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Vibe Coding · レッスン

AIエディター：CursorとWindsurf

プロジェクトを理解するAIネイティブなコードエディターを学びます。

「AIエディター：CursorとWindsurf」はCoddyKit上の無料Vibe Codingレッスンです。 これはレッスン1/4です。 下記で完全なレッスンを無料で読むことができます。その後、ブラウザ内の組み込みコードエディタと24時間対応のAIチューターでハンズオン演習できます。 これはVibe Coding学習パスの一部であり、ウェブとCoddyKitアプリ全体で進捗が同期されます。 Vibe Codingコースには全4レッスンが含まれています。

このレッスンの一部はまだ翻訳されておらず、英語で表示されています。

Meet the AI Editor

An AI editor is where you actually build. It looks like a normal code editor, but it has an AI baked right in that can read your whole project, answer questions, and write code for you.

The two most popular ones for vibe coding are Cursor and Windsurf. Both are forks of VS Code, so they feel familiar even if you've never coded — and the AI does most of the typing.

Why Not Just Use ChatGPT?

A chat window can write code, but it can't see your files. You end up copy-pasting back and forth and losing context.

An AI editor like Cursor lives inside your actual project. It knows your files, can edit them in place, and remembers what you're building. That tight loop — describe, generate, review, repeat — is the heart of vibe coding.

Cursor at a Glance

Cursor is the most popular AI-native editor. Its killer feature is a chat panel that understands your codebase. You press a shortcut, describe what you want, and it edits the right files for you.

You can point it at specific files with @ mentions so it focuses on exactly what matters. Here is the kind of prompt you'd type inside Cursor.

In Cursor's chat, you might type:

"@index.html Add a centered heading that says 'My First App' and a button below it labeled 'Click Me'. Keep the styling simple."

Inline Edits with Cursor

Beyond chat, Cursor lets you select code and ask for a change right where it lives. Highlight a block, press the edit shortcut, and describe the tweak in plain English.

This is perfect for small, surgical changes — like 'make this red' or 'add a loading message' — without rewriting the whole file.

Select a button, press Cmd/Ctrl+K, then type:

"Make this button bigger, give it rounded corners, and a purple background."

Windsurf: The Other Big Player

Windsurf (by Codeium) is Cursor's main rival. It's also a VS Code fork with deep AI built in.

Its standout feature is Cascade — an agent that can plan and carry out multi-step changes across many files, narrating what it's doing as it goes. Great when a request touches more than one file.

Cursor vs Windsurf

Both are excellent. The differences are mostly feel and pricing:

  • Cursor — extremely popular, huge community, polished chat and inline edits.
  • Windsurf — smooth agentic flows with Cascade, clean interface, often a generous free tier.

You don't need both. Pick one, learn its shortcuts, and stick with it for a while.

The @ Context Trick

The single most important habit in any AI editor: give it context. Both Cursor and Windsurf let you reference files, folders, or docs with the @ symbol.

When the AI can see the right files, it stops guessing and starts building exactly what you mean.

"@styles.css @index.html The button on the home page should match the dark theme in styles.css. Update both files to keep them consistent."

Watching AI Edit Your Files

When you accept a suggestion, the editor shows a diff — green lines added, red lines removed. You review it, then click Accept or Reject.

This is your safety net. You stay in control: the AI proposes, you approve. Always glance at the diff before accepting, especially as files grow.

A Tiny Taste of the Output

To make this concrete: if you asked Cursor for a button that greets you, it might generate the JavaScript below. You don't have to write it — but it's nice to recognize what the AI produced.

function greet() {
  const name = "builder";
  console.log("Hello, " + name + "! Welcome to vibe coding.");
}

greet();

Models Under the Hood

These editors don't have their own brain — they connect to AI models like Claude, GPT, and Gemini. You can usually pick which model handles your request.

For building code, strong reasoning models (like Claude's Sonnet or Opus) tend to give cleaner results. You can switch models from a dropdown if one isn't doing the job.

Getting Started in 3 Steps

Ready to try one? Here's the fastest path:

  • Download Cursor or Windsurf and open it.
  • Open a folder (or create an empty one) as your project.
  • Press the chat shortcut and describe your first idea.

No setup rituals needed — you're talking to the AI within minutes.

"Create a single index.html page with a title 'Hello World', a short welcome paragraph, and a button that shows an alert when clicked."

Quick Check

What is the main advantage of an AI editor like Cursor over a plain chat window?

Recap: Your Home Base

AI editors are where vibe coding happens day to day. Key takeaways:

  • Cursor and Windsurf are VS Code-based editors with AI built in.
  • They can read your whole project and edit files in place.
  • Use @ to give the AI the right context.
  • Always review the diff before accepting changes.

Next up: agentic tools like Claude Code and Copilot that can run code for you.

よくある質問

「AIエディター：CursorとWindsurf」レッスンは無料ですか？

はい。「AIエディター：CursorとWindsurf」の完全なテキストはこのウェブで無料で読めます。インタラクティブに演習し（組み込みコードエディタと24時間対応のAIチューター）、Vibe Codingコースの残りをアンロックするには、CoddyKit PROにアップグレードしてください。 Vibe Codingコースには全4レッスンが含まれています。

「AIエディター：CursorとWindsurf」で何を学びますか？

プロジェクトを理解するAIネイティブなコードエディターを学びます。 ブラウザで直接実行するハンズオンコードでVibe Codingを演習し、24時間対応のAIチューターがレッスンを進める中での質問に答えます。

Vibe Codingを始めるのに経験は必要ですか？

事前経験は必要ありません。CoddyKitのVibe Codingは初級者から上級者向けに構成されているため、ここから始めるか最初から始めて、自分のペースで進むことができます。 これはレッスン1/4です。

「AIエディター：CursorとWindsurf」レッスンにはどのくらい時間がかかりますか？

ほとんどのCoddyKitレッスンは約5～10分かかります。各レッスンはコンパクトでインタラクティブなので、着実に進歩し、ウェブとアプリ全体で正確に前回の場所から再開できます。

このVibe Codingレッスンでコードを書いて実行できますか？

はい。すべてのVibe Codingレッスンに組み込みコードエディタが含まれているため、ブラウザでリアルコードを書いて実行し、即座のAIフィードバックを取得できます。ローカル設定は不要です。

このコースのすべてのレッスン

  1. AIエディター：CursorとWindsurf
  2. エージェント型ツール：Claude CodeとCopilot
  3. アプリビルダー：v0、Bolt、Lovable
  4. 適切なツールを選ぶ
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