Module a2a 

Agent2Agent (A2A) Protocol support for VT Code

This module implements the A2A Protocol, an open standard enabling communication and interoperability between AI agents.

Features

• Agent Discovery: Via Agent Cards at /.well-known/agent-card.json
• Task Lifecycle Management: States like submitted, working, completed
• Real-time Streaming: Via Server-Sent Events (SSE)
• Rich Content Types: Text, file, and structured data parts

Usage

use vtcode_core::a2a::{AgentCard, TaskManager, Message, Part};

// Create an agent card
let card = AgentCard::new("vtcode-agent", "VT Code AI Agent", "1.0.0");

// Create a task manager
let manager = TaskManager::new();
let task = manager.create_task(None).await;

Re-exports

pub use agent_card::AgentCapabilities;

pub use agent_card::AgentCard;

pub use agent_card::AgentProvider;

pub use agent_card::AgentSkill;

pub use client::A2aClient;

pub use errors::A2aError;

pub use errors::A2aErrorCode;

pub use errors::A2aResult;

pub use rpc::JsonRpcError;

pub use rpc::JsonRpcRequest;

pub use rpc::JsonRpcResponse;

pub use rpc::SendStreamingMessageResponse;

pub use rpc::StreamingEvent;

pub use rpc::TaskPushNotificationConfig;

pub use task_manager::TaskManager;

pub use types::Artifact;

pub use types::FileContent;

pub use types::Message;

pub use types::MessageRole;

pub use types::Part;

pub use types::Task;

pub use types::TaskState;

pub use types::TaskStatus;

pub use webhook::WebhookError;

pub use webhook::WebhookNotifier;

Modules

agent_card

Agent Card for A2A Protocol

cli

A2A Protocol CLI commands

client

A2A client for interacting with remote A2A agents. Provides helper methods for discovery, task operations, and streaming.

errors

A2A Protocol error types and error codes

rpc

JSON-RPC 2.0 structures for A2A Protocol

server

A2A HTTP Server using axum

task_manager

A2A Task Manager

types

A2A Protocol core data types

webhook

Webhook delivery for A2A push notifications