Environment check (general steps)
Before manually configuring Claude Code, Codex, or OpenCode, verify that your terminal environment works. We recommend the AI Toolbox general steps. Manual configuration is intended for users familiar with terminals and configuration files.
1. Verify Node.js
Run these commands in a Windows, macOS, or Linux terminal:
node --version
npm --version
If both return version numbers, Node.js and npm are ready. If a command is not found, install the current Node.js LTS release and reopen your terminal.
2. Install a CLI
Claude Code and Codex can be installed globally with npm:
npm install -g @anthropic-ai/claude-code@latest
npm install -g @openai/codex@latest
OpenCode installation may vary by version. Follow its official installation instructions.
3. Test the installation
claude --version
codex --version
Once the command returns version information, continue to the corresponding manual configuration guide. The CLI creates its configuration directory in your user directory after the first launch.