Dynamic Reasoning with Sonnet 3.7 🧠

Check out the official announcement about these improvements on Twitter!

Claude 3.7 Sonnet brings powerful dynamic reasoning capabilities to Bolt.new, enabling more intelligent and context-aware development assistance. Let’s explore how to leverage these capabilities effectively.

Understanding Dynamic Reasoning

Dynamic reasoning allows Claude to:

• Analyze complex code relationships
• Understand architectural implications
• Suggest optimal solutions
• Adapt to your coding style

Key Capabilities

1. Context Analysis

// Claude can understand relationships between components
interface UserContext {
  user: User | null;
  loading: boolean;
  error: Error | null;
}

// And suggest appropriate implementations
const UserProvider: React.FC<{ children: React.ReactNode }> = ({ children }) => {
  const [state, setState] = useState<UserContext>({
    user: null,
    loading: true,
    error: null
  });

  // Claude understands the need for proper cleanup
  useEffect(() => {
    let mounted = true;

    async function loadUser() {
      try {
        const user = await fetchUser();
        if (mounted) {
          setState({ user, loading: false, error: null });
        }
      } catch (error) {
        if (mounted) {
          setState({ user: null, loading: false, error });
        }
      }
    }

    loadUser();
    return () => { mounted = false };
  }, []);

  return (
    <UserContext.Provider value={state}>
      {children}
    </UserContext.Provider>
  );
};

2. Pattern Recognition

Claude can identify and suggest improvements to common patterns:

// Before: Basic error handling
try {
  await saveData(data);
} catch (error) {
  console.error(error);
}

// After: Comprehensive error handling pattern
try {
  await saveData(data);
} catch (error) {
  if (error instanceof NetworkError) {
    await retryWithBackoff(saveData, data);
  } else if (error instanceof ValidationError) {
    await handleValidationError(error);
  } else {
    captureException(error);
    showUserFriendlyError();
  }
}

3. Architectural Understanding

Claude can suggest appropriate architectural decisions:

// Understanding when to use different state management approaches
// Local State
function SimpleCounter() {
  const [count, setCount] = useState(0);
  return <button onClick={() => setCount(c => c + 1)}>{count}</button>;
}

// Context API
function ComplexStateManager() {
  const [state, dispatch] = useReducer(reducer, initialState);
  return (
    <StateContext.Provider value={{ state, dispatch }}>
      {/* Complex component tree */}
    </StateContext.Provider>
  );
}

// External State Management
const store = createStore({
  state: initialState,
  reducers: {
    // Complex state logic
  }
});

Leveraging Dynamic Reasoning

1. Code Reviews

Ask Claude to review your code with specific focus areas:

"Please review this authentication implementation for:
1. Security best practices
2. Error handling
3. Performance implications
4. State management
5. Type safety"

2. Architecture Decisions

Get help with architectural decisions:

"I'm building a real-time chat application. 
Should I use WebSocket or Server-Sent Events? 
Consider:
- Scale requirements
- Browser support
- Real-time needs
- Server resources"

3. Problem Solving

Present problems with context:

"Users report slow performance when:
1. Loading large lists
2. Filtering data
3. Switching views

Current implementation:
[code snippet]

How can we optimize this?"

Best Practices

1. Provide Context

// GOOD: Context included
"This authentication service handles OAuth2 flow:
interface AuthService {
  login(): Promise<User>;
  logout(): Promise<void>;
  refreshToken(): Promise<string>;
}

How should we handle token expiration?"

// BAD: No context
"How should we handle authentication?"

2. Specify Constraints

"Need to implement caching with these requirements:
- Must work offline
- Maximum 50MB storage
- Expire after 24 hours
- Support binary data"

3. Iterate Solutions

1. Start simple:
   "Basic implementation of user registration"

2. Add complexity:
   "Add email verification to registration"

3. Enhance:
   "Implement password strength requirements"

4. Optimize:
   "Add rate limiting and security measures"

Common Scenarios

1. Performance Optimization

// Claude can suggest optimizations:
function OptimizedList({ items }: { items: Item[] }) {
  // Memoize expensive calculations
  const sortedItems = useMemo(() => 
    items.sort((a, b) => b.priority - a.priority),
    [items]
  );

  // Virtualize long lists
  return (
    <VirtualList
      height={400}
      itemCount={sortedItems.length}
      itemSize={50}
      width={600}
    >
      {({ index, style }) => (
        <ListItem
          item={sortedItems[index]}
          style={style}
        />
      )}
    </VirtualList>
  );
}

2. State Management

// Claude understands when to use different patterns
function TodoList() {
  // Local state for UI
  const [filter, setFilter] = useState('all');
  
  // Global state for data
  const { todos, addTodo, removeTodo } = useTodoStore();
  
  // Derived state
  const filteredTodos = useMemo(() => 
    todos.filter(todo => 
      filter === 'all' ? true : todo.status === filter
    ),
    [todos, filter]
  );

  return (
    // Implementation
  );
}

3. Error Boundaries

class ErrorBoundary extends React.Component {
  state = { hasError: false, error: null };

  static getDerivedStateFromError(error) {
    return { hasError: true, error };
  }

  componentDidCatch(error, errorInfo) {
    // Claude suggests appropriate error handling
    logError(error, errorInfo);
    captureException(error);
  }

  render() {
    if (this.state.hasError) {
      return <ErrorFallback error={this.state.error} />;
    }
    return this.props.children;
  }
}

Remember

• Provide clear context
• Specify requirements
• Iterate on solutions
• Test edge cases
• Review suggestions carefully

Need help maximizing these capabilities? Check out our Advanced Support options!