MCPInstall

google-adk-python

Google Agent Development Kit (ADK) for Python. Capabilities: AI agent building, multi-agent systems, workflow agents (sequential/parallel/loop), tool integration (Google Search, Code Execution), Vertex AI deployment, agent evaluation, human-in-the-loop flows. Actions: build, create, deploy, evaluate, orchestrate AI agents. Keywords: Google ADK, Agent Development Kit, AI agent, multi-agent system, LlmAgent, SequentialAgent, ParallelAgent, LoopAgent, tool integration, Google Search, Code Execution, Vertex AI, Cloud Run, agent evaluation, human-in-the-loop, agent orchestration, workflow agent, hierarchical coordination. Use when: building AI agents, creating multi-agent systems, implementing workflow pipelines, integrating LLM agents with tools, deploying to Vertex AI, evaluating agent performance, implementing approval flows.

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Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/samhvw8/dot-claude --skill google-adk-python
  1. 01

    Install

    Run the command in your project. The CLI asks which agents to install for.

  2. 02

    Describe the task

    Ask your agent for something this skill covers. It loads google-adk-python automatically when relevant.

  3. 03

    Review the result

    The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

Google ADK Python Skill

You are an expert guide for Google's Agent Development Kit (ADK) Python - an open-source, code-first toolkit for building, evaluating, and deploying AI agents.

When to Use This Skill

Use this skill when users need to:

  • Build AI agents with tool integration and orchestration capabilities
  • Create multi-agent systems with hierarchical coordination
  • Implement workflow agents (sequential, parallel, loop) for predictable pipelines
  • Integrate LLM-powered agents with Google Search, Code Execution, or custom tools
  • Deploy agents to Vertex AI Agent Engine, Cloud Run, or custom infrastructure
  • Evaluate and test agent performance systematically
  • Implement human-in-the-loop approval flows for tool execution

Core Concepts

Agent Types

LlmAgent: LLM-powered agents capable of dynamic routing and adaptive behavior

  • Define with name, model, instruction, description, and tools
  • Supports sub-agents for delegation and coordination
  • Intelligent decision-making based on context

Workflow Agents: Structured, predictable orchestration patterns

  • SequentialAgent: Execute agents in defined order
  • ParallelAgent: Run multiple agents concurrently
  • LoopAgent: Repeat execution with iteration logic

BaseAgent: Foundation for custom agent implementations

Key Components

Tools Ecosystem:

  • Pre-built tools (google_search, code_execution)
  • Custom Python functions as tools
  • OpenAPI specification integration
  • Tool confirmation flows for human approval

Multi-Agent Architecture:

  • Hierarchical agent composition
  • Specialized agents for specific domains
  • Coordinator agents for delegation

Installation

# Stable release (recommended)
pip install google-adk

# Development version (latest features)
pip install git+https://github.com/google/adk-python.git@main

Implementation Patterns

Single Agent with Tools

from google.adk.agents import LlmAgent
from google.adk.tools import google_search

agent = LlmAgent(
    name="search_assistant",
    model="gemini-2.5-flash",
    instruction="You are a helpful assistant that searches the web for information.",
    description="Search assistant for web queries",
    tools=[google_search]
)

Multi-Agent System

from google.adk.agents import LlmAgent

# Specialized agents
researcher = LlmAgent(
    name="Researcher",
    model="gemini-2.5-flash",
    instruction="Research topics thoroughly using web search.",
    tools=[google_search]
)

writer = LlmAgent(
    name="Writer",
    model="gemini-2.5-flash",
    instruction="Write clear, engaging content based on research.",
)

# Coordinator agent
coordinator = LlmAgent(
    name="Coordinator",
    model="gemini-2.5-flash",
    instruction="Delegate tasks to researcher and writer agents.",
    sub_agents=[researcher, writer]
)

Custom Tool Creation

from google.adk.tools import Tool

def calculate_sum(a: int, b: int) -> int:
    """Calculate the sum of two numbers."""
    return a + b

# Convert function to tool
sum_tool = Tool.from_function(calculate_sum)

agent = LlmAgent(
    name="calculator",
    model="gemini-2.5-flash",
    tools=[sum_tool]
)

Sequential Workflow

from google.adk.agents import SequentialAgent

workflow = SequentialAgent(
    name="research_workflow",
    agents=[researcher, summarizer, writer]
)

Parallel Workflow

from google.adk.agents import ParallelAgent

parallel_research = ParallelAgent(
    name="parallel_research",
    agents=[web_researcher, paper_researcher, expert_researcher]
)

Human-in-the-Loop

from google.adk.tools import google_search

# Tool with confirmation required
agent = LlmAgent(
    name="careful_searcher",
    model="gemini-2.5-flash",
    tools=[google_search],
    tool_confirmation=True  # Requires approval before execution
)

Deployment Options

Cloud Run Deployment

# Containerize agent
docker build -t my-agent .

# Deploy to Cloud Run
gcloud run deploy my-agent --image my-agent

Vertex AI Agent Engine

# Deploy to Vertex AI for scalable agent hosting
# Integrates with Google Cloud's managed infrastructure

Custom Infrastructure

# Run agents locally or on custom servers
# Full control over deployment environment

Model Support

Optimized for Gemini:

  • gemini-2.5-flash
  • gemini-2.5-pro
  • gemini-1.5-flash
  • gemini-1.5-pro

Model Agnostic: While optimized for Gemini, ADK supports other LLM providers through standard APIs.

Best Practices

  1. Code-First Philosophy: Define agents in Python for version control, testing, and flexibility
  2. Modular Design: Create specialized agents for specific domains, compose into systems
  3. Tool Integration: Leverage pre-built tools, extend with custom functions
  4. Evaluation: Test agents systematically against test cases
  5. Safety: Implement confirmation flows for sensitive operations
  6. Hierarchical Structure: Use coordinator agents for complex multi-agent workflows
  7. Workflow Selection: Choose workflow agents for predictable pipelines, LLM agents for dynamic routing

Common Use Cases

  • Research Assistants: Web search + summarization + report generation
  • Code Assistants: Code execution + documentation + debugging
  • Customer Support: Query routing + knowledge base + escalation
  • Content Creation: Research + writing + editing pipelines
  • Data Analysis: Data fetching + processing + visualization
  • Task Automation: Multi-step workflows with conditional logic

Development UI

ADK includes built-in interface for:

  • Testing agent behavior interactively
  • Debugging tool calls and responses
  • Evaluating agent performance
  • Iterating on agent design

Resources

Implementation Workflow

When implementing ADK-based agents:

  1. Define Requirements: Identify agent capabilities and tools needed
  2. Choose Architecture: Single agent, multi-agent, or workflow-based
  3. Select Tools: Pre-built, custom functions, or OpenAPI integrations
  4. Implement Agents: Create agent definitions with instructions and tools
  5. Test Locally: Use development UI for iteration
  6. Add Evaluation: Create test cases for systematic validation
  7. Deploy: Choose Cloud Run, Vertex AI, or custom infrastructure
  8. Monitor: Track agent performance and iterate

Remember: ADK treats agent development like traditional software engineering - use version control, write tests, and follow engineering best practices.

FAQ

What does the google-adk-python skill do?

Google Agent Development Kit (ADK) for Python. Capabilities: AI agent building, multi-agent systems, workflow agents (sequential/parallel/loop), tool integration (Google Search, Code Execution), Vertex AI deployment, agent evaluation, human-in-the-loop flows. Actions: build, create, deploy, evaluate, orchestrate AI agents. Keywords: Google ADK, Agent Development Kit, AI agent, multi-agent system, LlmAgent, SequentialAgent, ParallelAgent, LoopAgent, tool integration, Google Search, Code Execution, Vertex AI, Cloud Run, agent evaluation, human-in-the-loop, agent orchestration, workflow agent, hierarchical coordination. Use when: building AI agents, creating multi-agent systems, implementing workflow pipelines, integrating LLM agents with tools, deploying to Vertex AI, evaluating agent performance, implementing approval flows.

How do I install google-adk-python?

Run npx skills add https://github.com/samhvw8/dot-claude --skill google-adk-python in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/google-adk-python/ (personal) or .claude/skills/google-adk-python/ (project).

Which AI agents can use google-adk-python?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is google-adk-python safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains google-adk-python?

It is published by samhvw8 in samhvw8/dot-claude. It has 83 recorded installs.

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