diff --git a/apps/api/src/services/telegram_gateway.py b/apps/api/src/services/telegram_gateway.py
index 036f1a59..abc531a2 100644
--- a/apps/api/src/services/telegram_gateway.py
+++ b/apps/api/src/services/telegram_gateway.py
@@ -3066,7 +3066,8 @@ class TelegramGateway:
         is_sre_group = str(chat_id) == str(settings.SRE_GROUP_CHAT_ID)
 
         if is_group and is_sre_group:
-            await self._handle_group_message(text, user_id, username, chat_id, message_id)
+            reply_to_message = message.get("reply_to_message")
+            await self._handle_group_message(text, user_id, username, chat_id, message_id, reply_to_message)
             return
 
         # 2. 個人 chat 安全檢查 (ADR-012)
@@ -3109,14 +3110,17 @@ class TelegramGateway:
         username: str,
         chat_id: int,  # noqa: ARG002
         message_id: int | None,
+        reply_to_message: dict | None = None,
     ) -> None:
         """
         處理 SRE 群組訊息 (2026-04-03 ogt: Phase 22.6 Triumvirate)
 
         路由規則:
-          @OpenClawAwoooI_Bot <msg>  → 只有 OpenClaw 回應
-          @NemoTronAwoooI_Bot <msg>  → 只有 NemoClaw 回應
-          其他訊息                   → 兩個 AI 並行回應，互相看到後可評論
+          Reply OpenClaw 訊息         → 只有 OpenClaw 回應
+          Reply NemoClaw 訊息         → 只有 NemoClaw 回應
+          @OpenClawAwoooI_Bot <msg>   → 只有 OpenClaw 回應
+          @NemoTronAwoooI_Bot <msg>   → 只有 NemoClaw 回應
+          其他訊息                    → 兩個 AI 並行回應
         """
         from src.services.chat_manager import get_chat_manager as _get_cm
         chat_mgr = _get_cm()
@@ -3124,9 +3128,26 @@ class TelegramGateway:
         # 全形/半形統一化後比較
         import unicodedata
         text_normalized = unicodedata.normalize("NFKC", text).lower()
-        # 別名: 小O / 小o (含全形Ｏ) → OpenClaw; 小賀 / 小贺 → NemoClaw
-        mention_openclaw = "@openclawawoooi_bot" in text_normalized or "小o" in text_normalized
-        mention_nemo = "@nemotronawoooi_bot" in text_normalized or "小賀" in text_normalized or "小贺" in text_normalized
+
+        # Reply 路由: 若 Reply 的是 Bot 訊息，直接認定目標 AI (2026-04-03 ogt)
+        if reply_to_message:
+            replied_from = reply_to_message.get("from", {})
+            if replied_from.get("is_bot"):
+                replied_username = (replied_from.get("username") or "").lower()
+                if "openclawawoooi" in replied_username:
+                    mention_openclaw, mention_nemo = True, False
+                elif "nemotronawoooi" in replied_username:
+                    mention_openclaw, mention_nemo = False, True
+                else:
+                    mention_openclaw = "@openclawawoooi_bot" in text_normalized or "小o" in text_normalized
+                    mention_nemo = "@nemotronawoooi_bot" in text_normalized or "小賀" in text_normalized or "小贺" in text_normalized
+            else:
+                mention_openclaw = "@openclawawoooi_bot" in text_normalized or "小o" in text_normalized
+                mention_nemo = "@nemotronawoooi_bot" in text_normalized or "小賀" in text_normalized or "小贺" in text_normalized
+        else:
+            # 別名: 小O / 小o (含全形Ｏ) → OpenClaw; 小賀 / 小贺 → NemoClaw
+            mention_openclaw = "@openclawawoooi_bot" in text_normalized or "小o" in text_normalized
+            mention_nemo = "@nemotronawoooi_bot" in text_normalized or "小賀" in text_normalized or "小贺" in text_normalized
 
         # 去掉 @ mention 與別名，取出純訊息
         clean_text = unicodedata.normalize("NFKC", text)