/**
 * JSONL File Operations
 *
 * Utilities for reading and writing JSONL (JSON Lines) files.
 * Each line is a valid JSON object, making it append-friendly and streamable.
 */
/**
 * Ensure directory exists for a file path
 */
export declare function ensureDir(filePath: string): Promise<void>;
/**
 * Append a record to a JSONL file
 */
export declare function appendJsonl<T>(filePath: string, record: T): Promise<void>;
/**
 * Read all records from a JSONL file
 */
export declare function readJsonl<T>(filePath: string): Promise<T[]>;
/**
 * Read records from a JSONL file with filtering
 */
export declare function queryJsonl<T>(filePath: string, predicate: (record: T) => boolean, options?: {
    limit?: number;
}): Promise<T[]>;
/**
 * Update a record in a JSONL file by rewriting
 * Note: This is O(n) - for frequent updates consider a different storage
 */
export declare function updateJsonl<T>(filePath: string, predicate: (record: T) => boolean, updater: (record: T) => T): Promise<boolean>;
/**
 * Find a single record in a JSONL file
 */
export declare function findJsonl<T>(filePath: string, predicate: (record: T) => boolean): Promise<T | null>;
//# sourceMappingURL=jsonl.d.ts.map