/**
 * Whether the device fold can run: the devices a platform needs, booted and
 * carrying the app. The device-fold twin of the HTTP probe in targets.ts,
 * and like it, it never starts anything: a missing device is reported with
 * the project's own instruction for getting one.
 */
import { type NativeDevice, type NativePlatform } from "./native-device.js";
import type { DeviceKind, LookoutConfig } from "../types.js";
export interface DeviceStatus {
    platform: NativePlatform;
    /** The kinds the config requires (default phone). */
    required: DeviceKind[];
    /** One device per kind, booted right now. */
    booted: NativeDevice[];
    /** Required kinds with no booted device. */
    missing: DeviceKind[];
    /** Booted devices without the app installed. */
    appMissing: NativeDevice[];
    /** The config's own instruction, or the platform's generic one. */
    hint: string;
    /** No native block for this platform at all. */
    unconfigured: boolean;
}
/** Probe each native platform a run walks. Never boots or installs anything. */
export declare function preflightDevices(config: LookoutConfig, platforms: readonly NativePlatform[]): Promise<DeviceStatus[]>;
/** Why the device fold cannot run, or null when every required device is there with the app. */
export declare function deviceDownReason(statuses: readonly DeviceStatus[]): string | null;
/** One line per device for a person: what is booted and whether it can be photographed. */
export declare function deviceLines(statuses: readonly DeviceStatus[]): string[];