession;
    /** Running sessions indexed by agentId (for SendMessage routing, CC §XI) */
    private sessions;
    constructor(createSession: CreateSessionFn);
    spawn(spec: SubAgentSpec): Promise<SubAgentHandle>;
    /**
     * Get a running agent's session by agent ID (for SendMessage routing, CC §XI).
     * Returns undefined if the agent is not running or has completed.
     */
    getSession(agentId: string): {
        session: AgentSession;
        abort: () => void;
    } | undefined;
}