diff --git a/app/modules/blog/app_blog.deploy.php b/app/modules/blog/app_blog.deploy.php
new file mode 100644
index 00000000..ab045980
--- /dev/null
+++ b/app/modules/blog/app_blog.deploy.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @file
+ * Deploy hooks for app_blog module.
+ */
+
+use Drupal\app_blog\Hook\Deploy\Deploy0001;
+
+/**
+ * Create 301 redirects from /blog/{nid} to slug-based URLs.
+ */
+function app_blog_deploy_0001(array &$sandbox): string {
+  return \Drupal::classResolver(Deploy0001::class)($sandbox);
+}
diff --git a/app/modules/blog/src/Hook/Deploy/Deploy0001.php b/app/modules/blog/src/Hook/Deploy/Deploy0001.php
new file mode 100644
index 00000000..36430b53
--- /dev/null
+++ b/app/modules/blog/src/Hook/Deploy/Deploy0001.php
@@ -0,0 +1,131 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\app_blog\Hook\Deploy;
+
+use Drupal\Component\Render\FormattableMarkup;
+use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Drupal\Core\Entity\Query\QueryInterface;
+use Drupal\Core\Site\Settings;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Removes numeric /blog/{nid} aliases, creates 301 redirects to node/{nid}.
+ */
+final class Deploy0001 implements ContainerInjectionInterface {
+
+  public function __construct(
+    private EntityTypeManagerInterface $entityTypeManager,
+  ) {}
+
+  public static function create(ContainerInterface $container): self {
+    return new self(
+      $container->get('entity_type.manager'),
+    );
+  }
+
+  protected function prepareBatch(array &$sandbox): void {
+    if (isset($sandbox['total'])) {
+      return;
+    }
+
+    $sandbox['total'] = (int) $this->getNodeQuery()->count()->execute();
+    $sandbox['current'] = 0;
+    $sandbox['created'] = 0;
+    $sandbox['skipped'] = 0;
+    $sandbox['aliases_removed'] = 0;
+    $sandbox['limit'] = Settings::get('entity_update_batch_size', 50);
+  }
+
+  protected function processBatch(array &$sandbox): void {
+    /** @var array<int|string> $nids */
+    $nids = $this
+      ->getNodeQuery()
+      ->range($sandbox['current'], $sandbox['limit'])
+      ->execute();
+
+    $redirect_storage = $this->entityTypeManager->getStorage('redirect');
+
+    foreach ($nids as $nid) {
+      $sandbox['aliases_removed'] += $this->removeNumericAliases((int) $nid);
+
+      $source_path = "blog/{$nid}";
+
+      $existing = $redirect_storage
+        ->getQuery()
+        ->accessCheck(FALSE)
+        ->condition('redirect_source.path', $source_path)
+        ->range(0, 1)
+        ->execute();
+
+      if ($existing !== []) {
+        $sandbox['skipped']++;
+      }
+      else {
+        $redirect = $redirect_storage->create([
+          'redirect_source' => $source_path,
+          'redirect_redirect' => "internal:/node/{$nid}",
+          'status_code' => 301,
+        ]);
+        $redirect_storage->save($redirect);
+        $sandbox['created']++;
+      }
+
+      $sandbox['current']++;
+    }
+
+    $sandbox['#finished'] = $sandbox['current'] / $sandbox['total'];
+  }
+
+  protected function removeNumericAliases(int $nid): int {
+    $alias_storage = $this->entityTypeManager->getStorage('path_alias');
+
+    /** @var array<int|string> $alias_ids */
+    $alias_ids = $alias_storage
+      ->getQuery()
+      ->accessCheck(FALSE)
+      ->condition('alias', "/blog/{$nid}")
+      ->execute();
+
+    if ($alias_ids === []) {
+      return 0;
+    }
+
+    $aliases = $alias_storage->loadMultiple($alias_ids);
+    $alias_storage->delete($aliases);
+
+    return \count($aliases);
+  }
+
+  protected function getNodeQuery(): QueryInterface {
+    return $this
+      ->entityTypeManager
+      ->getStorage('node')
+      ->getQuery()
+      ->accessCheck(FALSE)
+      ->condition('type', 'blog_entry')
+      ->sort('nid');
+  }
+
+  public function __invoke(array &$sandbox): string {
+    $this->prepareBatch($sandbox);
+
+    if ($sandbox['total'] === 0) {
+      $sandbox['#finished'] = 1;
+      return 'No blog entries found.';
+    }
+
+    $this->processBatch($sandbox);
+
+    return (string) new FormattableMarkup('@current of @total processed (@created redirects, @skipped skipped, @aliases aliases removed).', [
+      '@current' => $sandbox['current'],
+      '@total' => $sandbox['total'],
+      '@created' => $sandbox['created'],
+      '@skipped' => $sandbox['skipped'],
+      '@aliases' => $sandbox['aliases_removed'],
+    ]);
+  }
+
+}