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Gemini — Cross-Model Second Opinion

Launches Google's Gemini CLI to review, stress-test, or consult on your Google Ads, SEO, and code changes.

Marketing & SEOIntermediate★ 3,853⑂ 495AI score 9/10Last updated: Sep 22, 2026

What it does

  • Sends your pending changes to the Google Gemini CLI so a different model gives an independent second opinion.
  • Three modes:
    • review — structured PASS/FAIL gate with blocking issues, warnings, and strengths
    • challenge — adversarial stress test that attacks your assumptions and names the metrics to verify
    • consult — open Q&A on Ads strategy, SEO best practices, or implementation questions
  • Auto-detects the change type: Google Ads (campaigns, keywords, bids, budgets), SEO metadata (titles, meta descriptions, schema, robots, sitemaps), code (git diff), or mixed.
  • If Claude already reviewed the same work, it builds a cross-model comparison: overlapping findings (highest confidence), Claude-only, Gemini-only, and disagreements.

Who it's for

  • Marketers editing Google Ads or SEO metadata who want a sanity check before pushing changes live
  • Developers who want a second reviewer from a different model on a diff
  • Anyone willing to install and authenticate the Gemini CLI

Examples

  1. "gemini review" — grade a new Search campaign structure and negative keyword list for policy compliance, cannibalization, and budget efficiency.
  2. "gemini challenge" — pressure-test a bulk title-tag rewrite and get specific before/after metrics to watch (e.g., impression share lost to rank at 14 days).
  3. "consult gemini: should we move this account to Performance Max?" — ask a strategy question with no pending diff at all.

· · · Install guide · · ·

Try it now, no install

Paste this into Claude to use the skill without installing anything.

Read the instructions in this file and follow them to help me:
https://raw.githubusercontent.com/nowork-studio/NotFair/HEAD/gemini/SKILL.md

What I want: (describe your task here)

If Claude can't open the link, open it yourself and paste the contents instead.

↓ If it works for you, download the ZIP below and install it. Then it runs on its own — no pasting each time.

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

Let Claude do it — paste this into Claude Code

Install the skill I found on Claude Skill Mart.
Copy the gemini folder from the GitHub repo nowork-studio/NotFair into my ~/.claude/skills/gemini/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/nowork-studio/NotFair.git && mkdir -p ~/.claude/skills/gemini && cp -r NotFair/gemini/* ~/.claude/skills/gemini/

⚠ This is a third-party skill. Check the source repository before installing.

  1. Install the Gemini CLI: npm install -g @google/gemini-cli
  2. Run gemini once in your terminal and sign in with your Google account.
  3. Clone the repo: git clone https://github.com/nowork-studio/NotFair.git
  4. Copy the skill into place: mkdir -p ~/.claude/skills/gemini && cp -r NotFair/gemini/* ~/.claude/skills/gemini/
  5. Restart Claude Code, then say "gemini review" or "ask gemini" to trigger it.
  6. If it errors out, verify installation with command -v gemini and re-run gemini to confirm authentication.
View source on GitHub ↗License: MIT