From ffa172c92d421c8018eeeff57e5523527c0458c4 Mon Sep 17 00:00:00 2001
From: Kwan96 <quanle96@outlook.com>
Date: Tue, 31 Mar 2026 09:21:11 +0700
Subject: [PATCH] fix(claude-to-openai): emit closing </think> tag instead of
 empty reasoning_content (#454)

Replace empty reasoning_content with explicit </think> closing tag when exiting thinking block to properly signal end of reasoning section in streaming responses.
---
 open-sse/translator/response/claude-to-openai.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/open-sse/translator/response/claude-to-openai.js b/open-sse/translator/response/claude-to-openai.js
index 2dfe0db..7e662d3 100644
--- a/open-sse/translator/response/claude-to-openai.js
+++ b/open-sse/translator/response/claude-to-openai.js
@@ -95,7 +95,7 @@ export function claudeToOpenAIResponse(chunk, state) {
         break;
       }
       if (state.inThinkingBlock && chunk.index === state.currentBlockIndex) {
-        results.push(createChunk(state, { reasoning_content: "" }));
+        results.push(createChunk(state, { content: "</think>" }));
         state.inThinkingBlock = false;
       }
       state.textBlockStarted = false;