diff --git a/packages/cli/test-setup.ts b/packages/cli/test-setup.ts
index cc0ac0023..c26e57fa5 100644
--- a/packages/cli/test-setup.ts
+++ b/packages/cli/test-setup.ts
@@ -9,4 +9,10 @@ if (process.env['NO_COLOR'] !== undefined) {
   delete process.env['NO_COLOR'];
 }
 
+// Avoid writing per-session debug log files during CLI tests.
+// Individual tests can still opt in by overriding this env var explicitly.
+if (process.env['QWEN_DEBUG_LOG_FILE'] === undefined) {
+  process.env['QWEN_DEBUG_LOG_FILE'] = '0';
+}
+
 import './src/test-utils/customMatchers.js';
diff --git a/packages/core/src/tools/shell.test.ts b/packages/core/src/tools/shell.test.ts
index 693b03ec1..73047dbea 100644
--- a/packages/core/src/tools/shell.test.ts
+++ b/packages/core/src/tools/shell.test.ts
@@ -949,6 +949,24 @@ describe('ShellTool', () => {
       );
     });
 
+    it('should not surface file descriptor redirects as standalone commands in confirmation details', async () => {
+      const params = {
+        command: 'npm run build 2>&1 | head -100',
+        is_background: false,
+      };
+      const invocation = shellTool.build(params);
+
+      const permission = await invocation.getDefaultPermission();
+      expect(permission).toBe('ask');
+
+      const details = (await invocation.getConfirmationDetails(
+        new AbortController().signal,
+      )) as { rootCommand: string; permissionRules: string[] };
+
+      expect(details.rootCommand).toBe('npm');
+      expect(details.permissionRules).toEqual(['Bash(npm run *)']);
+    });
+
     it('should throw an error if validation fails', () => {
       expect(() =>
         shellTool.build({ command: '', is_background: false }),
diff --git a/packages/core/src/utils/shell-utils.test.ts b/packages/core/src/utils/shell-utils.test.ts
index 7a02ba4a7..561df685f 100644
--- a/packages/core/src/utils/shell-utils.test.ts
+++ b/packages/core/src/utils/shell-utils.test.ts
@@ -439,6 +439,16 @@ describe('getCommandRoots', () => {
     const result = getCommandRoots('ls\n\ngrep foo');
     expect(result).toEqual(['ls', 'grep']);
   });
+
+  it('should not treat file descriptor redirection as a command separator', () => {
+    const result = getCommandRoots('npm run build 2>&1 | head -100');
+    expect(result).toEqual(['npm', 'head']);
+  });
+
+  it('should not treat >| redirection as a pipeline separator', () => {
+    const result = getCommandRoots('echo hello >| out.txt');
+    expect(result).toEqual(['echo']);
+  });
 });
 
 describe('stripShellWrapper', () => {
diff --git a/packages/core/src/utils/shell-utils.ts b/packages/core/src/utils/shell-utils.ts
index f0cd2bb13..14aa87d82 100644
--- a/packages/core/src/utils/shell-utils.ts
+++ b/packages/core/src/utils/shell-utils.ts
@@ -126,6 +126,16 @@ export function splitCommands(command: string): string[] {
   let inDoubleQuotes = false;
   let i = 0;
 
+  const previousNonWhitespaceChar = (index: number): string | undefined => {
+    for (let j = index - 1; j >= 0; j--) {
+      const ch = command[j];
+      if (ch && !/\s/.test(ch)) {
+        return ch;
+      }
+    }
+    return undefined;
+  };
+
   while (i < command.length) {
     const char = command[i];
     const nextChar = command[i + 1];
@@ -145,14 +155,30 @@ export function splitCommands(command: string): string[] {
     if (!inSingleQuotes && !inDoubleQuotes) {
       if (
         (char === '&' && nextChar === '&') ||
-        (char === '|' && nextChar === '|')
+        (char === '|' && (nextChar === '|' || nextChar === '&'))
       ) {
         commands.push(currentCommand.trim());
         currentCommand = '';
         i++; // Skip the next character
-      } else if (char === ';' || char === '&' || char === '|') {
+      } else if (char === ';') {
         commands.push(currentCommand.trim());
         currentCommand = '';
+      } else if (char === '&') {
+        const prevChar = previousNonWhitespaceChar(i);
+        if (prevChar === '>' || prevChar === '<') {
+          currentCommand += char;
+        } else {
+          commands.push(currentCommand.trim());
+          currentCommand = '';
+        }
+      } else if (char === '|') {
+        const prevChar = previousNonWhitespaceChar(i);
+        if (prevChar === '>') {
+          currentCommand += char;
+        } else {
+          commands.push(currentCommand.trim());
+          currentCommand = '';
+        }
       } else if (char === '\r' && nextChar === '\n') {
         // Windows-style \r\n newline - treat as command separator
         commands.push(currentCommand.trim());
diff --git a/packages/vscode-ide-companion/src/services/acpConnection.test.ts b/packages/vscode-ide-companion/src/services/acpConnection.test.ts
index 376ee1d0a..7fc33db95 100644
--- a/packages/vscode-ide-companion/src/services/acpConnection.test.ts
+++ b/packages/vscode-ide-companion/src/services/acpConnection.test.ts
@@ -72,6 +72,7 @@ describe('AcpConnection readTextFile error mapping', () => {
     const prompt = vi.fn().mockResolvedValue({});
     const onEndTurn = vi.fn();
     const conn = new AcpConnection() as unknown as {
+      child: { killed: boolean; exitCode: number | null } | null;
       sdkConnection: {
         prompt: (params: {
           sessionId: string;
@@ -92,6 +93,7 @@ describe('AcpConnection readTextFile error mapping', () => {
       },
     ];
 
+    conn.child = { killed: false, exitCode: null };
     conn.sdkConnection = { prompt };
     conn.sessionId = 'session-1';
     conn.onEndTurn = onEndTurn;