diff --git a/static/js/markdown.js b/static/js/markdown.js
index f2bb7f85f..0bfee5f41 100644
--- a/static/js/markdown.js
+++ b/static/js/markdown.js
@@ -165,7 +165,7 @@ export function hasUnclosedThinkTag(text) {
 }
 
 export function startsWithReasoningPrefix(text) {
-  return /^\s*(?:thinking(?:\s+process)?\s*:|the user |i need |i should |i will |they are |the question |i can )/i.test(text || '');
+  return /^\s*(?:thinking(?:\s+process)?\s*:|the user |user wants|we need |i need |i should |i will |i'll |i am going |let me (?:think|look|see|check|read|review|analyze|parse|figure|draft|write)|they are |the question |i can )/i.test(text || '');
 }
 
 export function normalizeThinkingMarkup(text) {
@@ -236,6 +236,11 @@ function normalizePlainThinking(text) {
     }
   }
 
+  if (/^\s*(?:thinking(?:\s+process)?\s*:|the user |user wants|we need |let me (?:think|look|see|check|read|review|analyze|parse|figure|draft|write)|i need to |i should |i will |i'll |i am going )/i.test(trimmed)) {
+    const thinkBlock = withoutPrefix.trim();
+    if (thinkBlock) return `<think>${thinkBlock}</think>`;
+  }
+
   return text;
 }