How do I install the Gemini skill?

Run npx skillmds@latest add tomevault-io/gemini-8 in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Gemini safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: CAUTION, Skill Scanner: PASS. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Gemini?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Gemini free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Gemini?

tomevault-io (@tomevault-io) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Gemini by tomevault-io — Agent Skill

Name: Gemini
Author: tomevault-io

File contents

Gemini Subagent

Run Google Gemini CLI for second opinions and external reviews.

Availability Check

Before using Gemini, verify it's installed:

which gemini >/dev/null 2>&1 || echo "GEMINI_NOT_INSTALLED"

If not installed, inform the user: "Gemini CLI is not installed. Skipping Gemini review."

API Key

Gemini requires GEMINI_API_KEY in the environment. Load it from the .env file in the current working directory (the folder your current agent session is running from):

GEMINI_API_KEY=$(grep '^GEMINI_API_KEY=' .env 2>/dev/null | cut -d= -f2-)
export GEMINI_API_KEY

If .env doesn't exist or doesn't contain GEMINI_API_KEY, inform the user: "GEMINI_API_KEY not found in .env file."

Execution Pattern

GEMINI_API_KEY=$(grep '^GEMINI_API_KEY=' .env 2>/dev/null | cut -d= -f2-) gemini -p "$PROMPT" --yolo 2>&1

Flags

Flag	Purpose
`-p` / `--prompt`	Non-interactive mode with direct prompt
`--yolo`	Auto-approve all tool calls without prompts
`2>&1`	Capture both stdout and stderr

Timeout

Gemini can take several minutes for complex prompts. Use 15 minute timeout:

timeout 900 gemini -p "$PROMPT" --yolo 2>&1

Usage Examples

Simple Question

timeout 900 gemini -p "What are the tradeoffs between Redis and Memcached for session storage?" --yolo 2>&1

Code Review

DIFF=$(git diff main...HEAD)
timeout 900 gemini -p "Review this diff for issues:

$DIFF

List concerns with severity (blocking/important/nice-to-have)." --yolo 2>&1

With Working Directory

Gemini runs in current directory by default. Change directory before running:

cd /path/to/repo && timeout 900 gemini -p "Analyze the architecture of this codebase" --yolo 2>&1

GitHub PR Review

Gemini has access to gh CLI when tools are enabled. Pass the PR URL and let it fetch the diff:

timeout 900 gemini -p "Review this PR: https://github.com/owner/repo/pull/123

Use gh CLI to get the diff and review for issues." --yolo 2>&1

Notes

Gemini provides a different perspective from Claude and Codex
Each call is stateless - no conversation continuity
--yolo mode auto-approves tool use (shell commands, file reads, etc.)
API costs apply per call

Converted and distributed by TomeVault — claim your Tome and manage your conversions.

---name: gemini-8description: Run Google Gemini CLI as a subagent for second opinions, code reviews, and questions. Use when you want a different AI model's perspective. Use when this capability is needed.---# Gemini SubagentRun Google Gemini CLI for second opinions and external reviews.## Availability CheckBefore using Gemini, verify it's installed:```bashwhich gemini >/dev/null 2>&1 || echo "GEMINI_NOT_INSTALLED"```If not installed, inform the user: "Gemini CLI is not installed. Skipping Gemini review."## API KeyGemini requires `GEMINI_API_KEY` in the environment. Load it from the `.env` file in the current working directory (the folder your current agent session is running from):```bashGEMINI_API_KEY=$(grep '^GEMINI_API_KEY=' .env 2>/dev/null | cut -d= -f2-)export GEMINI_API_KEY```If `.env` doesn't exist or doesn't contain `GEMINI_API_KEY`, inform the user: "GEMINI_API_KEY not found in .env file."## Execution Pattern```bashGEMINI_API_KEY=$(grep '^GEMINI_API_KEY=' .env 2>/dev/null | cut -d= -f2-) gemini -p "$PROMPT" --yolo 2>&1```### Flags| Flag | Purpose ||------|---------|| `-p` / `--prompt` | Non-interactive mode with direct prompt || `--yolo` | Auto-approve all tool calls without prompts || `2>&1` | Capture both stdout and stderr |### TimeoutGemini can take several minutes for complex prompts. Use 15 minute timeout:```bashtimeout 900 gemini -p "$PROMPT" --yolo 2>&1```## Usage Examples### Simple Question```bashtimeout 900 gemini -p "What are the tradeoffs between Redis and Memcached for session storage?" --yolo 2>&1```### Code Review```bashDIFF=$(git diff main...HEAD)timeout 900 gemini -p "Review this diff for issues:$DIFFList concerns with severity (blocking/important/nice-to-have)." --yolo 2>&1```### With Working DirectoryGemini runs in current directory by default. Change directory before running:```bashcd /path/to/repo && timeout 900 gemini -p "Analyze the architecture of this codebase" --yolo 2>&1```### GitHub PR ReviewGemini has access to `gh` CLI when tools are enabled. Pass the PR URL and let it fetch the diff:```bashtimeout 900 gemini -p "Review this PR: https://github.com/owner/repo/pull/123Use gh CLI to get the diff and review for issues." --yolo 2>&1```## Notes- Gemini provides a different perspective from Claude and Codex- Each call is stateless - no conversation continuity- `--yolo` mode auto-approves tool use (shell commands, file reads, etc.)- API costs apply per call---> Converted and distributed by [TomeVault](https://tomevault.io/claim/yuvasee) — claim your Tome and manage your conversions.

Frequently asked questions

Gemini