diff --git a/frontend/src/components/workspace/messages/markdown-content.tsx b/frontend/src/components/workspace/messages/markdown-content.tsx
index 2a184df1..5720b7de 100644
--- a/frontend/src/components/workspace/messages/markdown-content.tsx
+++ b/frontend/src/components/workspace/messages/markdown-content.tsx
@@ -1,6 +1,6 @@
 "use client";
 
-import { CheckIcon, CopyIcon } from "lucide-react";
+import { CheckIcon, CopyIcon, DownloadIcon } from "lucide-react";
 import { useCallback, useMemo, useState, type MouseEvent } from "react";
 import type {
   AnchorHTMLAttributes,
@@ -56,27 +56,57 @@ function toMarkdownTable(data: TableData): string {
   return [headerLine, dividerLine, ...rowLines].join("\n");
 }
 
+function escapeCsvCell(value: string): string {
+  if (!/[",\n\r]/.test(value)) return value;
+  return `"${value.replaceAll('"', '""')}"`;
+}
+
+function toCsvTable(data: TableData): string {
+  if (data.headers.length === 0) return "";
+  return [data.headers, ...data.rows]
+    .map((row) => row.map(escapeCsvCell).join(","))
+    .join("\n");
+}
+
+function downloadCsvFile(content: string, filename: string) {
+  const blob = new Blob(["\uFEFF", content], {
+    type: "text/csv;charset=utf-8",
+  });
+  const url = URL.createObjectURL(blob);
+  const anchor = document.createElement("a");
+  anchor.href = url;
+  anchor.download = filename;
+  anchor.click();
+  URL.revokeObjectURL(url);
+}
+
 function MarkdownTable({
   className,
   children,
-  isLoading,
   copyLabel,
+  downloadLabel,
   ...props
 }: ComponentPropsWithoutRef<"table"> & {
-  isLoading: boolean;
   copyLabel: string;
+  downloadLabel: string;
 }) {
   const [copied, setCopied] = useState(false);
 
+  const getTableData = useCallback((event: MouseEvent<HTMLButtonElement>) => {
+    const wrapper = event.currentTarget.closest(
+      '[data-streamdown="table-wrapper"]',
+    );
+    const table = wrapper?.querySelector("table");
+    if (!(table instanceof HTMLTableElement)) return null;
+    return parseTableData(table);
+  }, []);
+
   const handleCopy = useCallback(
     async (event: MouseEvent<HTMLButtonElement>) => {
-      const wrapper = event.currentTarget.closest(
-        '[data-streamdown="table-wrapper"]',
-      );
-      const table = wrapper?.querySelector("table");
-      if (!(table instanceof HTMLTableElement)) return;
+      const data = getTableData(event);
+      if (!data) return;
 
-      const markdown = toMarkdownTable(parseTableData(table));
+      const markdown = toMarkdownTable(data);
       if (!markdown) return;
 
       try {
@@ -87,7 +117,20 @@ function MarkdownTable({
         // no-op
       }
     },
-    [],
+    [getTableData],
+  );
+
+  const handleDownload = useCallback(
+    (event: MouseEvent<HTMLButtonElement>) => {
+      const data = getTableData(event);
+      if (!data) return;
+
+      const csv = toCsvTable(data);
+      if (!csv) return;
+
+      downloadCsvFile(csv, "table.csv");
+    },
+    [getTableData],
   );
 
   return (
@@ -97,14 +140,21 @@ function MarkdownTable({
     >
       <div className="flex items-center justify-end gap-1">
         <button
-          className="text-muted-foreground hover:text-foreground cursor-pointer p-1 transition-all disabled:cursor-not-allowed disabled:opacity-50"
-          disabled={isLoading}
+          className="text-muted-foreground hover:text-foreground cursor-pointer p-1 transition-all"
           onClick={handleCopy}
           title={copyLabel}
           type="button"
         >
           {copied ? <CheckIcon size={14} /> : <CopyIcon size={14} />}
         </button>
+        <button
+          className="text-muted-foreground hover:text-foreground cursor-pointer p-1 transition-all"
+          onClick={handleDownload}
+          title={downloadLabel}
+          type="button"
+        >
+          <DownloadIcon size={14} />
+        </button>
       </div>
       <div className="overflow-x-auto">
         <table
@@ -165,7 +215,7 @@ export function MarkdownContent({
         <MarkdownTable
           className={className}
           copyLabel={t.clipboard.copyToClipboard}
-          isLoading={isLoading}
+          downloadLabel={t.common.download}
           {...props}
         >
           {children}
@@ -173,7 +223,12 @@ export function MarkdownContent({
       ),
       ...componentsFromProps,
     };
-  }, [componentsFromProps, isLoading, t.clipboard.copyToClipboard]);
+  }, [
+    componentsFromProps,
+    isLoading,
+    t.clipboard.copyToClipboard,
+    t.common.download,
+  ]);
 
   if (!content) return null;
 
diff --git a/frontend/src/components/workspace/messages/message-list-item.tsx b/frontend/src/components/workspace/messages/message-list-item.tsx
index 7cc04ea2..9e76aae8 100644
--- a/frontend/src/components/workspace/messages/message-list-item.tsx
+++ b/frontend/src/components/workspace/messages/message-list-item.tsx
@@ -27,9 +27,11 @@ import {
 import { resolveArtifactURL } from "@/core/artifacts/utils";
 import { useI18n } from "@/core/i18n/hooks";
 import {
+  extractSummaryTemplateBody,
   extractContentFromMessage,
   normalizeHumanMessageDisplayText,
   extractReasoningContentFromMessage,
+  isSummaryTemplateMessage,
   parseUploadedFiles,
   stripPriorityHintSuffix,
   stripUploadedFilesTag,
@@ -140,6 +142,7 @@ function MessageContent_({
   isLoading?: boolean;
   threadId: string;
 }) {
+  const { t } = useI18n();
   const rehypePlugins = useRehypeSplitWordsIntoSpans(isLoading);
   const isHuman = message.type === "human";
   const components = useMemo(
@@ -176,6 +179,15 @@ function MessageContent_({
     }
     return rawContent ?? "";
   }, [rawContent, isHuman]);
+  const isSummaryMessage = useMemo(
+    () => isHuman && isSummaryTemplateMessage(message),
+    [isHuman, message],
+  );
+  const summaryBody = useMemo(
+    () => (isSummaryMessage ? extractSummaryTemplateBody(message) : ""),
+    [isSummaryMessage, message],
+  );
+  const [isSummaryExpanded, setIsSummaryExpanded] = useState(false);
 
   const filesList =
     files && files.length > 0 && threadId ? (
@@ -211,6 +223,7 @@ function MessageContent_({
   }
 
   if (isHuman) {
+    const shouldRenderSummaryCollapse = isSummaryMessage && summaryBody;
     const messageResponse = contentToDisplay ? (
       <AIElementMessageResponse
         remarkPlugins={humanMessagePlugins.remarkPlugins}
@@ -223,8 +236,37 @@ function MessageContent_({
     return (
       <div className={cn("ml-auto flex flex-col gap-2", className)}>
         {filesList}
+        {shouldRenderSummaryCollapse && (
+          <details
+            className="w-fit max-w-full rounded-lg border"
+            open={isSummaryExpanded}
+            onToggle={(event) => {
+              setIsSummaryExpanded(event.currentTarget.open);
+            }}
+          >
+            <summary className="text-muted-foreground cursor-pointer px-3 py-2 text-xs select-none">
+              {isSummaryExpanded
+                ? t.toolCalls.collapseContent
+                : t.toolCalls.expandContent}
+            </summary>
+            <AIElementMessageContent className="w-fit border-t">
+              <AIElementMessageResponse
+                remarkPlugins={humanMessagePlugins.remarkPlugins}
+                rehypePlugins={humanMessagePlugins.rehypePlugins}
+                components={components}
+              >
+                {summaryBody}
+              </AIElementMessageResponse>
+            </AIElementMessageContent>
+          </details>
+        )}
         {messageResponse && (
-          <AIElementMessageContent className="w-fit">
+          <AIElementMessageContent
+            className={cn(
+              "w-fit",
+              shouldRenderSummaryCollapse ? "hidden" : undefined,
+            )}
+          >
             {messageResponse}
           </AIElementMessageContent>
         )}
diff --git a/frontend/src/core/messages/utils.ts b/frontend/src/core/messages/utils.ts
index 37c89480..c682fc39 100644
--- a/frontend/src/core/messages/utils.ts
+++ b/frontend/src/core/messages/utils.ts
@@ -26,6 +26,47 @@ type MessageGroup =
   | AssistantClarificationGroup
   | AssistantSubagentGroup;
 
+const SUMMARY_MESSAGE_TITLES = [
+  "Here is a summary of the conversation to date",
+  "以下是目前对话的摘要",
+];
+
+function escapeRegExp(value: string) {
+  return value.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
+}
+
+function getSummaryTemplateTitle(content: string) {
+  return (
+    SUMMARY_MESSAGE_TITLES.find((title) => {
+      const titlePattern = new RegExp(
+        `^\\s*${escapeRegExp(title)}\\s*[：:]?(?:\\n|$)`,
+        "i",
+      );
+      return titlePattern.test(content);
+    }) ?? null
+  );
+}
+
+export function isSummaryTemplateMessage(message: Message) {
+  if (message.type !== "human") {
+    return false;
+  }
+  return getSummaryTemplateTitle(extractTextFromMessage(message)) !== null;
+}
+
+export function extractSummaryTemplateBody(message: Message) {
+  const content = extractTextFromMessage(message);
+  const title = getSummaryTemplateTitle(content);
+  if (!title) {
+    return content;
+  }
+  const titlePrefixPattern = new RegExp(
+    `^\\s*${escapeRegExp(title)}\\s*[：:]?\\s*\\n*`,
+    "i",
+  );
+  return content.replace(titlePrefixPattern, "").trim();
+}
+
 export function groupMessages<T>(
   messages: Message[],
   mapper: (group: MessageGroup) => T,
@@ -57,6 +98,9 @@ export function groupMessages<T>(
     }
 
     if (message.type === "human") {
+      // if (isSummaryTemplateMessage(message)) {
+      //   continue;
+      // }
       groups.push({ id: message.id, type: "human", messages: [message] });
       continue;
     }