diff --git a/examples/openclaw-plugin/text-utils.ts b/examples/openclaw-plugin/text-utils.ts
index 8e11c6214..5a4ec90fe 100644
--- a/examples/openclaw-plugin/text-utils.ts
+++ b/examples/openclaw-plugin/text-utils.ts
@@ -58,9 +58,10 @@ export function sanitizeUserTextForCapture(text: string): string {
   // 格式: "System: [时间] Compacted ... Context ... [时间] 实际内容"
   if (COMPACTED_SYSTEM_MSG_RE.test(text)) {
     // 提取最后一个 ] 之后的内容（即实际用户输入）
-    const match = text.match(/\]\s*(.+)$/);
-    if (match && match[1]) {
-      return match[1].replace(/\s+/g, " ").trim();
+    const lastBracketIndex = text.lastIndexOf("]");
+    if (lastBracketIndex !== -1) {
+      const content = text.slice(lastBracketIndex + 1);
+      return content.replace(/\s+/g, " ").trim();
     }
     return "";
   }
diff --git a/openviking/session/session.py b/openviking/session/session.py
index 3bcf276b4..b6ec14965 100644
--- a/openviking/session/session.py
+++ b/openviking/session/session.py
@@ -182,24 +182,6 @@ def __init__(
 
         logger.info(f"Session created: {self.session_id} for user {self.user}")
 
-    async def _get_latest_archive_last_msg_time(self) -> Optional[float]:
-        """获取上一次归档的最后一条消息的时间戳（毫秒），用于过滤需要提取记忆的消息。"""
-        # 使用 compression_index - 1 获取上一次归档的索引
-        if self._compression.compression_index <= 1:
-            return None
-        # 获取上一次归档的目录
-        archive_uri = (
-            f"{self._session_uri}/history/archive_{self._compression.compression_index - 1:03d}"
-        )
-        messages = await self._read_archive_messages(archive_uri)
-        if messages and messages[-1].created_at:
-            # 解析 ISO 时间戳为毫秒
-            from dateutil import parser
-
-            dt = parser.parse(messages[-1].created_at)
-            return dt.timestamp() * 1000
-        return None
-
     async def load(self):
         """Load session data from storage."""
         if self._loaded:
@@ -468,11 +450,6 @@ async def commit_async(self) -> Dict[str, Any]:
         await self._save_meta()
 
         self._compression.original_count += len(messages_to_archive)
-        # 从最新归档中获取上一次归档的时间戳（用于过滤需要提取记忆的消息）
-        previous_archive_time = await self._get_latest_archive_last_msg_time()
-        logger.info(
-            f"commit_async: previous_archive_time from archive={previous_archive_time}, compression_index={self._compression.compression_index}"
-        )
         logger.info(
             f"Archived: {len(messages_to_archive)} messages → "
             f"history/archive_{self._compression.compression_index:03d}/"
@@ -490,38 +467,14 @@ async def commit_async(self) -> Dict[str, Any]:
             owner_user_id=self.ctx.user.user_id,
         )
 
-        # 只传递上一次归档之后的新消息给 memory extraction
-        # 使用 previous_archive_time 过滤（在设置新时间之前）
-        messages_for_extraction = messages_to_archive
-        logger.info(
-            f"Memory extraction filter: previous_archive_time={previous_archive_time}, "
-            f"messages_count={len(messages_to_archive)}"
-        )
-        if previous_archive_time:
-            archive_time_str = datetime.fromtimestamp(
-                previous_archive_time / 1000, timezone.utc
-            ).isoformat()
-            # 打印前几条消息的 created_at 用于调试
-            if messages_to_archive:
-                logger.info(
-                    f"Debug: first msg created_at={messages_to_archive[0].created_at}, "
-                    f"archive_time_str={archive_time_str}"
-                )
-            messages_for_extraction = [
-                m for m in messages_to_archive if m.created_at and m.created_at > archive_time_str
-            ]
-            logger.info(
-                f"Memory extraction: {len(messages_to_archive)} total -> {len(messages_for_extraction)} new (after {previous_archive_time})"
-            )
-
         asyncio.create_task(
             self._run_memory_extraction(
                 task_id=task.task_id,
                 archive_uri=archive_uri,
-                messages=messages_for_extraction,
+                messages=messages_to_archive,
                 usage_records=usage_snapshot,
-                first_message_id=messages_for_extraction[0].id if messages_for_extraction else "",
-                last_message_id=messages_for_extraction[-1].id if messages_for_extraction else "",
+                first_message_id=messages_to_archive[0].id if messages_to_archive else "",
+                last_message_id=messages_to_archive[-1].id if messages_to_archive else "",
             )
         )
 
@@ -790,21 +743,6 @@ async def get_session_context(self, token_budget: int = 128_000) -> Dict[str, An
         context = await self._collect_session_context_components()
         merged_messages = context["messages"]
 
-        # 过滤：只返回上一次归档之后的最新消息（从最新归档获取时间戳）
-        previous_time = await self._get_latest_archive_last_msg_time()
-        if previous_time:
-            original_count = len(merged_messages)
-            archive_time_str = datetime.fromtimestamp(
-                previous_time / 1000, timezone.utc
-            ).isoformat()
-            merged_messages = [
-                m for m in merged_messages if m.created_at and m.created_at > archive_time_str
-            ]
-            logger.info(
-                f"[get_session_context] filtered messages: {original_count} -> {len(merged_messages)}, "
-                f"after archive time={previous_time}"
-            )
-
         message_tokens = sum(m.estimated_tokens for m in merged_messages)
 
         # 精简日志：只打印关键信息
@@ -823,7 +761,7 @@ async def get_session_context(self, token_budget: int = 128_000) -> Dict[str, An
         if include_latest_overview:
             remaining_budget -= latest_archive_tokens
 
-        # 不再返回 pre_archive_abstracts（只保留 latest_archive_overview）
+        # pre_archive_abstracts: 保留字段返回空数组，保持 API 向下兼容
         included_pre_archive_abstracts: List[Dict[str, str]] = []
         pre_archive_tokens = 0
 
@@ -837,7 +775,7 @@ async def get_session_context(self, token_budget: int = 128_000) -> Dict[str, An
             "latest_archive_overview": (
                 latest_archive["overview"] if include_latest_overview else ""
             ),
-            # 不再返回 pre_archive_abstracts
+            "pre_archive_abstracts": [],  # 保持 API 向后兼容，返回空数组
             "messages": [m.to_dict() for m in merged_messages],
             "estimatedTokens": message_tokens + archive_tokens,
             "stats": {