Parse response streams by `data.type`.

Wire format

There are no event: lines. Every frame arrives as a default SSE message, and the event name is the type field inside the JSON payload.

data: {"type":"response.created","sequence_number":0,"response":{"id":"resp_...","status":"in_progress","metadata":{"session_id":"hsess..."}}}

Important events

response.created

Save response.id and response.metadata.session_id immediately.

response.output_text.delta

Append visible answer text.

response.output_item.added

Show sanitized tool or activity progress.

response.completed

Finalize successful UI state.

response.incomplete

Show partial result and offer Continue when appropriate.

response.failed

Show the classified failure or cancellation state.