import { type BrowserTestRunnerOptions } from "./runner.js";
import type { BrowserTestEvent, BrowserTestRunInput, BrowserTestRunOutput } from "./types.js";
interface CoordinatorRequest {
    id: number;
    type: "run" | "cancel" | "dispose";
    input?: BrowserTestRunInput;
    reason?: string;
}
interface CoordinatorResultResponse {
    id: number;
    type: "result";
    ok: boolean;
    output?: BrowserTestRunOutput;
    error?: string;
}
interface CoordinatorEventResponse {
    id: number;
    type: "event";
    event: BrowserTestEvent;
}
type CoordinatorResponse = CoordinatorResultResponse | CoordinatorEventResponse;
export interface TestCoordinatorScope {
    addEventListener(type: "message", listener: (event: MessageEvent<CoordinatorRequest>) => void): void;
    postMessage(message: CoordinatorResponse): void;
}
export type TestCoordinatorHostOptions = Omit<BrowserTestRunnerOptions, "signal">;
/**
 * Hosts the portable Rust coordinator in a dedicated coordinator worker. The
 * host creates child test workers but contains no scheduling policy.
 */
export declare function installRunMatTestCoordinatorHost(scope: TestCoordinatorScope, options: TestCoordinatorHostOptions): void;
export declare class BrowserTestCoordinatorClient {
    private readonly worker;
    private nextId;
    private active;
    constructor(worker: Worker);
    run(input: BrowserTestRunInput, signal?: AbortSignal, onEvent?: (event: BrowserTestEvent) => void): Promise<BrowserTestRunOutput>;
    dispose(): void;
    private rejectActive;
}
export {};
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