Cursor Masterclass: Beyond Basic Autocomplete

Most Cursor users only use Tab autocomplete — the feature that suggests code as you type. That's like buying a Swiss Army knife and only using the corkscrew. Cursor has three distinct AI modes, powerful reference commands, and an agent that can handle complex multi-step tasks. Here's how to use all of it.

The Three AI Modes

Tab autocomplete is Mode 1: it predicts what you're about to type and suggests completions. This is good for writing code line by line. Mode 2 is Chat (Cmd+L or Ctrl+L): a side panel where you can ask questions about your code, get explanations, or generate snippets to paste in. Mode 3 is Composer (Cmd+I or Ctrl+I): a powerful mode where the AI can create and edit multiple files simultaneously based on your instructions.

Use Tab for small completions while you're actively writing. Use Chat when you need to understand something or want a quick snippet. Use Composer when you're building features, refactoring, or making changes across multiple files.

The @ Reference System

Cursor's @ references let you point the AI at specific context. This is one of Cursor's strongest features and most people don't know about it.

@file - Reference a specific file: "Look at @utils/helpers.ts and add a new date formatting function"
@folder - Reference an entire directory: "Review all files in @components/auth/ for consistency"
@codebase - Search your entire project: "@codebase where is the user authentication logic defined?"
@docs - Reference documentation: "@docs Next.js explain how server actions work"
@web - Search the web: "@web what's the latest syntax for React Server Components?"

The @codebase reference is particularly powerful. Instead of manually telling the AI which files to look at, @codebase lets it search your entire project for relevant code. This means it can find related functions, existing patterns, and dependencies on its own.

Multi-File Editing with Composer

Composer mode is where Cursor shines for project-level work. Open it with Cmd+I and describe a feature you want to build. Composer will create new files, modify existing ones, and coordinate changes across your project.

Good Composer prompt: "Create a new API route at app/api/settings/route.ts that handles GET and PUT requests for user settings. Update the Settings component in @components/Settings.tsx to fetch settings on load and save changes via the API. Add TypeScript types for the settings object in @types/settings.ts."

Notice how the prompt references specific files with @ symbols and describes the full scope of changes needed. Composer works best when you give it the complete picture upfront.

Agent Mode

Agent mode lets Cursor handle complex multi-step tasks autonomously. It can read files, run terminal commands, install packages, run tests, and fix errors — all without you intervening at each step. Enable it in Composer by selecting the Agent option.

Agent mode works best for tasks like: 'Set up a new authentication system using NextAuth with Google and GitHub providers, create the sign-in page, and add protected route middleware.' The agent will install dependencies, create files, configure settings, and wire everything together.

Custom Rules with .cursorrules

Create a .cursorrules file in your project root to set persistent instructions. This is similar to Claude Code's CLAUDE.md — it tells Cursor about your project's conventions.

# .cursorrules example
You are working on a Next.js 14 app with TypeScript.

Rules:
- Always use server components unless client interactivity is needed
- Use Tailwind CSS for all styling, never inline styles
- Database queries go through Prisma, never raw SQL
- All API responses follow the format: { data: T, error: string | null }
- Write descriptive variable names, no abbreviations

Keyboard Shortcuts Worth Memorizing

These shortcuts save the most time: Cmd+L (Chat panel), Cmd+I (Composer), Cmd+K (inline edit — highlight code and tell AI what to change), Tab (accept autocomplete), Escape (dismiss suggestion), Cmd+Shift+I (toggle Composer panel). The inline edit shortcut Cmd+K is especially useful: select a block of code, press Cmd+K, and type what you want changed. It's faster than Composer for single-file edits.

Getting the Most from Cursor Pro

If you upgrade to Cursor Pro, you get access to faster models and more requests per day. The biggest practical difference is speed — Pro requests complete faster, which makes the iterative cycle of prompt-review-accept-test significantly smoother. For professional use, the time savings typically justify the cost within the first week.