Module a2a 

Agent2Agent (A2A) Protocol support for VT Code.

Re-exported from vtcode-a2a for backward compatibility.

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

Structs

A2aClient

HTTP client for interacting with A2A agents

AgentCapabilities

Agent capabilities declaration

AgentCard

Agent Card - metadata describing an A2A agent

AgentProvider

Agent provider/organization details

AgentSkill

A specific capability/skill of an agent

Artifact

A tangible output generated by a task

JsonRpcError

JSON-RPC 2.0 Error

JsonRpcRequest

JSON-RPC 2.0 Request

JsonRpcResponse

JSON-RPC 2.0 Response

Message

A single unit of communication

SendStreamingMessageResponse

Base wrapper for streaming message response

Task

Represents a stateful unit of work

TaskManager

A2A Task Manager - handles task creation, updates, and queries

TaskPushNotificationConfig

Configuration for push notification delivery

TaskStatus

Task status with state, optional message, and timestamp

WebhookNotifier

Webhook notifier for delivering A2A events

Enums

A2aError

A2A protocol error

A2aErrorCode

A2A error code enum for type-safe error handling

FileContent

File content representation

MessageRole

Role of the message sender

Part

Content part types: text, file, or structured data

StreamingEvent

Streaming event types (discriminated by ‘type’ field)

TaskState

Task lifecycle states as defined in the A2A specification

WebhookError

Webhook delivery errors

Functions

shutdown_signal_logged

Wait for a process shutdown signal and log listener errors.

Type Aliases

A2aResult

A2A Result type alias