Vibe coding tool

Antigravity

Google's agent CLI that replaced Gemini CLI — closed-source, invoked as agy.

Terminal CLI (invoked as agy)Closed-source (Google) · Google account / API keyBuilders already in Google's ecosystem who used Gemini CLI

Official site Publish a proof

What it is

Antigravity is Google's agentic coding CLI. On 2026-06-18 Google shut down the open-source Gemini CLI and replaced it with Antigravity, a closed-source tool you invoke as agy.

If you relied on Gemini CLI, this is the migration path Google points you to. It is capable and tied tightly into Google's models — but it is no longer open-source, so you cannot read or self-host it the way you could with Gemini CLI.

Be clear-eyed: a closed-source CLI from a vendor that just sunset its open predecessor is a tool you use, not one you own. Keep your work portable and do not build a workflow that only Antigravity can run.

Install & set up

1. Install

Run the official Antigravity CLI installer with curl. It installs the agy command.

curl -fsSL https://antigravity.google/cli/install.sh | bash

2. Sign in

Authenticate with your Google account (or an API key) on first run.

agy login

3. Start it

Open your project folder and launch the agent.

cd my-project && agy

4. Migrating from Gemini CLI

Gemini CLI was shut down on 2026-06-18. Antigravity reads your existing GEMINI.md / AGENTS.md context files, but re-check any scripts that called the old gemini command — they will not work and must be repointed at agy.

From install to your first verified proof

The tool drafts; you stay accountable. Here is the path from a fresh install to a proof you can defend.

1Pick one small real feature — state the user, the workflow, and the success condition before you ask for code.

2Let Antigravity draft the smallest useful version, then read every file it writes and ask why before you trust it.

3Run it locally, test on a phone, and fix one real bug yourself so you can explain it.

4Deploy it, then log it at /proof — live URL, repo, and your 60-second Explain.

The proof tie: Antigravity drafts; you stay accountable and portable. Review what it writes, keep your work tool-agnostic, deploy, and log the proof at /proof.

Strengths & gotchas

Strengths

Tightly integrated with Google's latest models
Familiar migration path if you came from Gemini CLI
Capable terminal agent that runs over SSH
Reads existing AGENTS.md context

Gotchas

Closed-source — you cannot read or self-host it (Gemini CLI, which it replaced, was open)
Google shut down Gemini CLI on 2026-06-18; old gemini scripts must be repointed at agy
Model usage is metered in USD — watch your spend
Vendor lock-in risk: keep your work portable

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