diff --git a/apps/mobile-shell/scripts/check-config.mjs b/apps/mobile-shell/scripts/check-config.mjs
index 7787b1905..dbfc094f2 100644
--- a/apps/mobile-shell/scripts/check-config.mjs
+++ b/apps/mobile-shell/scripts/check-config.mjs
@@ -2207,7 +2207,7 @@ if (
     'const clipboardText = normalizeHostBridgeClipboardText(',
   ) ||
   !clipboardSource.includes('Clipboard.setStringAsync(clipboardText.text)') ||
-  !clipboardSource.includes('await Clipboard.getStringAsync()')
+  !clipboardSource.includes('rawText = await Clipboard.getStringAsync()')
 ) {
   throw new Error(
     'mobile shell clipboard bridge must normalize text with the shared HostBridge clipboard boundary',
@@ -2236,6 +2236,8 @@ for (const snippet of [
   'writeMobileClipboardText(text)',
   'readMobileHostBridgeClipboardText',
   'ok(request, await readMobileClipboardText())',
+  "message: 'clipboard write unavailable'",
+  "message: 'clipboard read unavailable'",
 ]) {
   if (!clipboardSource.includes(snippet)) {
     throw new Error(`mobile shell clipboard module is missing ${snippet}`);
@@ -2245,6 +2247,10 @@ if (!clipboardTestSource.includes("'猫'.repeat(100000)")) {
   throw new Error('mobile shell clipboard tests must cover Unicode truncation');
 }
 for (const snippet of [
+  'maps native clipboard write failures to stable host errors',
+  "message: 'clipboard write unavailable'",
+  'maps native clipboard read failures to stable host errors',
+  "message: 'clipboard read unavailable'",
   'rejects unavailable clipboard text without reporting a successful empty value',
   'Clipboard.getStringAsync).mockResolvedValue(undefined as never)',
   "code: 'host_error'",
diff --git a/apps/mobile-shell/src/host-bridge/bridge.test.ts b/apps/mobile-shell/src/host-bridge/bridge.test.ts
index 506357b0b..07d728313 100644
--- a/apps/mobile-shell/src/host-bridge/bridge.test.ts
+++ b/apps/mobile-shell/src/host-bridge/bridge.test.ts
@@ -587,13 +587,17 @@ describe('handleMobileHostBridgeMessage', () => {
   });
 
   test('原生异常对象不会透传非协议错误码', async () => {
-    vi.mocked(Clipboard.getStringAsync).mockRejectedValue({
-      code: 'native_clipboard_failure',
-      message: 'native clipboard failed',
+    vi.mocked(Linking.canOpenURL).mockRejectedValue({
+      code: 'native_linking_failure',
+      message: 'native linking failed',
       nativeStackIOS: ['private native frame'],
     });
 
-    const response = await send(request('clipboard.readText'));
+    const response = await send(
+      request('app.openExternalUrl', {
+        url: 'https://example.com/path',
+      }),
+    );
 
     const failedResponse = expectFailed(response);
 
diff --git a/apps/mobile-shell/src/host-bridge/clipboard.test.ts b/apps/mobile-shell/src/host-bridge/clipboard.test.ts
index 1f1d49da4..05a5fd747 100644
--- a/apps/mobile-shell/src/host-bridge/clipboard.test.ts
+++ b/apps/mobile-shell/src/host-bridge/clipboard.test.ts
@@ -63,6 +63,17 @@ describe('mobile clipboard helpers', () => {
     expect(Clipboard.setStringAsync).not.toHaveBeenCalled();
   });
 
+  test('maps native clipboard write failures to stable host errors', async () => {
+    vi.mocked(Clipboard.setStringAsync).mockRejectedValueOnce(
+      new Error('native clipboard write failed'),
+    );
+
+    await expect(writeMobileClipboardText('作品号 PZ-1')).rejects.toMatchObject({
+      code: 'host_error',
+      message: 'clipboard write unavailable',
+    });
+  });
+
   test('wraps HostBridge clipboard write responses', async () => {
     const response = await writeMobileHostBridgeClipboardText(
       request('clipboard.writeText', {
@@ -128,6 +139,17 @@ describe('mobile clipboard helpers', () => {
     });
   });
 
+  test('maps native clipboard read failures to stable host errors', async () => {
+    vi.mocked(Clipboard.getStringAsync).mockRejectedValueOnce(
+      new Error('native clipboard read failed'),
+    );
+
+    await expect(readMobileClipboardText()).rejects.toMatchObject({
+      code: 'host_error',
+      message: 'clipboard read unavailable',
+    });
+  });
+
   test('wraps HostBridge clipboard read responses', async () => {
     vi.mocked(Clipboard.getStringAsync).mockResolvedValue('作品号 PZ-1');
 
diff --git a/apps/mobile-shell/src/host-bridge/clipboard.ts b/apps/mobile-shell/src/host-bridge/clipboard.ts
index 8b74e47ef..6aa3b1e28 100644
--- a/apps/mobile-shell/src/host-bridge/clipboard.ts
+++ b/apps/mobile-shell/src/host-bridge/clipboard.ts
@@ -15,7 +15,14 @@ export async function writeMobileClipboardText(rawText: unknown) {
     return false;
   }
 
-  await Clipboard.setStringAsync(clipboardText.text);
+  try {
+    await Clipboard.setStringAsync(clipboardText.text);
+  } catch {
+    throw {
+      code: 'host_error',
+      message: 'clipboard write unavailable',
+    } satisfies HostBridgeError;
+  }
   return true;
 }
 
@@ -37,9 +44,17 @@ export async function readMobileHostBridgeClipboardText(
 }
 
 export async function readMobileClipboardText(): Promise<ClipboardReadTextResult> {
-  const result = normalizeHostBridgeClipboardText(
-    await Clipboard.getStringAsync(),
-  );
+  let rawText: unknown;
+  try {
+    rawText = await Clipboard.getStringAsync();
+  } catch {
+    throw {
+      code: 'host_error',
+      message: 'clipboard read unavailable',
+    } satisfies HostBridgeError;
+  }
+
+  const result = normalizeHostBridgeClipboardText(rawText);
   if (!result) {
     throw {
       code: 'host_error',