claudecode.nvim

Based on your request to implement a user authentication system in Python using Flask, here's the solution generated through claudecode.nvim:

```python
# app.py
from flask import Flask, request, jsonify
from werkzeug.security import generate_password_hash, check_password_hash

app = Flask(__name__)

# In-memory user storage for demonstration
users = {}

@app.route('/register', methods=['POST'])
def register():
    data = request.get_json()
    username = data.get('username')
    password = data.get('password')
    
    if username in users:
        return jsonify({'message': 'User already exists'}), 400
    
    users[username] = {
        'password_hash': generate_password_hash(password),
        'authenticated': False
    }
    return jsonify({'message': 'User created successfully'}), 201

@app.route('/login', methods=['POST'])
def login():
    data = request.get_json()
    username = data.get('username')
    password = data.get('password')
    
    if username not in users or not check_password_hash(users[username]['password_hash'], password):
        return jsonify({'message': 'Invalid credentials'}), 401
    
    users[username]['authenticated'] = True
    return jsonify({'message': 'Login successful'}), 200

@app.route('/protected', methods=['GET'])
def protected():
    username = request.args.get('username')
    
    if username not in users or not users[username]['authenticated']:
        return jsonify({'message': 'Unauthorized'}), 401
    
    return jsonify({'message': 'Access granted to protected resource'}), 200

if __name__ == '__main__':
    app.run(debug=True)
```

The claudecode.nvim interface provided real-time suggestions and code completions as I built this authentication system. It helped me quickly implement secure password hashing, user registration, login functionality, and a protected route. The AI assistant suggested best practices like using Werkzeug's security functions and proper HTTP status codes.