import { DSQLClient } from '../dsql/client.js';
import type { KernelEvent } from '../types.js';
export interface BrowserEnvironmentOptions {
    /** Port the kernel HTTP transport is listening on. Defaults to 7341. */
    httpPort?: number;
}
/**
 * BrowserEnvironment connects to a running DSR kernel from a browser context
 * (e.g. an online IDE or web-based design tool) via the HTTP fallback transport.
 *
 * Uses SSE (Server-Sent Events) for kernel push events when EventSource is
 * available in the browser.
 */
export declare class BrowserEnvironment {
    #private;
    constructor(options?: BrowserEnvironmentOptions);
    connect(): Promise<void>;
    disconnect(): Promise<void>;
    get dsql(): DSQLClient;
    onEvent(handler: (event: KernelEvent) => void): () => void;
}
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