diff --git a/app/Custom.Dockerfile b/app/Custom.Dockerfile
new file mode 100644
index 000000000..9a942fd2c
--- /dev/null
+++ b/app/Custom.Dockerfile
@@ -0,0 +1,12 @@
+FROM phpdocumentor-guides
+
+COPY --from=composer:latest /usr/bin/composer /usr/bin/composer
+
+WORKDIR /app
+
+RUN composer require phpdocumentor/guides-code phpdocumentor/guides-theme-bootstrap -W --prefer-dist
+
+COPY ./packages/guides-search /tmp/guides-search
+
+RUN composer config repositories.phpdocumentor/guides-search path /tmp/guides-search && \
+    composer require phpdocumentor/guides-search:dev-main@dev
diff --git a/app/Dockerfile b/app/Dockerfile
new file mode 100644
index 000000000..59e9758ba
--- /dev/null
+++ b/app/Dockerfile
@@ -0,0 +1,72 @@
+FROM php:8.4-cli AS builder
+
+COPY --from=ghcr.io/php/pie:bin /pie /usr/bin/pie
+
+RUN export DEBIAN_FRONTEND="noninteractive"; \
+    set -eux; \
+    apt-get update; \
+    apt-get install -y --no-install-recommends \
+        unzip \
+        curl \
+        ca-certificates \
+        build-essential \
+        pkg-config \
+        libssl-dev \
+        libclang-dev \
+        llvm-dev; \
+    rm -rf /var/lib/apt/lists/*
+
+ENV RUSTUP_HOME=/usr/local/rustup \
+    CARGO_HOME=/usr/local/cargo \
+    PATH=/usr/local/cargo/bin:$PATH \
+    RUST_VERSION=1.82.0
+
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | \
+    sh -s -- -y --profile minimal --default-toolchain ${RUST_VERSION} && \
+    chmod -R a+w $RUSTUP_HOME $CARGO_HOME && \
+    rustc --version && cargo --version
+
+RUN pie install jaapio/pagefind:dev-main@dev
+
+RUN rm -rf /usr/local/cargo/registry /usr/local/cargo/git
+
+FROM php:8.4-cli AS application
+
+COPY --from=builder /usr/local/lib/php /usr/local/lib/php
+
+RUN echo "extension=pagefind" > /usr/local/etc/php/conf.d/pagefind.ini
+
+RUN export DEBIAN_FRONTEND="noninteractive"; \
+    set -eux; \
+    apt-get update; \
+    apt-get install -y --no-install-recommends \
+        git \
+        unzip; \
+    rm -rf /var/lib/apt/lists/*
+
+COPY --from=composer:latest /usr/bin/composer /usr/bin/composer
+
+WORKDIR /app
+COPY composer.json composer.json
+
+RUN composer install --no-dev --optimize-autoloader
+
+# Production stage
+FROM php:8.4-cli AS production
+
+WORKDIR /app
+
+COPY --from=builder /usr/local/lib/php /usr/local/lib/php
+COPY --from=application /app /app
+
+RUN export DEBIAN_FRONTEND="noninteractive"; \
+    set -eux; \
+    apt-get update; \
+    apt-get install -y --no-install-recommends \
+        libclang1 libzip-dev; \
+    rm -rf /var/lib/apt/lists/*
+
+RUN echo "extension=pagefind" > /usr/local/etc/php/conf.d/pagefind.ini
+RUN docker-php-ext-install zip
+
+ENTRYPOINT ["php", "/app/vendor/bin/guides"]
diff --git a/app/composer.json b/app/composer.json
new file mode 100644
index 000000000..7609b091f
--- /dev/null
+++ b/app/composer.json
@@ -0,0 +1,19 @@
+{
+    "name": "phpdocumentor/guides-app",
+    "description": "phpDocumentor Guides CLI Application",
+    "type": "project",
+    "require": {
+        "php": "^8.1",
+        "ext-pagefind": "*",
+        "phpdocumentor/guides-cli": "^1.8"
+    },
+    "minimum-stability": "dev",
+    "prefer-stable": true,
+    "config": {
+        "sort-packages": true,
+        "allow-plugins": {
+            "composer/package-versions-deprecated": true
+        }
+    }
+}
+
diff --git a/packages/guides-search/LICENSE b/packages/guides-search/LICENSE
new file mode 100644
index 000000000..aabeb825a
--- /dev/null
+++ b/packages/guides-search/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2025 Jaap van Otterdijk
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/packages/guides-search/README.rst b/packages/guides-search/README.rst
new file mode 100644
index 000000000..38eb7396d
--- /dev/null
+++ b/packages/guides-search/README.rst
@@ -0,0 +1,37 @@
+
+..  image:: https://poser.pugx.org/phpdocumentor/guides-theme-bootstrap/require/php
+    :alt: PHP Version Require
+    :target: https://packagist.org/packages/phpdocumentor/guides-theme-bootstrap
+
+..  image:: https://poser.pugx.org/phpdocumentor/guides-theme-bootstrap/v/stable
+    :alt: Latest Stable Version
+    :target: https://packagist.org/packages/phpdocumentor/guides-theme-bootstrap
+
+..  image:: https://poser.pugx.org/phpdocumentor/guides-theme-bootstrap/v/unstable
+    :alt: Latest Unstable Version
+    :target: https://packagist.org/packages/phpdocumentor/guides-theme-bootstrap
+
+..  image:: https://poser.pugx.org/phpdocumentor/guides-theme-bootstrap/d/total
+    :alt: Total Downloads
+    :target: https://packagist.org/packages/phpdocumentor/guides-theme-bootstrap
+
+..  image:: https://poser.pugx.org/phpdocumentor/guides-theme-bootstrap/d/monthly
+    :alt: Monthly Downloads
+    :target: https://packagist.org/packages/phpdocumentor/guides-theme-bootstrap
+
+====================================
+phpDocumentor Guides Bootstrap Theme
+====================================
+
+This repository is part of `phpDocumentor's Guides library <https://github.com/phpDocumentor/guides>`__, a framework
+designed to take hand-written documentation in code repositories and create an AST (abstract syntax tree) from it.
+This AST is then fed to a renderer, which produces the desired output, such as HTML.
+
+The package `phpdocumentor/guides-theme-bootstrap <https://packagist.org/packages/phpdocumentor/guides-theme-bootstrap>`__ adds
+`bootstrap theme <https://getbootstrap.com/>`__ to the
+phpDocumentor's Guides library.
+
+:Mono-Repository:   https://github.com/phpDocumentor/guides
+:Documentation:     https://docs.phpdoc.org/components/guides/guides/index.html
+:Packagist:         https://packagist.org/packages/phpdocumentor/guides-theme-bootstrap
+:Contribution:      https://github.com/phpDocumentor/guides/tree/main/CONTRIBUTING.rst
diff --git a/packages/guides-search/composer.json b/packages/guides-search/composer.json
new file mode 100644
index 000000000..56b9e4f5d
--- /dev/null
+++ b/packages/guides-search/composer.json
@@ -0,0 +1,24 @@
+{
+    "name": "phpdocumentor/guides-search",
+    "description": "Search extension for phpDocumentor Guides",
+    "type": "library",
+    "license": "MIT",
+    "homepage": "https://www.phpdoc.org",
+    "config": {
+        "sort-packages": true
+    },
+    "autoload": {
+        "psr-4": {
+            "phpDocumentor\\Guides\\": "src/"
+        }
+    },
+    "require": {
+        "php": "^8.1",
+        "phpdocumentor/guides": "^1.0 || ^2.0"
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-main": "1.x-dev"
+        }
+    }
+}
diff --git a/packages/guides-search/resources/config/guides-search.php b/packages/guides-search/resources/config/guides-search.php
new file mode 100644
index 000000000..e97328aff
--- /dev/null
+++ b/packages/guides-search/resources/config/guides-search.php
@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+use phpDocumentor\Guides\Event\PostRenderProcess;
+use phpDocumentor\Guides\Search\Indexer;
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+
+return static function (ContainerConfigurator $container): void {
+    $container->services()
+        ->set(Indexer::class)
+        ->tag(
+            'event_listener',
+            ['event' => PostRenderProcess::class, 'method' => 'index'],
+        );
+};
diff --git a/packages/guides-search/src/Search/DependencyInjection/SearchExtension.php b/packages/guides-search/src/Search/DependencyInjection/SearchExtension.php
new file mode 100644
index 000000000..eba1af3f7
--- /dev/null
+++ b/packages/guides-search/src/Search/DependencyInjection/SearchExtension.php
@@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * This file is part of phpDocumentor.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ *
+ * @link https://phpdoc.org
+ */
+
+namespace phpDocumentor\Guides\Search\DependencyInjection;
+
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Extension\Extension;
+use Symfony\Component\DependencyInjection\Extension\PrependExtensionInterface;
+use Symfony\Component\DependencyInjection\Loader\PhpFileLoader;
+
+use Symfony\Component\EventDispatcher\EventDispatcher;
+use function dirname;
+
+final class SearchExtension extends Extension implements PrependExtensionInterface
+{
+    /** @param mixed[] $configs */
+    public function load(array $configs, ContainerBuilder $container): void
+    {
+        $loader = new PhpFileLoader(
+            $container,
+            new FileLocator(dirname(__DIR__, 3) . '/resources/config'),
+        );
+        $loader->load('guides-search.php');
+    }
+
+    public function prepend(ContainerBuilder $container): void
+    {
+    }
+}
diff --git a/packages/guides-search/src/Search/Indexer.php b/packages/guides-search/src/Search/Indexer.php
new file mode 100644
index 000000000..e383f4a5a
--- /dev/null
+++ b/packages/guides-search/src/Search/Indexer.php
@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+namespace phpDocumentor\Guides\Search;
+
+use phpDocumentor\Guides\Event\PostRenderProcess;
+
+final class Indexer
+{
+    public function index(PostRenderProcess $postRenderProcess): void
+    {
+        $command = $postRenderProcess->getCommand();
+        // Create a configuration
+        $config = new \Pagefind\ServiceConfig(
+            true,  // keep URL
+            true,  // verbose mode
+            'en'   // fallback language (optional, defaults to 'en')
+        );
+
+        $indexer = new \Pagefind\Indexer($config);
+        $fileSystem = $command->getDestination();
+
+        foreach ($fileSystem->listContents($command->getDestinationPath(), true) as $file)
+        {
+            if ($file['type'] !== 'file') {
+                continue;
+            }
+
+            if (!str_ends_with($file['path'], '.html')) {
+                continue;
+            }
+
+            $content = $fileSystem->read($file['path']);
+            if ($content === false) {
+                continue;
+            }
+
+            $indexer->addHtmlFile(
+                $file['path'],
+                $file['path'],
+                $content
+            );
+        }
+
+        foreach ($indexer->getFiles() as $file) {
+            $fileSystem->put('pagefind/' . $file->getFileName(), $file->getContents());
+        }
+    }
+}