item: BetaResponseOutputItem

The output item that was added. For reasoning items, encrypted_content may be incomplete while the item is in progress. Use the reasoning item from the corresponding response.output_item.done event when passing it as input to a subsequent request.

output_index: int

The index of the output item that was added.

sequence_number: int

The sequence number of this event.

type: Literal["response.output_item.added"]

The type of the event. Always response.output_item.added.

agent: Optional[Agent]

The agent that owns this multi-agent streaming event.

agent_name: str

The canonical name of the agent that produced this item.