Agent-Skills.md

Agent Skills: Gemini CLI

Run Gemini CLI for AI queries. Use when user asks to "run/ask/use gemini", compare Claude vs Gemini, or delegate tasks to Gemini.

UncategorizedID: georgekhananaev/claude-skills-vault/gemini-cli

Repository

georgekhananaev/claude-skills-vault
georgekhananaevLicense: MIT
205

Install this agent skill to your local

pnpm dlx add-skill https://github.com/georgekhananaev/claude-skills-vault/tree/HEAD/.claude/skills/gemini-cli

Skill Files

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.claude/skills/gemini-cli/SKILL.md

Skill Metadata

Name
gemini-cli
Description
Run Gemini CLI for AI queries. Use when user asks to "run/ask/use gemini", compare Claude vs Gemini, or delegate tasks to Gemini.

Gemini CLI

Interact w/ Google's Gemini CLI locally. Run queries, get responses, compare outputs.

Prerequisites

Gemini CLI must be installed & configured:

  1. Install: https://github.com/google-gemini/gemini-cli
  2. Auth: Run gemini & sign in w/ Google account
  3. Verify: gemini --version

When to Use

  • User asks to "run/ask/use gemini"
  • Compare Claude vs Gemini responses
  • Get second AI opinion
  • Delegate task to Gemini

Usage

IMPORTANT: Use -p flag for non-interactive (headless) one-shot queries. Without -p, gemini opens interactive mode which hangs in automation.

# One-shot query (MUST use -p for non-interactive)
gemini -p "Your prompt"

# Specific model
gemini -p "prompt" -m gemini-3-pro

# JSON output
gemini -p "prompt" -o json

# Auto-approve tool use (-y is deprecated)
gemini --approval-mode=yolo -p "prompt"

# File analysis
cat file.txt | gemini -p "Analyze this"

Models

| Alias | Use case | |-------|----------| | auto | DEFAULT — routes per prompt (simple → Flash, complex → 3 Pro) | | pro | Force Gemini 3 Pro (best all-round) | | flash / flash-lite | Fast, lightweight tasks (3.5 Flash GA rolling out as auto default) |

Omit -m to use auto routing. Aliases beat pinned model ids — they track upstream model swaps. Pin a full id (e.g. gemini-3-pro) only when the user names one.

CLI Options

| Flag | Desc | |------|------| | -p | Required for headless. Non-interactive prompt | | -m | Model selection | | -o | Output: text/json/stream-json | | --approval-mode=yolo | Auto-approve all actions (-y is deprecated) | | -d | Debug mode | | -s | Sandbox mode | | -r | Resume session | | -i | Execute prompt then continue interactive |

Comparison Workflow

  1. Provide Claude's response first
  2. Run same query via gemini -p "prompt"
  3. Present both for comparison

Best Practices

  • Always use -p for automation/one-shot queries
  • Quote prompts w/ double quotes
  • Use -o json for parsing
  • Pipe files for context