diff --git a/.circleci/config.yml b/.circleci/config.yml
index aac48843d0..d02239c60c 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -198,7 +198,6 @@ jobs:
       - run:
           name: Lint module code with NodeJS linters
           command: docker compose exec -T cli bash -c "npm run lint" || [ "${VORTEX_CI_NODEJS_LINT_IGNORE_FAILURE:-0}" -eq 1 ]
-      #;> TOOL_ESLINT_STYLELINT
 
       #;< DRUPAL_THEME
       - run:
@@ -207,6 +206,7 @@ jobs:
             [ "${VORTEX_FRONTEND_BUILD_SKIP:-0}" -eq 1 ] && exit 0
             docker compose exec -T cli bash -c "npm --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} run lint" || [ "${VORTEX_CI_NODEJS_LINT_IGNORE_FAILURE:-0}" -eq 1 ]
       #;> DRUPAL_THEME
+      #;> TOOL_ESLINT_STYLELINT
 
   # Audit job runs in its own workflow, independently of the commit workflow.
   audit:
diff --git a/.github/workflows/build-test-deploy.yml b/.github/workflows/build-test-deploy.yml
index 917bc8c418..4839252546 100644
--- a/.github/workflows/build-test-deploy.yml
+++ b/.github/workflows/build-test-deploy.yml
@@ -191,7 +191,6 @@ jobs:
       - name: Lint module code with NodeJS linters
         run: docker compose exec -T cli bash -c "npm run lint"
         continue-on-error: ${{ vars.VORTEX_CI_NODEJS_LINT_IGNORE_FAILURE == '1' }}
-      #;> TOOL_ESLINT_STYLELINT
 
       #;< DRUPAL_THEME
       - name: Lint theme code with NodeJS linters
@@ -199,6 +198,7 @@ jobs:
         run: docker compose exec -T cli bash -c "npm --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} run lint"
         continue-on-error: ${{ vars.VORTEX_CI_NODEJS_LINT_IGNORE_FAILURE == '1' }}
       #;> DRUPAL_THEME
+      #;> TOOL_ESLINT_STYLELINT
 
   #;< !PROVISION_TYPE_PROFILE
   database:
diff --git a/.vortex/installer/src/Prompts/Handlers/Tools.php b/.vortex/installer/src/Prompts/Handlers/Tools.php
index 2020b04263..d910f21dc2 100644
--- a/.vortex/installer/src/Prompts/Handlers/Tools.php
+++ b/.vortex/installer/src/Prompts/Handlers/Tools.php
@@ -8,6 +8,7 @@
 use AlexSkrypnyk\File\Replacer\Replacement;
 use DrevOps\VortexInstaller\Utils\File;
 use DrevOps\VortexInstaller\Utils\JsonManipulator;
+use DrevOps\VortexInstaller\Utils\NpmLock;
 use DrevOps\VortexInstaller\Utils\Strings;
 use DrevOps\VortexInstaller\Utils\Yaml;
 use function iter\flatten;
@@ -154,9 +155,7 @@ protected function processTool(string $name): void {
       JsonManipulator::updateFile($this->tmpDir . '/composer.json', $tool['composer.json']);
     }
 
-    if (isset($tool['package.json']) && is_callable($tool['package.json'])) {
-      JsonManipulator::updateFile($this->tmpDir . '/package.json', $tool['package.json']);
-    }
+    $this->processNpmManifests($tool);
 
     if (isset($tool['ahoy'])) {
       foreach ($tool['ahoy'] as $string) {
@@ -167,10 +166,57 @@ protected function processTool(string $name): void {
       }
     }
 
+    $this->processContent($tool);
+
+    File::removeTokenAsync('TOOL_' . strtoupper($name));
+  }
+
+  protected function processGroup(string $name): void {
+    $config = self::getToolDefinitions('groups')[$name];
+    $selected_tools = $this->getResponseAsArray();
+
+    if (!isset($config['tools']) || array_intersect($config['tools'], $selected_tools)) {
+      return;
+    }
+
+    $this->processNpmManifests($config);
+
+    if (isset($config['files'])) {
+      $files = array_map(fn($file): string => $this->tmpDir . '/' . $file, $config['files']);
+      File::remove($files);
+    }
+
+    if (isset($config['ahoy'])) {
+      foreach ($config['ahoy'] as $string) {
+        File::replaceContentInFile($this->tmpDir . '/.ahoy.yml', Replacement::create('ahoy_tool', function (string $content) use ($string): string {
+          $content = File::replaceContent($content, $string, '');
+          return Yaml::collapseEmptyLinesInLiteralBlock($content);
+        }));
+      }
+    }
+
+    $this->processContent($config);
+
+    if (isset($config['token'])) {
+      File::removeTokenAsync($config['token']);
+    }
+  }
+
+  /**
+   * Queue the content removals declared by a tool or a group.
+   *
+   * @param array $config
+   *   Tool or group definition.
+   */
+  protected function processContent(array $config): void {
+    if (!isset($config['strings']) && !isset($config['lines'])) {
+      return;
+    }
+
     File::replaceContentAsync(
-      function (string $content, ContentFile $file) use ($tool): string {
-        if (isset($tool['strings'])) {
-          foreach ($tool['strings'] as $string) {
+      function (string $content, ContentFile $file) use ($config): string {
+        if (isset($config['strings'])) {
+          foreach ($config['strings'] as $string) {
             if (Strings::isRegex($string)) {
               $replaced = preg_replace($string, '', $content, -1, $count);
 
@@ -184,9 +230,9 @@ function (string $content, ContentFile $file) use ($tool): string {
           }
         }
 
-        if (isset($tool['lines'])) {
+        if (isset($config['lines'])) {
           $relative_file_path = str_replace($this->tmpDir . '/', '', $file->getPathname());
-          foreach ($tool['lines'] as $relative_lines_file_name => $lines) {
+          foreach ($config['lines'] as $relative_lines_file_name => $lines) {
             if ($relative_file_path === $relative_lines_file_name) {
               foreach ($lines as $line) {
                 $content = File::removeLine($content, $line);
@@ -198,35 +244,42 @@ function (string $content, ContentFile $file) use ($tool): string {
         return $content;
       }
     );
-
-    File::removeTokenAsync('TOOL_' . strtoupper($name));
   }
 
-  protected function processGroup(string $name): void {
-    $config = self::getToolDefinitions('groups')[$name];
-    $selected_tools = $this->getResponseAsArray();
-
-    if (!isset($config['tools']) || array_intersect($config['tools'], $selected_tools)) {
-      return;
-    }
-
-    if (isset($config['files'])) {
-      $files = array_map(fn($file): string => $this->tmpDir . '/' . $file, $config['files']);
-      File::remove($files);
+  /**
+   * Apply the npm manifest edits declared by a tool or a group.
+   *
+   * @param array $config
+   *   Tool or group definition.
+   */
+  protected function processNpmManifests(array $config): void {
+    if (isset($config['package.json']) && is_callable($config['package.json'])) {
+      $this->updateNpmManifest($this->tmpDir . '/package.json', $config['package.json']);
     }
 
-    if (isset($config['ahoy'])) {
-      foreach ($config['ahoy'] as $string) {
-        File::replaceContentInFile($this->tmpDir . '/.ahoy.yml', Replacement::create('ahoy_tool', function (string $content) use ($string): string {
-          $content = File::replaceContent($content, $string, '');
-          return Yaml::collapseEmptyLinesInLiteralBlock($content);
-        }));
+    if (isset($config['theme.package.json']) && is_callable($config['theme.package.json'])) {
+      foreach ($this->themeManifests() as $manifest) {
+        $this->updateNpmManifest($manifest, $config['theme.package.json']);
       }
     }
+  }
 
-    if (isset($config['token'])) {
-      File::removeTokenAsync($config['token']);
-    }
+  protected function updateNpmManifest(string $manifest, callable $callback): void {
+    JsonManipulator::updateFile($manifest, $callback);
+
+    // A lock file that still lists the removed dependencies makes 'npm ci'
+    // abort on the first build.
+    NpmLock::sync($manifest);
+  }
+
+  /**
+   * Find the manifests of the custom themes.
+   *
+   * @return array<int, string>
+   *   Paths to the "package.json" files.
+   */
+  protected function themeManifests(): array {
+    return glob($this->tmpDir . '/' . $this->webroot . '/themes/custom/*/package.json') ?: [];
   }
 
   public static function getToolDefinitions(string $filter = 'all'): array {
@@ -317,6 +370,24 @@ public static function getToolDefinitions(string $filter = 'all'): array {
           $pj->addSubNode('scripts', 'lint', 'npm run lint-css');
           $pj->addSubNode('scripts', 'lint-fix', 'npm run lint-fix-css');
         },
+        'theme.package.json' => function (JsonManipulator $pj): void {
+          $pj->removeSubNode('devDependencies', '@eslint/compat');
+          $pj->removeSubNode('devDependencies', '@eslint/js');
+          $pj->removeSubNode('devDependencies', 'eslint');
+          $pj->removeSubNode('devDependencies', 'eslint-config-prettier');
+          $pj->removeSubNode('devDependencies', 'eslint-plugin-import');
+          $pj->removeSubNode('devDependencies', 'eslint-plugin-jsdoc');
+          $pj->removeSubNode('devDependencies', 'eslint-plugin-no-jquery');
+          $pj->removeSubNode('devDependencies', 'eslint-plugin-prettier');
+          $pj->removeSubNode('devDependencies', 'eslint-plugin-yml');
+          $pj->removeSubNode('devDependencies', 'globals');
+          $pj->removeSubNode('devDependencies', 'prettier');
+          $pj->removeSubNode('devDependencies', '@homer0/prettier-plugin-jsdoc');
+          $pj->removeSubNode('scripts', 'lint-js');
+          $pj->removeSubNode('scripts', 'lint-js-fix');
+          $pj->addSubNode('scripts', 'lint', 'npm run lint-css');
+          $pj->addSubNode('scripts', 'lint-fix', 'npm run lint-css-fix');
+        },
         // A project created before the move to flat config still carries the
         // legacy files, which linger unread once the tool is deselected.
         'files' => ['eslint.config.mjs', '.eslintrc.json', '.eslintignore', '.prettierrc.json', '.prettierignore'],
@@ -335,6 +406,17 @@ public static function getToolDefinitions(string $filter = 'all'): array {
           $pj->addSubNode('scripts', 'lint', 'npm run lint-js');
           $pj->addSubNode('scripts', 'lint-fix', 'npm run lint-fix-js');
         },
+        'theme.package.json' => function (JsonManipulator $pj): void {
+          $pj->removeSubNode('devDependencies', 'stylelint');
+          $pj->removeSubNode('devDependencies', 'stylelint-config-standard');
+          $pj->removeSubNode('devDependencies', 'stylelint-config-standard-scss');
+          $pj->removeSubNode('devDependencies', 'stylelint-order');
+          $pj->removeSubNode('devDependencies', 'stylelint-scss');
+          $pj->removeSubNode('scripts', 'lint-css');
+          $pj->removeSubNode('scripts', 'lint-css-fix');
+          $pj->addSubNode('scripts', 'lint', 'npm run lint-js');
+          $pj->addSubNode('scripts', 'lint-fix', 'npm run lint-js-fix');
+        },
         'files' => ['.stylelintrc.js'],
       ],
 
@@ -500,9 +582,25 @@ public static function getToolDefinitions(string $filter = 'all'): array {
       ],
       'frontend_linting' => [
         'tools' => [self::ESLINT, self::STYLELINT],
+        // Each linter rewrites 'lint' to call the other one, so with both
+        // deselected the pair points at scripts that no longer exist.
+        'package.json' => function (JsonManipulator $pj): void {
+          $pj->removeSubNode('scripts', 'lint');
+          $pj->removeSubNode('scripts', 'lint-fix');
+        },
+        'theme.package.json' => function (JsonManipulator $pj): void {
+          $pj->removeSubNode('scripts', 'lint');
+          $pj->removeSubNode('scripts', 'lint-fix');
+        },
         'ahoy' => [
           '/^\h*ahoy cli "npm run lint"\h*\n?/m',
           '/^\h*ahoy cli "npm run lint-fix"\h*\n?/m',
+          'ahoy cli "npm run --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} lint"',
+          'ahoy cli "npm run --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} lint-fix"',
+        ],
+        'strings' => [
+          '/^\|\h*`npm run lint`.*\n?/m',
+          '/^\|\h*`npm run lint-fix`.*\n?/m',
         ],
         'token' => 'TOOL_ESLINT_STYLELINT',
       ],
diff --git a/.vortex/installer/src/Utils/NpmLock.php b/.vortex/installer/src/Utils/NpmLock.php
new file mode 100644
index 0000000000..f023b3df78
--- /dev/null
+++ b/.vortex/installer/src/Utils/NpmLock.php
@@ -0,0 +1,209 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DrevOps\VortexInstaller\Utils;
+
+/**
+ * Reconcile an npm lock file with the manifest next to it.
+ */
+class NpmLock {
+
+  /**
+   * Name of the lock file sitting next to a manifest.
+   */
+  const FILE = 'package-lock.json';
+
+  /**
+   * Manifest keys that declare edges to other packages.
+   */
+  const BLOCKS = [
+    'dependencies',
+    'devDependencies',
+    'optionalDependencies',
+    'peerDependencies',
+  ];
+
+  /**
+   * Bring the lock file next to a manifest back in line with it.
+   *
+   * The lock's root entry is reconciled with the manifest's dependency blocks
+   * and every package no longer reachable from a root is dropped.
+   *
+   * @param string $manifest_file
+   *   Path to the "package.json" file.
+   *
+   * @throws \RuntimeException
+   *   If either file holds invalid JSON, if a manifest dependency block is not
+   *   a JSON object, if the lock file carries no "packages" map, or if the lock
+   *   file cannot be written back.
+   */
+  public static function sync(string $manifest_file): void {
+    $lock_file = dirname($manifest_file) . DIRECTORY_SEPARATOR . self::FILE;
+
+    if (!is_file($lock_file)) {
+      return;
+    }
+
+    $manifest = self::read($manifest_file);
+    $lock = self::read($lock_file);
+
+    if (!isset($lock->packages) || !isset($lock->packages->{''})) {
+      throw new \RuntimeException(sprintf('Unsupported lock file format at "%s": a "packages" entry is required.', $lock_file));
+    }
+
+    self::reconcileRoot($manifest, $lock->packages->{''}, $manifest_file);
+    self::prune($lock->packages);
+
+    self::write($lock_file, $lock);
+  }
+
+  /**
+   * Copy the manifest's dependency blocks onto the lock's root entry.
+   */
+  protected static function reconcileRoot(\stdClass $manifest, \stdClass $root, string $manifest_file): void {
+    foreach (self::BLOCKS as $block) {
+      if (!isset($manifest->{$block})) {
+        unset($root->{$block});
+
+        continue;
+      }
+
+      if (!$manifest->{$block} instanceof \stdClass) {
+        throw new \RuntimeException(sprintf('Unable to read the "%s" block of "%s": a JSON object is required.', $block, $manifest_file));
+      }
+
+      $root->{$block} = clone $manifest->{$block};
+    }
+  }
+
+  /**
+   * Remove installed packages that no roots reach any more.
+   */
+  protected static function prune(\stdClass $packages): void {
+    $paths = array_keys(get_object_vars($packages));
+    $queue = array_values(array_filter($paths, fn(string $path): bool => !str_starts_with($path, 'node_modules/')));
+    $reachable = [];
+
+    while ($queue !== []) {
+      $path = array_shift($queue);
+
+      if (isset($reachable[$path])) {
+        continue;
+      }
+
+      $reachable[$path] = TRUE;
+
+      foreach (self::edges($packages->{$path}) as $name) {
+        $resolved = self::resolve($packages, $path, $name);
+
+        if ($resolved !== NULL) {
+          $queue[] = $resolved;
+        }
+      }
+    }
+
+    foreach ($paths as $path) {
+      if (!isset($reachable[$path])) {
+        unset($packages->{$path});
+      }
+    }
+  }
+
+  /**
+   * Collect the names a lock entry depends on.
+   *
+   * @return array<int, string>
+   *   Package names.
+   */
+  protected static function edges(\stdClass $entry): array {
+    $names = [];
+
+    foreach (self::BLOCKS as $block) {
+      if (isset($entry->{$block})) {
+        $names = array_merge($names, array_keys(get_object_vars($entry->{$block})));
+      }
+    }
+
+    return $names;
+  }
+
+  /**
+   * Find the entry that satisfies a name for a package at the given path.
+   *
+   * Node walks the "node_modules" directories from the requiring package
+   * outwards, so the innermost copy wins over a hoisted one.
+   *
+   * @return string|null
+   *   The path of the satisfying entry, or NULL when the tree has none.
+   */
+  protected static function resolve(\stdClass $packages, string $from, string $name): ?string {
+    $scope = $from;
+
+    while (TRUE) {
+      $candidate = ($scope === '' ? '' : $scope . '/') . 'node_modules/' . $name;
+
+      if (isset($packages->{$candidate})) {
+        return $candidate;
+      }
+
+      if ($scope === '') {
+        return NULL;
+      }
+
+      $position = strrpos($scope, '/node_modules/');
+      $scope = $position === FALSE ? '' : substr($scope, 0, $position);
+    }
+  }
+
+  /**
+   * Decode a JSON file into objects.
+   */
+  protected static function read(string $file): \stdClass {
+    $contents = file_get_contents($file);
+
+    if ($contents === FALSE) {
+      // @codeCoverageIgnoreStart
+      throw new \RuntimeException(sprintf('Unable to read a JSON file at "%s".', $file));
+      // @codeCoverageIgnoreEnd
+    }
+
+    try {
+      $decoded = json_decode($contents, FALSE, 512, JSON_THROW_ON_ERROR);
+    }
+    catch (\JsonException $exception) {
+      throw new \RuntimeException(sprintf('Unable to parse a JSON file at "%s": %s', $file, $exception->getMessage()), $exception->getCode(), $exception);
+    }
+
+    if (!$decoded instanceof \stdClass) {
+      throw new \RuntimeException(sprintf('Unable to parse a JSON file at "%s": a JSON object is required.', $file));
+    }
+
+    return $decoded;
+  }
+
+  /**
+   * Write a JSON file the way npm writes it.
+   */
+  protected static function write(string $file, \stdClass $data): void {
+    $json = json_encode($data, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE | JSON_THROW_ON_ERROR);
+
+    // Two-space indentation matches what npm writes; PHP indents with four. A
+    // JSON string cannot hold a raw newline, so a leading run of spaces is
+    // always indentation.
+    $json = preg_replace_callback('/^ +/m', fn(array $matches): string => str_repeat(' ', intdiv(strlen($matches[0]), 2)), $json);
+
+    if ($json === NULL) {
+      // @codeCoverageIgnoreStart
+      throw new \RuntimeException(sprintf('Unable to format a JSON file at "%s".', $file));
+      // @codeCoverageIgnoreEnd
+    }
+
+    $json .= "\n";
+
+    if (!is_writable($file) || file_put_contents($file, $json) !== strlen($json)) {
+      throw new \RuntimeException(sprintf('Unable to write a JSON file at "%s".', $file));
+    }
+  }
+
+}
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint/.ahoy.yml b/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint/.ahoy.yml
index 1471846975..b569385e32 100644
--- a/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint/.ahoy.yml
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint/.ahoy.yml
@@ -1,20 +1,22 @@
-@@ -207,7 +207,6 @@
+@@ -207,8 +207,6 @@
      usage: Lint front-end code.
      cmd: |
        ahoy cli vendor/bin/twig-cs-fixer lint
 -      ahoy cli "npm run lint"
-       ahoy cli "npm run --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} lint"
+-      ahoy cli "npm run --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} lint"
  
    lint-tests:
-@@ -239,7 +238,6 @@
+     usage: Lint tests code.
+@@ -239,8 +237,6 @@
      usage: Fix lint issues of front-end code.
      cmd: |
        ahoy cli vendor/bin/twig-cs-fixer lint --fix
 -      ahoy cli "npm run lint-fix"
-       ahoy cli "npm run --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} lint-fix"
+-      ahoy cli "npm run --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} lint-fix"
  
    test:
-@@ -262,10 +260,6 @@
+     usage: Run all PHPUnit tests.
+@@ -262,10 +258,6 @@
    test-functional-javascript:
      usage: Run PHPUnit functional JavaScript tests.
      cmd: ahoy cli vendor/bin/phpunit --testsuite=functional-javascript "$@"
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint/.github/workflows/build-test-deploy.yml b/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint/.github/workflows/build-test-deploy.yml
index 634f265837..452179b6d7 100644
--- a/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint/.github/workflows/build-test-deploy.yml
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint/.github/workflows/build-test-deploy.yml
@@ -6,7 +6,7 @@
  
        - name: Validate Composer configuration is normalized
          run: docker compose exec -T cli composer normalize --dry-run
-@@ -158,10 +157,6 @@
+@@ -158,15 +157,6 @@
          run: docker compose exec -T cli vendor/bin/gherkinlint lint tests/behat/features
          continue-on-error: ${{ vars.VORTEX_CI_GHERKIN_LINT_IGNORE_FAILURE == '1' }}
  
@@ -14,10 +14,15 @@
 -        run: docker compose exec -T cli bash -c "npm run lint"
 -        continue-on-error: ${{ vars.VORTEX_CI_NODEJS_LINT_IGNORE_FAILURE == '1' }}
 -
-       - name: Lint theme code with NodeJS linters
-         if: ${{ vars.VORTEX_FRONTEND_BUILD_SKIP != '1' }}
-         run: docker compose exec -T cli bash -c "npm --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} run lint"
-@@ -310,7 +305,6 @@
+-      - name: Lint theme code with NodeJS linters
+-        if: ${{ vars.VORTEX_FRONTEND_BUILD_SKIP != '1' }}
+-        run: docker compose exec -T cli bash -c "npm --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} run lint"
+-        continue-on-error: ${{ vars.VORTEX_CI_NODEJS_LINT_IGNORE_FAILURE == '1' }}
+-
+   database:
+     runs-on: ubuntu-latest
+     if: ${{ !inputs.deploy_target && (github.event_name == 'push' || !startsWith(github.head_ref, 'project/')) }}
+@@ -310,7 +300,6 @@
        # https://www.vortextemplate.com/docs/continuous-integration#test-parallelism
        VORTEX_CI_RUNNER_INDEX: ${{ strategy.job-index }}
        VORTEX_CI_RUNNER_TOTAL: ${{ strategy.job-total }}
@@ -25,7 +30,7 @@
        VORTEX_CI_IS_PHPUNIT_RUNNER: ${{ matrix.instance == 0 || strategy.job-total == 1 }}
        VORTEX_CI_IS_SDC_DEVEL_RUNNER: ${{ matrix.instance == 0 || strategy.job-total == 1 }}
        # Runs on every instance, using the `p<instance index - offset>` profile.
-@@ -421,7 +415,6 @@
+@@ -421,7 +410,6 @@
            docker compose exec $(env | cut -f1 -d= | sed 's/^/-e /') -T cli bash -c " \
              if [ -n \"\${PACKAGE_TOKEN:-}\" ]; then composer config --global --auth github-oauth.github.com \"\${PACKAGE_TOKEN}\"; fi && \
              COMPOSER_MEMORY_LIMIT=-1 composer --ansi install --prefer-dist"
@@ -33,7 +38,7 @@
  
        - name: Provision site
          run: |
-@@ -434,11 +427,6 @@
+@@ -434,11 +422,6 @@
            fi
            docker compose exec $(env | cut -f1 -d= | sed 's/^/-e /') -T cli ./vendor/bin/vortex-provision
          timeout-minutes: 30
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint/web/themes/custom/star_wars/README.md b/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint/web/themes/custom/star_wars/README.md
new file mode 100644
index 0000000000..3d20bae61b
--- /dev/null
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint/web/themes/custom/star_wars/README.md
@@ -0,0 +1,6 @@
+@@ -20,5 +20,3 @@
+ | `npm run build`     | Production build (minified, no source maps)    |
+ | `npm run build-dev` | Development build (expanded, with source maps) |
+ | `npm run watch`     | Watch for changes and rebuild automatically    |
+-| `npm run lint`      | Check code style (JS and SCSS)                 |
+-| `npm run lint-fix`  | Fix code style issues automatically            |
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint/web/themes/custom/star_wars/package.json b/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint/web/themes/custom/star_wars/package.json
new file mode 100644
index 0000000000..1fc10ca089
--- /dev/null
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint/web/themes/custom/star_wars/package.json
@@ -0,0 +1,43 @@
+@@ -4,29 +4,12 @@
+   "private": true,
+   "description": "NodeJS dependencies for star wars project",
+   "devDependencies": {
+-    "@eslint/compat": "__VERSION__",
+-    "@eslint/js": "__VERSION__",
+-    "@homer0/prettier-plugin-jsdoc": "__VERSION__",
+     "autoprefixer": "__VERSION__",
+     "chokidar-cli": "__VERSION__",
+-    "eslint": "__VERSION__",
+-    "eslint-config-prettier": "__VERSION__",
+-    "eslint-plugin-import": "__VERSION__",
+-    "eslint-plugin-jsdoc": "__VERSION__",
+-    "eslint-plugin-no-jquery": "__VERSION__",
+-    "eslint-plugin-prettier": "__VERSION__",
+-    "eslint-plugin-yml": "__VERSION__",
+-    "globals": "__VERSION__",
+     "patch-package": "__VERSION__",
+     "postcss": "__VERSION__",
+     "postcss-cli": "__VERSION__",
+-    "prettier": "__VERSION__",
+     "sass": "__VERSION__",
+-    "stylelint": "__VERSION__",
+-    "stylelint-config-standard": "__VERSION__",
+-    "stylelint-config-standard-scss": "__VERSION__",
+-    "stylelint-order": "__VERSION__",
+-    "stylelint-scss": "__VERSION__",
+     "terser": "__VERSION__"
+   },
+   "browserslist": [
+@@ -42,12 +25,6 @@
+     "copy": "npm run copy:images && npm run copy:fonts",
+     "copy:fonts": "mkdir -p build/fonts && cp -r fonts/* build/fonts/ 2>/dev/null || true",
+     "copy:images": "mkdir -p build/images && cp -r images/* build/images/ 2>/dev/null || true",
+-    "lint": "npm run lint-js && npm run lint-css",
+-    "lint-css": "stylelint 'scss/**/*.scss'",
+-    "lint-css-fix": "stylelint 'scss/**/*.scss' --fix",
+-    "lint-fix": "npm run lint-js-fix && npm run lint-css-fix",
+-    "lint-js": "eslint 'js/**/*.js' --ignore-pattern '*.min.js'",
+-    "lint-js-fix": "eslint 'js/**/*.js' --ignore-pattern '*.min.js' --fix",
+     "postcss:dev": "postcss build/css/star_wars.min.css -o build/css/star_wars.min.css --map",
+     "postcss:prod": "postcss build/css/star_wars.min.css -o build/css/star_wars.min.css --no-map",
+     "postinstall": "patch-package",
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint_circleci/.ahoy.yml b/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint_circleci/.ahoy.yml
index 1471846975..b569385e32 100644
--- a/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint_circleci/.ahoy.yml
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint_circleci/.ahoy.yml
@@ -1,20 +1,22 @@
-@@ -207,7 +207,6 @@
+@@ -207,8 +207,6 @@
      usage: Lint front-end code.
      cmd: |
        ahoy cli vendor/bin/twig-cs-fixer lint
 -      ahoy cli "npm run lint"
-       ahoy cli "npm run --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} lint"
+-      ahoy cli "npm run --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} lint"
  
    lint-tests:
-@@ -239,7 +238,6 @@
+     usage: Lint tests code.
+@@ -239,8 +237,6 @@
      usage: Fix lint issues of front-end code.
      cmd: |
        ahoy cli vendor/bin/twig-cs-fixer lint --fix
 -      ahoy cli "npm run lint-fix"
-       ahoy cli "npm run --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} lint-fix"
+-      ahoy cli "npm run --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} lint-fix"
  
    test:
-@@ -262,10 +260,6 @@
+     usage: Run all PHPUnit tests.
+@@ -262,10 +258,6 @@
    test-functional-javascript:
      usage: Run PHPUnit functional JavaScript tests.
      cmd: ahoy cli vendor/bin/phpunit --testsuite=functional-javascript "$@"
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint_circleci/.circleci/config.yml b/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint_circleci/.circleci/config.yml
index 29f3b1ee0d..79680d0552 100644
--- a/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint_circleci/.circleci/config.yml
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint_circleci/.circleci/config.yml
@@ -166,12 +166,6 @@ jobs:
           name: Lint code with Gherkin Lint
           command: docker compose exec -T cli vendor/bin/gherkinlint lint tests/behat/features || [ "${VORTEX_CI_GHERKIN_LINT_IGNORE_FAILURE:-0}" -eq 1 ]
 
-      - run:
-          name: Lint theme code with NodeJS linters
-          command: |
-            [ "${VORTEX_FRONTEND_BUILD_SKIP:-0}" -eq 1 ] && exit 0
-            docker compose exec -T cli bash -c "npm --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} run lint" || [ "${VORTEX_CI_NODEJS_LINT_IGNORE_FAILURE:-0}" -eq 1 ]
-
   # Audit job runs in its own workflow, independently of the commit workflow.
   audit:
     <<: *runner_config
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint_circleci/web/themes/custom/star_wars/README.md b/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint_circleci/web/themes/custom/star_wars/README.md
new file mode 100644
index 0000000000..3d20bae61b
--- /dev/null
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint_circleci/web/themes/custom/star_wars/README.md
@@ -0,0 +1,6 @@
+@@ -20,5 +20,3 @@
+ | `npm run build`     | Production build (minified, no source maps)    |
+ | `npm run build-dev` | Development build (expanded, with source maps) |
+ | `npm run watch`     | Watch for changes and rebuild automatically    |
+-| `npm run lint`      | Check code style (JS and SCSS)                 |
+-| `npm run lint-fix`  | Fix code style issues automatically            |
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint_circleci/web/themes/custom/star_wars/package.json b/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint_circleci/web/themes/custom/star_wars/package.json
new file mode 100644
index 0000000000..1fc10ca089
--- /dev/null
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_groups_no_fe_lint_circleci/web/themes/custom/star_wars/package.json
@@ -0,0 +1,43 @@
+@@ -4,29 +4,12 @@
+   "private": true,
+   "description": "NodeJS dependencies for star wars project",
+   "devDependencies": {
+-    "@eslint/compat": "__VERSION__",
+-    "@eslint/js": "__VERSION__",
+-    "@homer0/prettier-plugin-jsdoc": "__VERSION__",
+     "autoprefixer": "__VERSION__",
+     "chokidar-cli": "__VERSION__",
+-    "eslint": "__VERSION__",
+-    "eslint-config-prettier": "__VERSION__",
+-    "eslint-plugin-import": "__VERSION__",
+-    "eslint-plugin-jsdoc": "__VERSION__",
+-    "eslint-plugin-no-jquery": "__VERSION__",
+-    "eslint-plugin-prettier": "__VERSION__",
+-    "eslint-plugin-yml": "__VERSION__",
+-    "globals": "__VERSION__",
+     "patch-package": "__VERSION__",
+     "postcss": "__VERSION__",
+     "postcss-cli": "__VERSION__",
+-    "prettier": "__VERSION__",
+     "sass": "__VERSION__",
+-    "stylelint": "__VERSION__",
+-    "stylelint-config-standard": "__VERSION__",
+-    "stylelint-config-standard-scss": "__VERSION__",
+-    "stylelint-order": "__VERSION__",
+-    "stylelint-scss": "__VERSION__",
+     "terser": "__VERSION__"
+   },
+   "browserslist": [
+@@ -42,12 +25,6 @@
+     "copy": "npm run copy:images && npm run copy:fonts",
+     "copy:fonts": "mkdir -p build/fonts && cp -r fonts/* build/fonts/ 2>/dev/null || true",
+     "copy:images": "mkdir -p build/images && cp -r images/* build/images/ 2>/dev/null || true",
+-    "lint": "npm run lint-js && npm run lint-css",
+-    "lint-css": "stylelint 'scss/**/*.scss'",
+-    "lint-css-fix": "stylelint 'scss/**/*.scss' --fix",
+-    "lint-fix": "npm run lint-js-fix && npm run lint-css-fix",
+-    "lint-js": "eslint 'js/**/*.js' --ignore-pattern '*.min.js'",
+-    "lint-js-fix": "eslint 'js/**/*.js' --ignore-pattern '*.min.js' --fix",
+     "postcss:dev": "postcss build/css/star_wars.min.css -o build/css/star_wars.min.css --map",
+     "postcss:prod": "postcss build/css/star_wars.min.css -o build/css/star_wars.min.css --no-map",
+     "postinstall": "patch-package",
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint/.github/workflows/build-test-deploy.yml b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint/.github/workflows/build-test-deploy.yml
index 5ff6756de7..9ff95c0bff 100644
--- a/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint/.github/workflows/build-test-deploy.yml
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint/.github/workflows/build-test-deploy.yml
@@ -6,14 +6,19 @@
  
        - name: Validate Composer configuration is normalized
          run: docker compose exec -T cli composer normalize --dry-run
-@@ -157,10 +156,6 @@
+@@ -157,15 +156,6 @@
        - name: Lint code with Gherkin Lint
          run: docker compose exec -T cli vendor/bin/gherkinlint lint tests/behat/features
          continue-on-error: ${{ vars.VORTEX_CI_GHERKIN_LINT_IGNORE_FAILURE == '1' }}
 -
 -      - name: Lint module code with NodeJS linters
 -        run: docker compose exec -T cli bash -c "npm run lint"
+-        continue-on-error: ${{ vars.VORTEX_CI_NODEJS_LINT_IGNORE_FAILURE == '1' }}
+-
+-      - name: Lint theme code with NodeJS linters
+-        if: ${{ vars.VORTEX_FRONTEND_BUILD_SKIP != '1' }}
+-        run: docker compose exec -T cli bash -c "npm --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} run lint"
 -        continue-on-error: ${{ vars.VORTEX_CI_NODEJS_LINT_IGNORE_FAILURE == '1' }}
  
-       - name: Lint theme code with NodeJS linters
-         if: ${{ vars.VORTEX_FRONTEND_BUILD_SKIP != '1' }}
+   database:
+     runs-on: ubuntu-latest
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint/web/themes/custom/star_wars/package.json b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint/web/themes/custom/star_wars/package.json
new file mode 100644
index 0000000000..89c2302583
--- /dev/null
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint/web/themes/custom/star_wars/package.json
@@ -0,0 +1,39 @@
+@@ -4,23 +4,11 @@
+   "private": true,
+   "description": "NodeJS dependencies for star wars project",
+   "devDependencies": {
+-    "@eslint/compat": "__VERSION__",
+-    "@eslint/js": "__VERSION__",
+-    "@homer0/prettier-plugin-jsdoc": "__VERSION__",
+     "autoprefixer": "__VERSION__",
+     "chokidar-cli": "__VERSION__",
+-    "eslint": "__VERSION__",
+-    "eslint-config-prettier": "__VERSION__",
+-    "eslint-plugin-import": "__VERSION__",
+-    "eslint-plugin-jsdoc": "__VERSION__",
+-    "eslint-plugin-no-jquery": "__VERSION__",
+-    "eslint-plugin-prettier": "__VERSION__",
+-    "eslint-plugin-yml": "__VERSION__",
+-    "globals": "__VERSION__",
+     "patch-package": "__VERSION__",
+     "postcss": "__VERSION__",
+     "postcss-cli": "__VERSION__",
+-    "prettier": "__VERSION__",
+     "sass": "__VERSION__",
+     "stylelint": "__VERSION__",
+     "stylelint-config-standard": "__VERSION__",
+@@ -42,12 +30,10 @@
+     "copy": "npm run copy:images && npm run copy:fonts",
+     "copy:fonts": "mkdir -p build/fonts && cp -r fonts/* build/fonts/ 2>/dev/null || true",
+     "copy:images": "mkdir -p build/images && cp -r images/* build/images/ 2>/dev/null || true",
+-    "lint": "npm run lint-js && npm run lint-css",
++    "lint": "npm run lint-css",
+     "lint-css": "stylelint 'scss/**/*.scss'",
+     "lint-css-fix": "stylelint 'scss/**/*.scss' --fix",
+-    "lint-fix": "npm run lint-js-fix && npm run lint-css-fix",
+-    "lint-js": "eslint 'js/**/*.js' --ignore-pattern '*.min.js'",
+-    "lint-js-fix": "eslint 'js/**/*.js' --ignore-pattern '*.min.js' --fix",
++    "lint-fix": "npm run lint-css-fix",
+     "postcss:dev": "postcss build/css/star_wars.min.css -o build/css/star_wars.min.css --map",
+     "postcss:prod": "postcss build/css/star_wars.min.css -o build/css/star_wars.min.css --no-map",
+     "postinstall": "patch-package",
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_circleci/.circleci/config.yml b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_circleci/.circleci/config.yml
index 79947bcdf8..0567b2d914 100644
--- a/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_circleci/.circleci/config.yml
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_circleci/.circleci/config.yml
@@ -166,12 +166,6 @@ jobs:
           name: Lint code with Gherkin Lint
           command: docker compose exec -T cli vendor/bin/gherkinlint lint tests/behat/features || [ "${VORTEX_CI_GHERKIN_LINT_IGNORE_FAILURE:-0}" -eq 1 ]
 
-      - run:
-          name: Lint theme code with NodeJS linters
-          command: |
-            [ "${VORTEX_FRONTEND_BUILD_SKIP:-0}" -eq 1 ] && exit 0
-            docker compose exec -T cli bash -c "npm --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} run lint" || [ "${VORTEX_CI_NODEJS_LINT_IGNORE_FAILURE:-0}" -eq 1 ]
-
   # Audit job runs in its own workflow, independently of the commit workflow.
   audit:
     <<: *runner_config
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_circleci/web/themes/custom/star_wars/package.json b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_circleci/web/themes/custom/star_wars/package.json
new file mode 100644
index 0000000000..89c2302583
--- /dev/null
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_circleci/web/themes/custom/star_wars/package.json
@@ -0,0 +1,39 @@
+@@ -4,23 +4,11 @@
+   "private": true,
+   "description": "NodeJS dependencies for star wars project",
+   "devDependencies": {
+-    "@eslint/compat": "__VERSION__",
+-    "@eslint/js": "__VERSION__",
+-    "@homer0/prettier-plugin-jsdoc": "__VERSION__",
+     "autoprefixer": "__VERSION__",
+     "chokidar-cli": "__VERSION__",
+-    "eslint": "__VERSION__",
+-    "eslint-config-prettier": "__VERSION__",
+-    "eslint-plugin-import": "__VERSION__",
+-    "eslint-plugin-jsdoc": "__VERSION__",
+-    "eslint-plugin-no-jquery": "__VERSION__",
+-    "eslint-plugin-prettier": "__VERSION__",
+-    "eslint-plugin-yml": "__VERSION__",
+-    "globals": "__VERSION__",
+     "patch-package": "__VERSION__",
+     "postcss": "__VERSION__",
+     "postcss-cli": "__VERSION__",
+-    "prettier": "__VERSION__",
+     "sass": "__VERSION__",
+     "stylelint": "__VERSION__",
+     "stylelint-config-standard": "__VERSION__",
+@@ -42,12 +30,10 @@
+     "copy": "npm run copy:images && npm run copy:fonts",
+     "copy:fonts": "mkdir -p build/fonts && cp -r fonts/* build/fonts/ 2>/dev/null || true",
+     "copy:images": "mkdir -p build/images && cp -r images/* build/images/ 2>/dev/null || true",
+-    "lint": "npm run lint-js && npm run lint-css",
++    "lint": "npm run lint-css",
+     "lint-css": "stylelint 'scss/**/*.scss'",
+     "lint-css-fix": "stylelint 'scss/**/*.scss' --fix",
+-    "lint-fix": "npm run lint-js-fix && npm run lint-css-fix",
+-    "lint-js": "eslint 'js/**/*.js' --ignore-pattern '*.min.js'",
+-    "lint-js-fix": "eslint 'js/**/*.js' --ignore-pattern '*.min.js' --fix",
++    "lint-fix": "npm run lint-css-fix",
+     "postcss:dev": "postcss build/css/star_wars.min.css -o build/css/star_wars.min.css --map",
+     "postcss:prod": "postcss build/css/star_wars.min.css -o build/css/star_wars.min.css --no-map",
+     "postinstall": "patch-package",
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/-.prettierignore b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/-.prettierignore
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/-.prettierrc.json b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/-.prettierrc.json
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/-.stylelintrc.js b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/-.stylelintrc.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/-eslint.config.mjs b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/-eslint.config.mjs
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/.ahoy.yml b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/.ahoy.yml
new file mode 100644
index 0000000000..f2af61a6c3
--- /dev/null
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/.ahoy.yml
@@ -0,0 +1,18 @@
+@@ -207,8 +207,6 @@
+     usage: Lint front-end code.
+     cmd: |
+       ahoy cli vendor/bin/twig-cs-fixer lint
+-      ahoy cli "npm run lint"
+-      ahoy cli "npm run --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} lint"
+ 
+   lint-tests:
+     usage: Lint tests code.
+@@ -239,8 +237,6 @@
+     usage: Fix lint issues of front-end code.
+     cmd: |
+       ahoy cli vendor/bin/twig-cs-fixer lint --fix
+-      ahoy cli "npm run lint-fix"
+-      ahoy cli "npm run --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} lint-fix"
+ 
+   test:
+     usage: Run all PHPUnit tests.
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/.github/workflows/build-test-deploy.yml b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/.github/workflows/build-test-deploy.yml
new file mode 100644
index 0000000000..9ff95c0bff
--- /dev/null
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/.github/workflows/build-test-deploy.yml
@@ -0,0 +1,24 @@
+@@ -132,7 +132,6 @@
+           docker compose exec $(env | cut -f1 -d= | sed 's/^/-e /') -T cli bash -c " \
+             if [ -n \"\${PACKAGE_TOKEN:-}\" ]; then composer config --global --auth github-oauth.github.com \"\${PACKAGE_TOKEN}\"; fi && \
+             COMPOSER_MEMORY_LIMIT=-1 composer --ansi install --prefer-dist"
+-          docker compose exec $(env | cut -f1 -d= | sed 's/^/-e /') -T cli bash -c "npm ci"
+ 
+       - name: Validate Composer configuration is normalized
+         run: docker compose exec -T cli composer normalize --dry-run
+@@ -157,15 +156,6 @@
+       - name: Lint code with Gherkin Lint
+         run: docker compose exec -T cli vendor/bin/gherkinlint lint tests/behat/features
+         continue-on-error: ${{ vars.VORTEX_CI_GHERKIN_LINT_IGNORE_FAILURE == '1' }}
+-
+-      - name: Lint module code with NodeJS linters
+-        run: docker compose exec -T cli bash -c "npm run lint"
+-        continue-on-error: ${{ vars.VORTEX_CI_NODEJS_LINT_IGNORE_FAILURE == '1' }}
+-
+-      - name: Lint theme code with NodeJS linters
+-        if: ${{ vars.VORTEX_FRONTEND_BUILD_SKIP != '1' }}
+-        run: docker compose exec -T cli bash -c "npm --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} run lint"
+-        continue-on-error: ${{ vars.VORTEX_CI_NODEJS_LINT_IGNORE_FAILURE == '1' }}
+ 
+   database:
+     runs-on: ubuntu-latest
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/package.json b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/package.json
new file mode 100644
index 0000000000..f7afc86c64
--- /dev/null
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/package.json
@@ -0,0 +1,34 @@
+@@ -8,32 +8,11 @@
+     "node": ">= __VERSION__"
+   },
+   "scripts": {
+-    "lint-js": "eslint web/modules/custom --max-warnings=0 --no-error-on-unmatched-pattern",
+-    "lint-css": "stylelint --allow-empty-input \"web/modules/custom/**/*.css\"",
+-    "lint": "npm run lint-js && npm run lint-css",
+-    "lint-fix-js": "eslint web/modules/custom --no-error-on-unmatched-pattern --fix",
+-    "lint-fix-css": "stylelint --allow-empty-input \"web/modules/custom/**/*.css\" --fix",
+-    "lint-fix": "npm run lint-fix-js && npm run lint-fix-css",
+     "test": "jest --coverage --passWithNoTests"
+   },
+   "devDependencies": {
+-    "@eslint/compat": "__VERSION__",
+-    "@eslint/js": "__VERSION__",
+-    "@homer0/prettier-plugin-jsdoc": "__VERSION__",
+     "jest": "__VERSION__",
+-    "jest-environment-jsdom": "__VERSION__",
+-    "eslint": "__VERSION__",
+-    "eslint-config-prettier": "__VERSION__",
+-    "eslint-plugin-import": "__VERSION__",
+-    "eslint-plugin-jsdoc": "__VERSION__",
+-    "eslint-plugin-no-jquery": "__VERSION__",
+-    "eslint-plugin-prettier": "__VERSION__",
+-    "eslint-plugin-yml": "__VERSION__",
+-    "globals": "__VERSION__",
+-    "prettier": "__VERSION__",
+-    "stylelint": "__VERSION__",
+-    "stylelint-config-standard": "__VERSION__",
+-    "stylelint-order": "__VERSION__"
++    "jest-environment-jsdom": "__VERSION__"
+   },
+   "overrides": {
+     "test-exclude": "__VERSION__",
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/web/themes/custom/star_wars/README.md b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/web/themes/custom/star_wars/README.md
new file mode 100644
index 0000000000..3d20bae61b
--- /dev/null
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/web/themes/custom/star_wars/README.md
@@ -0,0 +1,6 @@
+@@ -20,5 +20,3 @@
+ | `npm run build`     | Production build (minified, no source maps)    |
+ | `npm run build-dev` | Development build (expanded, with source maps) |
+ | `npm run watch`     | Watch for changes and rebuild automatically    |
+-| `npm run lint`      | Check code style (JS and SCSS)                 |
+-| `npm run lint-fix`  | Fix code style issues automatically            |
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/web/themes/custom/star_wars/package.json b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/web/themes/custom/star_wars/package.json
new file mode 100644
index 0000000000..1fc10ca089
--- /dev/null
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_no_eslint_no_stylelint/web/themes/custom/star_wars/package.json
@@ -0,0 +1,43 @@
+@@ -4,29 +4,12 @@
+   "private": true,
+   "description": "NodeJS dependencies for star wars project",
+   "devDependencies": {
+-    "@eslint/compat": "__VERSION__",
+-    "@eslint/js": "__VERSION__",
+-    "@homer0/prettier-plugin-jsdoc": "__VERSION__",
+     "autoprefixer": "__VERSION__",
+     "chokidar-cli": "__VERSION__",
+-    "eslint": "__VERSION__",
+-    "eslint-config-prettier": "__VERSION__",
+-    "eslint-plugin-import": "__VERSION__",
+-    "eslint-plugin-jsdoc": "__VERSION__",
+-    "eslint-plugin-no-jquery": "__VERSION__",
+-    "eslint-plugin-prettier": "__VERSION__",
+-    "eslint-plugin-yml": "__VERSION__",
+-    "globals": "__VERSION__",
+     "patch-package": "__VERSION__",
+     "postcss": "__VERSION__",
+     "postcss-cli": "__VERSION__",
+-    "prettier": "__VERSION__",
+     "sass": "__VERSION__",
+-    "stylelint": "__VERSION__",
+-    "stylelint-config-standard": "__VERSION__",
+-    "stylelint-config-standard-scss": "__VERSION__",
+-    "stylelint-order": "__VERSION__",
+-    "stylelint-scss": "__VERSION__",
+     "terser": "__VERSION__"
+   },
+   "browserslist": [
+@@ -42,12 +25,6 @@
+     "copy": "npm run copy:images && npm run copy:fonts",
+     "copy:fonts": "mkdir -p build/fonts && cp -r fonts/* build/fonts/ 2>/dev/null || true",
+     "copy:images": "mkdir -p build/images && cp -r images/* build/images/ 2>/dev/null || true",
+-    "lint": "npm run lint-js && npm run lint-css",
+-    "lint-css": "stylelint 'scss/**/*.scss'",
+-    "lint-css-fix": "stylelint 'scss/**/*.scss' --fix",
+-    "lint-fix": "npm run lint-js-fix && npm run lint-css-fix",
+-    "lint-js": "eslint 'js/**/*.js' --ignore-pattern '*.min.js'",
+-    "lint-js-fix": "eslint 'js/**/*.js' --ignore-pattern '*.min.js' --fix",
+     "postcss:dev": "postcss build/css/star_wars.min.css -o build/css/star_wars.min.css --map",
+     "postcss:prod": "postcss build/css/star_wars.min.css -o build/css/star_wars.min.css --no-map",
+     "postinstall": "patch-package",
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_no_stylelint/web/themes/custom/star_wars/package.json b/.vortex/installer/tests/Fixtures/handler_process/tools_no_stylelint/web/themes/custom/star_wars/package.json
new file mode 100644
index 0000000000..04445b1033
--- /dev/null
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_no_stylelint/web/themes/custom/star_wars/package.json
@@ -0,0 +1,25 @@
+@@ -22,11 +22,6 @@
+     "postcss-cli": "__VERSION__",
+     "prettier": "__VERSION__",
+     "sass": "__VERSION__",
+-    "stylelint": "__VERSION__",
+-    "stylelint-config-standard": "__VERSION__",
+-    "stylelint-config-standard-scss": "__VERSION__",
+-    "stylelint-order": "__VERSION__",
+-    "stylelint-scss": "__VERSION__",
+     "terser": "__VERSION__"
+   },
+   "browserslist": [
+@@ -42,10 +37,8 @@
+     "copy": "npm run copy:images && npm run copy:fonts",
+     "copy:fonts": "mkdir -p build/fonts && cp -r fonts/* build/fonts/ 2>/dev/null || true",
+     "copy:images": "mkdir -p build/images && cp -r images/* build/images/ 2>/dev/null || true",
+-    "lint": "npm run lint-js && npm run lint-css",
+-    "lint-css": "stylelint 'scss/**/*.scss'",
+-    "lint-css-fix": "stylelint 'scss/**/*.scss' --fix",
+-    "lint-fix": "npm run lint-js-fix && npm run lint-css-fix",
++    "lint": "npm run lint-js",
++    "lint-fix": "npm run lint-js-fix",
+     "lint-js": "eslint 'js/**/*.js' --ignore-pattern '*.min.js'",
+     "lint-js-fix": "eslint 'js/**/*.js' --ignore-pattern '*.min.js' --fix",
+     "postcss:dev": "postcss build/css/star_wars.min.css -o build/css/star_wars.min.css --map",
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_no_stylelint_circleci/web/themes/custom/star_wars/package.json b/.vortex/installer/tests/Fixtures/handler_process/tools_no_stylelint_circleci/web/themes/custom/star_wars/package.json
new file mode 100644
index 0000000000..04445b1033
--- /dev/null
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_no_stylelint_circleci/web/themes/custom/star_wars/package.json
@@ -0,0 +1,25 @@
+@@ -22,11 +22,6 @@
+     "postcss-cli": "__VERSION__",
+     "prettier": "__VERSION__",
+     "sass": "__VERSION__",
+-    "stylelint": "__VERSION__",
+-    "stylelint-config-standard": "__VERSION__",
+-    "stylelint-config-standard-scss": "__VERSION__",
+-    "stylelint-order": "__VERSION__",
+-    "stylelint-scss": "__VERSION__",
+     "terser": "__VERSION__"
+   },
+   "browserslist": [
+@@ -42,10 +37,8 @@
+     "copy": "npm run copy:images && npm run copy:fonts",
+     "copy:fonts": "mkdir -p build/fonts && cp -r fonts/* build/fonts/ 2>/dev/null || true",
+     "copy:images": "mkdir -p build/images && cp -r images/* build/images/ 2>/dev/null || true",
+-    "lint": "npm run lint-js && npm run lint-css",
+-    "lint-css": "stylelint 'scss/**/*.scss'",
+-    "lint-css-fix": "stylelint 'scss/**/*.scss' --fix",
+-    "lint-fix": "npm run lint-js-fix && npm run lint-css-fix",
++    "lint": "npm run lint-js",
++    "lint-fix": "npm run lint-js-fix",
+     "lint-js": "eslint 'js/**/*.js' --ignore-pattern '*.min.js'",
+     "lint-js-fix": "eslint 'js/**/*.js' --ignore-pattern '*.min.js' --fix",
+     "postcss:dev": "postcss build/css/star_wars.min.css -o build/css/star_wars.min.css --map",
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_none/.ahoy.yml b/.vortex/installer/tests/Fixtures/handler_process/tools_none/.ahoy.yml
index 7bc2ffa568..43f2735563 100644
--- a/.vortex/installer/tests/Fixtures/handler_process/tools_none/.ahoy.yml
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_none/.ahoy.yml
@@ -1,4 +1,4 @@
-@@ -192,29 +192,13 @@
+@@ -192,29 +192,11 @@
    lint:
      usage: Lint back-end and front-end code.
      cmd: |
@@ -18,8 +18,8 @@
      cmd: |
 -      ahoy cli vendor/bin/twig-cs-fixer lint
 -      ahoy cli "npm run lint"
-       ahoy cli "npm run --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} lint"
- 
+-      ahoy cli "npm run --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} lint"
+-
 -  lint-tests:
 -    usage: Lint tests code.
 -    cmd: |
@@ -28,7 +28,7 @@
    lint-sdc:
      usage: Validate Single Directory Components (requires a provisioned site).
      cmd: |
-@@ -226,51 +210,12 @@
+@@ -226,52 +208,11 @@
    lint-fix:
      usage: Fix lint issues of back-end and front-end code.
      cmd: |
@@ -46,7 +46,7 @@
      cmd: |
 -      ahoy cli vendor/bin/twig-cs-fixer lint --fix
 -      ahoy cli "npm run lint-fix"
-       ahoy cli "npm run --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} lint-fix"
+-      ahoy cli "npm run --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} lint-fix"
 -
 -  test:
 -    usage: Run all PHPUnit tests.
@@ -77,6 +77,7 @@
 -    usage: Run BDD tests.
 -    aliases: [test-behat]
 -    cmd: ahoy cli php -d memory_limit=-1 vendor/bin/behat --colors "$@"
- 
+-
    debug:
      usage: Enable PHP Xdebug.
+     aliases: [xdebug]
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_none/.github/workflows/build-test-deploy.yml b/.vortex/installer/tests/Fixtures/handler_process/tools_none/.github/workflows/build-test-deploy.yml
index 0e19289829..4ab2193e11 100644
--- a/.vortex/installer/tests/Fixtures/handler_process/tools_none/.github/workflows/build-test-deploy.yml
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_none/.github/workflows/build-test-deploy.yml
@@ -16,7 +16,7 @@
        - name: Build stack
          run: docker compose up --no-deps --detach cli
  
-@@ -132,36 +121,11 @@
+@@ -132,41 +121,11 @@
            docker compose exec $(env | cut -f1 -d= | sed 's/^/-e /') -T cli bash -c " \
              if [ -n \"\${PACKAGE_TOKEN:-}\" ]; then composer config --global --auth github-oauth.github.com \"\${PACKAGE_TOKEN}\"; fi && \
              COMPOSER_MEMORY_LIMIT=-1 composer --ansi install --prefer-dist"
@@ -50,10 +50,15 @@
 -        run: docker compose exec -T cli bash -c "npm run lint"
 -        continue-on-error: ${{ vars.VORTEX_CI_NODEJS_LINT_IGNORE_FAILURE == '1' }}
 -
-       - name: Lint theme code with NodeJS linters
-         if: ${{ vars.VORTEX_FRONTEND_BUILD_SKIP != '1' }}
-         run: docker compose exec -T cli bash -c "npm --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} run lint"
-@@ -310,15 +274,7 @@
+-      - name: Lint theme code with NodeJS linters
+-        if: ${{ vars.VORTEX_FRONTEND_BUILD_SKIP != '1' }}
+-        run: docker compose exec -T cli bash -c "npm --prefix=\${WEBROOT}/themes/custom/\${DRUPAL_THEME} run lint"
+-        continue-on-error: ${{ vars.VORTEX_CI_NODEJS_LINT_IGNORE_FAILURE == '1' }}
+-
+   database:
+     runs-on: ubuntu-latest
+     if: ${{ !inputs.deploy_target && (github.event_name == 'push' || !startsWith(github.head_ref, 'project/')) }}
+@@ -310,15 +269,7 @@
        # https://www.vortextemplate.com/docs/continuous-integration#test-parallelism
        VORTEX_CI_RUNNER_INDEX: ${{ strategy.job-index }}
        VORTEX_CI_RUNNER_TOTAL: ${{ strategy.job-total }}
@@ -69,7 +74,7 @@
  
      container:
        # https://hub.docker.com/r/drevops/ci-runner
-@@ -421,7 +377,6 @@
+@@ -421,7 +372,6 @@
            docker compose exec $(env | cut -f1 -d= | sed 's/^/-e /') -T cli bash -c " \
              if [ -n \"\${PACKAGE_TOKEN:-}\" ]; then composer config --global --auth github-oauth.github.com \"\${PACKAGE_TOKEN}\"; fi && \
              COMPOSER_MEMORY_LIMIT=-1 composer --ansi install --prefer-dist"
@@ -77,7 +82,7 @@
  
        - name: Provision site
          run: |
-@@ -435,71 +390,6 @@
+@@ -435,71 +385,6 @@
            docker compose exec $(env | cut -f1 -d= | sed 's/^/-e /') -T cli ./vendor/bin/vortex-provision
          timeout-minutes: 30
  
@@ -149,7 +154,7 @@
        - name: Validate Single Directory Components
          if: ${{ env.VORTEX_CI_IS_SDC_DEVEL_RUNNER == 'true' }}
          run: |
-@@ -512,19 +402,6 @@
+@@ -512,19 +397,6 @@
            fi
          continue-on-error: ${{ vars.VORTEX_CI_SDC_DEVEL_IGNORE_FAILURE == '1' }}
  
@@ -169,7 +174,7 @@
        - name: Process test logs and artifacts
          if: always()
          run: |
-@@ -541,16 +418,6 @@
+@@ -541,16 +413,6 @@
            path: .logs
            include-hidden-files: true
            if-no-files-found: error
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_none/web/themes/custom/star_wars/README.md b/.vortex/installer/tests/Fixtures/handler_process/tools_none/web/themes/custom/star_wars/README.md
new file mode 100644
index 0000000000..3d20bae61b
--- /dev/null
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_none/web/themes/custom/star_wars/README.md
@@ -0,0 +1,6 @@
+@@ -20,5 +20,3 @@
+ | `npm run build`     | Production build (minified, no source maps)    |
+ | `npm run build-dev` | Development build (expanded, with source maps) |
+ | `npm run watch`     | Watch for changes and rebuild automatically    |
+-| `npm run lint`      | Check code style (JS and SCSS)                 |
+-| `npm run lint-fix`  | Fix code style issues automatically            |
diff --git a/.vortex/installer/tests/Fixtures/handler_process/tools_none/web/themes/custom/star_wars/package.json b/.vortex/installer/tests/Fixtures/handler_process/tools_none/web/themes/custom/star_wars/package.json
new file mode 100644
index 0000000000..1fc10ca089
--- /dev/null
+++ b/.vortex/installer/tests/Fixtures/handler_process/tools_none/web/themes/custom/star_wars/package.json
@@ -0,0 +1,43 @@
+@@ -4,29 +4,12 @@
+   "private": true,
+   "description": "NodeJS dependencies for star wars project",
+   "devDependencies": {
+-    "@eslint/compat": "__VERSION__",
+-    "@eslint/js": "__VERSION__",
+-    "@homer0/prettier-plugin-jsdoc": "__VERSION__",
+     "autoprefixer": "__VERSION__",
+     "chokidar-cli": "__VERSION__",
+-    "eslint": "__VERSION__",
+-    "eslint-config-prettier": "__VERSION__",
+-    "eslint-plugin-import": "__VERSION__",
+-    "eslint-plugin-jsdoc": "__VERSION__",
+-    "eslint-plugin-no-jquery": "__VERSION__",
+-    "eslint-plugin-prettier": "__VERSION__",
+-    "eslint-plugin-yml": "__VERSION__",
+-    "globals": "__VERSION__",
+     "patch-package": "__VERSION__",
+     "postcss": "__VERSION__",
+     "postcss-cli": "__VERSION__",
+-    "prettier": "__VERSION__",
+     "sass": "__VERSION__",
+-    "stylelint": "__VERSION__",
+-    "stylelint-config-standard": "__VERSION__",
+-    "stylelint-config-standard-scss": "__VERSION__",
+-    "stylelint-order": "__VERSION__",
+-    "stylelint-scss": "__VERSION__",
+     "terser": "__VERSION__"
+   },
+   "browserslist": [
+@@ -42,12 +25,6 @@
+     "copy": "npm run copy:images && npm run copy:fonts",
+     "copy:fonts": "mkdir -p build/fonts && cp -r fonts/* build/fonts/ 2>/dev/null || true",
+     "copy:images": "mkdir -p build/images && cp -r images/* build/images/ 2>/dev/null || true",
+-    "lint": "npm run lint-js && npm run lint-css",
+-    "lint-css": "stylelint 'scss/**/*.scss'",
+-    "lint-css-fix": "stylelint 'scss/**/*.scss' --fix",
+-    "lint-fix": "npm run lint-js-fix && npm run lint-css-fix",
+-    "lint-js": "eslint 'js/**/*.js' --ignore-pattern '*.min.js'",
+-    "lint-js-fix": "eslint 'js/**/*.js' --ignore-pattern '*.min.js' --fix",
+     "postcss:dev": "postcss build/css/star_wars.min.css -o build/css/star_wars.min.css --map",
+     "postcss:prod": "postcss build/css/star_wars.min.css -o build/css/star_wars.min.css --no-map",
+     "postinstall": "patch-package",
diff --git a/.vortex/installer/tests/Functional/Prompts/Handlers/ToolsHandlerProcessTest.php b/.vortex/installer/tests/Functional/Prompts/Handlers/ToolsHandlerProcessTest.php
index 1309d523a1..08b80401cf 100644
--- a/.vortex/installer/tests/Functional/Prompts/Handlers/ToolsHandlerProcessTest.php
+++ b/.vortex/installer/tests/Functional/Prompts/Handlers/ToolsHandlerProcessTest.php
@@ -264,6 +264,18 @@ public static function dataProviderHandlerProcess(): \Iterator {
           $test->assertFileDoesNotExist(static::$sut . '/.prettierignore');
           $test->assertFileContainsString($pj, '"stylelint":');
           $test->assertFileExists(static::$sut . '/.stylelintrc.js');
+
+          $tpj = static::themeManifest();
+          $test->assertFileNotContainsString($tpj, '"eslint":');
+          $test->assertFileNotContainsString($tpj, '"prettier":');
+          $test->assertFileContainsString($tpj, '"stylelint":');
+
+          static::assertNpmPairIsInSync($pj);
+          static::assertNpmPairIsInSync($tpj);
+          static::assertNpmLockLacksPackages($pj, ['eslint', 'prettier']);
+          static::assertNpmLockLacksPackages($tpj, ['eslint', 'prettier']);
+          static::assertNpmLockHasPackages($pj, ['stylelint', 'jest']);
+          static::assertNpmLockHasPackages($tpj, ['stylelint', 'sass']);
       }),
     ];
     yield 'tools_no_eslint_circleci' => [
@@ -305,6 +317,55 @@ public static function dataProviderHandlerProcess(): \Iterator {
           $test->assertFileDoesNotExist(static::$sut . '/.stylelintrc.js');
           $test->assertFileContainsString($pj, '"eslint":');
           $test->assertFileExists(static::$sut . '/eslint.config.mjs');
+
+          $tpj = static::themeManifest();
+          $test->assertFileNotContainsString($tpj, '"stylelint":');
+          $test->assertFileNotContainsString($tpj, '"stylelint-scss":');
+          $test->assertFileContainsString($tpj, '"eslint":');
+
+          static::assertNpmPairIsInSync($pj);
+          static::assertNpmPairIsInSync($tpj);
+          static::assertNpmLockLacksPackages($pj, ['stylelint']);
+          static::assertNpmLockLacksPackages($tpj, ['stylelint', 'stylelint-scss']);
+          static::assertNpmLockHasPackages($pj, ['eslint', 'jest']);
+          static::assertNpmLockHasPackages($tpj, ['eslint', 'sass']);
+      }),
+    ];
+    yield 'tools_no_eslint_no_stylelint' => [
+      static::cw(function ($test): void {
+          $tools = array_keys(Tools::getToolDefinitions('tools'));
+          $test->prompts[Tools::id()] = array_values(array_diff($tools, [Tools::ESLINT, Tools::STYLELINT]));
+          $test->prompts[CiProvider::id()] = CiProvider::GITHUB_ACTIONS;
+      }),
+      static::cw(function (AbstractHandlerProcessTestCase $test): void {
+          $pj = static::$sut . '/package.json';
+          $tpj = static::themeManifest();
+
+          $test->assertFileNotContainsString($pj, '"eslint":');
+          $test->assertFileNotContainsString($pj, '"stylelint":');
+          $test->assertFileNotContainsString($pj, '"lint":');
+          $test->assertFileNotContainsString($pj, '"lint-fix":');
+          $test->assertFileContainsString($pj, '"jest":');
+
+          $test->assertFileNotContainsString($tpj, '"eslint":');
+          $test->assertFileNotContainsString($tpj, '"stylelint":');
+          $test->assertFileNotContainsString($tpj, '"lint":');
+          $test->assertFileNotContainsString($tpj, '"lint-fix":');
+          $test->assertFileContainsString($tpj, '"sass":');
+
+          $test->assertFileDoesNotExist(static::$sut . '/eslint.config.mjs');
+          $test->assertFileDoesNotExist(static::$sut . '/.stylelintrc.js');
+          $test->assertFileExists(static::$sut . '/jest.config.js');
+
+          static::assertNpmPairIsInSync($pj);
+          static::assertNpmPairIsInSync($tpj);
+          static::assertNpmLockLacksPackages($pj, ['eslint', 'stylelint']);
+          static::assertNpmLockLacksPackages($tpj, ['eslint', 'stylelint']);
+          static::assertNpmLockHasPackages($pj, ['jest']);
+          static::assertNpmLockHasPackages($tpj, ['sass']);
+
+          $test->assertSutContains(['npm ci']);
+          $test->assertSutNotContains(['npm run lint']);
       }),
     ];
     yield 'tools_no_stylelint_circleci' => [
@@ -433,6 +494,10 @@ public static function dataProviderHandlerProcess(): \Iterator {
           $test->assertFileDoesNotExist(static::$sut . '/jest.config.js');
           $test->assertFileContainsString($pj, '"eslint":');
           $test->assertFileContainsString($pj, '"stylelint":');
+
+          static::assertNpmPairIsInSync($pj);
+          static::assertNpmLockLacksPackages($pj, ['jest', 'jest-environment-jsdom']);
+          static::assertNpmLockHasPackages($pj, ['eslint', 'stylelint']);
       }),
     ];
     yield 'tools_no_jest_circleci' => [
@@ -610,4 +675,51 @@ public static function dataProviderHandlerProcess(): \Iterator {
     ];
   }
 
+  protected static function themeManifest(): string {
+    $manifests = glob(static::$sut . '/*/themes/custom/*/package.json') ?: [];
+    self::assertCount(1, $manifests, 'Expected a single custom theme manifest.');
+
+    return $manifests[0];
+  }
+
+  /**
+   * Assert that a manifest and its lock file declare the same dependencies.
+   *
+   * This is the condition 'npm ci' refuses to install without.
+   */
+  protected static function assertNpmPairIsInSync(string $manifest_file): void {
+    $manifest = static::readJson($manifest_file);
+    $root = static::readJson(dirname($manifest_file) . '/package-lock.json')['packages'][''];
+
+    foreach (['dependencies', 'devDependencies', 'optionalDependencies', 'peerDependencies'] as $block) {
+      self::assertSame(
+        $manifest[$block] ?? NULL,
+        $root[$block] ?? NULL,
+        sprintf('The "%s" block of "%s" does not match its lock file.', $block, $manifest_file)
+      );
+    }
+  }
+
+  protected static function assertNpmLockHasPackages(string $manifest_file, array $names): void {
+    $packages = static::readJson(dirname($manifest_file) . '/package-lock.json')['packages'];
+
+    foreach ($names as $name) {
+      self::assertArrayHasKey('node_modules/' . $name, $packages, sprintf('Package "%s" is missing from the lock file next to "%s".', $name, $manifest_file));
+    }
+  }
+
+  protected static function assertNpmLockLacksPackages(string $manifest_file, array $names): void {
+    $packages = static::readJson(dirname($manifest_file) . '/package-lock.json')['packages'];
+
+    foreach ($names as $name) {
+      self::assertArrayNotHasKey('node_modules/' . $name, $packages, sprintf('Package "%s" is still in the lock file next to "%s".', $name, $manifest_file));
+    }
+  }
+
+  protected static function readJson(string $file): array {
+    self::assertFileExists($file);
+
+    return (array) json_decode((string) file_get_contents($file), TRUE, 512, JSON_THROW_ON_ERROR);
+  }
+
 }
diff --git a/.vortex/installer/tests/Unit/Utils/NpmLockTest.php b/.vortex/installer/tests/Unit/Utils/NpmLockTest.php
new file mode 100644
index 0000000000..ecbdd5ac0e
--- /dev/null
+++ b/.vortex/installer/tests/Unit/Utils/NpmLockTest.php
@@ -0,0 +1,250 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DrevOps\VortexInstaller\Tests\Unit\Utils;
+
+use DrevOps\VortexInstaller\Tests\Unit\UnitTestCase;
+use DrevOps\VortexInstaller\Utils\File;
+use DrevOps\VortexInstaller\Utils\NpmLock;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\DataProvider;
+
+#[CoversClass(NpmLock::class)]
+class NpmLockTest extends UnitTestCase {
+
+  public function testSyncWithoutLockFile(): void {
+    $manifest_file = $this->createPair(['devDependencies' => ['keep' => '^1.0.0']], NULL);
+
+    NpmLock::sync($manifest_file);
+
+    $this->assertFileDoesNotExist(dirname($manifest_file) . '/package-lock.json');
+  }
+
+  #[DataProvider('dataProviderSync')]
+  public function testSync(array $manifest, array $lock, array $expected_root, array $expected_paths): void {
+    $manifest_file = $this->createPair($manifest, $lock);
+
+    NpmLock::sync($manifest_file);
+
+    $actual = $this->readLock($manifest_file);
+
+    $this->assertSame($expected_root, $actual['packages']['']);
+    $this->assertSame($expected_paths, array_keys($actual['packages']));
+  }
+
+  public static function dataProviderSync(): \Iterator {
+    yield 'dependency removed from the manifest is pruned with its orphans' => [
+      ['devDependencies' => ['keep' => '^1.0.0']],
+      [
+        'packages' => [
+          '' => ['name' => 'test', 'devDependencies' => ['keep' => '^1.0.0', 'drop' => '^2.0.0']],
+          'node_modules/deep-orphan' => ['version' => '1.0.0'],
+          'node_modules/drop' => ['version' => '2.0.0', 'dependencies' => ['orphan' => '^1.0.0', 'shared' => '^1.0.0']],
+          'node_modules/drop/node_modules/nested' => ['version' => '1.0.0'],
+          'node_modules/keep' => ['version' => '1.0.0', 'dependencies' => ['shared' => '^1.0.0']],
+          'node_modules/orphan' => ['version' => '1.0.0', 'dependencies' => ['deep-orphan' => '^1.0.0']],
+          'node_modules/shared' => ['version' => '1.0.0'],
+        ],
+      ],
+      ['name' => 'test', 'devDependencies' => ['keep' => '^1.0.0']],
+      ['', 'node_modules/keep', 'node_modules/shared'],
+    ];
+    yield 'a nested copy shadows the hoisted one' => [
+      ['dependencies' => ['keep' => '^1.0.0']],
+      [
+        'packages' => [
+          '' => ['dependencies' => ['keep' => '^1.0.0']],
+          'node_modules/keep' => ['version' => '1.0.0', 'dependencies' => ['shared' => '^2.0.0']],
+          'node_modules/keep/node_modules/shared' => ['version' => '2.0.0'],
+          'node_modules/shared' => ['version' => '1.0.0'],
+        ],
+      ],
+      ['dependencies' => ['keep' => '^1.0.0']],
+      ['', 'node_modules/keep', 'node_modules/keep/node_modules/shared'],
+    ];
+    yield 'a dependency of a nested copy falls back to the hoisted tree' => [
+      ['dependencies' => ['keep' => '^1.0.0']],
+      [
+        'packages' => [
+          '' => ['dependencies' => ['keep' => '^1.0.0']],
+          'node_modules/keep' => ['version' => '1.0.0', 'dependencies' => ['nested' => '^1.0.0']],
+          'node_modules/keep/node_modules/nested' => ['version' => '1.0.0', 'dependencies' => ['hoisted' => '^1.0.0']],
+          'node_modules/hoisted' => ['version' => '1.0.0'],
+        ],
+      ],
+      ['dependencies' => ['keep' => '^1.0.0']],
+      ['', 'node_modules/keep', 'node_modules/keep/node_modules/nested', 'node_modules/hoisted'],
+    ];
+    yield 'every dependency block is followed' => [
+      [
+        'dependencies' => ['runtime' => '^1.0.0'],
+        'devDependencies' => ['dev' => '^1.0.0'],
+        'optionalDependencies' => ['optional' => '^1.0.0'],
+        'peerDependencies' => ['peer' => '^1.0.0'],
+      ],
+      [
+        'packages' => [
+          '' => ['name' => 'test'],
+          'node_modules/dev' => ['version' => '1.0.0'],
+          'node_modules/optional' => ['version' => '1.0.0'],
+          'node_modules/peer' => ['version' => '1.0.0'],
+          'node_modules/runtime' => ['version' => '1.0.0'],
+          'node_modules/unreferenced' => ['version' => '1.0.0'],
+        ],
+      ],
+      [
+        'name' => 'test',
+        'dependencies' => ['runtime' => '^1.0.0'],
+        'devDependencies' => ['dev' => '^1.0.0'],
+        'optionalDependencies' => ['optional' => '^1.0.0'],
+        'peerDependencies' => ['peer' => '^1.0.0'],
+      ],
+      ['', 'node_modules/dev', 'node_modules/optional', 'node_modules/peer', 'node_modules/runtime'],
+    ];
+    yield 'a block absent from the manifest is dropped from the lock' => [
+      ['dependencies' => ['runtime' => '^1.0.0']],
+      [
+        'packages' => [
+          '' => ['dependencies' => ['runtime' => '^1.0.0'], 'devDependencies' => ['dev' => '^1.0.0']],
+          'node_modules/dev' => ['version' => '1.0.0'],
+          'node_modules/runtime' => ['version' => '1.0.0'],
+        ],
+      ],
+      ['dependencies' => ['runtime' => '^1.0.0']],
+      ['', 'node_modules/runtime'],
+    ];
+    yield 'a manifest entry the lock does not carry is added' => [
+      ['dependencies' => ['added' => '^1.0.0', 'changed' => '^2.0.0']],
+      [
+        'packages' => [
+          '' => ['dependencies' => ['changed' => '^1.0.0']],
+          'node_modules/changed' => ['version' => '1.0.0'],
+        ],
+      ],
+      ['dependencies' => ['added' => '^1.0.0', 'changed' => '^2.0.0']],
+      ['', 'node_modules/changed'],
+    ];
+    yield 'a workspace is a root of its own' => [
+      ['dependencies' => ['app' => '*']],
+      [
+        'packages' => [
+          '' => ['dependencies' => ['app' => '*']],
+          'node_modules/app' => ['resolved' => 'packages/app', 'link' => TRUE],
+          'node_modules/workspace-only' => ['version' => '1.0.0'],
+          'node_modules/unreferenced' => ['version' => '1.0.0'],
+          'packages/app' => ['version' => '1.0.0', 'dependencies' => ['workspace-only' => '^1.0.0']],
+        ],
+      ],
+      ['dependencies' => ['app' => '*']],
+      ['', 'node_modules/app', 'node_modules/workspace-only', 'packages/app'],
+    ];
+    yield 'an unresolvable optional dependency is skipped' => [
+      ['dependencies' => ['keep' => '^1.0.0']],
+      [
+        'packages' => [
+          '' => ['dependencies' => ['keep' => '^1.0.0']],
+          'node_modules/keep' => ['version' => '1.0.0', 'optionalDependencies' => ['never-installed' => '^1.0.0']],
+        ],
+      ],
+      ['dependencies' => ['keep' => '^1.0.0']],
+      ['', 'node_modules/keep'],
+    ];
+  }
+
+  public function testSyncWritesTheFileTheWayNpmWritesIt(): void {
+    $manifest_file = $this->createPair(
+      ['dependencies' => ['keep' => '^1.0.0']],
+      [
+        'name' => 'test',
+        'lockfileVersion' => 3,
+        'packages' => [
+          '' => ['dependencies' => ['keep' => '^1.0.0']],
+          'node_modules/keep' => ['version' => '1.0.0', 'resolved' => 'https://registry.npmjs.org/keep/-/keep-1.0.0.tgz'],
+        ],
+      ]
+    );
+
+    NpmLock::sync($manifest_file);
+
+    $contents = (string) file_get_contents(dirname($manifest_file) . '/package-lock.json');
+
+    $this->assertStringContainsString("\n  \"lockfileVersion\": 3,", $contents);
+    $this->assertStringContainsString("\n    \"node_modules/keep\": {", $contents);
+    $this->assertStringContainsString('https://registry.npmjs.org/keep/-/keep-1.0.0.tgz', $contents);
+    $this->assertStringEndsWith("}\n", $contents);
+  }
+
+  public function testSyncPreservesEmptyObjects(): void {
+    $manifest_file = $this->createPair(['dependencies' => ['keep' => '^1.0.0']], NULL);
+
+    File::dump(dirname($manifest_file) . '/package-lock.json', '{"packages":{"":{"dependencies":{"keep":"^1.0.0"}},"node_modules/keep":{"version":"1.0.0","bin":{}}}}');
+
+    NpmLock::sync($manifest_file);
+
+    $this->assertStringContainsString('"bin": {}', (string) file_get_contents(dirname($manifest_file) . '/package-lock.json'));
+  }
+
+  #[DataProvider('dataProviderSyncThrows')]
+  public function testSyncThrows(?string $manifest_contents, ?string $lock_contents, string $message): void {
+    $dir = File::mkdir(self::$tmp . '/' . uniqid('npmlock_'));
+
+    File::dump($dir . '/package.json', $manifest_contents ?? '{}');
+    File::dump($dir . '/package-lock.json', $lock_contents ?? '{}');
+
+    $this->expectException(\RuntimeException::class);
+    $this->expectExceptionMessageMatches($message);
+
+    NpmLock::sync($dir . '/package.json');
+  }
+
+  public static function dataProviderSyncThrows(): \Iterator {
+    yield 'lock without a packages key' => [NULL, '{"lockfileVersion":1,"dependencies":{}}', '/Unsupported lock file format/'];
+    yield 'lock without a root entry' => [NULL, '{"packages":{"node_modules/keep":{}}}', '/Unsupported lock file format/'];
+    yield 'manifest with invalid JSON' => ['{"name":}', NULL, '/Unable to parse a JSON file/'];
+    yield 'lock with invalid JSON' => [NULL, '{"packages":}', '/Unable to parse a JSON file/'];
+    yield 'manifest that is not an object' => ['[]', NULL, '/a JSON object is required/'];
+    yield 'manifest with a dependency block that is not an object' => ['{"devDependencies":[]}', '{"packages":{"":{}}}', '/Unable to read the "devDependencies" block/'];
+  }
+
+  public function testSyncThrowsWhenLockIsNotWritable(): void {
+    if (function_exists('posix_geteuid') && posix_geteuid() === 0) {
+      $this->markTestSkipped('File permissions do not restrict the root user.');
+    }
+
+    $manifest_file = $this->createPair(
+      ['dependencies' => ['keep' => '^1.0.0']],
+      ['packages' => ['' => ['dependencies' => ['keep' => '^1.0.0']]]]
+    );
+
+    chmod(dirname($manifest_file) . '/package-lock.json', 0444);
+
+    $this->expectException(\RuntimeException::class);
+    $this->expectExceptionMessageMatches('/Unable to write a JSON file/');
+
+    NpmLock::sync($manifest_file);
+  }
+
+  /**
+   * Write a manifest and its lock file into a directory of their own.
+   *
+   * @return string
+   *   Path to the manifest.
+   */
+  protected function createPair(array $manifest, ?array $lock): string {
+    $dir = File::mkdir(self::$tmp . '/' . uniqid('npmlock_'));
+
+    File::dump($dir . '/package.json', (string) json_encode($manifest, JSON_PRETTY_PRINT));
+
+    if ($lock !== NULL) {
+      File::dump($dir . '/package-lock.json', (string) json_encode($lock, JSON_PRETTY_PRINT));
+    }
+
+    return $dir . '/package.json';
+  }
+
+  protected function readLock(string $manifest_file): array {
+    return (array) json_decode((string) file_get_contents(dirname($manifest_file) . '/package-lock.json'), TRUE, 512, JSON_THROW_ON_ERROR);
+  }
+
+}