gemini-cli

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Ask Gemini via the local `gemini` CLI (no MCP). Use when the user says "ask gemini" / "use gemini", wants a second opinion, needs large-context `@path` analysis, sandbox runs, or structured change-mode edits.

3installs

Sourcex-zero-l/agent-skills

Added on2026-02-14

NPX Install

npx skill4agent add x-zero-l/agent-skills gemini-cli

SKILL.md Content

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Gemini CLI Skill

Use Google’s

gemini

CLI as an external “second brain” when you need a very large context window, a second opinion, or safe sandbox execution. This skill does not use MCP; it runs the local CLI directly.

When To Use

Use this skill when the user asks to:

“Ask Gemini” / “Use Gemini”
Analyze or summarize large files or directories (especially with
```
@path
```
references)
Brainstorm options with a specific framework (SCAMPER, design thinking, etc.)
Generate structured edit suggestions (“change mode”) that can be applied deterministically

Prerequisites

```
gemini
```
CLI is installed and configured (e.g.
```
gemini --version
```
works)
You are allowed to run local shell commands in this environment
For sandbox execution, Gemini CLI supports
```
-s/--sandbox
```
(see
```
gemini --help
```
)

Core Commands

One-shot query (plain)

bash

gemini "Explain what this code does: @src/main.ts"

Choose a model

bash

gemini -m gemini-3-pro-preview "..."
gemini -m gemini-3-flash-preview "..."

Sandbox mode

bash

gemini -s "Safely test @scripts/example.py and explain the results."

Helper Script (Recommended)

This skill ships with a dependency-free wrapper that mirrors the core behavior of

gemini-mcp-tool

without MCP:

skills/gemini-cli/scripts/gemini-tool.mjs

Important: Gemini CLI can only read files under its current “project directory” (typically the process working directory). Run the wrapper from the repo you want Gemini to read, or pass

--cwd

.

bash

node skills/gemini-cli/scripts/gemini-tool.mjs help

Ask Gemini (wrapper)

bash

node skills/gemini-cli/scripts/gemini-tool.mjs ask --prompt "Summarize @. in 5 bullets."
node skills/gemini-cli/scripts/gemini-tool.mjs ask --cwd /path/to/project --prompt "Summarize @. in 5 bullets."
node skills/gemini-cli/scripts/gemini-tool.mjs ask --prompt "..." --model gemini-3-pro-preview
node skills/gemini-cli/scripts/gemini-tool.mjs ask --prompt "..." --sandbox

Brainstorm (wrapper)

bash

node skills/gemini-cli/scripts/gemini-tool.mjs brainstorm --prompt "How should we design onboarding?" --methodology scamper --ideaCount 12

Change Mode (structured edits + chunk caching)

Use change mode when you want Gemini to output deterministic OLD/NEW blocks that can be applied by exact string matching.

bash

node skills/gemini-cli/scripts/gemini-tool.mjs ask --changeMode --prompt "In @src/foo.ts, rename Foo to Bar and update call sites."

If the response is chunked, the output includes a

cacheKey

. Fetch the next chunk:

bash

node skills/gemini-cli/scripts/gemini-tool.mjs fetch-chunk --cacheKey <key> --chunkIndex 2

Safety Rules

Never execute destructive commands from Gemini output without explicit user approval.
In change mode, the
```
OLD
```
block must match the file content exactly; otherwise, do not apply the edit.
Prefer read-only analysis unless the user explicitly requests changes.

gemini-cli

NPX Install

Tags

SKILL.md Content

Gemini CLI Skill

When To Use

Prerequisites

Core Commands

One-shot query (plain)

Choose a model

Sandbox mode

Helper Script (Recommended)

Ask Gemini (wrapper)

Brainstorm (wrapper)

Change Mode (structured edits + chunk caching)

Safety Rules