Best Gemini Rules in 2026

41 community-contributed rules

Gemini rules and system instructions customize Google's Gemini AI for coding tasks. Define behavior, output format, and domain expertise.

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What are Gemini Rules?

Gemini Rules are system instructions that configure Google's Gemini AI for your specific use case. Whether you're using Gemini in Google AI Studio, via the API, or through compatible IDEs, these rules shape the AI's responses.

Well-crafted Gemini instructions can turn the general-purpose AI into a specialized coding assistant that understands your tech stack, follows your conventions, and produces code that matches your style.

How to Install Gemini Rules

1Open your Gemini interface or API configuration
2Navigate to System Instructions or Custom Instructions
3Paste the rule content into the system prompt field
4Save and start a new conversation for rules to take effect

File name: system-instruction.md

Gemini Rules by Technology

Python Javascript Go Kotlin Flutter

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System instructions for Gemini to help with Next.js App Router development.

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Gemini Security Best Practices

Generate secure Python code

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Generate web scraping code safely

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Gemini Python Expert

Configure Gemini as a Python expert for data science and backend development.

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Gemini Machine Learning Pipelines

Generate ML pipeline code with scikit-learn

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Gemini Streamlit Apps

Generate Streamlit data apps

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Generate NLP code with transformers

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Gemini TypeScript Master

Configure Gemini as a TypeScript expert for type-safe development.

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Gemini API Client Generation

Generate type-safe API clients

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Gemini Tailwind CSS Expert

Configure Gemini to help with Tailwind CSS styling and design systems.

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Gemini FastAPI Development

Generate robust FastAPI applications

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Gemini Deep Learning with PyTorch

Generate PyTorch model and training code

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Generate dbt transformation models

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Gemini Node.js Backend

System instructions for Gemini to assist with Node.js backend development.

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Gemini LangChain Agents

Generate LangChain agent code

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Gemini Jupyter Notebooks

Generate well-structured notebooks

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Gemini Go Developer

System instructions for Gemini to assist with Go backend development.

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Frequently Asked Questions

What are Gemini system instructions?

Gemini system instructions are prompts that define how the AI should behave, what expertise it should demonstrate, and how it should format responses. They're applied at the start of every conversation.

Where can I use Gemini rules?

Gemini rules can be used in Google AI Studio, the Gemini API, Google Workspace integrations, and any IDE or tool that supports Gemini as a backend AI model.

Do Gemini rules persist across sessions?

In Google AI Studio, saved system instructions persist. For API usage, you need to include the system instruction with each new conversation or session.

Can't find the right rule?

Create your own Gemini rules and share them with the community.

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