diff --git a/apps/api/src/main.py b/apps/api/src/main.py
index 1b9438fb..f2cd5e56 100644
--- a/apps/api/src/main.py
+++ b/apps/api/src/main.py
@@ -230,14 +230,17 @@ async def lifespan(_app: FastAPI) -> AsyncGenerator[None, None]:
     register_all_providers()
     logger.info("mcp_providers_registered")
 
-    # Phase 6.5: Telegram 心跳監控
-    # 2026-04-15 ogt: 停用 — 心跳已轉發到另一個 Telegram 群組，不需在此頻道重複發送
-    # if settings.OPENCLAW_TG_BOT_TOKEN:
-    #     await telegram_gw.start_heartbeat_monitor(
-    #         heartbeat_interval_minutes=30,
-    #         silence_threshold_hours=2,
-    #     )
-    logger.info("telegram_heartbeat_monitor_disabled", reason="forwarded_to_separate_group")
+    # Phase 6.5: Telegram 心跳監控（每 30 分鐘發送到 SRE 戰情室群組）
+    # 2026-04-16 ogt + Claude Sonnet 4.6: 恢復 — 使用者確認必須繼續在 SRE 戰情室發送
+    #   上次停用原因（forwarded_to_separate_group）有誤，群組就是 SRE_GROUP_CHAT_ID
+    if settings.OPENCLAW_TG_BOT_TOKEN:
+        await telegram_gw.start_heartbeat_monitor(
+            heartbeat_interval_minutes=30,
+            silence_threshold_hours=2,
+        )
+        logger.info("telegram_heartbeat_monitor_started", interval_minutes=30)
+    else:
+        logger.warning("telegram_heartbeat_monitor_skipped", reason="OPENCLAW_TG_BOT_TOKEN not set")
 
     # Reboot Recovery: Warm-up Redis Working Memory from PostgreSQL
     # 2026-04-05 ogt: 重開機後 Redis 清空，從 DB restore 未解決的 incidents