How to Use Cursor AI in 2026 — Setup, Features & Real Coding Workflows

Cursor scored 87/100 in our testing — the highest score of any coding tool we've reviewed. The reason isn't any single feature. It's that Cursor understands your entire codebase as context, not just the file you're editing.

Here's how to actually use it.

Setup (5 minutes)

1. Download from cursor.com — it's a VS Code fork, so your extensions transfer automatically
2. Sign in and choose a plan (Free: 2,000 completions/mo; Pro: $20/mo unlimited)
3. Open Settings → Cursor Settings to configure your AI model (default is Claude Sonnet + GPT-4o)
4. Import your VS Code settings: Command Palette → Import VS Code Settings

First thing to configure: Cursor Rules. Go to Settings → Rules for AI and add your project-specific instructions:

- Use TypeScript strict mode
- Follow the existing naming conventions in the codebase
- Prefer functional components in React
- Always add types, never use 'any'

This applies your preferences to every AI interaction without having to repeat them.

The 4 Core Features

1. Tab Completion (Autopilot)

Tab completion in Cursor isn't just autocomplete — it predicts multi-line changes across your file.

How it works: As you type or edit, Cursor predicts what you want to do next and shows a greyed-out suggestion. Press Tab to accept, Esc to reject.

Where it shines:

• Completing repetitive patterns (config objects, test cases, prop types)
• Continuing a function after you write the first few lines
• Adapting to your style after a few accepts

Tip: The more you use it in a project, the better it gets — it learns your patterns.

2. Cmd+K — Inline Editing

Cmd+K (Ctrl+K on Windows) opens an inline prompt. Select code and describe what you want to change.

Common uses:

Refactor this function to use async/await instead of callbacks

Add error handling for the case where the API returns null

Convert this class component to a functional component with hooks

Cursor shows the diff before applying — accept or reject with one click.

Pro tip: For small, precise edits, Cmd+K is faster than the chat. For complex multi-file changes, use Agent mode.

3. Cmd+L — Codebase Chat

Cmd+L opens a chat panel that has context about your entire codebase, not just the current file.

Useful prompts:

@codebase Where is user authentication handled? Walk me through the flow.

@codebase This function is slow. What's the bottleneck and how would you fix it?

@docs How do I use the useQuery hook in React Query v5?

The @ symbols reference different contexts:

• @codebase — your entire project
• @docs — external documentation (you add URLs)
• @file — a specific file
• @web — real-time web search

4. Agent Mode — Autonomous Code Changes

Agent mode is Cursor's most powerful feature. You describe a task; Cursor plans and executes multi-file changes autonomously.

To use: Open chat (Cmd+L) → toggle Agent in the top right.

Example prompts:

Add dark mode support to this Next.js app. Use CSS variables and a toggle in the header.

Write unit tests for the UserService class. Cover happy path and the three error cases in the function comments.

Refactor the API calls in /services to use a centralized error handler and retry logic.

When to use Agent vs Cmd+K:

• Agent: Multi-file changes, new features, refactoring across the codebase
• Cmd+K: Single-function edits, quick fixes, style changes

Settings That Make the Biggest Difference

Model selection: For most tasks, Claude Sonnet 3.5 gives the best code quality. Switch to GPT-4o for complex reasoning tasks. Cursor rotates models automatically on the Pro plan.

Context window: Settings → Advanced → increase context length. More context = better codebase understanding but slower responses.

Docs integration: Add your framework's docs URL in Settings → Docs. Cursor will reference them when you use @docs.

.cursorrules file: Create a .cursorrules file in your project root with project-specific AI instructions. This overrides your global settings for that project.

Common Workflows

Onboarding to a New Codebase

@codebase Explain the architecture of this project. What are the main modules and how do they interact?

Debugging

@file [paste error] — this error is happening in this function. What's the root cause and fix?

Code Review

@file Review this PR diff for potential bugs, security issues, and performance problems.

Documentation

Write JSDoc comments for all the exported functions in this file. Be concise.

Limitations

• Agent mode occasionally makes wrong assumptions — always review diffs before accepting
• Context window has limits on very large codebases — break complex tasks into smaller steps
• Doesn't have internet access by default — use @web to pull in current docs or search

See also: Cursor review → | GitHub Copilot review → | Cursor alternatives →