import { Client } from "../../../shared/nodejs/websocket";
import { AppMeta, DevServerEvents } from "@narraleaf/shared";
import { App } from "../../app/app";
export declare class DevToolManager {
    private app;
    private wsClient;
    private metadata;
    private initialized;
    constructor(app: App);
    initialize(): void;
    private setupDevServer;
    private setupDevServerHandlers;
    fetchMetadata(): Promise<void>;
    getMetadata(): AppMeta;
    tryGetMetadata(): AppMeta | null;
    getDevServerClient(): Client<DevServerEvents> | null;
    setupLifecycleViolationWarning(timeout: number): void;
    cleanup(): void;
}