A fact-checking command that sends conversation content to the Antigravity CLI for web-grounded review. It returns supported, uncertain, or contradicted claims with source links.

Use it to check a previous reply, a specific passage, or other conversation claims against live web sources.

It helps identify unsupported or incorrect statements without changing the content being reviewed.

review — Command for coding agents by stevenc81: A fact-checking command that sends conversation content to the…

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/stevenc81/gemini-plugin-cc/review

Clone the repo

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

Or install gemini, the plugin that ships this one along with the rest of its 2 commands.

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/commands/stevenc81/gemini-plugin-cc/review.svg)](https://agentmods.dev/commands/stevenc81/gemini-plugin-cc/review)

Your own site

<a href="https://agentmods.dev/commands/stevenc81/gemini-plugin-cc/review"><img src="https://agentmods.dev/badge/commands/stevenc81/gemini-plugin-cc/review.svg" alt="Measured on agentmods" height="20"></a>

Per session 13 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 747 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 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.

Model	Per session	Once invoked
Fable 5	$0.00013	$0.00747
Opus 5	$0.00006	$0.00374
Sonnet 5	$0.00003	$0.00149
Haiku 4.5	$0.00001	$0.00075

Measured 3d ago against content hash e6707f976d43, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

review 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 3d 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.

plugins/gemini/commands/review.md · 59 lines

What it actually says

Run a grounded fact-check of content from the current conversation via agy --print (Antigravity CLI). The agent autonomously runs live web searches and returns structured findings: which claims are supported, uncertain, or contradicted, with source URLs, plus any reasoning issues.

Raw slash-command arguments: $ARGUMENTS

Core constraint:

This command is analysis-only.
Do not fix issues, edit files, or change your answer.
Your only job is to run the review and return Gemini's output verbatim to the user.

Input handling:

Determine what to review from the user's message and conversation context:
- If the user points at specific content (e.g., "review your last reply", "check the second bullet above", "review the paragraph starting with...", "review what I just pasted"), pass exactly that content.
- Otherwise, default to the full text of your immediately previous assistant turn.
Pass the selected content verbatim via stdin using a quoted heredoc. Do not paraphrase or abridge it.
If there is nothing suitable to review (e.g., the user gave no reference and this is the first message of the session), stop and tell the user: "Nothing to review. Point me at the text you want audited (e.g., 'review your last reply' or paste the content), then rerun /gemini:review."

Execution mode rules:

If the raw arguments include --wait, do not ask. Run the review in the foreground.
If the raw arguments include --background, do not ask. Run the review in a Claude background task.
Otherwise, count the characters in the selected content:
- If the selected content is roughly >5000 characters, recommend Run in background.
- Otherwise recommend Wait for results.
- Use AskUserQuestion exactly once with two options, recommended option first and suffixed with (Recommended):
  - Wait for results
  - Run in background
- If the user cancels or dismisses the question, abort and tell them: "Cancelled. No review was run."

Foreground flow:

Invoke with a quoted heredoc so the selected content is piped in literally (no shell expansion inside the content):

node "${CLAUDE_PLUGIN_ROOT}/scripts/gemini-companion.mjs" review "$ARGUMENTS" <<'GEMINI_REVIEW_INPUT_EOF'
<the full text of the content to review, verbatim>
GEMINI_REVIEW_INPUT_EOF

Return the command's stdout verbatim, exactly as-is.
Do not paraphrase, summarize, or add commentary before or after it.
Do not edit any file or follow up on any finding.

Background flow:

Launch the review with Bash in the background using the same heredoc form:

Bash({
  command: `node "${CLAUDE_PLUGIN_ROOT}/scripts/gemini-companion.mjs" review "$ARGUMENTS" <<'GEMINI_REVIEW_INPUT_EOF'
<the full text of the content to review, verbatim>
GEMINI_REVIEW_INPUT_EOF`,
  description: "Gemini review",
  run_in_background: true
})

After launching, tell the user: "Gemini review started in the background. You will be notified when it finishes."

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.

3d ago First seen · 59 lines · 13 tokens per session scan A e6707f976d43

Subscribe to this mod's changes

review is a command published in the GitHub repository stevenc81/gemini-plugin-cc (1 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 13 tokens to every session and 747 once invoked, about $0.0001 per session on Opus 5. 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.

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