/**
 * [WHO]: Provides ExtensionEventBridge, ExtensionEventBridgeDeps
 * [FROM]: Depends on agent-core AgentEvent, extensions-host event types, and ExtensionRunner
 * [TO]: Consumed by core/runtime/agent-session.ts for extension-facing event fanout
 * [HERE]: core/runtime/event-bridge.ts - narrow extension event mapping extracted from AgentSession
 *
 * Extracted from AgentSession (P4.7 / AS07). This bridge owns only AgentEvent ->
 * extension event mapping and extension turn indexing. AgentSession keeps public
 * subscribe(), session persistence, retry/compaction ordering, and Soul lifecycle work.
 */
import type { AgentEvent } from "@catui/agent-core";
import { type ExtensionRunner } from "../extensions-host/index.js";
export interface ExtensionEventBridgeDeps {
    getExtensionRunner: () => ExtensionRunner | undefined;
}
export declare class ExtensionEventBridge {
    private readonly deps;
    private _turnIndex;
    constructor(deps: ExtensionEventBridgeDeps);
    emitExtensionEvent(event: AgentEvent): Promise<void>;
}