import type { RunMatTestSession, WorkerSpawnInput } from "./types.js";
interface HostRequest {
    id: number;
    type: "install" | "execute" | "cancel" | "shutdown";
    payload?: unknown;
}
interface HostResponse {
    id: number;
    ok: boolean;
    value?: unknown;
    error?: string;
}
export interface TestWorkerHostOptions {
    createSession(input: WorkerSpawnInput): Promise<RunMatTestSession> | RunMatTestSession;
}
export interface TestWorkerScope {
    addEventListener(type: "message", listener: (event: MessageEvent<HostRequest>) => void): void;
    postMessage(message: HostResponse): void;
}
/**
 * Installs the deliberately small child-worker protocol. This code owns
 * transport and session lifetime only; Rust owns scheduling and semantics.
 */
export declare function installRunMatTestWorkerHost(scope: TestWorkerScope, options: TestWorkerHostOptions): void;
export {};
//# sourceMappingURL=worker-host.d.ts.map