Google Agent Development Kit

pip install google-adk mem0ai

import os
from google.adk.agents import Agent
from google.adk.runners import Runner
from google.adk.sessions import InMemorySessionService
from google.genai import types
from mem0 import MemoryClient

# Set up environment variables
os.environ["GOOGLE_API_KEY"] = "your-google-api-key"
os.environ["MEM0_API_KEY"] = "your-mem0-api-key"

# Initialize Mem0 client
mem0 = MemoryClient()

# Define memory function tools
def search_memory(query: str, user_id: str) -> dict:
    """Search through past conversations and memories"""
    memories = mem0.search(query, user_id=user_id)
    if memories:
        memory_context = "\n".join([f"- {mem['memory']}" for mem in memories])
        return {"status": "success", "memories": memory_context}
    return {"status": "no_memories", "message": "No relevant memories found"}

def save_memory(content: str, user_id: str) -> dict:
    """Save important information to memory"""
    try:
        mem0.add([{"role": "user", "content": content}], user_id=user_id)
        return {"status": "success", "message": "Information saved to memory"}
    except Exception as e:
        return {"status": "error", "message": f"Failed to save memory: {str(e)}"}

# Create agent with memory capabilities
personal_assistant = Agent(
    name="personal_assistant",
    model="gemini-2.0-flash",
    instruction="""You are a helpful personal assistant with memory capabilities.
    Use the search_memory function to recall past conversations and user preferences.
    Use the save_memory function to store important information about the user.
    Always personalize your responses based on available memory.""",
    description="A personal assistant that remembers user preferences and past interactions",
    tools=[search_memory, save_memory]
)

def chat_with_agent(user_input: str, user_id: str) -> str:
    """
    Handle user input with automatic memory integration.

    Args:
        user_input: The user's message
        user_id: Unique identifier for the user

    Returns:
        The agent's response
    """
    # Set up session and runner
    session_service = InMemorySessionService()
    session = session_service.create_session(
        app_name="memory_assistant",
        user_id=user_id,
        session_id=f"session_{user_id}"
    )
    runner = Runner(agent=personal_assistant, app_name="memory_assistant", session_service=session_service)

    # Create content and run agent
    content = types.Content(role='user', parts=[types.Part(text=user_input)])
    events = runner.run(user_id=user_id, session_id=session.id, new_message=content)

    # Extract final response
    for event in events:
        if event.is_final_response():
            response = event.content.parts[0].text

            return response

    return "No response generated"

# Example usage
if __name__ == "__main__":
    response = chat_with_agent(
        "I love Italian food and I'm planning a trip to Rome next month",
        user_id="alice"
    )
    print(response)

from google.adk.tools.agent_tool import AgentTool

# Travel specialist agent
travel_agent = Agent(
    name="travel_specialist",
    model="gemini-2.0-flash",
    instruction="""You are a travel planning specialist. Use get_user_context to
    understand the user's travel preferences and history before making recommendations.
    After providing advice, use store_interaction to save travel-related information.""",
    description="Specialist in travel planning and recommendations",
    tools=[search_memory, save_memory]
)

# Health advisor agent
health_agent = Agent(
    name="health_advisor",
    model="gemini-2.0-flash",
    instruction="""You are a health and wellness advisor. Use get_user_context to
    understand the user's health goals and dietary preferences.
    After providing advice, use store_interaction to save health-related information.""",
    description="Specialist in health and wellness advice",
    tools=[search_memory, save_memory]
)

# Coordinator agent that delegates to specialists
coordinator_agent = Agent(
    name="coordinator",
    model="gemini-2.0-flash",
    instruction="""You are a coordinator that delegates requests to specialist agents.
    For travel-related questions (trips, hotels, flights, destinations), delegate to the travel specialist.
    For health-related questions (fitness, diet, wellness, exercise), delegate to the health advisor.
    Use get_user_context to understand the user before delegation.""",
    description="Coordinates requests between specialist agents",
    tools=[
        AgentTool(agent=travel_agent, skip_summarization=False),
        AgentTool(agent=health_agent, skip_summarization=False)
    ]
)

def chat_with_specialists(user_input: str, user_id: str) -> str:
    """
    Handle user input with specialist agent delegation and memory.

    Args:
        user_input: The user's message
        user_id: Unique identifier for the user

    Returns:
        The specialist agent's response
    """
    session_service = InMemorySessionService()
    session = session_service.create_session(
        app_name="specialist_system",
        user_id=user_id,
        session_id=f"session_{user_id}"
    )
    runner = Runner(agent=coordinator_agent, app_name="specialist_system", session_service=session_service)

    content = types.Content(role='user', parts=[types.Part(text=user_input)])
    events = runner.run(user_id=user_id, session_id=session.id, new_message=content)

    for event in events:
        if event.is_final_response():
            response = event.content.parts[0].text

            # Store the conversation in shared memory
            conversation = [
                {"role": "user", "content": user_input},
                {"role": "assistant", "content": response}
            ]
            mem0.add(conversation, user_id=user_id)

            return response

    return "No response generated"

# Example usage
response = chat_with_specialists("Plan a healthy meal for my Italy trip", user_id="alice")
print(response)

def interactive_chat():
    """Interactive chat interface with memory and ADK"""
    user_id = input("Enter your user ID: ") or "demo_user"
    print(f"Chat started for user: {user_id}")
    print("Type 'quit' to exit")
    print("=" * 50)

    while True:
        user_input = input("\nYou: ")

        if user_input.lower() == 'quit':
            print("Goodbye! Your conversation has been saved to memory.")
            break
        else:
            response = chat_with_specialists(user_input, user_id)
            print(f"Assistant: {response}")

if __name__ == "__main__":
    interactive_chat()

# Configure memory search with metadata
memories = mem0.search(
    query="travel preferences",
    user_id="alice",
    limit=5,
    filters={"category": "travel"}  # Filter by category if supported
)

# Configure agent with custom model settings
agent = Agent(
    name="custom_agent",
    model="gemini-2.0-flash",  # or use LiteLLM for other models
    instruction="Custom agent behavior",
    tools=[memory_tools],
    # Additional ADK configurations
)

# Use Google Cloud Vertex AI instead of AI Studio
os.environ["GOOGLE_GENAI_USE_VERTEXAI"] = "True"
os.environ["GOOGLE_CLOUD_PROJECT"] = "your-project-id"
os.environ["GOOGLE_CLOUD_LOCATION"] = "us-central1"