docs: add AI-assisted Windows install guide

Author: hungrytech

README.ja.md

@@ -194,7 +194,20 @@ uv run --locked python -m benchmarks.retrieval_quality \
 
 ### ネイティブ Windows
 
-PowerShell を開き、バージョンが固定されたインストーラーをダウンロードして内容を確認した後、実行します：
+最も簡単な方法は、AI コーディングアシスタントに公式リポジトリのリンクを渡し、インストールと検証を依頼することです。Windows PC でコマンドを実行できる Claude Code、Codex などのエージェントに、次のプロンプトをそのまま貼り付けてください：
+
+```text
+Install WikiBrain on this Windows machine from https://github.com/hungrytech/wikibrain.
+Read the repository's Native Windows instructions first. Before changing anything,
+tell me whether native Windows or WSL is the correct path for where my agents and
+repositories run. Use the version-pinned installer from the README. Download it,
+show me the full PowerShell script, explain the settings changed by initialization,
+then stop and wait for my explicit approval before running the script or initializing
+WikiBrain. After I approve, install it and finish by running brainctl doctor.
+Do not bypass Codex hook trust.
+```
+
+AI が提示した計画と権限要求を確認してから進めてください。手動でインストールする場合は、PowerShell を開き、バージョンが固定されたインストーラーをダウンロードして内容を確認した後、実行します：
 
 ```powershell
 $installer = Join-Path $env:TEMP "install-wikibrain.ps1"

README.ko.md

@@ -228,7 +228,23 @@ Intel macOS, x86_64 Linux용 bottle을 제공합니다.
 
 ### 네이티브 Windows
 
-PowerShell에서 버전이 고정된 설치 스크립트를 내려받아 검토한 뒤 실행합니다.
+가장 쉬운 방법은 AI 코딩 도구에 공식 저장소 링크를 주고 설치와 검증을 요청하는
+것입니다. Windows PC에서 명령을 실행할 수 있는 Claude Code, Codex 등의
+에이전트에 아래 내용을 그대로 붙여 넣으세요.
+
+```text
+Install WikiBrain on this Windows machine from https://github.com/hungrytech/wikibrain.
+Read the repository's Native Windows instructions first. Before changing anything,
+tell me whether native Windows or WSL is the correct path for where my agents and
+repositories run. Use the version-pinned installer from the README. Download it,
+show me the full PowerShell script, explain the settings changed by initialization,
+then stop and wait for my explicit approval before running the script or initializing
+WikiBrain. After I approve, install it and finish by running brainctl doctor.
+Do not bypass Codex hook trust.
+```
+
+AI가 제시한 계획과 권한 요청을 확인한 뒤 진행하세요. 직접 설치하려면 PowerShell에서
+버전이 고정된 설치 스크립트를 내려받아 검토한 뒤 실행합니다.
 
 ```powershell
 $installer = Join-Path $env:TEMP "install-wikibrain.ps1"

README.md

@@ -236,7 +236,23 @@ cover Apple Silicon macOS, Intel macOS, and x86_64 Linux.
 
 ### Native Windows
 
-Open PowerShell, download the versioned installer, review it, then run it:
+The easiest route is to give your AI coding assistant the official repository
+link and ask it to perform and verify the installation. Paste this prompt into
+Claude Code, Codex, or another agent that can run commands on your Windows PC:
+
+```text
+Install WikiBrain on this Windows machine from https://github.com/hungrytech/wikibrain.
+Read the repository's Native Windows instructions first. Before changing anything,
+tell me whether native Windows or WSL is the correct path for where my agents and
+repositories run. Use the version-pinned installer from the README. Download it,
+show me the full PowerShell script, explain the settings changed by initialization,
+then stop and wait for my explicit approval before running the script or initializing
+WikiBrain. After I approve, install it and finish by running brainctl doctor.
+Do not bypass Codex hook trust.
+```
+
+Review the AI's plan and every permission prompt. If you prefer to install it
+manually, open PowerShell, download the versioned installer, review it, then run it:
 
 ```powershell
 $installer = Join-Path $env:TEMP "install-wikibrain.ps1"

README.zh-CN.md

@@ -212,7 +212,20 @@ Apple Silicon macOS、Intel macOS 和 x86_64 Linux。
 
 ### 原生 Windows
 
-打开 PowerShell，下载指定版本的安装程序，审查后再运行：
+最简单的方法是把官方仓库链接交给 AI 编程助手，请它完成安装并进行验证。将以下提示原样粘贴到能够在你的 Windows 电脑上执行命令的 Claude Code、Codex 或其他智能体中：
+
+```text
+Install WikiBrain on this Windows machine from https://github.com/hungrytech/wikibrain.
+Read the repository's Native Windows instructions first. Before changing anything,
+tell me whether native Windows or WSL is the correct path for where my agents and
+repositories run. Use the version-pinned installer from the README. Download it,
+show me the full PowerShell script, explain the settings changed by initialization,
+then stop and wait for my explicit approval before running the script or initializing
+WikiBrain. After I approve, install it and finish by running brainctl doctor.
+Do not bypass Codex hook trust.
+```
+
+确认 AI 给出的计划和所有权限请求后再继续。如果你希望手动安装，请打开 PowerShell，下载指定版本的安装程序，审查后再运行：
 
 ```powershell
 $installer = Join-Path $env:TEMP "install-wikibrain.ps1"

tests/test_windows_packaging.py

@@ -26,6 +26,38 @@ def test_installer_and_readmes_use_the_release_version(self) -> None:
         self.assertIn(expected_path, english)
         self.assertIn(expected_path, korean)
 
+    def test_all_readmes_offer_a_safe_ai_assisted_windows_install_prompt(self) -> None:
+        prompt = """Install WikiBrain on this Windows machine from https://github.com/hungrytech/wikibrain.
+Read the repository's Native Windows instructions first. Before changing anything,
+tell me whether native Windows or WSL is the correct path for where my agents and
+repositories run. Use the version-pinned installer from the README. Download it,
+show me the full PowerShell script, explain the settings changed by initialization,
+then stop and wait for my explicit approval before running the script or initializing
+WikiBrain. After I approve, install it and finish by running brainctl doctor.
+Do not bypass Codex hook trust."""
+        fenced_prompt = f"```text\n{prompt}\n```"
+        pinned_installer = (
+            f"/wikibrain/v{__version__}/scripts/install-windows.ps1"
+        )
+
+        for readme_name in (
+            "README.md",
+            "README.ko.md",
+            "README.ja.md",
+            "README.zh-CN.md",
+        ):
+            readme = (ROOT / readme_name).read_text(encoding="utf-8")
+            native_start = readme.index('<a id="native-windows"></a>')
+            native_end = readme.index("<details>", native_start)
+            native_section = readme[native_start:native_end]
+            with self.subTest(readme=readme_name):
+                self.assertIn(fenced_prompt, native_section)
+                self.assertIn(pinned_installer, native_section)
+                self.assertLess(
+                    native_section.index(fenced_prompt),
+                    native_section.index("```powershell"),
+                )
+
     def test_windows_installer_is_review_first_and_does_not_use_iex(self) -> None:
         installer = (ROOT / "scripts" / "install-windows.ps1").read_text(
             encoding="utf-8"