gemini-cli

A setup guide for using a code-refactoring instruction with Gemini CLI. Code refactoring means restructuring existing code to improve it without changing what it should do.

In plain words
What is it for?
Use it to configure GEMINI.md, a system instruction or settings.json, then ask Gemini to clean up code, extract logic or replace difficult callbacks.
Why use it?
It explains where to place the instructions so Gemini can follow the same refactoring process across a project or session.

Agent

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/muhiminosim/code-refactoring-skill/gemini-cli
Clone the repo
git clone --depth 1 https://github.com/MuhiminOsim/code-refactoring-skill
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 236 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00236
Opus 5 $0.00000 $0.00118
Sonnet 5 $0.00000 $0.00047
Haiku 4.5 $0.00000 $0.00024

Measured yesterday against content hash 9e803b180d2e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

gemini-cli scanned grade B with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

Add to `~/.gemini/settings.json`:

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -o GEMINI.md \
agents/gemini-cli.md · 47 lines

What it actually says

Setup: Gemini CLI

Gemini CLI automatically loads GEMINI.md from the project root (and parent directories).

curl -o GEMINI.md \
  https://raw.githubusercontent.com/MuhiminOsim/code-refactoring-skill/main/PROMPT.md

Via --system-instruction flag

gemini --system-instruction "$(cat PROMPT.md)" "refactor src/orders.ts"

Or set once as an alias:

alias gemini-refactor='gemini --system-instruction "$(cat ~/.refactor-skill/PROMPT.md)"'
gemini-refactor "extract the discount logic from processOrder"

Via settings.json

Add to ~/.gemini/settings.json:

{
  "systemInstruction": "<paste PROMPT.md contents here>"
}

Usage

# Interactive session
gemini

> Refactor processOrder in src/orders.ts — it's 200 lines

> Extract the validation logic into a separate function

> Replace this callback pyramid with async/await
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 47 lines · 0 tokens per session scan B 9e803b180d2e

Subscribe to this mod's changes

gemini-cli is an agent published in the GitHub repository MuhiminOsim/code-refactoring-skill (5 stars, last pushed 3mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 236 tokens. A static security scan graded it B with 2 findings (reads agent configuration directories, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Related

Other agents, from other repositories

Demonstrate

Agent for demonstrating VS Code features.

microsoft/vscode · 10 tokens

playwright-test-generator

Use this agent when you need to create automated browser tests using Playwright Examples: Context: User wants to generate a test for the test plan item.

microsoft/playwright · 151 tokens

.NET-Notebook-Migration-Agent

Expert .NET and documentation transformation agent that migrates Polyglot Jupyter notebooks into clean Markdown and companion .NET sample code.

microsoft/ai-agents-for-beginners · 33 tokens

AVM Owner Triage

Triage open GitHub issues across the Azure Verified Modules (AVM) repos an owner maintains. Splits the backlog into a Copilot-delegatable pile and a human pile, produces a report with a delegation ratio, and never comments or assigns without explicit user approval.

github/awesome-copilot · 61 tokens

Ultimate Transparent Thinking Beast Mode

Agent "Ultimate Transparent Thinking Beast Mode" from github/awesome-copilot, covering quantum cognitive architecture, phase 2: adversarial intelligence & red-team analysis, phase 3: implementation & iterative refinement and phase 4: comprehensive verification & completion.

github/awesome-copilot · 11 tokens

code-reviewer

Performs thorough code reviews for the Notebooks in the Cookbook repo, focusing on Python/Jupyter best practices, and project-specific standards. Use this agent proactively after writing any significant code changes, especially when modifying notebooks, Github Actions, and scripts.

anthropics/claude-cookbooks · 52 tokens