Tutorial: Google A2A

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The Google A2A (Agent-to-Agent)^{View Repo} project defines an open protocol enabling different AI agents, possibly built with different technologies, to communicate and work together. Think of it as a common language (A2A Protocol) agents use to discover each other (Agent Card), assign work (Task), and exchange results, even providing real-time updates (Streaming). The project includes sample client and server implementations, example agents using frameworks like LangGraph or CrewAI, and a demo UI showcasing multi-agent interactions.

flowchart TD
    A0["A2A Protocol & Core Types"]
    A1["Task"]
    A2["Agent Card"]
    A3["A2A Server Implementation"]
    A4["A2A Client Implementation"]
    A5["Task Handling Logic (Server-side)"]
    A6["Streaming Communication (SSE)"]
    A7["Demo UI Application & Service"]
    A8["Multi-Agent Orchestration (Host Agent)"]
    A0 -- "Defines Structure For" --> A1
    A0 -- "Defines Structure For" --> A2
    A4 -- "Sends Task Requests To" --> A3
    A3 -- "Delegates Task To" --> A5
    A5 -- "Executes" --> A1
    A8 -- "Uses for Discovery" --> A2
    A3 -- "Sends Updates Via" --> A6
    A4 -- "Receives Updates Via" --> A6
    A8 -- "Acts As" --> A4
    A7 -- "Presents/Manages" --> A8
    A7 -- "Communicates With" --> A5

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Table of contents

• Agent Card
• Task
• A2A Protocol & Core Types
• A2A Server Implementation
• A2A Client Implementation
• Task Handling Logic (Server-side)
• Streaming Communication (SSE)
• Multi-Agent Orchestration (Host Agent)
• Demo UI Application & Service