Cursor AI IDE: Advanced Developer Workflow Guide

Why Cursor Leads the AI IDE Space

Cursor started as a VS Code fork and has evolved into the most capable AI-native IDE. Unlike GitHub Copilot (a plugin), Cursor is built AI-first — every feature assumes AI assistance.

Key differentiators:

Composer: Multi-file simultaneous editing

Codebase indexing: Understands your entire project

Custom rules: Team coding standards enforced by AI

Agent mode: Autonomous multi-step task completion

Feature 1: Composer Mode

What it does: Describe a feature; Cursor edits multiple files simultaneously.

Example workflow:

Composer prompt:
"Add a new UserProfile component that:
Fetches user data from /api/users/:id
Displays avatar, name, bio
Has an edit mode with form
Follows our existing component patterns
Includes TypeScript types and unit tests"

Cursor:

Creates UserProfile.tsx with component

Creates UserProfile.test.tsx with tests

Updates index.ts exports

Adds route to router

Creates API types in types.ts

Time: 3 minutes vs. 45 minutes manually.

Feature 2: .cursorrules File

Store your team's coding standards so AI consistently follows them:

.cursorrules
Project: E-commerce Platform
Code Style
TypeScript strict mode always
Functional components only, no class components
Custom hooks for complex logic (>20 lines)
All API calls go through the service layer
File Structure
Components: PascalCase, one per file
Hooks: useXxx.ts in /hooks directory
Services: XxxService.ts in /services
Error Handling
All async functions use try/catch
Errors logged to Sentry with context
User-facing errors use toast notifications
Testing
Minimum 80% coverage for services
Use React Testing Library, not Enzyme
Mock external APIs in tests

Feature 3: Codebase Chat

@codebase queries that work great:

"@codebase How do we handle user permissions?" — explains your RBAC

"@codebase Find all places that call the payment API" — search

"@codebase Why does the UserDashboard component re-render so often?" — debugging

"@codebase What tests are missing for the OrderService?" — gap analysis

Feature 4: Agent Mode

Autonomous multi-step task execution.

Example: Bug Fix Agent

Agent prompt:
"There's a bug where users get logged out when switching tabs. 
Find the root cause, fix it, and add a regression test."

Agent will:

Search codebase for auth token handling

Identify the issue (localStorage vs. sessionStorage)

Make the fix

Run existing tests to verify

Write regression test

Summarize what was done

Supervision required: Review all agent changes before accepting.

Model Selection Strategy

TaskBest ModelWhy

Code completionclaude-3-5-sonnetSpeed + accuracy Architecture questionsclaude-opusReasoning depth Simple fixesGPT-4o miniFast, cheap Multi-file Composerclaude-3-7-sonnetComplex context

Keyboard Shortcuts

ActionShortcut

Open ComposerCmd+I ChatCmd+L Inline editCmd+K Accept suggestionTab Reject suggestionEsc Toggle AICmd+/

Cursor vs. GitHub Copilot

FeatureCursorGitHub Copilot

Multi-file editing✅ Native❌ Workarounds Codebase search✅ Excellent⚠️ Limited Agent mode✅❌ Custom rules✅❌ IDE choiceCursor onlyAny IDE Price$20/mo$10-39/mo

Pricing

Hobby: Free (2000 completions/mo)

Pro: $20/mo (unlimited)

Business: $40/user/mo (teams, privacy)