diff --git a/src/chat/replyer/maisaka_expression_selector.py b/src/chat/replyer/maisaka_expression_selector.py
index d46ea9c9..ca6bf125 100644
--- a/src/chat/replyer/maisaka_expression_selector.py
+++ b/src/chat/replyer/maisaka_expression_selector.py
@@ -240,7 +240,7 @@ class MaisakaExpressionSelector:
             if candidate.get("id") in selected_ids
         ]
         self._update_last_active_time(selected_ids)
-        logger.info(
+        logger.debug(
             f"表达方式直接注入：session_id={session_id} 已选数={len(selected_ids)} "
             f"selected_ids={selected_ids!r} 已选预览={self._format_candidate_preview(selected_expressions)}"
         )
diff --git a/src/llm_models/utils_model.py b/src/llm_models/utils_model.py
index cb381c82..922d049d 100644
--- a/src/llm_models/utils_model.py
+++ b/src/llm_models/utils_model.py
@@ -939,7 +939,7 @@ class LLMOrchestrator:
                     audio_base64=audio_base64,
                 )
                 if self.request_type.startswith("maisaka_"):
-                    logger.info(
+                    logger.debug(
                         f"LLMOrchestrator[{self.request_type}] 正在向模型 model={model_info.name} 发送请求 "
                         f"(tool_options={len(tool_options or [])})"
                     )
@@ -949,7 +949,7 @@ class LLMOrchestrator:
                     request=request,
                 )
                 if self.request_type.startswith("maisaka_"):
-                    logger.info(
+                    logger.debug(
                         f"LLMOrchestrator[{self.request_type}] 模型 model={model_info.name} 已返回 API 响应"
                     )
                 total_tokens, penalty, usage_penalty = self.model_usage[model_info.name]
@@ -962,7 +962,7 @@ class LLMOrchestrator:
                 total_tokens, penalty, usage_penalty = self.model_usage[model_info.name]
                 self.model_usage[model_info.name] = (total_tokens, penalty, usage_penalty - 1)
                 if self.request_type.startswith("maisaka_"):
-                    logger.info(
+                    logger.debug(
                         f"LLMOrchestrator[{self.request_type}] 模型 model={model_info.name} 的请求已被外部信号中断"
                     )
                 raise e
diff --git a/src/maisaka/runtime.py b/src/maisaka/runtime.py
index dac80958..a3db92bf 100644
--- a/src/maisaka/runtime.py
+++ b/src/maisaka/runtime.py
@@ -429,7 +429,7 @@ class MaisakaHeartFlowChatting:
         self._reply_latency_measurement_started_at = None
         self._recent_reply_latencies.append((time.time(), reply_duration))
         self._prune_recent_reply_latencies()
-        logger.info(
+        logger.debug(
             f"{self.log_prefix} 已记录消息回复时长: {reply_duration:.2f} 秒 "
             f"最近10分钟样本数={len(self._recent_reply_latencies)}"
         )
@@ -943,7 +943,7 @@ class MaisakaHeartFlowChatting:
             if self._pending_wait_tool_call_id != tool_call_id:
                 return
 
-            logger.info(f"{self.log_prefix} Maisaka 等待已超时")
+            logger.debug(f"{self.log_prefix} Maisaka 等待已超时")
             self._agent_state = self._STATE_RUNNING
             await self._internal_turn_queue.put("timeout")
         except asyncio.CancelledError:
@@ -1645,7 +1645,7 @@ class MaisakaHeartFlowChatting:
         return panels
 
     def _log_cycle_started(self, cycle_detail: CycleDetail, round_index: int) -> None:
-        logger.info(
+        logger.debug(
             f"{self.log_prefix} MaiSaka 轮次开始: 循环编号={cycle_detail.cycle_id} "
             f"回合={round_index + 1}/{self._max_internal_rounds} "
             f"上下文消息数={len(self._chat_history)}"
@@ -1653,14 +1653,14 @@ class MaisakaHeartFlowChatting:
 
     def _log_cycle_completed(self, cycle_detail: CycleDetail, timer_strings: list[str]) -> None:
         end_time = cycle_detail.end_time if cycle_detail.end_time is not None else cycle_detail.start_time
-        logger.info(
+        logger.debug(
             f"{self.log_prefix} MaiSaka 轮次结束: 循环编号={cycle_detail.cycle_id} "
             f"总耗时={end_time - cycle_detail.start_time:.2f} 秒; "
             f"阶段耗时={', '.join(timer_strings) if timer_strings else '无'}"
         )
 
     def _log_history_trimmed(self, removed_count: int, user_message_count: int) -> None:
-        logger.info(
+        logger.debug(
             f"{self.log_prefix} 已裁剪 {removed_count} 条历史消息; "
             # f"剩余计入上下文的消息数={user_message_count}"
         )