Refactor

open-sse/translator/concerns/reasoning.js

@@ -6,3 +6,19 @@ export function reasoningDelta(text, withRole = false) {
     ? { role: ROLE.ASSISTANT, reasoning_content: text }
     : { reasoning_content: text };
 }
+
+// Extract reasoning text from a streamed OpenAI-compatible delta across vendor shapes:
+//   - reasoning_content (GLM, Qwen, DeepSeek, Kimi, Step, Hunyuan)
+//   - reasoning (some compat layers)
+//   - reasoning_details[] (MiniMax reasoning_split=true): [{ text|content }]
+// Returns concatenated reasoning string, or "" when none.
+export function extractReasoningText(delta) {
+  if (!delta || typeof delta !== "object") return "";
+  if (typeof delta.reasoning_content === "string" && delta.reasoning_content) return delta.reasoning_content;
+  if (typeof delta.reasoning === "string" && delta.reasoning) return delta.reasoning;
+  const details = delta.reasoning_details;
+  if (Array.isArray(details)) {
+    return details.map((d) => (typeof d === "string" ? d : d?.text || d?.content || "")).join("");
+  }
+  return "";
+}