diff --git a/src/building-build-configs-php-munich/code/generating-files.txt b/src/building-build-configs-php-munich/code/generating-files.txt
new file mode 100644
index 0000000..e69de29
diff --git a/src/building-build-configs-php-munich/diagram.png b/src/building-build-configs-php-munich/diagram.png
new file mode 100644
index 0000000..081415a
Binary files /dev/null and b/src/building-build-configs-php-munich/diagram.png differ
diff --git a/src/building-build-configs-php-munich/example.mp4 b/src/building-build-configs-php-munich/example.mp4
new file mode 100644
index 0000000..02f1d7b
Binary files /dev/null and b/src/building-build-configs-php-munich/example.mp4 differ
diff --git a/src/building-build-configs-php-munich/sections/conclusion.rst b/src/building-build-configs-php-munich/sections/conclusion.rst
new file mode 100644
index 0000000..985ec13
--- /dev/null
+++ b/src/building-build-configs-php-munich/sections/conclusion.rst
@@ -0,0 +1,27 @@
+.. raw:: pdf
+
+ PageBreak standardPage
+
+Result
+======
+
+- Easier and faster to create and onboard projects.
+- One canonical source of truth.
+- Easy to add new features and fixes for all projects.
+- Automation is easier due to consistency (e.g. Docker Compose service names).
+
+Thanks!
+=======
+
+References:
+
+- https://opdavi.es/build-configs
+- https://github.com/opdavies/docker-example-drupal
+- https://github.com/opdavies/docker-example-drupal-commerce-kickstart
+- https://github.com/opdavies/docker-example-drupal-localgov
+
+|
+
+Me:
+
+- https://www.oliverdavies.uk
diff --git a/src/building-build-configs-php-munich/sections/customisation.rst b/src/building-build-configs-php-munich/sections/customisation.rst
new file mode 100644
index 0000000..17324f7
--- /dev/null
+++ b/src/building-build-configs-php-munich/sections/customisation.rst
@@ -0,0 +1,52 @@
+.. raw:: pdf
+
+ PageBreak standardPage
+
+Overriding Values
+=================
+
+.. code-block:: yaml
+
+ php:
+ version: 8.1-fpm-bullseye
+ # Disable PHPCS, PHPStan and PHPUnit.
+ phpcs: false
+ phpstan: false
+ phpunit: false
+
+ # Ignore more directories from Git.
+ git:
+ ignore:
+ - /bin/
+ - /libraries/
+ - /web/profiles/contrib/
+
+.. raw:: pdf
+
+ TextAnnotation "Drupal Commerce Kickstart demo. No custom modules to test, and additional paths to ignore from Git."
+
+ PageBreak
+
+.. code-block:: yaml
+
+ dockerfile:
+ stages:
+ build:
+ # What additional directories do we need?
+ extra_directories:
+ - config
+ - patches
+ - scripts
+
+ commands:
+ - composer validate --strict
+ - composer install
+
+ # What additional PHP extensions do we need?
+ extensions:
+ install: [bcmath]
+
+.. raw:: pdf
+
+ TextAnnotation "Extra directories and PHP extensions that need to be added".
+
diff --git a/src/building-build-configs-php-munich/sections/example.rst b/src/building-build-configs-php-munich/sections/example.rst
new file mode 100644
index 0000000..6e8c115
--- /dev/null
+++ b/src/building-build-configs-php-munich/sections/example.rst
@@ -0,0 +1,92 @@
+Example
+=======
+
+build.yaml:
+
+.. code-block:: yaml
+
+ name: my-example-project
+ type: drupal
+ language: php
+
+ php:
+ version: 8.1-fpm-bullseye
+
+|
+
+Dockerfile:
+
+.. raw:: pdf
+
+ TextAnnotation "Abstract the project-specific values and configuration into this file."
+
+.. code-block:: yaml
+
+ FROM php:8.1-fpm-bullseye AS base
+
+Configuring a Project
+=====================
+
+.. code-block:: yaml
+
+ php:
+ version: 8.1-fpm-bullseye
+
+ # Which PHPCS standards should be used and on which paths?
+ phpcs:
+ paths: [web/modules/custom]
+ standards: [Drupal, DrupalPractice]
+
+ # What level should PHPStan run and on what paths?
+ phpstan:
+ level: max
+ paths: [web/modules/custom]
+
+.. raw:: pdf
+
+ PageBreak
+
+.. code-block:: yaml
+
+ docker-compose:
+ # Which Docker Compose services do we need?
+ services:
+ - database
+ - php
+ - web
+
+ dockerfile:
+ stages:
+ build:
+ # What commands do we need to run?
+ commands:
+ - composer validate --strict
+ - composer install
+
+.. raw:: pdf
+
+ PageBreak
+
+.. code-block:: yaml
+
+ web:
+ type: nginx # nginx, apache, caddy
+
+ database:
+ type: mariadb # mariadb, mysql
+ version: 10
+
+ # Where is Drupal located?
+ drupal:
+ docroot: web # web, docroot, null
+
+ experimental:
+ createGitHubActionsConfiguration: true
+ runGitHooksBeforePush: true
+ useNewDatabaseCredentials: true
+
+.. raw:: pdf
+
+ TextAnnotation "Experimental opt-in features that I want to trial on certain projects or to disable non-applicable features - e.g. GitHub Actions on Bitbucket."
+
+ PageBreak
diff --git a/src/building-build-configs-php-munich/sections/internals.rst b/src/building-build-configs-php-munich/sections/internals.rst
new file mode 100644
index 0000000..c007021
--- /dev/null
+++ b/src/building-build-configs-php-munich/sections/internals.rst
@@ -0,0 +1,300 @@
+.. raw:: pdf
+
+ PageBreak titlePage
+
+.. class:: centredtitle
+
+Build Configs internals
+
+.. raw:: pdf
+
+ PageBreak standardPage
+
+.. code-block::
+
+ src/
+ Action/
+ CreateFinalConfigurationData.php
+ CreateListOfFilesToGenerate.php
+ GenerateConfigurationFiles.php
+ ValidateConfigurationData.php
+ Command/
+ GenerateCommand.php
+ InitCommand.php
+ DataTransferObject/
+ ConfigDto.php
+ TemplateFile.php
+ Enum/
+ Language.php
+ ProjectType.php
+ WebServer.php
+
+.. code-block:: php
+ :linenos:
+ :startinline: true
+
+ protected function configure(): void
+ $this
+ ->addOption(
+ name: 'config-file',
+ shortcut: ['c'],
+ mode: InputOption::VALUE_REQUIRED,
+ description: 'The path to the project\'s build.yaml file',
+ default: 'build.yaml',
+ )
+ ->addOption(
+ name: 'output-dir',
+ shortcut: ['o'],
+ mode: InputOption::VALUE_REQUIRED,
+ description: 'The directory to create files in',
+ default: '.',
+ );
+ }
+
+.. code-block:: php
+ :linenos:
+ :startinline: true
+
+ protected function execute(InputInterface $input, OutputInterface $output): int
+ {
+ $io = new SymfonyStyle($input, $output);
+
+ $configFile = $input->getOption(name: 'config-file');
+ $outputDir = $input->getOption(name: 'output-dir');
+ }
+
+.. raw:: pdf
+
+ PageBreak
+
+.. code-block:: php
+ :linenos:
+ :startinline: true
+
+ protected function execute(InputInterface $input, OutputInterface $output): int
+ {
+ // ...
+
+ $pipelines = [
+ new CreateFinalConfigurationData(),
+
+ new ValidateConfigurationData(),
+
+ new CreateListOfFilesToGenerate(),
+
+ new GenerateConfigurationFiles(
+ $this->filesystem,
+ $this->twig,
+ $outputDir,
+ ),
+ ];
+ }
+
+.. code-block:: php
+ :linenos:
+ :startinline: true
+
+ protected function execute(InputInterface $input, OutputInterface $output): int
+ {
+ // ...
+
+ /**
+ * @var Collection<int,TemplateFile> $generatedFiles
+ * @var ConfigDto $configurationData
+ */
+ [$configurationData, $generatedFiles] = (new Pipeline())
+ ->send($configFile)
+ ->through($pipelines)
+ ->thenReturn();
+
+ $io->info("Building configuration for {$configurationData->name}.");
+
+ $io->write('Generated files:');
+ $io->listing(static::getListOfFiles(filesToGenerate: $generatedFiles)->toArray());
+
+ return Command::SUCCESS;
+ }
+
+.. code-block:: php
+ :linenos:
+ :startinline: true
+
+ // CreateFinalConfigurationData.php
+
+ public function handle(string $configFile, \Closure $next) {
+ {
+ $configurationData = Yaml::parseFile(filename: $configFile);
+
+ $configurationData = array_replace_recursive(
+ Yaml::parseFile(filename: __DIR__ . '/../../resources/build.defaults.yaml'),
+ $configurationData,
+ );
+
+ // ...
+
+ return $next($configurationData);
+ }
+
+.. raw:: pdf
+
+ PageBreak
+
+.. code-block:: php
+ :linenos:
+ :startinline: true
+
+ // ValidateConfigurationData.php
+
+ public function handle(array $configurationData, \Closure $next)
+ {
+ // Convert the input to a configuration data object.
+ $normalizer = new ObjectNormalizer(null, new CamelCaseToSnakeCaseNameConverter());
+ $serializer = new Serializer([$normalizer], [new JsonEncoder()]);
+
+ $configurationDataDto = $serializer->deserialize(
+ json_encode($configurationData),
+ ConfigDto::class,
+ 'json',
+ );
+
+ // ...
+ }
+
+.. raw:: pdf
+
+ PageBreak
+
+.. code-block:: php
+ :linenos:
+ :startinline: true
+
+ // ValidateConfigurationData.php
+
+ public function handle(array $configurationData, \Closure $next)
+ {
+ // ...
+
+ $validator = Validation::createValidatorBuilder()
+ ->enableAnnotationMapping()
+ ->getValidator();
+ $violations = $validator->validate($configurationDataDto);
+
+ if (0 < $violations->count()) {
+ throw new \RuntimeException('Configuration is invalid.');
+ }
+
+ return $next([$configurationData, $configurationDataDto]);
+ }
+
+.. code-block:: php
+ :linenos:
+ :startinline: true
+
+ // ConfigDto.php
+
+ #[Assert\Collection(
+ allowExtraFields: false,
+ fields: ['docroot' => new Assert\Choice([null, 'web', 'docroot'])],
+ )]
+ public array $drupal;
+
+ #[Assert\Collection([
+ 'ignore' => new Assert\Optional([
+ new Assert\All([
+ new Assert\Type('string'),
+ ]),
+ ]),
+ ])]
+ public array $git;
+
+ #[Assert\Choice(choices: ['javascript', 'php', 'typescript'])]
+ public string $language;
+
+ #[Assert\NotBlank]
+ #[Assert\Type('string')]
+ public string $name;
+
+ #[Assert\Type('string')]
+ public string $projectRoot;
+
+ #[Assert\Choice(choices: [
+ 'drupal',
+ 'fractal',
+ 'php-library',
+ 'symfony',
+ ])]
+ public string $type;
+
+.. code-block:: php
+ :startinline: true
+ :linenos:
+
+ // CreateListOfFilesToGenerate.php
+
+ public function handle(array $configurationDataAndDto, \Closure $next)
+ {
+ /**
+ * @var ConfigDto $configDto,
+ * @var array<string,mixed> $configurationData
+ */
+ [$configurationData, $configDto] = $configurationDataAndDto;
+
+ /** @var Collection<int, TemplateFile> */
+ $filesToGenerate = collect();
+
+ // ...
+ }
+
+.. code-block:: php
+ :startinline: true
+ :linenos:
+
+ // CreateListOfFilesToGenerate.php
+
+ public function handle(array $configurationDataAndDto, \Closure $next)
+ {
+ // ...
+
+ if (!isset($configDto->php['phpunit']) || $configDto->php['phpunit'] !== false) {
+
+ $filesToGenerate->push(
+ new TemplateFile(
+ data: 'drupal/phpunit.xml.dist',
+ name: 'phpunit.xml.dist',
+ )
+ );
+ }
+
+ // ...
+
+ return $next([$configurationData, $configDto, $filesToGenerate]);
+ }
+
+.. code-block:: php
+ :linenos:
+ :startinline: true
+
+ // GenerateConfigurationFiles.php
+
+ public function handle(array $filesToGenerateAndConfigurationData, \Closure $next)
+ {
+ // ...
+
+ $filesToGenerate->each(function(TemplateFile $templateFile) use ($configurationData): void {
+ if ($templateFile->path !== null) {
+ if (!$this->filesystem->exists($templateFile->path)) {
+ $this->filesystem->mkdir("{$this->outputDir}/{$templateFile->path}");
+ }
+ }
+
+ $sourceFile = "{$templateFile->data}.twig";
+
+ $outputFile = collect([$this->outputDir, $templateFile->path, $templateFile->name])
+ ->filter()->implode('/');
+
+ $this->filesystem->dumpFile($outputFile, $this->twig->render($sourceFile, $configurationData));
+ });
+
+ return $next([$configurationDataDto, $filesToGenerate]);
+ }
+
diff --git a/src/building-build-configs-php-munich/sections/intro.rst b/src/building-build-configs-php-munich/sections/intro.rst
new file mode 100644
index 0000000..83206bd
--- /dev/null
+++ b/src/building-build-configs-php-munich/sections/intro.rst
@@ -0,0 +1,51 @@
+.. raw:: pdf
+
+ PageBreak standardPage
+
+What is "Build Configs"?
+========================
+
+- Command-line tool.
+- Inspired by Workspace, name from the TheAltF4Stream.
+- Built with Symfony.
+- Creates and manages build configuration files.
+- Customisable per-project.
+- Drupal, PHP library, Fractal (TypeScript).
+- "Sprint zero in a box".
+
+What Problem Does it Solve?
+===========================
+
+- I work on multiple similar projects.
+- Different configuration values - e.g. ``web`` vs. ``docroot``.
+- Different versions of PHP, node, etc.
+- Different Docker Compose (``fpm`` vs. ``apache`` images).
+- Each project was separate.
+- Difficult to add new features and fix bugs across all projects.
+- Inconsistencies across projects.
+- Out of the box solutions didn't seem like the best fit.
+
+.. raw:: pdf
+
+ TextAnnotation "Multiple projects with similar but different configurations."
+ TextAnnotation ""
+ TextAnnotation "Out of the box solutions tend to focus on one technology, could be hard to customise, and usually had more than I nedeed."
+ TextAnnotation ""
+ TextAnnotation "Start small and build up instead of removing additional things."
+ TextAnnotation ""
+ TextAnnotation "More opportunities to learn the underlying technologies."
+
+How Does it Work?
+=================
+
+.. image:: diagram.png
+ :width: 18cm
+
+What Files Does it Generate?
+============================
+
+- Dockerfile, Docker Compose, Nix Flake, php.ini, NGINX default.conf.
+- ``run`` file.
+- PHPUnit, PHPCS, PHPStan.
+- GitHub Actions workflow.
+- Git hooks.
diff --git a/src/building-build-configs-php-munich/sections/templates.rst b/src/building-build-configs-php-munich/sections/templates.rst
new file mode 100644
index 0000000..b07ec59
--- /dev/null
+++ b/src/building-build-configs-php-munich/sections/templates.rst
@@ -0,0 +1,117 @@
+.. raw:: pdf
+
+ PageBreak standardPage
+
+Dockerfile.twig
+===============
+
+.. code-block:: twig
+ :linenos:
+
+ FROM php:{{ php.version }} AS base
+
+ COPY --from=composer:2 /usr/bin/composer /usr/bin/composer
+ RUN which composer && composer -V
+
+ ARG DOCKER_UID=1000
+ ENV DOCKER_UID="${DOCKER_UID}"
+
+ WORKDIR {{ project_root }}
+
+ RUN adduser --disabled-password --uid "${DOCKER_UID}" app \
+ && chown app:app -R {{ project_root }}
+
+Dockerfile.twig
+===============
+
+.. code-block:: twig
+ :linenos:
+
+ {% if dockerfile.stages.build.extensions.install %}
+ RUN docker-php-ext-install
+ {{ dockerfile.stages.build.extensions.install|join(' ') }}
+ {% endif %}
+
+ COPY --chown=app:app phpunit.xml* ./
+
+ {% if dockerfile.stages.build.extra_files %}
+ COPY --chown=app:app {{ dockerfile.stages.build.extra_files|join(" ") }} ./
+ {% endif %}
+
+ {% for directory in dockerfile.stages.build.extra_directories %}
+ COPY --chown=app:app {{ directory }} {{ directory }}
+ {% endfor %}
+
+docker-compose.yaml.twig
+========================
+
+.. code-block:: twig
+ :linenos:
+
+ services:
+ {% if "web" in dockerCompose.services %}
+ web:
+ <<: [*default-proxy, *default-app]
+ build:
+ context: .
+ target: web
+ depends_on:
+ - php
+ profiles: [web]
+ {% endif %}
+
+phpstan.neon.dist.twig
+======================
+
+.. code-block:: twig
+ :linenos:
+
+ parameters:
+ level: {{ php.phpstan.level }}
+ excludePaths:
+ - *Test.php
+ - *TestBase.php
+ paths:
+ {% for path in php.phpstan.paths -%}
+ - {{ path }}
+ {%- endfor %}
+
+ {% if php.phpstan.baseline %}
+ includes:
+ - phpstan-baseline.neon
+ {% endif %}
+
+phpunit.xml.dist.twig
+=====================
+
+.. code-block:: twig
+ :linenos:
+
+ <phpunit
+ beStrictAboutChangesToGlobalState="true"
+ beStrictAboutOutputDuringTests="false"
+ beStrictAboutTestsThatDoNotTestAnything="true"
+ bootstrap="{{ drupal.docroot }}/core/tests/bootstrap.php"
+ cacheResult="false"
+ colors="true"
+ failOnWarning="true"
+ printerClass="\Drupal\Tests\Listeners\HtmlOutputPrinter"
+ >
+
+phpunit.xml.dist.twig
+=====================
+
+.. code-block:: twig
+ :linenos:
+
+ <testsuites>
+ <testsuite name="functional">
+ <directory>./{{ drupal.docroot }}/modules/custom/**/tests/**/Functional</directory>
+ </testsuite>
+ <testsuite name="kernel">
+ <directory>./{{ drupal.docroot }}/modules/custom/**/tests/**/Kernel</directory>
+ </testsuite>
+ <testsuite name="unit">
+ <directory>./{{ drupal.docroot }}/modules/custom/**/tests/**/Unit</directory>
+ </testsuite>
+ </testsuites>
diff --git a/src/building-build-configs-php-munich/slides.rst b/src/building-build-configs-php-munich/slides.rst
new file mode 100644
index 0000000..0f2dafb
--- /dev/null
+++ b/src/building-build-configs-php-munich/slides.rst
@@ -0,0 +1,30 @@
+.. footer:: @opdavies
+
+Building "Build Configs"
+########################
+
+.. class:: titleslideinfo
+
+Oliver Davies (@opdavies)
+
+|
+
+.. class:: titleslideinfo
+
+https://opdavi.es/bcm
+
+.. include:: ./sections/intro.rst
+.. include:: ./sections/example.rst
+.. include:: ./sections/customisation.rst
+.. include:: ./sections/templates.rst
+.. include:: ./sections/internals.rst
+
+.. raw:: pdf
+
+ PageBreak titlePage
+
+.. class:: centredtitle
+
+Demo
+
+.. include:: ./sections/conclusion.rst