Module types 

A2A Protocol core data types

Implements the core data structures as defined in the A2A specification:

• Task and TaskStatus for task lifecycle management
• Message and Part types for communication
• Artifact for task outputs

Structs

Artifact

A tangible output generated by a task

Message

A single unit of communication

Task

Represents a stateful unit of work

TaskStatus

Task status with state, optional message, and timestamp

Enums

FileContent

File content representation

MessageRole

Role of the message sender

Part

Content part types: text, file, or structured data

TaskState

Task lifecycle states as defined in the A2A specification