Gemini LLM Skill

Invoke Google Gemini models for text generation, reasoning, code analysis, and complex tasks using the Python

google-genai

Available Models

gemini-3-pro-preview

gemini-2.5-pro

gemini-2.5-flash

gemini-2.5-flash-lite

Configuration

API Key Location:

C:\Users\USERNAME\env

Default API Key:

${GEMINI_API_KEY}

Usage

Basic Text Generation

python -c "
from google import genai
client = genai.Client(api_key=os.environ.get("GEMINI_API_KEY"))
response = client.models.generate_content(
    model='gemini-3-pro-preview',
    contents='YOUR_PROMPT_HERE'
)
print(response.text)
"

With System Instructions

python -c "
from google import genai
from google.genai import types

client = genai.Client(api_key=os.environ.get("GEMINI_API_KEY"))
response = client.models.generate_content(
    model='gemini-3-pro-preview',
    contents='YOUR_PROMPT_HERE',
    config=types.GenerateContentConfig(
        system_instruction='You are a helpful coding assistant.',
        temperature=0.7,
        max_output_tokens=8192
    )
)
print(response.text)
"

Streaming Response

python -c "
from google import genai
client = genai.Client(api_key=os.environ.get("GEMINI_API_KEY"))
for chunk in client.models.generate_content_stream(
    model='gemini-3-pro-preview',
    contents='YOUR_PROMPT_HERE'
):
    print(chunk.text, end='', flush=True)
print()
"

Workflow

When this skill is invoked:

1. Parse the user request to determine:

   • The prompt/task to send to Gemini
   • Which model to use (default:

     gemini-3-pro-preview

     )
   • Any configuration options (temperature, max tokens, system instruction)

2. Select the appropriate model:

   • Complex reasoning/analysis →

     gemini-3-pro-preview

   • Deep planning/thinking →

     gemini-2.5-pro

   • Quick responses →

     gemini-2.5-flash

   • Bulk/simple tasks →

     gemini-2.5-flash-lite

3. Execute the Python command using Bash tool:

   python -c "
   from google import genai
   client = genai.Client(api_key=os.environ.get("GEMINI_API_KEY"))
   response = client.models.generate_content(
       model='MODEL_ID',
       contents='''PROMPT'''
   )
   print(response.text)
   "
   

4. Return the response to the user

Example Invocations

Code Review

python -c "
from google import genai
client = genai.Client(api_key=os.environ.get("GEMINI_API_KEY"))
response = client.models.generate_content(
    model='gemini-3-pro-preview',
    contents='''Review this Python code for bugs and improvements:

def calculate_total(items):
    total = 0
    for item in items:
        total += item.price * item.quantity
    return total
'''
)
print(response.text)
"

Explain Concept

python -c "
from google import genai
client = genai.Client(api_key=os.environ.get("GEMINI_API_KEY"))
response = client.models.generate_content(
    model='gemini-2.5-flash',
    contents='Explain async/await in Python in simple terms'
)
print(response.text)
"

Generate Code

python -c "
from google import genai
from google.genai import types

client = genai.Client(api_key=os.environ.get("GEMINI_API_KEY"))
response = client.models.generate_content(
    model='gemini-3-pro-preview',
    contents='Write a Python function to merge two sorted lists',
    config=types.GenerateContentConfig(
        system_instruction='You are an expert Python developer. Write clean, efficient, well-documented code.',
        temperature=0.3
    )
)
print(response.text)
"

Multi-turn Conversations

For conversations with history:

python -c "
from google import genai
from google.genai import types

client = genai.Client(api_key=os.environ.get("GEMINI_API_KEY"))

history = [
    types.Content(role='user', parts=[types.Part(text='What is Python?')]),
    types.Content(role='model', parts=[types.Part(text='Python is a high-level programming language...')]),
    types.Content(role='user', parts=[types.Part(text='How do I install it?')])
]

response = client.models.generate_content(
    model='gemini-3-pro-preview',
    contents=history
)
print(response.text)
"

Error Handling

The skill handles common errors:

• 404 Not Found: Model not available - fall back to gemini-2.5-pro
• Rate Limiting: Wait and retry with exponential backoff
• Token Limits: Truncate input or use streaming for large outputs

Notes

• Gemini 3 Pro is NOT available via the Gemini CLI (v0.17.1) - must use Python SDK
• The

  thought_signature

  warning can be ignored - it's internal model metadata
• For long prompts, use triple quotes and escape special characters
• Maximum context: varies by model (check documentation)

Tools to Use

• Bash: Execute Python commands
• Read: Load files to include in prompts
• Write: Save Gemini responses to files