import { type ChildProcess } from "node:child_process";
import { type PresenceConfig } from "../shared/config.js";
export type SpawnLike = (command: string, args: readonly string[], options: {
    cwd: string;
    detached: boolean;
    stdio: "ignore";
    env: NodeJS.ProcessEnv;
}) => Pick<ChildProcess, "once" | "unref">;
interface HelperAutostartDeps {
    fetchImpl?: typeof fetch;
    spawnImpl?: SpawnLike;
    helperEntrypoint?: string;
    helperCwd?: string;
    processExecPath?: string;
    fileExists?: (path: string) => boolean;
    healthcheckTimeoutMs?: number;
    startupTimeoutMs?: number;
    pollIntervalMs?: number;
    debugLogging?: boolean;
}
export declare function ensureHelperRunning(config?: Pick<PresenceConfig, "serverHost" | "serverPort" | "autostartHelper">, deps?: HelperAutostartDeps): Promise<void>;
export declare function isHelperReachable(config?: Pick<PresenceConfig, "serverHost" | "serverPort">, fetchImpl?: typeof fetch, timeoutMs?: number): Promise<boolean>;
export declare function isHelperUnavailableError(error: unknown): boolean;
export declare function resetHelperAutostartForTests(): void;
export {};