gemini

gemini is a skill for Claude Code, Codex from nowork-studio/notfair-plugin. It costs 184 tokens per session (2,529 once invoked), scanned A, original, MIT.

A second-opinion workflow that asks Google's Gemini command-line tool to review code, Google Ads changes, or search-engine optimisation changes. It can review, challenge, or discuss the proposed work.

In plain words
What is it for?
Review code diffs and refactors, test Google Ads campaigns and budgets, or check SEO titles, descriptions, schema, robots rules, sitemaps, and rewritten content.
Why use it?
A different AI may catch problems the first review missed, especially in Google products where Gemini has relevant platform context. The challenge mode deliberately tests whether a change can fail.

Skill for Claude CodeCodex

Part of the notfair plugin — 52 skills, 1 MCP server shipped together

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 skills/nowork-studio/notfair-plugin/gemini
Any agent
npx skills add nowork-studio/notfair-plugin --skill gemini
Clone the repo
git clone --depth 1 https://github.com/nowork-studio/notfair-plugin

Made for: Claude Code, Codex.

Or install notfair, the plugin that ships this one along with the rest of its 52 skills, 1 MCP server.

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.

agentmods badge for gemini

README.md
[![agentmods](https://agentmods.dev/badge/skills/nowork-studio/notfair-plugin/gemini.svg)](https://agentmods.dev/skills/nowork-studio/notfair-plugin/gemini)
Your own site
<a href="https://agentmods.dev/skills/nowork-studio/notfair-plugin/gemini"><img src="https://agentmods.dev/badge/skills/nowork-studio/notfair-plugin/gemini.svg" alt="Measured on agentmods" height="20"></a>
Per session 184 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,529 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.

ModelPer sessionOnce invoked
Fable 5 $0.00184 $0.02529
Opus 5 $0.00092 $0.01264
Sonnet 5 $0.00037 $0.00506
Haiku 4.5 $0.00018 $0.00253

Measured 4d ago against content hash 8e9ffe960913, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

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 4d 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.

gemini/SKILL.md · 311 lines

How it starts

The opening of the file, as written. The whole thing — 311 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Gemini — Cross-Model Second Opinion

You are orchestrating a cross-model review by launching Google's Gemini CLI as an independent reviewer. Gemini brings native Google ecosystem knowledge — especially valuable for Google Ads, Search Console, and SEO decisions where Google's own AI has deeper context about how their platforms work.

Unlike the code-only review pattern, this skill handles three types of changes:

  1. Code changes — diffs, new files, refactors
  2. Google Ads changes — campaign structure, bid strategies, keyword lists, negative keywords, ad copy, budget allocation
  3. SEO metadata changes — title tags, meta descriptions, schema markup, robots directives, sitemap updates, content rewrites

Step 0 — Detect Gemini CLI

command -v gemini >/dev/null 2>&1 && echo "GEMINI_FOUND" || echo "GEMINI_NOT_FOUND"

If GEMINI_NOT_FOUND: Stop and tell the user:

Gemini CLI is not installed. Install it with:

npm install -g @google/gemini-cli

Then run gemini once to authenticate with your Google account, and retry.

If GEMINI_FOUND: continue silently.


Step 1 — Detect Mode

Parse the user's request to determine the mode. Match against these patterns:

Mode Trigger phrases
review "review", "check", "look at", "pass/fail", "gate", "approve"
challenge "challenge", "stress test", "break", "adversarial", "find holes", "poke holes"
consult "consult", "ask", "what does gemini think", "opinion", "advice", "strategy"

If ambiguous: default to review for changes that exist in the diff, or consult if the user is asking a question with no pending changes.


Step 2 — Detect Change Type

Determine what kind of changes are being reviewed. Check in this order:

2a — Check for Google Ads changes

Look for signs of Ads-related work in the current conversation context:

  • Recent MCP tool calls to universal mcp__NotFair__google_ads_* tools or a supported dedicated Google Ads namespace
  • Discussion of campaigns, keywords, bids, budgets, ad copy, negative keywords
  • Files like .notfair/change-log.json or Ads-related config changes

Read the full file on GitHub · 311 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 4d ago First seen · 311 lines · 184 tokens per session scan A 8e9ffe960913

Subscribe to this mod's changes

gemini is a skill published in the GitHub repository nowork-studio/notfair-plugin (3,447 stars, last pushed 6d ago), licensed MIT. It adds 184 tokens to every session and 2,529 once invoked, about $0.0009 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 2026-08-30.

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