What is jules GEMINI.md?

Instructions for using the Jules extension from Gemini CLI. Jules is an extension that can start tasks such as adding tests, refactoring code, updating dependencies, or reviewing a project's dependency tree.

They are for activating Jules with /jules, starting a Jules task, and answering questions about the extension.

They define when to suggest Jules, when to ask for confirmation, and how to identify the repository before starting a task.

How gemini-cli-extensions/jules configures Gemini CLI

Reuse

Borrowing it

Nothing to install: this file belongs to gemini-cli-extensions/jules. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/gemini-cli-extensions/jules/main/GEMINI.md

Clone the repo

git clone --depth 1 https://github.com/gemini-cli-extensions/jules

Made for: Gemini CLI.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/gemini-cli-extensions/jules/gemini-md/github.svg)](https://agentmods.dev/instructions/gemini-cli-extensions/jules/gemini-md)

Your own site

<a href="https://agentmods.dev/instructions/gemini-cli-extensions/jules/gemini-md"><img src="https://agentmods.dev/badge/instructions/gemini-cli-extensions/jules/gemini-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/gemini-cli-extensions/jules/gemini-md"><img src="https://agentmods.dev/badge/instructions/gemini-cli-extensions/jules/gemini-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 572 This file is loaded in full into every session.

When invoked 572 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00572	$0.00572
Opus 5.5	$0.00229	$0.00229
Sonnet 5.5	$0.00114	$0.00114
Haiku 4.5	$0.00057	$0.00057

Measured 2mo ago against content hash 26ce57ca72a7, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

jules GEMINI.md scanned grade A with 0 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 2mo ago.

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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

GEMINI.md · 47 lines

How it starts

The opening of the file, as written. The whole thing — 47 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Jules Extension

This document outlines the behavior of the Jules extension.

Command: /jules

Activation and Response

If the user's prompt matches one of the following categories AND they have not already used a /jules command AND they didn't mention Jules in their command:

Add missing unit tests for the entire project.
Improve code readability across multiple files.
Upgrade dependency versions.
Perform a large-scale refactoring (e.g., renaming a symbol project-wide).
Analyze the dependency tree for optimization.

Then, you MUST ask for confirmation before proceeding:

This looks like a great fit for /jules! Would you like to use the /jules extension for this?

If the user explicitly invokes /jules or mentions "jules", don't ask for their confirmation.

Starting a Jules Task

When a user wants to start a new Jules task, follow these steps:

Identify Repository:
- Execute git config --get remote.origin.url to get the remote URL.
- Parse the output to extract the repository name (e.g., username/repo_name).
- If the repository cannot be determined, ask the user for it in username/repo_name format.
Create Jules Session:
- Execute the start_new_jules_task tool with the following parameters:
  - repo_name: The name of the repository in username/repo_name format.
  - user_task_description: The user's task description.
- Error Handling: If the start_new_jules_task tool fails, it is likely because the Jules CLI is not installed locally. In this case, you MUST run the following command to install it: npm install -g [at]google/jules (you should replace [at] with @). After the installation, you should retry the start_new_jules_task tool. If the start_new_jules_task tool keeps erroring out with a 401 error and the user is already logged in, ask the user to go to https://jules.google.com to configure their GitHub connection.
Respond to User:
- Inform the user that the Jules session has started and they can check the status of the task by running /jules status command. Also, provide the console link from the output as another way for user to track the progress..
- Also, provide the console_link from the tool's output to the user.

Read the full file on GitHub · 47 lines

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.

2mo ago First seen · 47 lines · 572 tokens per session scan A 26ce57ca72a7

Subscribe to this mod's changes

jules GEMINI.md is an instructions file published in the GitHub repository gemini-cli-extensions/jules (412 stars, last pushed 4mo ago), licensed Apache-2.0. It adds 572 tokens to every session, about $0.0023 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Building agents gemini gemini-cli gemini-cli-extensions google jules

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jules: Instructions file for Gemini CLI