diff --git a/internal/cloud/access-control.test.ts b/internal/cloud/access-control.test.ts
index 5361b741..a0461814 100644
--- a/internal/cloud/access-control.test.ts
+++ b/internal/cloud/access-control.test.ts
@@ -1860,6 +1860,80 @@ test("cloud api exposes final response for legacy progress-polluted snapshots (#
   }
 });
 
+test("cloud api trims folded progress from historical multi-turn final response snapshots (#934)", async () => {
+  const nowValue = "2026-06-05T13:39:48.000Z";
+  const projectId = "prj_hwpod_workbench";
+  const conversationId = "cnv_issue934_multiturn_history";
+  const sessionId = "ses_issue934_multiturn_history";
+  const firstTraceId = "trc_issue934_first_turn";
+  const secondTraceId = "trc_issue934_second_turn";
+  const threadId = "thread-issue-934-multiturn";
+  const firstFinalText = "当前工作区没有 `.hwlab/hwpod-spec.yaml`，也没有 `.hwlab` 目录或现成的 hwpod-spec 文件。这意味着这个 AgentRun 会话还没有绑定具体的 HWPOD。\n\n目前可用的 HWPOD：**0 个**（需要先创建 spec 并绑定）。\n\n如果你有已知的 HWPOD 信息（例如节点 ID、target 或 spec 模板），可以给我，我可以帮你生成 `.hwlab/hwpod-spec.yaml`。";
+  const secondUserText = "看看有几个hwpod可用?";
+  const progressText = "Let me check the available HWPODs using the `hwpod` CLI tool.当前工作区还没有 `.hwlab/hwpod-spec.yaml` 文件，所以 `hwpod inspect` 无法获取可用 HWPOD 信息。 让我看看仓库里有没有现成的 spec 示例或相关配置：";
+  const accessController = createAccessController({
+    env: { HWLAB_ACCESS_CONTROL_REQUIRED: "1", HWLAB_BOOTSTRAP_ADMIN_PASSWORD: "admin-pass" },
+    now: () => nowValue
+  });
+  const server = createCloudApiServer({ env: { HWLAB_ACCESS_CONTROL_REQUIRED: "1" }, accessController, now: () => nowValue });
+  await new Promise((resolve) => server.listen(0, "127.0.0.1", resolve));
+  try {
+    const { port } = server.address();
+    const login = await postJson(port, "/auth/login", { username: "admin", password: "admin-pass" });
+    assert.equal(login.status, 200);
+    const ownerUserId = login.body.actor.id;
+
+    accessController.store.agentSessions.set(sessionId, {
+      id: sessionId,
+      projectId,
+      agentId: "hwlab-code-agent",
+      status: "completed",
+      startedAt: nowValue,
+      endedAt: null,
+      ownerUserId,
+      conversationId,
+      threadId,
+      lastTraceId: firstTraceId,
+      updatedAt: nowValue,
+      session: {
+        source: "legacy-multiturn-progress-polluted-snapshot",
+        sessionStatus: "completed",
+        lastTraceId: firstTraceId,
+        finalResponse: {
+          text: firstFinalText,
+          textChars: firstFinalText.length,
+          role: "assistant",
+          status: "completed",
+          traceId: firstTraceId,
+          valuesPrinted: false
+        },
+        messages: [
+          { id: "msg_issue934_first_user", role: "user", title: "用户", text: "你好", status: "sent", traceId: firstTraceId, conversationId, sessionId, threadId, createdAt: nowValue },
+          { id: "msg_issue934_first_agent", role: "agent", title: "Code Agent 回复", text: firstFinalText, status: "completed", traceId: firstTraceId, conversationId, sessionId, threadId, createdAt: nowValue },
+          { id: "msg_issue934_second_user", role: "user", title: "用户", text: secondUserText, status: "sent", traceId: secondTraceId, conversationId, sessionId, threadId, createdAt: nowValue },
+          { id: "msg_issue934_second_agent", role: "agent", title: "Code Agent 回复", text: `${progressText}${firstFinalText}`, status: "completed", traceId: secondTraceId, conversationId, sessionId, threadId, createdAt: nowValue }
+        ],
+        messageCount: 4,
+        firstUserMessagePreview: "你好",
+        valuesRedacted: true,
+        secretMaterialStored: false
+      }
+    });
+
+    const direct = await getJson(port, `/v1/agent/conversations/${conversationId}?projectId=${projectId}`, login.cookie);
+    assert.equal(direct.status, 200);
+    assert.equal(direct.body.conversation.messages.length, 4);
+    assert.equal(direct.body.conversation.messages[1].text, firstFinalText);
+    assert.equal(direct.body.conversation.messages[3].text, firstFinalText);
+    assert.equal(direct.body.conversation.messages[3].traceId, secondTraceId);
+    assert.doesNotMatch(direct.body.conversation.messages[3].text, /Let me check|当前工作区还没有|让我看看/u);
+  } finally {
+    await new Promise((resolve, reject) => {
+      server.close((error) => (error ? reject(error) : resolve()));
+    });
+  }
+});
+
 test("access controller restores AgentRun mapping by Code Agent traceId", async () => {
   const accessController = createAccessController({ now: () => "2026-06-01T00:00:00.000Z" });
   await accessController.recordAgentSessionOwner({
diff --git a/internal/cloud/access-control.ts b/internal/cloud/access-control.ts
index 95384401..3d69ce49 100644
--- a/internal/cloud/access-control.ts
+++ b/internal/cloud/access-control.ts
@@ -1888,9 +1888,11 @@ function mergeAgentSessionOwnerEvidence(nextValue, existingValue) {
 function normalizeFinalResponseConversationMessages(messages, finalResponse) {
   const finalText = textOr(finalResponse?.text, "");
   const traceId = safeTraceIdLocal(finalResponse?.traceId);
-  if (!Array.isArray(messages) || !finalText || !traceId) return messages;
+  if (!Array.isArray(messages) || !finalText) return messages;
   return messages.map((message) => {
-    if (message?.role !== "agent" || safeTraceIdLocal(message.traceId) !== traceId) return message;
+    if (message?.role !== "agent") return message;
+    const sameTrace = traceId && safeTraceIdLocal(message.traceId) === traceId;
+    if (!sameTrace && !isFoldedProgressBeforeFinalResponse(message.text, finalText)) return message;
     return redactConversationMessage({
       ...message,
       text: finalText,
@@ -1899,6 +1901,16 @@ function normalizeFinalResponseConversationMessages(messages, finalResponse) {
     });
   }).filter(Boolean);
 }
+function isFoldedProgressBeforeFinalResponse(messageText, finalText) {
+  const text = textOr(messageText, "");
+  const final = textOr(finalText, "");
+  if (final.length < 80 || text.length <= final.length) return false;
+  const index = text.indexOf(final);
+  if (index <= 0) return false;
+  const prefix = text.slice(0, index).trim();
+  if (prefix.length < 20) return false;
+  return /\bLet me (?:check|inspect|look)\b|\bI(?:'|’)?ll (?:check|inspect|look)\b|我(?:先|来|再)?(?:确认|检查|查看|看看)|让我(?:确认|检查|查看|看看)|正在(?:确认|检查|查看)|当前工作区还没有|hwpod inspect/iu.test(prefix);
+}
 function mergeAgentSessionOwnerMessages(nextMessages = [], existingMessages = [], context = {}) {
   const next = dedupeConversationMessages(nextMessages);
   if (next.some((message) => message.role === "user")) return ensureTerminalUserMessage(next, context).slice(-50);