# `Codex.Events.ReasoningSummaryPartAdded`
[🔗](https://github.com/nshkrdotcom/codex_sdk/blob/v0.16.1/lib/codex/events.ex#L287)

Event emitted when a new reasoning summary part is added.

# `t`

```elixir
@type t() :: %Codex.Events.ReasoningSummaryPartAdded{
  item_id: String.t(),
  summary_index: integer(),
  thread_id: String.t() | nil,
  turn_id: String.t() | nil
}
```

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*Consult [api-reference.md](api-reference.md) for complete listing*