/** Default per-file limit applied before a data URL read. */
export declare const DEFAULT_DATA_URL_MAX_FILE_BYTES: number;
/** Default selection limit applied before multiple data URL reads. */
export declare const DEFAULT_DATA_URL_MAX_FILE_COUNT = 5;
/**
 * File selection budgets checked before content is read.
 */
export interface FileBudget {
    readonly maxFileBytes?: number;
    readonly maxFileCount?: number;
}
/**
 * User-facing messages for file budget failures.
 */
export interface FileBudgetMessages {
    readonly fileCount: string;
    readonly fileSize: string;
}
/**
 * Rejects a file selection that exceeds configured count or size limits.
 *
 * @param files - Selected files.
 * @param budget - Optional maximum count and per-file byte size.
 * @param messages - User-facing limit messages.
 * @throws EditorFileLimitError before any file content is read.
 */
export declare function validateFileBudget(files: readonly File[], budget: Readonly<FileBudget>, messages: Readonly<FileBudgetMessages>): void;