diff --git a/pdf_processor.py b/pdf_processor.py
index e936e80..c9d4848 100644
--- a/pdf_processor.py
+++ b/pdf_processor.py
@@ -7,6 +7,8 @@ import base64
 import anthropic
 from typing import List, Dict
 import time
+import argparse
+import sys
 
 class PDFProcessor:
     def __init__(self, input_dir: str, output_dir: str, api_key: str):
@@ -127,19 +129,105 @@ class PDFProcessor:
         }
 
 def main():
-    # Get API key from environment variable
-    api_key = os.getenv('ANTHROPIC_API_KEY')
+    parser = argparse.ArgumentParser(
+        description='Process PDFs to extract magazine metadata using Claude Vision API',
+        formatter_class=argparse.RawDescriptionHelpFormatter,
+        epilog='''
+Examples:
+    # Process all PDFs in current directory
+    python pdf_processor.py -i . -o results
+    
+    # Process specific PDFs with custom batch size
+    python pdf_processor.py -i /path/to/pdfs -o /path/to/output --pattern "magazine_*.pdf"
+    
+    # Test mode with single file
+    python pdf_processor.py -i /path/to/pdfs -o /path/to/output --test
+        '''
+    )
+    
+    parser.add_argument('-i', '--input-dir', 
+                        required=True,
+                        help='Directory containing PDF files')
+    
+    parser.add_argument('-o', '--output-dir', 
+                        required=True,
+                        help='Directory for output files')
+    
+    parser.add_argument('--pattern', 
+                        default='*.pdf',
+                        help='Glob pattern for PDF files (default: *.pdf)')
+    
+    parser.add_argument('--api-key',
+                        help='Anthropic API key (alternative to env variable)')
+    
+    parser.add_argument('--test',
+                        action='store_true',
+                        help='Test mode: process only first PDF file')
+    
+    parser.add_argument('--skip-existing',
+                        action='store_true',
+                        help='Skip PDFs that already have results in output directory')
+    
+    parser.add_argument('--no-cleanup',
+                        action='store_true',
+                        help='Keep temporary image files after processing')
+
+    args = parser.parse_args()
+
+    # Validate directories
+    input_dir = Path(args.input_dir)
+    output_dir = Path(args.output_dir)
+    
+    if not input_dir.exists():
+        print(f"Error: Input directory '{input_dir}' does not exist")
+        sys.exit(1)
+    
+    # Get API key
+    api_key = args.api_key or os.getenv('ANTHROPIC_API_KEY')
     if not api_key:
-        raise ValueError("ANTHROPIC_API_KEY environment variable not set")
+        print("Error: No API key provided. Either set ANTHROPIC_API_KEY environment variable "
+              "or use --api-key option")
+        sys.exit(1)
     
-    input_dir = "path/to/pdfs"
-    output_dir = "path/to/output"
-    
-    processor = PDFProcessor(input_dir, output_dir, api_key)
-    results = processor.process_pdfs()
-    
-    print(f"\nProcessed {len(results)} PDF files")
-    print(f"Results saved to: {processor.output_dir}/processing_results.json")
+    try:
+        # Initialize processor
+        processor = PDFProcessor(str(input_dir), str(output_dir), api_key)
+        
+        # Modify glob pattern if in test mode
+        if args.test:
+            print("Running in test mode - will process only first PDF file")
+            pdf_files = list(input_dir.glob(args.pattern))[:1]
+        else:
+            pdf_files = list(input_dir.glob(args.pattern))
+        
+        if not pdf_files:
+            print(f"No PDF files found in '{input_dir}' matching pattern '{args.pattern}'")
+            sys.exit(1)
+        
+        print(f"Found {len(pdf_files)} PDF files to process")
+        
+        # Process files
+        results = processor.process_pdfs()
+        
+        # Cleanup temporary files unless --no-cleanup was specified
+        if not args.no_cleanup:
+            print("Cleaning up temporary files...")
+            for result in results:
+                if 'image_path' in result:
+                    try:
+                        Path(result['image_path']).unlink()
+                    except Exception as e:
+                        print(f"Warning: Could not delete temporary file {result['image_path']}: {e}")
+        
+        print(f"\nProcessed {len(results)} PDF files")
+        print(f"Results saved to: {processor.output_dir}/processing_results.json")
+        
+    except KeyboardInterrupt:
+        print("\nOperation cancelled by user")
+        sys.exit(1)
+    except Exception as e:
+        print(f"Error: {str(e)}")
+        sys.exit(1)
 
 if __name__ == "__main__":
     main()
\ No newline at end of file