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Gemini Cross-Model Second Opinion

Launches the Gemini CLI to review, stress-test, or advise on your Google Ads, SEO, or code changes.

Marketing & SEOIntermediate★ 3,337⑂ 414AI score 7/10Last updated: Aug 9, 2026

What it does

Hands your pending changes to Google Gemini for an independent, cross-model review. Three modes:

  • review — PASS/FAIL gate with blocking issues, warnings and strengths
  • challenge — adversarial devil's-advocate pass that names assumptions and tries to break them
  • consult — open Q&A on Google Ads strategy or SEO best practices

It auto-detects the change type (Google Ads, SEO metadata, code, or mixed) and tailors the reviewer prompt accordingly. If Claude already reviewed the same work, it produces a comparison split into overlapping findings, Claude-only, Gemini-only, and disagreements.

Who it's for

  • Performance marketers changing campaign structure, bids, or budgets
  • SEO practitioners rewriting titles, meta descriptions, or schema markup
  • Developers who want a second model to sanity-check a diff before shipping

Examples

  1. After a big keyword and negative-keyword edit, say "gemini review" → PASS/FAIL verdict with policy, broad-match and landing-page alignment checks
  2. After drafting metadata for a new landing page, say "gemini challenge" → assumptions challenged plus specific before/after metrics to validate
  3. "consult gemini: should we move this account to Performance Max?" → a blunt, auction-mechanics-based opinion to compare against Claude's

Prerequisite: @google/gemini-cli installed and authenticated with a Google account.

· · · Install guide · · ·

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 && 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 and sign in with your Google account to authenticate.
  3. Clone the skill repository: git clone https://github.com/nowork-studio/NotFair.git
  4. Copy the skill folder into place: mkdir -p ~/.claude/skills && cp -r NotFair/gemini ~/.claude/skills/gemini
  5. Restart Claude Code, then try a trigger phrase such as "gemini review" or "ask gemini ...".
  6. If you see "Gemini CLI is not installed", revisit steps 1 and 2.
View source on GitHub ↗License: MIT