From c231568d1f243acf1d39450ba71dee09bbd08308 Mon Sep 17 00:00:00 2001
From: James Ward <james@jamesward.com>
Date: Wed, 26 Aug 2026 12:43:29 -0600
Subject: [PATCH] Fix agent-toolkit prompt defaults

Treat an empty response as acceptance of the displayed default for the Agent Toolkit installation and MCP configuration prompts.
---
 .../customizations/agenttoolkit/configure.py  |  5 ++--
 awscli/customizations/prompts.py              |  5 +++-
 tests/unit/customizations/test_prompts.py     | 24 +++++++++++++++++++
 3 files changed, 31 insertions(+), 3 deletions(-)
 create mode 100644 tests/unit/customizations/test_prompts.py

diff --git a/awscli/customizations/agenttoolkit/configure.py b/awscli/customizations/agenttoolkit/configure.py
index 834752183f07..d8aedeae9cff 100644
--- a/awscli/customizations/agenttoolkit/configure.py
+++ b/awscli/customizations/agenttoolkit/configure.py
@@ -146,7 +146,8 @@ def _install_default_skills(self, selected_agents, client, yes=False):
         uni_print(f'  Found: {names}\n', self._stream)
 
         if not yes and not yes_no_choice(
-            f'\nInstall {len(default_skills)} default AWS skills? [Y/n]: '
+            f'\nInstall {len(default_skills)} default AWS skills? [Y/n]: ',
+            default=True,
         ):
             return
 
@@ -196,7 +197,7 @@ def _install_default_skills(self, selected_agents, client, yes=False):
 
     def _configure_mcp(self, agents, yes=False):
         if not yes and not yes_no_choice(
-            '\nConfigure AWS MCP server connection? [Y/n]: '
+            '\nConfigure AWS MCP server connection? [Y/n]: ', default=True
         ):
             return
 
diff --git a/awscli/customizations/prompts.py b/awscli/customizations/prompts.py
index a1a9921d1b24..e2e74311a42b 100644
--- a/awscli/customizations/prompts.py
+++ b/awscli/customizations/prompts.py
@@ -16,17 +16,20 @@
 from awscli.utils import is_stdin_a_tty
 
 
-def yes_no_choice(prompt):
+def yes_no_choice(prompt, default=None):
     """
     Prompts the user to answer a yes/no question.
     Continually re-prompts for invalid selections.
 
     :param prompt: Prompt text.
+    :param default: Optional boolean returned when the response is empty.
     :returns: True for yes, False for no.
     """
     while True:
         response = compat_input(prompt)
 
+        if response == '' and default is not None:
+            return default
         if response.lower() in ('y', 'yes'):
             return True
         elif response.lower() in ('n', 'no'):
diff --git a/tests/unit/customizations/test_prompts.py b/tests/unit/customizations/test_prompts.py
new file mode 100644
index 000000000000..f65bffa4c705
--- /dev/null
+++ b/tests/unit/customizations/test_prompts.py
@@ -0,0 +1,24 @@
+# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"). You
+# may not use this file except in compliance with the License. A copy of
+# the License is located at
+#
+#     http://aws.amazon.com/apache2.0/
+#
+# or in the "license" file accompanying this file. This file is
+# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
+# ANY KIND, either express or implied. See the License for the specific
+# language governing permissions and limitations under the License.
+from unittest.mock import patch
+
+from awscli.customizations.prompts import yes_no_choice
+
+
+def test_enter_accepts_yes_default():
+    with patch(
+        'awscli.customizations.prompts.compat_input', return_value=''
+    ) as input_mock:
+        assert yes_no_choice('Continue? [Y/n]: ', default=True)
+
+    input_mock.assert_called_once_with('Continue? [Y/n]: ')