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Gemini Cross-Model Second Opinion

Launches the Google Gemini CLI as an independent reviewer for code, Google Ads, and SEO changes in review, challenge, or consult mode.

Marketing & SEOIntermediate★ 3,866⑂ 495AI score 9/10Last updated: Sep 25, 2026

What it does

  • Probes for the Gemini CLI first and gives install/auth instructions if it's missing.
  • Auto-detects the mode from your phrasing: review (PASS/FAIL gate), challenge (adversarial stress test), consult (open Q&A).
  • Classifies the change type — code (via git diff), Google Ads (campaigns, keywords, bids, budgets), SEO metadata (titles, descriptions, schema, robots, sitemaps), or mixed.
  • Builds a structured BEFORE/AFTER context block with business goals, target keywords, and search intent, then pipes it into a purpose-built Gemini prompt.
  • If Claude already reviewed the same changes, it produces a Claude-vs-Gemini comparison: overlapping findings, model-unique findings, and explicit disagreements, plus suggested next steps.

Who it's for

  • Developers who want a second model's eyes on a diff before shipping.
  • Performance marketers validating Ads policy risk, budget allocation, and negative-keyword gaps before pushing changes live.
  • SEO practitioners checking title/meta lengths, schema validity, and cannibalization risk.

Examples

  1. "gemini review" — Gemini reads the current diff and returns PASS/FAIL with blocking issues and fixes.
  2. "gemini challenge" — Gemini attacks the assumptions behind a Performance Max budget increase and names the exact metrics to compare before and 14 days after.
  3. "ask gemini" — With no pending changes, you get an opinionated answer on, say, broad vs. phrase match for a keyword set.

· · · 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-plugin/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-plugin into my ~/.claude/skills/nowork-studio-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-plugin.git && mkdir -p ~/.claude/skills && cp -r notfair-plugin/gemini ~/.claude/skills/gemini

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

  1. Confirm Node.js is available: node -v.
  2. Install the Gemini CLI: npm install -g @google/gemini-cli
  3. Run gemini once and complete the Google account sign-in so the CLI is authenticated.
  4. Clone the repo: git clone https://github.com/nowork-studio/notfair-plugin.git
  5. Copy the skill folder: mkdir -p ~/.claude/skills && cp -r notfair-plugin/gemini ~/.claude/skills/gemini
  6. Restart Claude Code, then say "gemini review", "gemini challenge", or "consult gemini".
  7. For code reviews, run it inside a git repository so the diff can be captured.
View source on GitHub ↗License: MIT