Gemini System Agents

A curated collection of system prompt variants for the Gemini CLI. Transform your Gemini assistant into specialized agents with different personalities, expertise areas, and communication styles.

What is This?

This is a Gemini CLI extension that provides a variety of pre-configured system prompts. Each "agent" is a different persona that changes how Gemini responds to your queries - from serious engineering specialists to comedy relief characters.

Installation

Install via the Gemini CLI extension system:

gemini extensions install https://github.com/jduncan-rva/gemini-system-agents

This clones the extension to ~/.gemini/extensions/system-agents/. All agent prompts are available in the system-agents/ subdirectory.

Available Agents

Engineering & Development

• architect.md - Software architecture and design planning specialist. Focuses on research, analysis, and documentation. Does not write implementation code.

• code-generator.md - Streamlined code generation assistant. Expert in all programming languages and frameworks. Generates clean, idiomatic code with minimal explanations.

Creative & Entertainment

• creative-writer.md - Creative writing specialist for poetry, prose, storytelling, and all forms of creative expression.

• comedian.md - Dad joke comedian. Responds to any input with related dad jokes. Wholesome, punny humor designed to elicit groans.

Comedy Relief Agents

• pirate.md - Speaks exclusively in pirate dialect. Technically accurate but delivered with full pirate persona (Arr matey!).

• shakespeare.md - Speaks in Shakespearean English. Eloquent, dramatic, uses thou/thee/thy. Occasionally uses iambic pentameter.

• yoda.md - Speaks like Yoda from Star Wars. Object-subject-verb syntax, wise and patient teaching style.

• cowboy.md - Speaks in Old West cowboy dialect. Straight-shooting, uses Western and ranch terminology.

• gen-z.md - Speaks in Gen Z slang and internet culture. No cap, it's bussin fr fr.

Usage

To use an agent, set the GEMINI_SYSTEM_MD environment variable:

export GEMINI_SYSTEM_MD=~/.gemini/extensions/system-agents/system-agents/architect.md
gemini

Quick Examples

# Use the architect agent for system design
export GEMINI_SYSTEM_MD=~/.gemini/extensions/system-agents/system-agents/architect.md
gemini

# Use the code generator for quick code snippets
export GEMINI_SYSTEM_MD=~/.gemini/extensions/system-agents/system-agents/code-generator.md
gemini

# Use pirate agent for fun while coding
export GEMINI_SYSTEM_MD=~/.gemini/extensions/system-agents/system-agents/pirate.md
gemini

Creating Custom Agents

You can create your own system prompts by adding .md files to ~/.gemini/extensions/system-agents/system-agents/. Each file should contain a complete system prompt that defines:

• The agent's core behavior and personality
• How it should respond to user queries
• Any specific vocabulary or speech patterns
• Technical accuracy requirements
• Example interactions

See the existing agents for reference.

Agent Design Philosophy

All agents in this collection follow these principles:

1. Technical Accuracy - Never sacrifice correctness for personality
2. Helpful - Agents should actually help users accomplish tasks
3. Clear Boundaries - Each agent has a well-defined purpose and style
4. Robustness - Agents include detailed guidelines for consistent behavior

License

MIT License - see LICENSE file for details.

Author

Jamie Duncan

Contributing

Contributions welcome! Consider adding:

• New specialized engineering agents (debugger, optimizer, security auditor)
• Additional creative agents (poet, screenwriter, technical writer)
• More comedy relief agents (other accents, characters, or styles)
• Improvements to existing agent prompts

When creating agents, ensure they are:

• Technically accurate and helpful
• Well-documented with clear behavior guidelines
• Tested for consistent responses
• Fun or useful (or both!)