tighten ai_auto_response participation and spam guard

plugins/ai_auto_response/main.py

@@ -130,6 +130,7 @@ class AIAutoResponsePlugin(MessagePluginInterface):
         self.cooldown_config = self._config.get("cooldown", {}) or {}
         self.cooldown = CooldownManager(self.cooldown_config)
         self.image_config = self._config.get("image", {}) or {}
+        self.spam_config = self._config.get("spam_guard", {}) or {}
         self._synced_member_context_versions: Dict[str, str] = {}
         self.log_debug = bool((self._config.get("logging", {}) or {}).get("debug", True))
         self.LOG.debug(f"[{self.name}] 初始化完成")
@@ -197,6 +198,23 @@ class AIAutoResponsePlugin(MessagePluginInterface):
                     reply_mode="defense",
                 )
                 return False, "ignored_prompt_attack"
+            if self.dedup.should_skip_repeated_room_content(
+                room_id=room_id,
+                content=content,
+                window_sec=int(self.spam_config.get("repeat_window_sec", 45) or 45),
+                repeat_threshold=int(self.spam_config.get("repeat_threshold", 3) or 3),
+                min_length=int(self.spam_config.get("repeat_min_length", 4) or 4),
+            ):
+                self._log_event(
+                    "skip",
+                    room_id=room_id,
+                    sender=sender,
+                    reason="repeated_room_content",
+                    trigger_type="spam_guard",
+                    reply_mode="guard",
+                    topic="-",
+                )
+                return False, "repeated_room_content"
             coding_work_request = is_coding_work_request(content)
             if coding_work_request and not is_at:
                 return False, "skip_coding_work"