Beta Managed Agents Delta Event

• BetaManagedAgentsDeltaEvent object

  An incremental update to an event that is still being streamed. Deltas are best-effort and may stop early; when the buffered event with id == event_id is produced it carries the complete content. A model request that ends early (an error or interrupt) produces no buffered event — its terminal span.model_request_end closes the preview. Only sent on stream connections that opt in via event_deltas; never appears in event history.

  • type: "event_delta"

  • delta: BetaManagedAgentsDeltaContent

    One fragment of the previewed event. The delta type is named for the previewed event's field it streams into: agent.message events stream content_delta fragments, each a partial element of the content array.

    • type: "content_delta"

    • content: BetaManagedAgentsTextBlock

      Regular text content.

      • type: "text"

      • text: string

        The text content.

        minLength: 1

    • index: optional number

      Which entry in the previewed event's content array this fragment lands in. Insert content as that entry when the index is new; append to the existing entry otherwise.

      format: uint32

  • event_id: string

    The id of the event being previewed. Matches event.id on the corresponding event_start and the buffered event that reconciles the preview.