diff --git a/astrbot/core/config/default.py b/astrbot/core/config/default.py
index 0f43dbd06d..bd1eab1855 100644
--- a/astrbot/core/config/default.py
+++ b/astrbot/core/config/default.py
@@ -423,6 +423,7 @@ class ChatProviderTemplate(TypedDict):
                         "webhook_uuid": "",
                         "lark_encrypt_key": "",
                         "lark_verification_token": "",
+                        "lark_auto_thread": False,
                     },
                     "钉钉(DingTalk)": {
                         "id": "dingtalk",
@@ -545,6 +546,11 @@ class ChatProviderTemplate(TypedDict):
                         "options": ["socket", "webhook"],
                         "labels": ["长连接模式", "推送至服务器模式"],
                     },
+                    "lark_auto_thread": {
+                        "description": "自动创建话题",
+                        "type": "bool",
+                        "hint": "开启后，机器人回复消息时会自动创建话题（Thread），每条对话的上下文独立隔离。仅对飞书平台生效。",
+                    },
                     "lark_encrypt_key": {
                         "description": "Encrypt Key",
                         "type": "string",
diff --git a/astrbot/core/platform/sources/lark/lark_adapter.py b/astrbot/core/platform/sources/lark/lark_adapter.py
index 60e8e0d931..7c426a9a26 100644
--- a/astrbot/core/platform/sources/lark/lark_adapter.py
+++ b/astrbot/core/platform/sources/lark/lark_adapter.py
@@ -33,6 +33,14 @@
 from .server import LarkWebhookServer
 
 
+def _strip_session_suffix(session_id: str) -> str:
+    """从 session_id 中提取真实的会话 ID，去除 %thread% / %root% 后缀。"""
+    for _suffix in ("%thread%", "%root%"):
+        if _suffix in session_id:
+            return session_id.split(_suffix)[0]
+    return session_id
+
+
 @register_platform_adapter(
     "lark", "飞书机器人官方 API 适配器", support_streaming_message=True
 )
@@ -469,12 +477,10 @@ async def send_by_session(
     ) -> None:
         if session.message_type == MessageType.GROUP_MESSAGE:
             id_type = "chat_id"
-            receive_id = session.session_id
-            if "%" in receive_id:
-                receive_id = receive_id.split("%")[1]
+            receive_id = _strip_session_suffix(session.session_id)
         else:
             id_type = "open_id"
-            receive_id = session.session_id
+            receive_id = _strip_session_suffix(session.session_id)
 
         # 复用 LarkMessageEvent 中的通用发送逻辑
         await LarkMessageEvent.send_message_chain(
@@ -580,20 +586,45 @@ async def convert_msg(self, event: lark.im.v1.P2ImMessageReceiveV1) -> None:
             user_id=event.event.sender.sender_id.open_id,
             nickname=event.event.sender.sender_id.open_id[:8],
         )
+        # 构建 session_id：按话题/回复链隔离上下文
         if abm.type == MessageType.GROUP_MESSAGE:
-            abm.session_id = abm.group_id
+            base_id = abm.group_id or ""
+            if message.thread_id:
+                # 话题群中的消息，按 thread_id 隔离
+                abm.session_id = f"{base_id}%thread%{message.thread_id}"
+            elif message.root_id:
+                # 群聊中的回复链，按 root_id 隔离
+                abm.session_id = f"{base_id}%root%{message.root_id}"
+            else:
+                abm.session_id = base_id
         else:
-            abm.session_id = abm.sender.user_id
-
-        await self.handle_msg(abm)
-
-    async def handle_msg(self, abm: AstrBotMessage) -> None:
+            base_id = abm.sender.user_id
+            if message.thread_id:
+                abm.session_id = f"{base_id}%thread%{message.thread_id}"
+            elif message.root_id:
+                # 单聊中的回复链，按 root_id 隔离
+                abm.session_id = f"{base_id}%root%{message.root_id}"
+            else:
+                abm.session_id = base_id
+
+        # 判断是否需要通过 reply_in_thread 创建新话题
+        # 读取配置开关，默认关闭
+        auto_thread = self.config.get("lark_auto_thread", False)
+        # 没有已存在的 thread_id 且开关开启时，需要 reply_in_thread=True 创建话题
+        # 已在话题中的消息回复自然在话题内，无需 reply_in_thread
+        _should_reply_in_thread = auto_thread and not bool(message.thread_id)
+        await self.handle_msg(abm, should_reply_in_thread=_should_reply_in_thread)
+
+    async def handle_msg(
+        self, abm: AstrBotMessage, should_reply_in_thread: bool = False
+    ) -> None:
         event = LarkMessageEvent(
             message_str=abm.message_str,
             message_obj=abm,
             platform_meta=self.meta(),
             session_id=abm.session_id,
             bot=self.lark_api,
+            should_reply_in_thread=should_reply_in_thread,
         )
 
         self._event_queue.put_nowait(event)
diff --git a/astrbot/core/platform/sources/lark/lark_event.py b/astrbot/core/platform/sources/lark/lark_event.py
index 1c7dd0b432..a50f35428f 100644
--- a/astrbot/core/platform/sources/lark/lark_event.py
+++ b/astrbot/core/platform/sources/lark/lark_event.py
@@ -48,9 +48,11 @@ def __init__(
         platform_meta,
         session_id,
         bot: lark.Client,
+        should_reply_in_thread: bool = False,
     ) -> None:
         super().__init__(message_str, message_obj, platform_meta, session_id)
         self.bot = bot
+        self.should_reply_in_thread = should_reply_in_thread
 
     @staticmethod
     async def _send_im_message(
@@ -61,6 +63,7 @@ async def _send_im_message(
         reply_message_id: str | None = None,
         receive_id: str | None = None,
         receive_id_type: str | None = None,
+        reply_in_thread: bool = False,
     ) -> bool:
         """发送飞书 IM 消息的通用辅助函数
 
@@ -71,6 +74,7 @@ async def _send_im_message(
             reply_message_id: 回复的消息ID（用于回复消息）
             receive_id: 接收者ID（用于主动发送）
             receive_id_type: 接收者ID类型（用于主动发送）
+            reply_in_thread: 是否在话题中回复
 
         Returns:
             是否发送成功
@@ -88,7 +92,7 @@ async def _send_im_message(
                     .content(content)
                     .msg_type(msg_type)
                     .uuid(str(uuid.uuid4()))
-                    .reply_in_thread(False)
+                    .reply_in_thread(reply_in_thread)
                     .build()
                 )
                 .build()
@@ -367,6 +371,7 @@ async def _send_interactive_card(
         reply_message_id: str | None = None,
         receive_id: str | None = None,
         receive_id_type: str | None = None,
+        reply_in_thread: bool = False,
     ) -> bool:
         if lark_client.cardkit is None:
             logger.error("[Lark] API Client cardkit 模块未初始化，无法发送卡片")
@@ -405,6 +410,7 @@ async def _send_interactive_card(
             reply_message_id=reply_message_id,
             receive_id=receive_id,
             receive_id_type=receive_id_type,
+            reply_in_thread=reply_in_thread,
         )
 
     @staticmethod
@@ -415,6 +421,7 @@ async def _send_collapsible_reasoning_panel(
         reply_message_id: str | None = None,
         receive_id: str | None = None,
         receive_id_type: str | None = None,
+        reply_in_thread: bool = False,
     ) -> bool:
         if not reasoning_content:
             return True
@@ -428,6 +435,7 @@ async def _send_collapsible_reasoning_panel(
             reply_message_id=reply_message_id,
             receive_id=receive_id,
             receive_id_type=receive_id_type,
+            reply_in_thread=reply_in_thread,
         )
 
     @staticmethod
@@ -437,6 +445,7 @@ async def send_message_chain(
         reply_message_id: str | None = None,
         receive_id: str | None = None,
         receive_id_type: str | None = None,
+        reply_in_thread: bool = False,
     ) -> None:
         """通用的消息链发送方法
 
@@ -446,6 +455,7 @@ async def send_message_chain(
             reply_message_id: 回复的消息ID（用于回复消息）
             receive_id: 接收者ID（用于主动发送）
             receive_id_type: 接收者ID类型，如 'open_id', 'chat_id'（用于主动发送）
+            reply_in_thread: 是否在话题中回复
         """
         if lark_client.im is None:
             logger.error("[Lark] API Client im 模块未初始化")
@@ -486,6 +496,7 @@ async def send_message_chain(
                 reply_message_id=reply_message_id,
                 receive_id=receive_id,
                 receive_id_type=receive_id_type,
+                reply_in_thread=reply_in_thread,
             ):
                 return
 
@@ -520,6 +531,7 @@ async def _flush_buffer() -> None:
                         reply_message_id=reply_message_id,
                         receive_id=receive_id,
                         receive_id_type=receive_id_type,
+                        reply_in_thread=reply_in_thread,
                     )
 
             # 维持组件顺序：遇到折叠面板标记先 flush 当前普通内容并发送卡片
@@ -539,6 +551,7 @@ async def _flush_buffer() -> None:
                                 reply_message_id=reply_message_id,
                                 receive_id=receive_id,
                                 receive_id_type=receive_id_type,
+                                reply_in_thread=reply_in_thread,
                             )
                             if not success:
                                 buffered_components.append(
@@ -554,17 +567,32 @@ async def _flush_buffer() -> None:
         # 发送附件
         for file_comp in file_components:
             await LarkMessageEvent._send_file_message(
-                file_comp, lark_client, reply_message_id, receive_id, receive_id_type
+                file_comp,
+                lark_client,
+                reply_message_id,
+                receive_id,
+                receive_id_type,
+                reply_in_thread=reply_in_thread,
             )
 
         for audio_comp in audio_components:
             await LarkMessageEvent._send_audio_message(
-                audio_comp, lark_client, reply_message_id, receive_id, receive_id_type
+                audio_comp,
+                lark_client,
+                reply_message_id,
+                receive_id,
+                receive_id_type,
+                reply_in_thread=reply_in_thread,
             )
 
         for media_comp in media_components:
             await LarkMessageEvent._send_media_message(
-                media_comp, lark_client, reply_message_id, receive_id, receive_id_type
+                media_comp,
+                lark_client,
+                reply_message_id,
+                receive_id,
+                receive_id_type,
+                reply_in_thread=reply_in_thread,
             )
 
     async def send(self, message: MessageChain) -> None:
@@ -573,6 +601,7 @@ async def send(self, message: MessageChain) -> None:
             message,
             self.bot,
             reply_message_id=self.message_obj.message_id,
+            reply_in_thread=self.should_reply_in_thread,
         )
         await super().send(message)
 
@@ -583,6 +612,7 @@ async def _send_file_message(
         reply_message_id: str | None = None,
         receive_id: str | None = None,
         receive_id_type: str | None = None,
+        reply_in_thread: bool = False,
     ) -> None:
         """发送文件消息
 
@@ -608,6 +638,7 @@ async def _send_file_message(
             reply_message_id=reply_message_id,
             receive_id=receive_id,
             receive_id_type=receive_id_type,
+            reply_in_thread=reply_in_thread,
         )
 
     @staticmethod
@@ -617,6 +648,7 @@ async def _send_audio_message(
         reply_message_id: str | None = None,
         receive_id: str | None = None,
         receive_id_type: str | None = None,
+        reply_in_thread: bool = False,
     ) -> None:
         """发送音频消息
 
@@ -681,6 +713,7 @@ async def _send_audio_message(
             reply_message_id=reply_message_id,
             receive_id=receive_id,
             receive_id_type=receive_id_type,
+            reply_in_thread=reply_in_thread,
         )
 
     @staticmethod
@@ -690,6 +723,7 @@ async def _send_media_message(
         reply_message_id: str | None = None,
         receive_id: str | None = None,
         receive_id_type: str | None = None,
+        reply_in_thread: bool = False,
     ) -> None:
         """发送视频消息
 
@@ -754,6 +788,7 @@ async def _send_media_message(
             reply_message_id=reply_message_id,
             receive_id=receive_id,
             receive_id_type=receive_id_type,
+            reply_in_thread=reply_in_thread,
         )
 
     async def react(self, emoji: str) -> None:
@@ -845,6 +880,7 @@ async def _send_card_message(
         reply_message_id: str | None = None,
         receive_id: str | None = None,
         receive_id_type: str | None = None,
+        reply_in_thread: bool = False,
     ) -> bool:
         """将卡片实体作为 interactive 消息发送。"""
         content = json.dumps(
@@ -858,6 +894,7 @@ async def _send_card_message(
             reply_message_id=reply_message_id,
             receive_id=receive_id,
             receive_id_type=receive_id_type,
+            reply_in_thread=reply_in_thread,
         )
 
     async def _update_streaming_text(
@@ -960,6 +997,10 @@ async def send_streaming(self, generator, use_fallback: bool = False):
         使用解耦发送循环，LLM token 到达时只更新 buffer 并唤醒发送协程，
         发送频率由网络 RTT 自然限流。
         """
+        # 非话题消息：通过 reply_in_thread=True 创建新话题，同时使用流式卡片
+        if self.should_reply_in_thread:
+            logger.info("[Lark] 非话题消息，将通过 reply_in_thread=True 创建新话题")
+
         # Lazy-init: card & sender loop created on first text token
         card_id = None
         sequence = 0
@@ -1054,6 +1095,7 @@ async def _flush_and_close_card() -> None:
                             sent = await self._send_card_message(
                                 card_id,
                                 reply_message_id=self.message_obj.message_id,
+                                reply_in_thread=self.should_reply_in_thread,
                             )
                             if not sent:
                                 logger.error(
diff --git a/astrbot/core/provider/sources/anthropic_source.py b/astrbot/core/provider/sources/anthropic_source.py
index 203d0610ff..2e63c3c3c5 100644
--- a/astrbot/core/provider/sources/anthropic_source.py
+++ b/astrbot/core/provider/sources/anthropic_source.py
@@ -419,7 +419,7 @@ async def _query_stream(
                         # 解析完整的工具调用
                         tool_info = tool_use_buffer[event.index]
                         try:
-                            if "input_json" in tool_info:
+                            if isinstance(tool_info.get("input_json"), str) and tool_info["input_json"]:
                                 tool_info["input"] = json.loads(tool_info["input_json"])
 
                             # 添加到最终结果
diff --git a/dashboard/src/i18n/locales/en-US/features/config-metadata.json b/dashboard/src/i18n/locales/en-US/features/config-metadata.json
index 43aae5984b..96784192e0 100644
--- a/dashboard/src/i18n/locales/en-US/features/config-metadata.json
+++ b/dashboard/src/i18n/locales/en-US/features/config-metadata.json
@@ -440,6 +440,10 @@
         "description": "Verification Token",
         "hint": "Token for verifying Lark callback requests."
       },
+      "lark_auto_thread": {
+        "description": "Auto-create Thread",
+        "hint": "When enabled, the bot will automatically create a thread for each reply, isolating conversation context per thread."
+      },
       "misskey_allow_insecure_downloads": {
         "description": "Allow Insecure Downloads (Disable SSL Verification)",
         "hint": "If remote servers have certificate issues, SSL verification will be disabled as a fallback. Use only when necessary due to security risks."
diff --git a/dashboard/src/i18n/locales/ru-RU/features/config-metadata.json b/dashboard/src/i18n/locales/ru-RU/features/config-metadata.json
index 06f60dd40a..65cdcfedb5 100644
--- a/dashboard/src/i18n/locales/ru-RU/features/config-metadata.json
+++ b/dashboard/src/i18n/locales/ru-RU/features/config-metadata.json
@@ -440,6 +440,10 @@
                 "description": "Токен верификации",
                 "hint": "Для проверки запросов обратного вызова Lark."
             },
+            "lark_auto_thread": {
+                "description": "Автосоздание темы",
+                "hint": "При включении бот автоматически создаёт тему (Thread) для каждого ответа, изолируя контекст разговора."
+            },
             "misskey_allow_insecure_downloads": {
                 "description": "Разрешить небезопасные загрузки (без SSL)",
                 "hint": "Отключает проверку SSL если у удаленного сервера проблемы с сертификатами. Используйте с осторожностью."
diff --git a/dashboard/src/i18n/locales/zh-CN/features/config-metadata.json b/dashboard/src/i18n/locales/zh-CN/features/config-metadata.json
index 7b59a981d5..cd8d73cdfe 100644
--- a/dashboard/src/i18n/locales/zh-CN/features/config-metadata.json
+++ b/dashboard/src/i18n/locales/zh-CN/features/config-metadata.json
@@ -442,6 +442,10 @@
         "description": "Verification Token",
         "hint": "用于验证飞书回调请求的令牌"
       },
+      "lark_auto_thread": {
+        "description": "自动创建话题",
+        "hint": "开启后，机器人回复消息时会自动创建话题（Thread），每条对话的上下文独立隔离。"
+      },
       "misskey_allow_insecure_downloads": {
         "description": "允许不安全下载（禁用 SSL 验证）",
         "hint": "当远端服务器存在证书问题导致无法正常下载时，自动禁用 SSL 验证作为回退方案。适用于某些图床的证书配置问题。启用有安全风险，仅在必要时使用。"