# How to Set Up Claude Code in Antigravity for Beginners > To set up Claude Code in Antigravity, install Antigravity, sign up to a paid Claude plan, install Claude Code, then add the Claude Code extension from the extensions panel and open a project folder. You chat with Claude on the right, it writes the files in the folder on the left, and you never touch the code yourself. Source: https://fluxomate.com/blog/how-to-set-up-claude-code-in-antigravity.html Published by Fluxomate (https://fluxomate.com/), 2026-04-24. Section: Claude Code builds. Video: https://www.youtube.com/watch?v=wJ5iH8CocDY ## Key takeaways - Antigravity is a coding environment from Google. It defaults to Gemini, but the Claude Code extension lets you use Claude inside it. - Claude Code needs a paid Claude plan. The free plan will not do. - Everything lives in folders. One project folder holds everything Claude builds. - Start every new build in plan mode, and read the plan before you accept it. - Watch the context percentage, and be careful with security even on internal tools. ## What is Antigravity, and why use it with Claude Code? Antigravity is a coding environment, sometimes called an IDE. It is where you open folders, see the files an AI creates and chat with the AI side by side. Do not let the name put you off. Using it for this kind of build is simple, and with AI doing the work you do not need to know how to code. It is a Google product, so out of the box it expects you to use Gemini. You can use that, but at the time of recording Claude Code gave better results for building tools, which is why the extension is the first thing to add. That may change, so check which model works best when you read this. The reason to learn this at all is practical. The goal is not to replace people on your team. It is to get more output from the same input, so you can take on more clients without hiring more, by building internal tools your team can use. ## How do you install Antigravity and Claude Code? There are three installs, and they are all quick. 1. Download Antigravity for Windows or Mac and install it. 2. Create a Claude account and move to a paid plan. Claude Code is not available on the free plan. 3. In Claude, click the Code button on the left. It shows a command to copy. Open your terminal (on Windows, search for terminal), paste the command and press enter. Claude Code installs automatically. ## How do you add the Claude Code extension in Antigravity? Open Antigravity and go to the extensions panel on the left. Search for Claude Code and install it. A small Claude icon then appears. Click it and Claude Code opens as a chat panel inside Antigravity. If you prefer, you can also use it in the terminal. Open the terminal in Antigravity, type claude and it launches there. The first time, it asks whether you trust the folder, and you answer yes for your own project. The chat panel is more friendly for beginners, so that is what we use. ## How should you organise your folders? Everything in Antigravity lives in folders. Keep a master folder for all your projects, and make a new folder for each tool. In the example we made a folder for the channel and, inside it, a folder for the media buyer. To open it, use File, then Open folder, and pick the one you want. You then get a clean slate. Your project folder is on the left. As Claude builds, new folders and files appear there, and that folder is the thing you would deploy later. The chat is on the right, and it is the only place you type. You are not editing code. You describe what you want and the AI writes it. ## How do you write the first prompt and use plan mode? Explain what you want in plain language. We used a voice dictation tool, so there was no typing. The prompt said what the agent should be called, what it should be able to do and that it should run in the terminal with no interface. It also asked Claude to explain its plan before building anything. The prompt itself is not special, and better ones are possible. Claude has three modes: plan mode, ask before edits, and edit automatically. For a first prompt choose plan mode, which only plans. Claude then checks the folder, may run web searches and asks permission for some queries. In the video it was fine to allow them. When the plan arrives, read it for sense, not detail. The one in the video covered the architecture, the file structure, the tools Claude would create, the key files, the credentials needed, safe defaults and an implementation order. If it looks right, accept it and switch to auto accept so it starts building. You can watch the files appear on the left. ## What else can you do inside Claude Code? You can run two sessions at once. If you start the same prompt again, you get a second plan, and you can try different approaches in parallel. More sessions use more credits. Typing a slash opens a menu. From there you can switch the model, connect other things, or turn on fast mode. Fast mode is quick, but it uses a lot of credits, so we do not recommend it. A context figure appears in the interface as a percentage. It shows how much of the available context the conversation has used. When it fills, Claude compacts everything into a small markdown summary and carries on. That happens automatically, but the more context there is, the worse the performance gets. Keep an eye on it, and open a new session or folder for separate work. ## What should you watch out for? Be aware of security. A tool built this way does not come with strong security by default. For an internal tool that runs only in your terminal, the risk is lower, but you still need to know what is happening. At least check the code base, or ask a separate agent to check it. When you give AI tools input fields, you can be exposed to attacks. Also treat the result as a proof of concept. The video build was deliberately basic, and it is a starting point to improve, not something to copy and run unchanged. Building it yourself teaches you more than downloading it. ## Questions people ask ### Do I need coding experience to use Claude Code in Antigravity? No. You describe what you want in chat, and the AI creates the files and writes the code. You do not edit any code yourself. You still need to follow Claude's instructions, such as creating keys and accounts, and to test what it builds. ### Can I use Claude Code without a paid plan? No. Claude Code needs a paid Claude plan, so you sign up before installing it. ### Should I use the terminal or the chat panel? Both work. You can type claude in the terminal, or open the chat panel from the extension. We prefer the chat panel because the interface is easier for beginners. ### Why start in plan mode? Plan mode makes Claude plan before it changes anything. You can check that it understood your idea, then accept the plan and let it build. It saves rework later. Tools used: Antigravity, Claude Code, Claude, Terminal Free templates for this guide: https://fluxomate.com/resources.html?r=build-a-media-buyer