/**
 * Checks if the given directory appears to be a valid signageOS applet directory.
 *
 * A valid applet has @signageos/front-applet as a dependency.
 * This is the definitive marker that distinguishes applets from other projects.
 *
 * @param directoryPath - The directory path to validate
 * @returns true if the directory appears to be a valid applet, false otherwise
 */
export declare function isValidAppletDirectory(directoryPath: string): Promise<boolean>;
/**
 * Validates that the directory is a valid applet directory and throws an error if not.
 *
 * @param directoryPath - The directory path to validate
 * @throws {Error} If the directory is not a valid applet directory
 */
export declare function validateAppletDirectory(directoryPath: string): Promise<void>;