A setup check for the Antigravity command-line tool, including its installation and sign-in state.

Use it to check the tool's version and login status, and, when it is missing, guide installation choices.

It helps determine whether the command-line tool is available and authenticated before it is used.

setup — Skill for Claude Code by KingGyuSuh

Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code

/plugin marketplace add KingGyuSuh/gemini-search-cc

Claude Code

/plugin install gemini

Made for: Claude Code.

Or install gemini, the plugin that ships this one along with the rest of its 9 skills, 3 hooks.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/kinggyusuh/gemini-search-cc/setup.svg)](https://agentmods.dev/skills/kinggyusuh/gemini-search-cc/setup)

Your own site

<a href="https://agentmods.dev/skills/kinggyusuh/gemini-search-cc/setup"><img src="https://agentmods.dev/badge/skills/kinggyusuh/gemini-search-cc/setup.svg" alt="Measured on agentmods" height="20"></a>

Per session 13 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 826 The whole file, excluding the scripts and references it only reads on demand.

Security scan C 2 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00013	$0.00826
Opus 5	$0.00006	$0.00413
Sonnet 5	$0.00003	$0.00165
Haiku 4.5	$0.00001	$0.00083

Measured 8d ago against content hash f419d3387bac, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade C, and why

setup scanned grade C with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

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

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

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

plugins/gemini/skills/setup/SKILL.md · 71 lines

How it starts

The opening of the file, as written. The whole thing — 71 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Check whether the Antigravity CLI (agy) is installed and properly configured.

Note: This plugin migrated from the Gemini CLI (sunset for individual users on 2026-06-18) to its successor, the Antigravity CLI (agy). The slash commands are unchanged (/gemini:*), but the underlying engine is now agy.

Steps

Run the health check in JSON mode:

node "${CLAUDE_PLUGIN_ROOT}/scripts/gemini-companion.mjs" setup --json

Parse the JSON output to determine status:
- installed: whether the agy binary exists on PATH
- version: the installed version string (agy --version)
- loggedIn: whether a minimal headless probe succeeds (verifies active auth, not just file existence)
If the Antigravity CLI is NOT installed:
- Use AskUserQuestion to ask how to install:
  Antigravity CLI (agy) is not installed. How would you like to install it?
  - Official installer (Recommended)
  - Homebrew (macOS)
  - Show manual instructions
- If Official installer: run
```
curl -fsSL https://antigravity.google/cli/install.sh | bash
```
  (On Windows PowerShell: irm https://antigravity.google/cli/install.ps1 | iex)
- If Homebrew: run brew install --cask antigravity-cli
- If manual: point the user to https://antigravity.google/docs/cli-using
- After install, re-run the health check to confirm.
If the Antigravity CLI is installed but NOT logged in:
- Instruct the user to run agy once in their terminal to complete the browser sign-in (Google OAuth). Credentials are stored in the system keyring.
- For headless / CI environments, they can instead set ANTIGRAVITY_API_KEY (or GEMINI_API_KEY) in their environment.
- Existing Gemini CLI configuration (skills, plugins, MCP servers) can be imported with agy plugin import gemini.
- Explain: authentication is required for Google Search grounding to work.
If everything is healthy, confirm all available skills:
- /gemini:search — Quick grounded Google Search
- /gemini:research — Deep multi-step research (10 min timeout)
- /gemini:audit — Security & dependency audit
- /gemini:fact-check — Verify technical claims
- /gemini:changelog — Latest release notes for a package
- /gemini:compare — Compare technologies with real-time data

Run the human-readable health check for display:

node "${CLAUDE_PLUGIN_ROOT}/scripts/gemini-companion.mjs" setup

Read the full file on GitHub · 71 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

8d ago First seen · 71 lines · 13 tokens per session scan C f419d3387bac

Subscribe to this mod's changes

setup is a skill published in the GitHub repository KingGyuSuh/gemini-search-cc (3 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 13 tokens to every session and 826 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Claude Code claude-code-plugin deep-research fact-checking gemini google-search

notebook-kb

Use the notebook knowledge base (the local SQLite RAG /agy:notebook builds from a folder of documents) to do precise, grounded, cited work — total amounts by category, find every doc that mentions a person/organization, build a timeline, export a table — instead of re-reading prose and burning Claude's context.…

MarcosNahuel/antigravity-plugin-cc · 108 tokens

agy-prompting

Internal helper — how to tighten a user request into a sharp prompt for the Antigravity CLI (agy / Gemini 3.x with native web search and agentic tools).

MarcosNahuel/antigravity-plugin-cc · 40 tokens

provider-integration

Adds new AI providers to claude-council, configures provider API settings, troubleshoots provider connections, and documents the provider script interface. Covers creating provider shell scripts, setting API keys, and validating connectivity. Triggers on "add provider", "new AI agent", "provider not working", "API…

hex/claude-council · 74 tokens

video-perception

Use when the user mentions a video file (.mp4, .mov, .avi, .mkv, .webm), a YouTube URL, asks to watch/analyze/review a video, or references video content in conversation.

jordanrendric/claude-video-vision · 51 tokens

librarium

Runs evidence-aware, multi-provider research with the Librarium v2 CLI. Use for deep research, competitive research, answer-engine visibility checks, or questions needing grounded multi-source coverage.

jkudish/librarium · 40 tokens

autosearch:channel-selection

Group-first channel selection algorithm for v2 tool-supplier architecture. Given a research query + clarify rubrics + channelpriority hints, picks 1-3 relevant groups from the router index, then 3-8 leaf channels from within those groups. Replaces flat-rank selection across 41 channels with a two-stage pick so runtime…

0xmariowu/Autosearch · 87 tokens

setup