Windsurf — User Guide
Codeium IDE; Cascade agents.
Strengths
- Cascade agents autonomously perform multi-step programming tasks
- Have a deep understanding of the entire code base, not just the current file
- Based on VS Code, low migration cost and plug-in compatibility
- The free version has a generous quota and is suitable for individual developers.
- Supports multiple AI models (Claude, GPT-4o, etc.)
Best for
- End-to-end implementation of complex functionality (from requirements to code)
- Refactoring and optimization of large code bases
- Bug fixes and code reviews
- Automatically generate test cases
- Code documentation generation
Cascade agent usage
Cascade is a core feature of Windsurf that allows you to understand and modify code like a real developer colleague.
Let Cascade implement a complete function
(Open the project in Windsurf, using the Cascade panel) "Please add a user authentication function to my React project, requiring: - Use JWT for authentication - Contains login, registration, and logout pages - Add routing protection (jump to login page if not logged in) - Use React Context to manage authentication status - Consistent with existing API style"
Cascade will:
First analyze the existing code base structure and API style
Create the required component files
Modify routing configuration
Add Context and Hook
Update relevant existing documents
The entire process is automated and every step is explained.
Cascade will actively read your code base and understand the project structure before starting to avoid conflicts with existing code.
Fix complex bugs
"My app has a race condition when the user clicks a button quickly. This results in inconsistent data status. Please help me find the problem and fix it. "
Cascade will:
Search for relevant event handling code
Identify the root cause of the race condition
Propose a repair plan (such as using useRef for anti-shake, AbortController to cancel the request)
Automatically modify related files
Explain the principle of repair
The more specific the triggering conditions that describe the bug, the more accurately Cascade can locate the problem.
Code base understanding and refactoring
Windsurf has a deep understanding of the entire code base and is suitable for refactoring tasks on large projects.
Refactor old code to conform to new architectural specifications
"Our project is going to migrate from Class Components to Function Components + Hooks, Please help me refactor the src/components/UserProfile.jsx file, And ensure that the functionality is completely consistent, while adding TypeScript type annotations. "
Windsurf will:
Analyze the state and life cycle methods of the original Class Component
Convert state to useState/useReducer
Convert lifecycle methods to useEffect
Add complete TypeScript type definitions
Keep the component’s props interface unchanged
Inform the target specification (such as TypeScript, Hooks, etc.) when refactoring, and Windsurf will maintain code style consistency.
Automatically generate tests
Windsurf can analyze code logic and automatically generate test cases with high coverage.
Generate unit tests for existing functions
"Please generate unit tests for all functions in src/utils/dataProcessor.ts, Using Jest + Testing Library, Requirements cover normal cases, edge cases, and error cases. "
Generate a complete test file, including:
Multiple test cases for each function
Expected output test for normal input
Boundary value testing (empty array, null, maximum value, etc.)
Error situation testing (scenarios where exceptions are thrown)
Test coverage typically reaches 80%+.
Let Windsurf analyze the input and output of the function first, and then generate tests to achieve higher coverage.
Compared with similar tools
| Tool | Strength | Best for | Pricing |
|---|---|---|---|
| Windsurf This tool | Cascade agents autonomously perform complex tasks and have a deep understanding of the code base | Developers who need AI to autonomously complete complex programming tasks | Free version / Pro $15/month |
| Cursor | Conversational programming experience is excellent and the community is more active | Getting used to conversational programming requires rich community resources | Free version / Pro $20/month |
| GitHub Copilot | The industry benchmark for code completion, VS Code is the most mature integration | Need stable and reliable code completion for enterprise users | Individual $10/month / Business $19/month |
| Codeium | Completely free, supports more IDEs | Limited budget, multiple IDE support required | completely free |
Sources & references:
- Windsurf official website (2025-03)
- Windsurf usage documentation (2025-03)