/**
 * Atomically write content to a file using temp + rename pattern.
 * Safe against process crashes and concurrent writes to the same file.
 *
 * How it works:
 * 1. Creates parent directories if they don't exist
 * 2. Writes content to a hidden temp file in the same directory
 * 3. Renames temp file to target (atomic on POSIX systems)
 * 4. Cleans up temp file if any step fails
 *
 * This prevents:
 * - Truncated files from process crashes mid-write
 * - Corrupted files from concurrent writes
 *
 * @param filePath - Absolute path to the target file
 * @param content - String or Buffer content to write
 * @param encoding - Character encoding (default: 'utf-8')
 *
 * @example
 * // No need to mkdir before calling - directories are created automatically
 * await atomicWriteFile('/path/to/new/dir/file.json', JSON.stringify(data, null, 2));
 */
export declare function atomicWriteFile(filePath: string, content: string | Buffer, encoding?: BufferEncoding): Promise<void>;
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