diff --git a/clean_code_example.py b/clean_code_example.py
new file mode 100644
index 0000000..ab3c8cf
--- /dev/null
+++ b/clean_code_example.py
@@ -0,0 +1,231 @@
+"""
+Clean Code Example - Demonstrates best practices for Python development.
+
+This module contains examples of clean, secure, and well-structured Python code
+that should pass all code review checks.
+"""
+
+import logging
+import hashlib
+import secrets
+from typing import List, Dict, Optional
+from dataclasses import dataclass
+from pathlib import Path
+
+
+# Constants
+MAX_RETRY_ATTEMPTS = 3
+DEFAULT_TIMEOUT = 30
+HASH_ALGORITHM = "sha256"
+
+
+@dataclass
+class User:
+    """User data class with proper validation."""
+    username: str
+    email: str
+    is_active: bool = True
+    
+    def __post_init__(self):
+        """Validate user data after initialization."""
+        if not self.username or len(self.username) < 3:
+            raise ValueError("Username must be at least 3 characters long")
+        if "@" not in self.email:
+            raise ValueError("Invalid email format")
+
+
+class SecurePasswordManager:
+    """Secure password management with proper hashing."""
+    
+    def __init__(self):
+        self.logger = logging.getLogger(__name__)
+    
+    def hash_password(self, password: str) -> str:
+        """Hash password using secure salt and algorithm."""
+        if not password:
+            raise ValueError("Password cannot be empty")
+        
+        # Generate secure random salt
+        salt = secrets.token_hex(32)
+        
+        # Hash password with salt
+        password_hash = hashlib.pbkdf2_hmac(
+            HASH_ALGORITHM,
+            password.encode('utf-8'),
+            salt.encode('utf-8'),
+            100000  # iterations
+        )
+        
+        return f"{salt}:{password_hash.hex()}"
+    
+    def verify_password(self, password: str, stored_hash: str) -> bool:
+        """Verify password against stored hash."""
+        try:
+            salt, hash_hex = stored_hash.split(':')
+            password_hash = hashlib.pbkdf2_hmac(
+                HASH_ALGORITHM,
+                password.encode('utf-8'),
+                salt.encode('utf-8'),
+                100000
+            )
+            return secrets.compare_digest(hash_hex, password_hash.hex())
+        except (ValueError, TypeError):
+            self.logger.warning("Invalid hash format during verification")
+            return False
+
+
+class DatabaseConnection:
+    """Secure database connection with proper error handling."""
+    
+    def __init__(self, connection_string: str):
+        self.connection_string = connection_string
+        self.logger = logging.getLogger(__name__)
+    
+    def execute_query(self, query: str, parameters: Optional[Dict] = None) -> List[Dict]:
+        """Execute parameterized query safely."""
+        if not query.strip():
+            raise ValueError("Query cannot be empty")
+        
+        # Validate query doesn't contain dangerous patterns
+        dangerous_patterns = ['DROP', 'DELETE', 'UPDATE', 'INSERT', 'EXEC']
+        query_upper = query.upper()
+        
+        for pattern in dangerous_patterns:
+            if pattern in query_upper:
+                raise ValueError(f"Dangerous SQL pattern detected: {pattern}")
+        
+        try:
+            # Simulate safe database execution
+            self.logger.info(f"Executing query: {query[:50]}...")
+            return []  # Mock result
+        except Exception as e:
+            self.logger.error(f"Database error: {str(e)}")
+            raise
+    
+    def close(self):
+        """Close database connection safely."""
+        self.logger.info("Closing database connection")
+
+
+class FileManager:
+    """Secure file operations with proper validation."""
+    
+    def __init__(self, base_path: str):
+        self.base_path = Path(base_path).resolve()
+        self.logger = logging.getLogger(__name__)
+    
+    def read_file(self, filename: str) -> str:
+        """Read file with path traversal protection."""
+        # Validate filename
+        if not filename or '..' in filename or filename.startswith('/'):
+            raise ValueError("Invalid filename")
+        
+        file_path = self.base_path / filename
+        
+        # Ensure file is within base path
+        try:
+            file_path.resolve().relative_to(self.base_path)
+        except ValueError:
+            raise ValueError("Path traversal attempt detected")
+        
+        try:
+            return file_path.read_text(encoding='utf-8')
+        except FileNotFoundError:
+            self.logger.warning(f"File not found: {filename}")
+            raise
+        except Exception as e:
+            self.logger.error(f"Error reading file {filename}: {str(e)}")
+            raise
+    
+    def write_file(self, filename: str, content: str) -> None:
+        """Write file with proper validation."""
+        if not filename or '..' in filename or filename.startswith('/'):
+            raise ValueError("Invalid filename")
+        
+        file_path = self.base_path / filename
+        
+        try:
+            file_path.resolve().relative_to(self.base_path)
+        except ValueError:
+            raise ValueError("Path traversal attempt detected")
+        
+        try:
+            file_path.write_text(content, encoding='utf-8')
+            self.logger.info(f"Successfully wrote file: {filename}")
+        except Exception as e:
+            self.logger.error(f"Error writing file {filename}: {str(e)}")
+            raise
+
+
+def calculate_fibonacci(n: int) -> int:
+    """Calculate nth Fibonacci number efficiently."""
+    if n < 0:
+        raise ValueError("Fibonacci sequence is not defined for negative numbers")
+    
+    if n <= 1:
+        return n
+    
+    a, b = 0, 1
+    for _ in range(2, n + 1):
+        a, b = b, a + b
+    
+    return b
+
+
+def process_user_data(users: List[User]) -> Dict[str, int]:
+    """Process user data with proper error handling."""
+    if not users:
+        return {"total": 0, "active": 0}
+    
+    try:
+        total_users = len(users)
+        active_users = sum(1 for user in users if user.is_active)
+        
+        return {
+            "total": total_users,
+            "active": active_users,
+            "inactive": total_users - active_users
+        }
+    except Exception as e:
+        logging.getLogger(__name__).error(f"Error processing user data: {str(e)}")
+        raise
+
+
+def main():
+    """Main function demonstrating clean code usage."""
+    logging.basicConfig(level=logging.INFO)
+    
+    try:
+        # Create secure password manager
+        password_manager = SecurePasswordManager()
+        
+        # Hash a password
+        password_hash = password_manager.hash_password("secure_password_123")
+        print(f"Password hashed successfully")
+        
+        # Verify password
+        is_valid = password_manager.verify_password("secure_password_123", password_hash)
+        print(f"Password verification: {'Success' if is_valid else 'Failed'}")
+        
+        # Create user
+        user = User("john_doe", "john@example.com")
+        print(f"User created: {user.username}")
+        
+        # Calculate Fibonacci
+        fib_result = calculate_fibonacci(10)
+        print(f"Fibonacci(10) = {fib_result}")
+        
+        # Process user data
+        users = [user, User("jane_doe", "jane@example.com", False)]
+        stats = process_user_data(users)
+        print(f"User statistics: {stats}")
+        
+    except Exception as e:
+        logging.error(f"Application error: {str(e)}")
+        return 1
+    
+    return 0
+
+
+if __name__ == "__main__":
+    exit(main())
diff --git a/clean_requirements.txt b/clean_requirements.txt
new file mode 100644
index 0000000..5899bb0
--- /dev/null
+++ b/clean_requirements.txt
@@ -0,0 +1,6 @@
+# Clean requirements file with secure, up-to-date packages
+requests>=2.31.0,<3.0.0
+cryptography>=41.0.0
+pydantic>=2.0.0,<3.0.0
+python-dateutil>=2.8.0
+typing-extensions>=4.5.0
diff --git a/requirements.txt b/requirements.txt
index df9b822..831ea93 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,5 +2,4 @@ requests
 pygments
 groq
 safety
-bandit
-cve-search-api
\ No newline at end of file
+bandit
\ No newline at end of file