gemini-cli/packages/cli/README.md

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# Gemini CLI
This package contains the core command-line interface for Gemini CLI.
## Setup
1. **Get a Gemini API Key:** Obtain your API key from Google AI Studio: [https://aistudio.google.com/app/apikey](https://aistudio.google.com/app/apikey)
2. **Set Environment Variable:** Set the `GEMINI_API_KEY` environment variable to your obtained key. You can do this temporarily in your current shell session:
```bash
export GEMINI_API_KEY="YOUR_API_KEY"
```
Or add it to your shell's configuration file (like `~/.bashrc`, `~/.zshrc`, or `~/.profile`) for persistence:
```bash
echo 'export GEMINI_API_KEY="YOUR_API_KEY"' >> ~/.bashrc # Or your preferred shell config file
source ~/.bashrc # Reload the config
```
Replace `"YOUR_API_KEY"` with your actual key.
## Building
To build only the CLI package, navigate to this directory (`packages/cli`) and run:
```bash
npm run build
```
This command executes the TypeScript compiler (`tsc`) as defined in this package's `package.json`. Ensure dependencies have been installed from the root directory (`npm install`) first.
## Running
To start the Gemini CLI directly from this directory:
```bash
npm start
```
This command executes `node dist/gemini.js` as defined in this package's `package.json`.
## Debugging
To debug the CLI application using VS Code:
1. Start the CLI in debug mode from this directory (`packages/cli`):
```bash
npm run debug
```
This command runs `node --inspect-brk dist/gemini.js`, pausing execution until a debugger attaches.
2. In VS Code (opened at the root of the monorepo), use the "Attach" launch configuration (found in `.vscode/launch.json`). This configuration is set up to attach to the Node.js process listening on port 9229, which is the default port used by `--inspect-brk`.