diff --git a/backend/main.py b/backend/main.py
index 586754b..5418003 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -1458,6 +1458,46 @@ async def _wait_for_agent_loop_ready(
     return False
 
 
+async def _record_agent_loop_ready_warning(
+    bot_id: str,
+    timeout_seconds: float = 12.0,
+    poll_interval_seconds: float = 0.5,
+) -> None:
+    try:
+        agent_loop_ready = await _wait_for_agent_loop_ready(
+            bot_id,
+            timeout_seconds=timeout_seconds,
+            poll_interval_seconds=poll_interval_seconds,
+        )
+        if agent_loop_ready:
+            return
+        if docker_manager.get_bot_status(bot_id) != "RUNNING":
+            return
+        detail = (
+            "Bot container started, but ready marker was not found in logs within "
+            f"{int(timeout_seconds)}s. Check bot logs or MCP config if the bot stays unavailable."
+        )
+        logger.warning("bot_id=%s agent loop ready marker not found within %ss", bot_id, timeout_seconds)
+        with Session(engine) as background_session:
+            if not background_session.get(BotInstance, bot_id):
+                return
+            record_activity_event(
+                background_session,
+                bot_id,
+                "bot_warning",
+                channel="system",
+                detail=detail,
+                metadata={
+                    "kind": "agent_loop_ready_timeout",
+                    "marker": _AGENT_LOOP_READY_MARKER,
+                    "timeout_seconds": timeout_seconds,
+                },
+            )
+            background_session.commit()
+        _invalidate_bot_detail_cache(bot_id)
+    except Exception:
+        logger.exception("Failed to record agent loop readiness warning for bot_id=%s", bot_id)
+
 def _sync_workspace_channels(
     session: Session,
     bot_id: str,
@@ -2668,20 +2708,7 @@ async def start_bot(bot_id: str, session: Session = Depends(get_session)):
             status_code=500,
             detail="Bot container failed shortly after startup. Check bot logs/config.",
         )
-    agent_loop_ready = await _wait_for_agent_loop_ready(bot_id)
-    if not agent_loop_ready:
-        docker_manager.stop_bot(bot_id)
-        bot.docker_status = "STOPPED"
-        if str(bot.current_state or "").upper() not in {"ERROR"}:
-            bot.current_state = "IDLE"
-        bot.updated_at = datetime.utcnow()
-        session.add(bot)
-        session.commit()
-        _invalidate_bot_detail_cache(bot_id)
-        raise HTTPException(
-            status_code=500,
-            detail="Bot启动异常：容器已启动，但 Agent loop 未正常就绪，请检查 Bot 日志或 MCP 配置。",
-        )
+    asyncio.create_task(_record_agent_loop_ready_warning(bot_id))
     session.add(bot)
     record_activity_event(session, bot_id, "bot_started", channel="system", detail=f"Container started for {bot_id}")
     session.commit()
diff --git a/backend/services/platform_service.py b/backend/services/platform_service.py
index 38ed15b..1b28806 100644
--- a/backend/services/platform_service.py
+++ b/backend/services/platform_service.py
@@ -48,6 +48,7 @@ OPERATIONAL_ACTIVITY_EVENT_TYPES = {
     "bot_created",
     "bot_started",
     "bot_stopped",
+    "bot_warning",
     "bot_enabled",
     "bot_disabled",
     "bot_deactivated",