Antigravity CLI Commands: The Ultimate List

"Free? That can't be as good as Claude Code..." That was my first thought when I heard about the Gemini CLI back in 2025. Google had just released their AI terminal as open source.

That story has since come to an end. Google shut down the Gemini CLI on June 18, 2026 and replaced it with the Antigravity CLI: a new terminal tool with the command agy that belongs to the Antigravity platform. New commands, new models, new limits. And yes: a few bitter pills to swallow, too.

In this article, I'll show you all Antigravity CLI commands, from installation to slash commands to MCP integration. Plus a close look at what changed compared to the Gemini CLI and when switching makes sense.

From Gemini CLI to Antigravity CLI: What Happened?

The switch happened fast, but Google did announce it beforehand.

At I/O 2026, Google introduced Antigravity 2.0 and announced that the entire terminal experience would move there. One month later, on June 18, 2026, it was over: the Gemini CLI and the Gemini Code Assist extensions stopped serving consumer requests.

The problem is: this wasn't just a rename. The Gemini CLI was an open-source project with over 105,000 GitHub stars. The Antigravity CLI is a closed-source Go binary. And the generous free tier of 1,000 requests per day shrank to about 20 agent requests per day. The community was understandably angry, and I get it.

The good news:

Technically, the Antigravity CLI is a real step forward. Subagents that work in parallel, background tasks, hooks, a planning mode, and free model choice including Claude models. Yes, you read that right: you can work with Claude Opus inside Google's own terminal tool.

Installing the Antigravity CLI

Installation no longer runs through npm but through an install script from Google:

# macOS and Linux
curl -fsSL https://antigravity.google/cli/install.sh | bash

# Windows (PowerShell)
irm https://antigravity.google/cli/install.ps1 | iex

# Afterwards: verify the installation
agy --version

Authentication

The first time you run agy, your browser opens for login. You have two options: a regular Google account (OAuth) or a Google Cloud project for enterprise setups.

Basic Commands: The Daily Workflow

Getting started is simple: type agy and go. For scripts and quick questions, there's the non-interactive mode:

# Interactive mode in the current directory
agy

# Quick question without a session
agy -p "Explain the architecture of this codebase"

# Start with a specific model
agy --model "Gemini 3.1 Pro (High)"

# Auto-approve all tool calls (careful!)
agy --dangerously-skip-permissions

By default, the CLI asks before every action. You can fine-tune this in the settings with four permission modes: request-review (default), proceed-in-sandbox, always-proceed, and strict.

All Slash Commands in Detail

Here's the complete list of slash commands I was able to verify. The most exciting ones first: /plan, /goal, and /grill-me didn't exist in the Gemini CLI.

Shell Mode and Background Tasks

With the exclamation mark, you switch into shell mode and run regular terminal commands without leaving the session:

# Toggle shell mode (and back with !)
! git status

# Send a running task to the background: Ctrl+b
# Then monitor its progress:
/tasks

# Display active agents:
/agents

The combination of Ctrl+b and /tasks is one of the biggest improvements over the Gemini CLI: you can let a long task keep running and kick off the next one in parallel.

CLI Flags

The Antigravity CLI is more spartan with flags than its predecessor. These are the most important documented options:

Model Selection: Gemini, Claude, and GPT-OSS

With /model, you pick the model for your task. And this is where it gets interesting, because Google doesn't limit you to its own models:

MCP Integration

Model Context Protocol (MCP) works in the Antigravity CLI too, but the configuration has moved compared to the Gemini CLI. There are two levels: global for all projects and local per workspace:

// Global: ~/.gemini/antigravity-cli/mcp_config.json
// Per project: .agents/mcp_config.json
{
  "mcpServers": {
    "myServer": {
      "serverURL": "https://my-mcp-server.example.com"
    }
  }
}

Then use /mcp to check whether your servers are connected. The output shows you which tools they provide.

Subagents, Skills, and Hooks

Under the hood, the Antigravity CLI is a multi-agent system. Three building blocks are worth knowing:

Subagents work asynchronously and in parallel without blocking your main session. Keep track of them with /agents. Skills are markdown-based blueprints for teaching the CLI recurring workflows, a concept similar to Claude Code. And hooks are interceptors that run automatically before or after certain actions; use /hooks to see which ones are active.

Limits and Pricing

Now for the unpleasant part. The Antigravity CLI is officially free during the public preview, but the quotas are rough:

The free tier only includes about 20 agent requests per day, with quotas refreshing every five hours. That's a steep drop from the Gemini CLI's 1,000 requests per day. Paid tiers raise the ceiling: Google AI Pro starts at $20 a month, and the top AI Ultra Max plan costs $200 a month for a much larger quota. Once your quota runs out, you can also buy credits directly.