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+# Agent Development Kit (ADK) 2.0
+
+[](LICENSE)
+[](https://pypi.org/project/google-adk/)
+[](https://pypi.org/project/google-adk/)
+[](https://pepy.tech/project/google-adk)
+[](https://github.com/google/adk-python/actions/workflows/python-unit-tests.yml)
+[](https://google.github.io/adk-docs/)
+
+
+ 
+
+
+ An open-source, code-first Python framework for building, evaluating, and deploying sophisticated AI agents with flexibility and control.
+
+
+
+______________________________________________________________________
+
+> **⚠️ BREAKING CHANGES FROM 1.x**
+>
+> This release includes breaking changes to the agent API, event model, and
+> session schema. **Sessions generated by ADK 2.0 are readable by ADK 1.28+
+> (extra fields will be ignored), but are incompatible with older 1.x versions.**
+
+______________________________________________________________________
+
+## 🔥 What's New in 2.0
+
+- **Workflow Runtime**: A graph-based execution engine for composing
+ deterministic execution flows for agentic apps, with support for routing,
+ fan-out/fan-in, loops, retry, state management, dynamic nodes,
+ human-in-the-loop, and nested workflows.
+
+- **Task API**: Structured agent-to-agent delegation with multi-turn task
+ mode, single-turn controlled output, mixed delegation patterns,
+ human-in-the-loop, and task agents as workflow nodes.
+
+## 🚀 Installation
+
+```bash
+pip install google-adk
+```
+
+**Requirements:** Python 3.10+.
+
+To install optional integrations, you can use the following command:
+
+```bash
+pip install "google-adk[extensions]"
+```
+
+The release cadence is roughly bi-weekly.
+
+## Quick Start
+
+> **Beginner Note:** ADK applications are built using two main classes:
+> **`Agent`** (defines an AI's instructions, tools, and behavior) and
+> **`Workflow`** (orchestrates agents and tasks in a graph-based flow).
+
+### Agent
+
+```python
+from google.adk import Agent
+
+root_agent = Agent(
+ name="greeting_agent",
+ model="gemini-2.5-flash",
+ instruction="You are a helpful assistant. Greet the user warmly.",
+)
+```
+
+### Workflow
+
+```python
+from google.adk import Agent, Workflow
+
+generate_fruit_agent = Agent(
+ name="generate_fruit_agent",
+ instruction="Return the name of a random fruit. Return only the name.",
+)
+
+generate_benefit_agent = Agent(
+ name="generate_benefit_agent",
+ instruction="Tell me a health benefit about the specified fruit.",
+)
+
+root_agent = Workflow(
+ name="root_agent",
+ edges=[("START", generate_fruit_agent, generate_benefit_agent)],
+)
+```
+
+### Run Locally
+
+```bash
+# Interactive CLI
+adk run path/to/my_agent
+
+# Web UI (supports multi-agent directories or pointing directly to a single agent folder)
+adk web path/to/agents_dir
+```
+
+## 📚 Documentation
+
+- **Getting Started**: https://google.github.io/adk-docs/
+- **Samples**: See `contributing/workflow_samples/` and
+ `contributing/task_samples/` for workflow and task API examples.
+
+## 🤝 Contributing
+
+See [CONTRIBUTING.md](CONTRIBUTING.md) for details.
+
+## 📄 License
+
+This project is licensed under the Apache 2.0 License — see the
+[LICENSE](LICENSE) file for details.