Agent Templates

The Agent Starter Pack follows a "bring your own agent" approach. It provides several production-ready agent templates designed to accelerate your development while offering the flexibility to use your preferred agent framework or pattern.

Available Templates

Agent Name	Description	Use Case
adk_base	A base ReAct agent implemented using Google's Agent Development Kit	General purpose conversational agent
adk_a2a_base	An ADK agent with Agent2Agent (A2A) Protocol support	Distributed agent communication and interoperability across frameworks
agentic_rag	A RAG agent for document retrieval and Q&A	Document search and question answering
langgraph_base_react	A base ReAct agent using LangGraph	Graph based conversational agent
crewai_coding_crew	A multi-agent system implemented with CrewAI	Collaborative coding assistance
adk_live	A real-time multimodal RAG agent	Audio/video/text chat with knowledge base

Choosing the Right Template

When selecting a template, consider these factors:

1. Primary Goal: Are you building a conversational bot, a Q&A system over documents, a task-automation crew, or something else?
2. Core Pattern/Framework: Do you have a preference for Google's ADK, LangChain/LangGraph, CrewAI, or implementing a pattern like RAG directly? The Starter Pack supports various approaches.
3. Reasoning Complexity: Does your agent need complex planning and tool use (like ReAct), or is it more focused on retrieval and synthesis (like basic RAG)?
4. Collaboration Needs: Do you need multiple specialized agents working together?
5. Modality: Does your agent need to process or respond with audio, video, or just text?

Template Details

ADK Base (adk_base)

This template provides a minimal example of a ReAct agent built using Google's Agent Development Kit (ADK). It demonstrates core ADK concepts like agent creation and tool integration, enabling reasoning and tool selection. Ideal for:

• Getting started with agent development on Google Cloud.
• Building general-purpose conversational agents.
• Learning the ADK framework and ReAct pattern.

ADK A2A Base (adk_a2a_base)

This template integrates Google's Agent Development Kit (ADK) with the Agent2Agent (A2A) Protocol, enabling distributed agent communication and interoperability across different frameworks and languages. It demonstrates core ADK concepts while providing standardized interfaces for building distributed agent systems. Ideal for:

• Exploring the A2A protocol and agent interoperability patterns.
• Building distributed, multi-agent systems that communicate across frameworks.
• Implementing microservices-based agent architectures.

Agentic RAG (agentic_rag)

Built on the ADK, this template implements Retrieval-Augmented Generation (RAG) with a production-ready data ingestion pipeline for document-based question answering. It allows you to ingest, process, and embed custom data to enhance response relevance. Features include:

• Automated data ingestion pipeline for custom data.
• Flexible datastore options: Vertex AI Search and Vertex AI Vector Search.
• Generation of custom embeddings for enhanced semantic search.
• Answer synthesis from retrieved context.
• Infrastructure deployment via Terraform and a choice of CI/CD runners (Google Cloud Build or GitHub Actions).

LangGraph Base ReAct (langgraph_base_react)

This template provides a minimal example of a ReAct agent built using LangGraph. It serves as an excellent starting point for developing agents with graph-based structures, offering:

• Explicit state management for complex, multi-step reasoning flows.
• Fine-grained control over reasoning cycles.
• Robust tool integration and error handling capabilities.
• Streaming response support using Vertex AI.
• Includes a basic search tool to demonstrate tool usage.

CrewAI Coding Crew (crewai_coding_crew)

This template combines CrewAI's multi-agent collaboration with LangGraph's conversational control to create an interactive coding assistant. It orchestrates specialized agents (e.g., Senior Engineer, QA Engineer) to understand requirements and generate code. Key features include:

• Interactive requirements gathering through natural dialogue (LangGraph).
• Collaborative code development by a crew of specialized AI agents (CrewAI).
• Sequential processing for tasks from requirements to implementation and QA.
• Ideal for complex tasks requiring delegation and simulating team collaboration.

Live API (adk_live)

Powered by Google Gemini, this template showcases a real-time, multimodal conversational RAG agent using the Vertex AI Live API. Features include:

• Handles audio, video, and text interactions.
• Leverages tool calling.
• Real-time bidirectional communication via WebSockets for low-latency chat.
• Production-ready Python backend (FastAPI) and React frontend.
• Includes feedback collection capabilities.

Customizing Templates

All templates are provided as starting points and are designed for customization:

1. Choose a template that most closely matches your needs.
2. Create a new agent instance based on the selected template.
3. Familiarize yourself with the code structure, focusing on the agent logic, tool definitions, and any UI components.
4. Modify and extend the code: adjust prompts, add or remove tools, integrate different data sources, change the reasoning logic, or update the framework versions as needed.

Have fun building your agent!