diff --git a/extensions/telegram/src/channel.ts b/extensions/telegram/src/channel.ts
index f0cdfca63717..d222facee1b8 100644
--- a/extensions/telegram/src/channel.ts
+++ b/extensions/telegram/src/channel.ts
@@ -90,6 +90,7 @@ import {
   createTelegramPluginBase,
   findTelegramTokenOwnerAccountId,
   formatDuplicateTelegramTokenReason,
+  resolveTelegramConfigAccessorAccount,
   telegramConfigAdapter,
 } from "./shared.js";
 import { withTelegramStartupProbeSlot } from "./startup-probe-limiter.js";
@@ -1246,7 +1247,8 @@ export const telegramPlugin = createChatChannelPlugin({
   },
   security: telegramSecurityAdapter,
   threading: {
-    topLevelReplyToMode: "telegram",
+    resolveReplyToMode: ({ cfg, accountId }) =>
+      resolveTelegramConfigAccessorAccount({ cfg, accountId }).config.replyToMode ?? "off",
     buildToolContext: (params) => buildTelegramThreadingToolContext(params),
     resolveAutoThreadId: ({ to, toolContext }) => resolveTelegramAutoThreadId({ to, toolContext }),
     resolveCurrentChannelId: ({ to, threadId }) => {
diff --git a/extensions/telegram/src/shared.ts b/extensions/telegram/src/shared.ts
index 4c3e8ddf6a88..9ce58169ca7e 100644
--- a/extensions/telegram/src/shared.ts
+++ b/extensions/telegram/src/shared.ts
@@ -104,7 +104,7 @@ function isBlockedByMultiBotGuard(cfg: OpenClawConfig, accountId: string): boole
   return !resolveNormalizedAccountEntry(accounts, accountId, normalizeAccountId);
 }
 
-function resolveTelegramConfigAccessorAccount(params: {
+export function resolveTelegramConfigAccessorAccount(params: {
   cfg: OpenClawConfig;
   accountId?: string | null;
 }): TelegramConfigAccessorAccount {
diff --git a/extensions/telegram/src/threading-tool-context.test.ts b/extensions/telegram/src/threading-tool-context.test.ts
index f3169347c698..d0f6b01411ca 100644
--- a/extensions/telegram/src/threading-tool-context.test.ts
+++ b/extensions/telegram/src/threading-tool-context.test.ts
@@ -1,8 +1,67 @@
 // Telegram tests cover threading tool context plugin behavior.
 import type { OpenClawConfig } from "openclaw/plugin-sdk/config-contracts";
-import { describe, expect, it } from "vitest";
+import { describe, expect, it, vi } from "vitest";
+import { telegramPlugin } from "./channel.js";
 import { buildTelegramThreadingToolContext } from "./threading-tool-context.js";
 
+const tryReadSecretFileSyncMock = vi.hoisted(() =>
+  vi.fn(() => {
+    throw new Error("reply mode must not read Telegram credentials");
+  }),
+);
+
+vi.mock("openclaw/plugin-sdk/secret-file-runtime", async (importOriginal) => ({
+  ...(await importOriginal<typeof import("openclaw/plugin-sdk/secret-file-runtime")>()),
+  tryReadSecretFileSync: tryReadSecretFileSyncMock,
+}));
+
+describe("telegramPlugin reply threading", () => {
+  it.each([
+    {
+      name: "uses an account override",
+      telegram: {
+        accounts: {
+          sut: {
+            tokenFile: "/tmp/openclaw-telegram-reply-mode-must-not-read",
+            replyToMode: "first" as const,
+          },
+        },
+      },
+      expected: "first",
+    },
+    {
+      name: "inherits the top-level mode",
+      telegram: {
+        replyToMode: "all" as const,
+        accounts: {
+          sut: {
+            botToken: { source: "file", provider: "telegram_token", id: "value" },
+          },
+        },
+      },
+      expected: "all",
+    },
+    {
+      name: "allows an account to disable replies",
+      telegram: {
+        replyToMode: "all" as const,
+        accounts: { sut: { replyToMode: "off" as const } },
+      },
+      expected: "off",
+    },
+  ])("$name", ({ telegram, expected }) => {
+    tryReadSecretFileSyncMock.mockClear();
+    const resolveReplyToMode = telegramPlugin.threading?.resolveReplyToMode;
+    if (!resolveReplyToMode) {
+      throw new Error("Telegram reply mode resolver is unavailable");
+    }
+
+    const cfg = { channels: { telegram } } as unknown as OpenClawConfig;
+    expect(resolveReplyToMode({ cfg, accountId: "sut" })).toBe(expected);
+    expect(tryReadSecretFileSyncMock).not.toHaveBeenCalled();
+  });
+});
+
 describe("buildTelegramThreadingToolContext", () => {
   it("keeps topic thread state in plugin-owned tool context", () => {
     const hasRepliedRef = { value: false };