strands.types.a2a

Additional A2A types.

A2AStreamEvent

class A2AStreamEvent(TypedEvent)

Defined in: src/strands/types/a2a.py:12

Event emitted for every update received from the remote A2A server.

This event wraps all A2A response types during streaming, including:

• Partial task updates (TaskArtifactUpdateEvent)
• Status updates (TaskStatusUpdateEvent)
• Complete messages (Message)
• Final task completions

The event is emitted for EVERY update from the server, regardless of whether it represents a complete or partial response. When streaming completes, an AgentResultEvent containing the final AgentResult is also emitted after all A2AStreamEvents.

__init__

def __init__(a2a_event: A2AResponse) -> None

Defined in: src/strands/types/a2a.py:27

Initialize with A2A event.

Arguments:

• a2a_event - The original A2A event (Task tuple or Message)