import type { VercelSandboxClient, VercelSandboxHandle } from './client.js';
import type { VercelBranchMetadataStore } from './metadata.js';
export declare const DISPLAY_STARTUP_TIMEOUT_MS = 30000;
export interface DisplayStartupOptions {
    sandbox: VercelSandboxHandle;
    client: VercelSandboxClient;
    store: VercelBranchMetadataStore;
    secrets: string[];
    signal?: AbortSignal;
}
export declare class VercelDisplayStartupError extends Error {
    readonly code = "display_startup_failed";
    constructor(message: string);
}
export declare function startDisplayStack(options: DisplayStartupOptions): Promise<void>;
/**
 * Verified-running check for re-entry paths: true only when one status poll
 * reports every required service running. Any failure reads as not running so
 * callers fall back to full startup.
 */
export declare function isDisplayStackRunning(options: {
    sandbox: VercelSandboxHandle;
    client: VercelSandboxClient;
    secrets?: readonly string[];
    signal?: AbortSignal;
}): Promise<boolean>;