diff --git a/.vscode/launch.json b/.vscode/launch.json
index c2a47d74891..d5343a3af79 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -3,7 +3,7 @@
     "configurations": [
         {
             "name": "Azure CLI Debug (Integrated Console)",
-            "type": "python",
+            "type": "debugpy",
             "request": "launch",
             "python": "${command:python.interpreterPath}",
             "program": "${workspaceRoot}/src/azure-cli/azure/cli/__main__.py",
@@ -12,16 +12,11 @@
                 "--help"
             ],
             "console": "integratedTerminal",
-            "debugOptions": [
-                "WaitOnAbnormalExit",
-                "WaitOnNormalExit",
-                "RedirectOutput"
-            ],
             "justMyCode": false
         },
         {
             "name": "Azure CLI Debug (External Console)",
-            "type": "python",
+            "type": "debugpy",
             "request": "launch",
             "stopOnEntry": true,
             "python": "${command:python.interpreterPath}",
@@ -31,14 +26,10 @@
                 "--help"
             ],
             "console": "externalTerminal",
-            "debugOptions": [
-                "WaitOnAbnormalExit",
-                "WaitOnNormalExit"
-            ]
         },
         {
             "name": "Azdev Scripts",
-            "type": "python",
+            "type": "debugpy",
             "request": "launch",
             "python": "${command:python.interpreterPath}",
             "program": "${workspaceRoot}/tools/automation/__main__.py",
@@ -47,11 +38,6 @@
                 "--help"
             ],
             "console": "integratedTerminal",
-            "debugOptions": [
-                "WaitOnAbnormalExit",
-                "WaitOnNormalExit",
-                "RedirectOutput"
-            ]
         }
     ]
-}
+}
\ No newline at end of file
diff --git a/src/azure-cli-core/azure/cli/core/__init__.py b/src/azure-cli-core/azure/cli/core/__init__.py
index e44a72fc5f1..97052466f8f 100644
--- a/src/azure-cli-core/azure/cli/core/__init__.py
+++ b/src/azure-cli-core/azure/cli/core/__init__.py
@@ -597,7 +597,7 @@ def get(self, args):
             return None
 
         # Get the top-level command, like `network` in `network vnet create -h`
-        top_command = args[0]
+        top_command = args[0].lower()
         index = self.INDEX[self._COMMAND_INDEX]
         # Check the command index for (command: [module]) mapping, like
         # "network": ["azure.cli.command_modules.natgateway", "azure.cli.command_modules.network", "azext_firewall"]
diff --git a/src/azure-cli-core/azure/cli/core/tests/test_command_registration.py b/src/azure-cli-core/azure/cli/core/tests/test_command_registration.py
index 21d03d47b5e..7d5fa26afe2 100644
--- a/src/azure-cli-core/azure/cli/core/tests/test_command_registration.py
+++ b/src/azure-cli-core/azure/cli/core/tests/test_command_registration.py
@@ -389,6 +389,42 @@ def update_and_check_index():
         del INDEX[CommandIndex._COMMAND_INDEX_CLOUD_PROFILE]
         del INDEX[CommandIndex._COMMAND_INDEX]
 
+    def test_command_index_case_sensitivity(self):
+        """Test that CommandIndex.get() method is case-insensitive for command arguments."""
+        from azure.cli.core._session import INDEX
+        from azure.cli.core import CommandIndex, __version__
+
+        cli = DummyCli()
+        command_index = CommandIndex(cli)
+
+        # Set up a command index with lowercase entries
+        INDEX[CommandIndex._COMMAND_INDEX_VERSION] = __version__
+        INDEX[CommandIndex._COMMAND_INDEX_CLOUD_PROFILE] = cli.cloud.profile
+        INDEX[CommandIndex._COMMAND_INDEX] = {
+            "hello": ["azure.cli.command_modules.hello"],
+            "account": ["azure.cli.command_modules.account"],
+            "version": ["azure.cli.command_modules.version"]
+        }
+
+        # Test lowercase - should work
+        result_lower = command_index.get(["hello", "world"])
+        self.assertIsNotNone(result_lower, "Lowercase 'hello' should be found in index")
+
+        # Test uppercase - should work with case sensitivity fix, fail without it
+        result_upper = command_index.get(["HELLO", "world"])
+
+        # Test mixed case - should work with case sensitivity fix, fail without it  
+        result_mixed = command_index.get(["Hello", "world"])
+
+        # These should work the same as lowercase (this will FAIL without the fix)
+        self.assertEqual(result_lower, result_upper, "Uppercase 'HELLO' should work same as lowercase 'hello'")
+        self.assertEqual(result_lower, result_mixed, "Mixed case 'Hello' should work same as lowercase 'hello'")
+
+        # Clean up
+        del INDEX[CommandIndex._COMMAND_INDEX_VERSION]
+        del INDEX[CommandIndex._COMMAND_INDEX_CLOUD_PROFILE]
+        del INDEX[CommandIndex._COMMAND_INDEX]
+
     @mock.patch('importlib.import_module', _mock_import_lib)
     @mock.patch('pkgutil.iter_modules', _mock_iter_modules)
     @mock.patch('azure.cli.core.commands._load_command_loader', _mock_load_command_loader)