What is stevenc81-gemini?

A Claude Code plugin that uses the Antigravity command-line tool to fact-check information with live web sources. The listing describes it as a Gemini plugin.

It is for fact-checking answers and grounding them in information retrieved from the web.

It helps check claims against current online information instead of relying only on the model's existing knowledge.

stevenc81-gemini — Plugin by stevenc81

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.

Claude Code

/plugin marketplace add stevenc81/gemini-plugin-cc

agentmods

npx agentmods add plugins/stevenc81/gemini-plugin-cc/marketplace

Clone the repo

git clone --depth 1 https://github.com/stevenc81/gemini-plugin-cc

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

stevenc81-gemini scanned grade A with 0 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude-plugin/marketplace.json · 22 lines

What it actually says

{
  "name": "stevenc81-gemini",
  "owner": {
    "name": "stevenc81"
  },
  "metadata": {
    "description": "Gemini plugin for Claude Code: grounded fact-checking via Antigravity CLI.",
    "version": "0.1.0"
  },
  "plugins": [
    {
      "name": "gemini",
      "description": "Use Antigravity CLI from Claude Code to fact-check with live web grounding.",
      "version": "0.1.0",
      "author": {
        "name": "stevenc81"
      },
      "source": "./plugins/gemini"
    }
  ]
}

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.

2d ago First seen · 22 lines scan A 12e49e6a45ea

Subscribe to this mod's changes

stevenc81-gemini is a plugin published in the GitHub repository stevenc81/gemini-plugin-cc (1 stars, last pushed 2mo ago), licensed Apache-2.0. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

antigravity claude-code claude-code-plugin fact-checking gemini

stevenc81-gemini

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

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