setup

A setup command for checking whether Google Antigravity’s command-line tool, `agy`, is installed and ready to use.

In plain words
What is it for?
Check `agy`, show installation instructions when it is missing, and explain how to authenticate or configure a Gemini API key.
Why use it?
It identifies missing installation or sign-in steps without installing software or changing credentials automatically.

Command

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/lovelaceloom/gemini-plugin-cc/setup
Clone the repo
git clone --depth 1 https://github.com/LovelaceLoom/gemini-plugin-cc
Per session 21 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 473 The whole file, excluding the scripts and references it only reads on demand.
Security scan D 3 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00021 $0.00473
Opus 5 $0.00010 $0.00236
Sonnet 5 $0.00004 $0.00095
Haiku 4.5 $0.00002 $0.00047

Measured 2d ago against content hash d16430457a95, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade D, and why

setup scanned grade D with 3 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 2d 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

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

2. Set `GEMINI_API_KEY` (free key from https://aistudio.google.com/app/apikey) — either inline (`export GEMINI_API_KEY=...`) or in `~/.claude/settings.json` under `env`. agy honors this as a fallback for enterprise setup

Makes network callslowCapability

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

- The plugin does NOT auto-install agy. Google's installer is a curl-piped shell script from `antigravity.google/cli/` and downloads a Go binary; that is a deliberate user action, not something the plugin should ever run
plugins/gemini/commands/setup.md · 41 lines

What it actually says

Run:

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

If the result says agy is unavailable:

  • Use AskUserQuestion exactly once to ask whether the user wants the install instructions surfaced now.
  • The plugin does NOT auto-install agy. Google's installer is a curl-piped shell script from antigravity.google/cli/ and downloads a Go binary; that is a deliberate user action, not something the plugin should ever run on the user's behalf.
  • Use these two options:
    • Show install instructions (Recommended)
    • Skip for now
  • If the user chooses install, surface the exact one-liner verbatim (do NOT execute it):
# macOS / Linux
curl -fsSL https://antigravity.google/cli/install.sh | bash

# Windows (PowerShell)
irm https://antigravity.google/cli/install.ps1 | iex
  • Tell the user to re-run /gemini:setup after the install finishes.

If agy is installed but not authenticated, the JSON nextSteps will spell out the options. Present them verbatim. The two valid options are:

  1. Run !agy once and complete the Google sign-in flow in the browser (agy stores credentials in the system keyring).
  2. Set GEMINI_API_KEY (free key from https://aistudio.google.com/app/apikey) — either inline (export GEMINI_API_KEY=...) or in ~/.claude/settings.json under env. agy honors this as a fallback for enterprise setups.

Output rules:

  • Present the parsed setup output as a short status block to the user.
  • If actionsTaken is non-empty (review gate was toggled), surface that.
  • If nextSteps is non-empty, surface it.
  • If ready: true and no actions/steps, just confirm success.
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.

  1. 2d ago First seen · 41 lines · 21 tokens per session scan D d16430457a95

Subscribe to this mod's changes

setup is a command published in the GitHub repository LovelaceLoom/gemini-plugin-cc (4 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 21 tokens to every session and 473 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it D with 3 findings (downloads and executes remote code, reads agent configuration directories, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.