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Stream model responses (#1810)

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Stream models thoughts and responses instead of waiting for the whole
thing to come through. Very rough right now, but I'm making the risk call to push through.
This commit is contained in:
easong-openai
2025-08-04 21:23:22 -07:00
committed by GitHub
parent 063083af15
commit 906d449760
17 changed files with 1616 additions and 234 deletions
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18
codex-rs/core/src/chat_completions.rs
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@@ -260,6 +260,11 @@ async fn process_chat_sse<S>(
.and_then(|d| d.get("content"))
.and_then(|c| c.as_str())
{
// Emit a delta so downstream consumers can stream text live.
let _ = tx_event
.send(Ok(ResponseEvent::OutputTextDelta(content.to_string())))
.await;
let item = ResponseItem::Message {
role: "assistant".to_string(),
content: vec![ContentItem::OutputText {
@@ -439,11 +444,14 @@ where
// will never appear in a Chat Completions stream.
continue;
}
Poll::Ready(Some(Ok(ResponseEvent::OutputTextDelta(_))))
| Poll::Ready(Some(Ok(ResponseEvent::ReasoningSummaryDelta(_)))) => {
// Deltas are ignored here since aggregation waits for the
// final OutputItemDone.
continue;
Poll::Ready(Some(Ok(ResponseEvent::OutputTextDelta(delta)))) => {
// Forward deltas unchanged so callers can stream text
// live while still receiving a single aggregated
// OutputItemDone at the end of the turn.
return Poll::Ready(Some(Ok(ResponseEvent::OutputTextDelta(delta))));
}
Poll::Ready(Some(Ok(ResponseEvent::ReasoningSummaryDelta(delta)))) => {
return Poll::Ready(Some(Ok(ResponseEvent::ReasoningSummaryDelta(delta))));
}
}
}