feat: sync deployed v1.0.0-rc.38-custom.67

pkg/model_fingerprint/response.go

@@ -76,6 +76,8 @@ func ReadResponse(reader io.Reader, contentType string) (ProbeResponse, error) {
 	scanner := bufio.NewScanner(buffered)
 	scanner.Buffer(make([]byte, 4096), 2<<20)
 	var data strings.Builder
+	var deltas strings.Builder
+	refused := false
 	for scanner.Scan() {
 		line := scanner.Text()
 		if strings.HasPrefix(line, "data:") {
@@ -101,6 +103,15 @@ func ReadResponse(reader io.Reader, contentType string) (ProbeResponse, error) {
 		}
 		event := gjson.Parse(payload)
 		typ := event.Get("type").String()
+		if typ == "response.output_text.delta" {
+			deltas.WriteString(event.Get("delta").String())
+			if deltas.Len() > 65536 {
+				return ProbeResponse{}, ErrInvalidSample
+			}
+		}
+		if typ == "response.refusal.delta" || typ == "response.refusal.done" {
+			refused = true
+		}
 		if typ == "response.output_item.added" || typ == "response.output_item.done" {
 			itemType := event.Get("item.type").String()
 			if itemType != "message" && itemType != "reasoning" {
@@ -108,7 +119,16 @@ func ReadResponse(reader io.Reader, contentType string) (ProbeResponse, error) {
 			}
 		}
 		if typ == "response.completed" {
-			return completedResponse(event.Get("response"))
+			response := event.Get("response")
+			answer, err := completedResponse(response)
+			if refused {
+				return answer, ErrInvalidSample
+			}
+			// Meow 4.5.4 accepts deltas only when completion omits output entirely.
+			if err == nil && !response.Get("output").Exists() {
+				answer.Text = deltas.String()
+			}
+			return answer, err
 		}
 		if typ == "response.failed" || typ == "response.incomplete" {
 			return completedResponse(event.Get("response"))