diff --git a/scripts/check-native-shells.mjs b/scripts/check-native-shells.mjs
index 70dab7944..dfab2a1aa 100644
--- a/scripts/check-native-shells.mjs
+++ b/scripts/check-native-shells.mjs
@@ -1165,6 +1165,21 @@ function assertH5HostBridgePayloadBoundaries() {
       'H5 HostBridge facade must normalize clipboard.writeText payloads with the shared clipboard boundary',
     );
   }
+  if (
+    !h5HostBridgeSource.includes(
+      'const clipboardText = normalizeHostBridgeClipboardText(',
+    ) ||
+    !h5HostBridgeSource.includes(
+      "await requestNativeAppHostBridge<ClipboardReadTextResult>(\n          'clipboard.readText',",
+    ) ||
+    !h5HostBridgeSource.includes(
+      'return clipboardText ?? false;',
+    )
+  ) {
+    throw new Error(
+      'H5 HostBridge facade must normalize clipboard.readText results with the shared clipboard boundary',
+    );
+  }
   if (
     !h5HostBridgeSource.includes(
       'const style = normalizeHostBridgeHapticsImpactStyle(params.style);',
diff --git a/src/services/host-bridge/hostBridge.test.ts b/src/services/host-bridge/hostBridge.test.ts
index fb1ef6a8f..1a2527138 100644
--- a/src/services/host-bridge/hostBridge.test.ts
+++ b/src/services/host-bridge/hostBridge.test.ts
@@ -4,6 +4,7 @@ import { afterEach, describe, expect, test, vi } from 'vitest';
 
 import type { HostBridgeCapability } from '../../../packages/shared/src/contracts/hostBridge';
 import {
+  HOST_BRIDGE_CLIPBOARD_TEXT_MAX_LENGTH,
   HOST_BRIDGE_RUNTIME_REFRESH_TIMEOUT_MS,
   HOST_BRIDGE_SCANNER_TIMEOUT_MS,
   HOST_BRIDGE_USER_INTERACTION_TIMEOUT_MS,
@@ -1485,6 +1486,42 @@ describe('hostBridge', () => {
     });
   });
 
+  test('原生 App HostBridge 读取剪贴板结果按共享清单归一化', async () => {
+    const oversizedText = 'a'.repeat(HOST_BRIDGE_CLIPBOARD_TEXT_MAX_LENGTH + 5);
+    const invoke = vi.fn(
+      async (_command: string, args?: Record<string, unknown>) => {
+        const request = (args as { request: { id: string } }).request;
+        return {
+          bridge: 'GenarrativeHostBridge',
+          version: 1,
+          id: request.id,
+          ok: true,
+          result: {
+            text:
+              invoke.mock.calls.length === 1
+                ? 42
+                : oversizedText,
+          },
+        };
+      },
+    );
+    window.__TAURI__ = {
+      core: { invoke: asTauriInvoke(invoke) },
+    };
+    window.history.replaceState(
+      null,
+      '',
+      nativeAppPath(['clipboard.readText']),
+    );
+
+    await expect(readHostClipboardText()).resolves.toBe(false);
+    await expect(readHostClipboardText()).resolves.toEqual({
+      text: oversizedText.slice(0, HOST_BRIDGE_CLIPBOARD_TEXT_MAX_LENGTH),
+    });
+
+    expect(invoke).toHaveBeenCalledTimes(2);
+  });
+
   test('原生 App 宿主不支持能力时回退到 H5 路径', async () => {
     window.history.replaceState(null, '', nativeAppPath());
     window.__TAURI__ = {
diff --git a/src/services/host-bridge/hostBridge.ts b/src/services/host-bridge/hostBridge.ts
index 59c9fc2d8..ab698d07d 100644
--- a/src/services/host-bridge/hostBridge.ts
+++ b/src/services/host-bridge/hostBridge.ts
@@ -889,13 +889,14 @@ export async function readHostClipboardText() {
   }
 
   try {
-    return normalizeHostBridgeClipboardText(
+    const clipboardText = normalizeHostBridgeClipboardText(
       (
         await requestNativeAppHostBridge<ClipboardReadTextResult>(
           'clipboard.readText',
         )
       )?.text,
     );
+    return clipboardText ?? false;
   } catch {
     return false;
   }