Introduction: Why has Cursor Become the New Favorite Among Programmers?

By 2024 to 2025, if you ask professional developers about their preferred AI programming tool, you will likely hear Cursor mentioned.

This is no coincidence.

As a full-stack engineer, I have transitioned Cursor from a “trial tool” to my “main IDE” over the past six months. From taking over a legacy project with 50,000 lines of code to completing an MVP in a week instead of two, the efficiency boost from Cursor is tangible.

In this practical guide, I will share my best practices:

• What makes Cursor powerful and is it worth $20/month?
• Real-world use cases for three core working modes
• My eight most effective advanced tips
• A complete practical case: Refactoring a complex component using Cursor

If this is your first time hearing about Cursor, I recommend reading on; if you are already using it but feel it’s not as impressive as claimed, I urge you to stick around—you might not have discovered its full potential yet.

1. What is Cursor? A Clear Explanation

Cursor is an AI-native IDE deeply modified from VS Code.

What does this mean?

• Ecosystem Compatibility: All your familiar VS Code plugins, themes, and shortcuts work directly in Cursor.
• Deep AI Integration: It’s not just a simple “AI chat box in the sidebar”; it fundamentally reconstructs the code editing experience.
• Professional Capabilities: Features like Agent mode, context awareness, and shadow workspaces are designed to address real development pain points.

1.1 Why Choose Cursor? My Three Core Reasons

Reason One: It’s the most mature AI IDE available

I have tried Trae, Windsurf, and GitHub Copilot Agent, and the reason I settled on Cursor is simple: it’s the most stable in complex scenarios. When you need to navigate between 20 files or refactor a core module, Cursor’s context understanding and code generation quality are significantly superior.

Reason Two: Migration costs are nearly zero

My previous development environment was based on VS Code configurations, and migrating to Cursor took just 10 minutes—installing, logging in, and syncing settings. All plugins, themes, and shortcuts remained intact.

Reason Three: Reasonable pricing, Pro version is worth it

$20/month may not seem cheap, but let’s do the math: if it saves you 5 hours a month (a conservative estimate), at a programmer’s hourly rate of $50, the ROI is 12.5 times. Not to mention the upgrade in development experience it provides.

1.2 Target Audience and Pricing

My recommendation: If you make a living writing code, go straight for the Pro version. The limitations of the free version will quickly become frustrating.

2. Getting Started Quickly: Entering Work Mode in 5 Minutes

2.1 Download and Installation

Official website: cursor.com

The installation process is almost identical to that of VS Code:

1. Download the installation package for your system (supports Windows/Mac/Linux).
2. Run the installer.
3. Log in on the first launch (supports Google/GitHub accounts).

2.2 Initial Configuration: Three Essential Settings

Open settings (Cmd/Ctrl + ,) and search for the following keywords:

1. AI Model Selection

Setting path: Cursor > Default Model

Recommended choices are claude-3.5-sonnet-20241022 or gpt-4. Claude 3.5 is currently my top choice for code understanding and generation quality, while GPT-4 excels in complex logical reasoning.

2. Enable Tab Completion

Setting path: Cursor > Tab Completion

Make sure to enable “Enable Tab Completion.” This is Cursor’s flagship feature—not just completing the next line but predicting your next 3-5 lines of code.

3. Keyboard Shortcut Preferences

Setting path: Keyboard Shortcuts

If you are migrating from VS Code, it’s recommended to keep the default shortcuts. Cursor’s shortcuts are 99% consistent with VS Code, with the main additions being AI-related features (which will be discussed later).

3. Three Core Modes: When to Use What

Cursor offers three ways to collaborate with AI, each with clear applicable scenarios.

3.1 Chat Mode: Your Personal Technical Advisor

Shortcut: Cmd/Ctrl + L

This is the simplest entry point. Press the shortcut to open the sidebar chat window, where you can ask any question:

Scenario 1: Explain Code

Select a piece of code you don’t understand and input: “Explain what this code does.”

Cursor will analyze it line by line, explaining what each part does. It’s faster than Google search and more accurate than reading documentation.

Scenario 2: Error Troubleshooting

Copy the error message from the terminal into the Chat box, and Cursor will:

1. Analyze the cause of the error.
2. Point out the possible files and line numbers where the error occurred.
3. Provide suggestions for fixing it (even directly offering corrected code).

Scenario 3: Code Conversion

“Help me convert this Python code to JavaScript.” “Change this callback style to async/await.”

Chat mode is like having a full-stack expert sitting next to you, ready to assist.

3.2 Composer Mode: The Cross-File Refactoring Tool

Shortcut: Cmd/Ctrl + I

This is the feature that surprised me the most. When you need to modify code scattered across multiple files, Composer helps you coordinate everything.

Real Case: Refactoring API Interfaces

In a project I took over, all API calls were written in components without a unified encapsulation. I needed to:

1. Create a new api/ directory.
2. Split API functions by module.
3. Update all references to the old code.
4. Maintain the same functionality.

Steps to Operate:

1. Press Cmd/Ctrl + I to open Composer.
2. Input the requirements:

I need to refactor the API calling logic for the project:

1. Create an api/ directory containing user.js and post.js.
2. Organize the current scattered API calls into it.
3. Use a unified request encapsulation (based on axios).
4. Update all calling locations to reference the new API modules.
5. Maintain the original functionality.

The files involved include:
- src/components/UserProfile.vue
- src/components/PostList.vue  
- src/pages/Home.vue
- src/pages/Profile.vue

3. Cursor will analyze the requirements and provide an execution plan.
4. After confirmation, it will:
5. Create new files.
6. Extract API logic.
7. Rewrite all references.
8. Show the complete diff.

Key Advantage: Composer doesn’t change one thing at a time; it takes a holistic approach to get it done in one go. My refactoring involved 8 files, which would have taken 2 hours manually, but Composer completed it in 15 minutes with zero bugs.

3.3 Agent Mode: The AI Programmer Steps In

Activation Method: Select “Agent” mode on the left side of the Chat input box.

Agent mode is a powerful feature launched by Cursor at the end of 2024. If Chat is the “advisor” and Composer is the “architect,” then Agent is the “all-round programmer.”

What Can Agent Do?

• Read and understand the architecture of the entire codebase.
• Independently plan multi-step tasks.
• Create, modify, and delete files.
• Run terminal commands (npm install, git commit, etc.).
• Run tests and debug code.

Real Case: Adding User Authentication

I needed to add a complete user authentication system to the project: login, registration, JWT Token management, and protected routes.

Steps to Operate:

1. Switch to Agent mode.
2. Input the requirements:

Add a complete user authentication system to this project:

Backend (Node.js + Express):
1. Create /auth/register and /auth/login endpoints.
2. Use bcrypt to hash passwords.
3. Use JWT to generate tokens with a validity of 7 days.
4. Create middleware to validate tokens.

Frontend (Vue3):
1. Create login and registration pages.
2. Use Pinia to manage login state.
3. Implement route guards to redirect unauthenticated users to the login page.
4. Store the token in localStorage after login.

Other requirements:
- Use the existing project’s coding style.
- All API errors need to be handled uniformly.
- Add basic form validation.

3. The Agent will start working:
4. First, analyze the existing project structure.
5. Check for dependencies like express, bcrypt, jsonwebtoken, etc.
6. If any are missing, run npm install to install them.
7. Create backend routes and middleware.
8. Create frontend pages and store.
9. Update routing configuration.
10. Run tests for validation.
11. You can watch the entire process in “real-time live”, with each action requiring your confirmation to execute.

Result: After 20 minutes, a complete authentication system was set up. I just needed to review the code and make minor style adjustments before it was ready to use.

Usage Recommendations for Agent Mode:

• Suitable for: Tasks with clear requirements and established patterns (e.g., “Add CRUD endpoints,” “Implement payment functionality”).
• Not suitable for: Creative work requiring extensive design decisions.
• Best Practice: Break large tasks into smaller ones, review each step, and avoid giving too many requirements at once.

4. Eight Advanced Tips: Double Your Efficiency with Cursor

Tip 1: Context Magic with the @ Symbol

In the Chat or Composer input box, typing @ will bring up a context selection menu:

• @filename — Reference the entire content of a specific file.
• @folder/ — Reference an entire folder.
• @functionname — Reference a specific function.
• @currentfile — Reference the currently opened file.
• @terminal — Reference terminal output.
• @document — Reference official documentation.

Practical Usage:

“Help me add a method to @userService.js that finds a user by email, referencing the error handling in @auth.js.”

This way, Cursor can accurately understand your request, generating code that better fits the project style.

Tip 2: Hidden Features of Tab Completion

Cursor’s Tab completion is not just about writing the next line; it has the following advanced uses:

Multi-line Prediction: Pressing Tab once, Cursor may write 3-5 lines of code. If the prediction is accurate, pressing Tab repeatedly can quickly advance.

Smart Naming: When writing a function, just type “function” and Cursor will suggest the most suitable function name based on context.

Comment-Driven: Write a comment describing what you want, press Tab, and Cursor will generate the corresponding code.

// Write a function that receives a user ID and returns a list of user orders, sorted by time in descending order.
[Press Tab]
↓
async function getUserOrders(userId) {
  const orders = await db.orders.find({ userId })
    .sort({ createdAt: -1 })
    .toArray();
  return orders;
}

Tip 3: Code Snippet Collection

When you encounter good code snippets generated by AI, right-click → “Add to Snippets” for easy access later.

Tip 4: Shadow Workspace

This is Cursor’s killer feature that many people are unaware of.

Scenario: You want the AI to try a refactoring plan but are worried about messing up the existing code.

Operation:

1. Click the “Shadow” button in the lower right corner.
2. All AI modifications occur in the “shadow”.
3. You can preview the effects in the shadow workspace.
4. If satisfied, click “Apply”; if not, click “Discard”.

This is like a temporary branch in Git but faster and lighter than switching branches.

Tip 5: Terminal Integration

Cursor has a built-in terminal (Cmd/Ctrl + `), and the AI can run commands directly:

• Help me run tests → AI executes npm test.
• Deploy to staging environment → AI executes the deployment script.
• View recent commits → AI executes git log –oneline -10.

Moreover, if a command fails, paste the error to the AI, and it can help troubleshoot.

Tip 6: Precise Modifications with Diff Mode

Sometimes the code generated by AI isn’t entirely correct, but you don’t want to rewrite it completely.

Operation: Select the code → Input modification requirements → Cursor will display changes in Diff format.

You can choose to “accept” or “reject” each change line by line, allowing precise control over every modification.

Tip 7: Custom System Prompts

In settings, find Cursor > System Prompt, where you can add custom prompts to help the AI better understand your preferences:

My project uses Vue3 + TypeScript + Pinia.
Code style requirements:
- Use Composition API.
- Type definitions must be complete, avoid any.
- Asynchronous operations must use try-catch for error handling.
- Prefer async/await, minimize Promise chains.

This way, every time you chat, the AI will generate code in this style.

Tip 8: Version Rollback

Cursor automatically saves the history of every AI modification. Click the “clock” icon on the right side of the code to view and roll back to any historical version.

This is more granular than Git—even if you haven’t committed, you can recover the code state from 10 minutes ago.

5. Complete Practical Case: Refactoring a Complex Form Component

Having covered the theory, let’s look at a complete case. This is a scenario I encountered in a real project.

5.1 Project Background

Current Situation: A 400+ line Vue form component with functionalities including:

• User information editing (name, email, phone)
• Address management (can add multiple addresses)
• Avatar upload
• Form validation
• Auto-saving drafts

Pain Points: