gemini-cli: a terminal-based AI agent with built-in shell tools and MCP support for developer workflows

What it solves

Gemini CLI provides developers with a direct, terminal-based interface to Gemini models. It eliminates the need to switch between a browser and the command line, allowing users to query and edit codebases, automate operational tasks, and integrate AI assistance directly into their development workflow.

How it works

It acts as an AI agent that runs in the terminal, supporting multiple authentication methods (Google OAuth, API keys, or Vertex AI). The tool allows users to interact with Gemini 3 models, leveraging a 1M token context window for large codebase analysis. It can be used interactively or in a non-interactive "headless" mode for scripting.

Who it’s for

Developers who primarily work in the command line and want to integrate AI-powered code understanding, generation, and automation into their local environment or CI/CD pipelines (via GitHub Actions).

Highlights

• Built-in Tools: Includes native support for Google Search grounding, shell commands, file system operations, and web fetching.
• Extensibility: Supports the Model Context Protocol (MCP) for adding custom integrations and tools.
• GitHub Integration: Offers a dedicated GitHub Action for automated PR reviews, issue triage, and on-demand assistance.
• Context Management: Features conversation checkpointing and custom GEMINI.md context files to tailor AI behavior per project.
• Multimodal Capabilities: Can generate applications from PDFs, images, or sketches.