- Claude Code
- Anthropic's command-line coding tool that can read, write, and edit files on your computer and take actions on your behalf, rather than just chatting like a typical AI assistant.
- IDE (Integrated Development Environment)
- A desktop application where code lives and gets edited, with a file explorer, editor, and terminal in one window. Examples include VS Code, Cursor, and Google's Antigravity.
- VS Code
- Microsoft's free code editor, the most widely used IDE. Claude Code can run as an extension inside it.
- Antigravity
- Google's free IDE, a coding workspace similar to VS Code where Claude Code can be installed as an extension.
- Cursor
- A paid IDE built specifically around AI-assisted coding, competing with VS Code and Antigravity.
- File system
- The folders and files that make up a project on your computer. In an IDE, the file system is shown in a sidebar so you can navigate and organize your work.
- Workspace
- A container inside an IDE that can hold multiple projects at once, letting you switch between them without opening separate windows.
- Prompt
- Any message you send to an AI tool. The clearer and more specific the prompt, including any role you assign the AI, the better the result tends to be.
- Context
- The background information you give an AI about you, your business, and what you want, so its answers feel tailored rather than generic.
- .md file
- A plain-text Markdown file, commonly used to store instructions, notes, or configuration that both humans and AI tools can read.
- @ reference
- A shortcut inside Claude Code where typing the @ symbol lets you point Claude at a specific file by name, so it reads exactly the file you mean.
- Permission modes
- Settings in Claude Code that control how much Claude can do on its own. Modes range from asking before every edit, to accepting edits automatically, to fully bypassing prompts.
- Plan mode
- A Claude Code mode where the AI drafts a step-by-step plan first and waits for your approval before making any changes.
- Tools (in AI agents)
- The built-in capabilities an AI agent can use to act on the world, such as reading files, editing files, searching the web, or running commands.
- Bash command
- A text command run in a terminal to do things like create files, run programs, or move data. Claude Code can run these on your behalf.
- Context window
- The amount of text an AI can keep in active memory during one conversation. Once it fills up, older messages get dropped or summarized and quality drops.
- CLAUDE.md
- A special instruction file Claude Code reads automatically at the start of a project. You use it to teach Claude how to behave, what rules to follow, and what to avoid.
- Model (AI model)
- A specific version of the underlying AI brain. Claude offers Haiku (fast and cheap), Sonnet (balanced), and Opus (most powerful but most expensive).
- Token
- The smallest unit AI models read and bill against, roughly three-quarters of a word. Every message in and out counts toward your usage limits.
- Input vs output tokens
- Input tokens are everything the AI has to read, including the whole running conversation. Output tokens are the words it writes back. Long chats balloon input tokens fast.