export interface StreamOptions {
    rootDir: string;
    format: "json" | "jsonl";
    overwrite?: boolean | undefined;
    timeoutMs?: number | undefined;
}
/**
 * Streams an HTTP response from YouTrack into a file inside `rootDir`.
 *
 * For `format: "jsonl"` the response is parsed incrementally via stream-json
 * and each top-level array element is written on its own line — chunk
 * boundaries no longer break parsing. For `format: "json"` the response is
 * written as-is. Partial files are removed on any error or HTTP failure.
 */
export declare function streamArrayToFile(url: string, targetRel: string, token: string, options: StreamOptions): Promise<string>;
export declare function safeFilename(input: string): string;
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