/**
 * Custom replacer for JSON.stringify that handles non-serializable types.
 * Converts Date to ISO string and replaces binary data, functions, symbols,
 * and BigInt with '<replaced>'.
 *
 * @param _key - The property key (unused)
 * @param value - The value to process
 * @returns A JSON-safe value
 */
export declare function jsonReplacer(_key: string, value: unknown): unknown;
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