Environment Setup (Common Steps)
This guide explains how to install and configure the environment required for Claude Code, Codex, and Gemini CLI.
1. Verify Node.js Installation
Enter the following command in your Windows or macOS terminal:
npm list -g --depth=0You should see output similar to the image below (empty output is also fine):
Command Not Found?
If you see "command not found", it means Node.js is not installed. Please follow the Node.js Installation Guide to install it.
After installation, run the command again. If you no longer see "command not found", the installation was successful.
2. Install CLI Tools
Enter the following commands in your terminal to install all CLI tools at once:
npm i -g @anthropic-ai/claude-code@latest
npm i -g @openai/codex@latest
npm i -g @google/gemini-cli@latest
TIP
You can also install only the specific CLI tools you need.
3. Test Installation
Important
This step is crucial! Running these commands will create the configuration directories for each CLI in your user directory, which are needed for subsequent configuration.
Enter the following commands in your terminal to test each tool:
claudecodexgeminiIf you see the corresponding interface or options menu, the installation was successful:
Next Steps
After installation, please refer to the configuration guide for your specific tool: