diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
index 81ca752943..f471313be8 100644
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -1190,6 +1190,7 @@ phutil_register_library_map(array(
     'HarbormasterLintPropertyView' => 'applications/harbormaster/view/HarbormasterLintPropertyView.php',
     'HarbormasterManagementArchiveLogsWorkflow' => 'applications/harbormaster/management/HarbormasterManagementArchiveLogsWorkflow.php',
     'HarbormasterManagementBuildWorkflow' => 'applications/harbormaster/management/HarbormasterManagementBuildWorkflow.php',
+    'HarbormasterManagementRestartWorkflow' => 'applications/harbormaster/management/HarbormasterManagementRestartWorkflow.php',
     'HarbormasterManagementUpdateWorkflow' => 'applications/harbormaster/management/HarbormasterManagementUpdateWorkflow.php',
     'HarbormasterManagementWorkflow' => 'applications/harbormaster/management/HarbormasterManagementWorkflow.php',
     'HarbormasterMessageType' => 'applications/harbormaster/engine/HarbormasterMessageType.php',
@@ -5785,6 +5786,7 @@ phutil_register_library_map(array(
     'HarbormasterLintPropertyView' => 'AphrontView',
     'HarbormasterManagementArchiveLogsWorkflow' => 'HarbormasterManagementWorkflow',
     'HarbormasterManagementBuildWorkflow' => 'HarbormasterManagementWorkflow',
+    'HarbormasterManagementRestartWorkflow' => 'HarbormasterManagementWorkflow',
     'HarbormasterManagementUpdateWorkflow' => 'HarbormasterManagementWorkflow',
     'HarbormasterManagementWorkflow' => 'PhabricatorManagementWorkflow',
     'HarbormasterMessageType' => 'Phobject',
diff --git a/src/applications/harbormaster/management/HarbormasterManagementRestartWorkflow.php b/src/applications/harbormaster/management/HarbormasterManagementRestartWorkflow.php
new file mode 100644
index 0000000000..2a38e10409
--- /dev/null
+++ b/src/applications/harbormaster/management/HarbormasterManagementRestartWorkflow.php
@@ -0,0 +1,100 @@
+<?php
+
+final class HarbormasterManagementRestartWorkflow
+  extends HarbormasterManagementWorkflow {
+
+  protected function didConstruct() {
+    $this
+      ->setName('restart')
+      ->setExamples(
+        "**restart** --active\n".
+        '**restart** --id id')
+      ->setSynopsis(pht('Restart Harbormaster builds.'))
+      ->setArguments(
+        array(
+          array(
+            'name' => 'id',
+            'param' => 'id',
+            'repeat' => true,
+            'help' => pht('Select one or more builds by ID.'),
+          ),
+          array(
+            'name' => 'active',
+            'help' => pht('Select all active builds.'),
+          ),
+        ));
+  }
+
+  public function execute(PhutilArgumentParser $args) {
+    $viewer = $this->getViewer();
+    $ids = $args->getArg('id');
+    $active = $args->getArg('active');
+
+    if (!$ids && !$active) {
+      throw new PhutilArgumentUsageException(
+        pht('Use --id or --active to select builds.'));
+    } if ($ids && $active) {
+      throw new PhutilArgumentUsageException(
+        pht('Use one of --id or --active to select builds, but not both.'));
+    }
+
+    $query = id(new HarbormasterBuildQuery())
+      ->setViewer($viewer);
+    if ($ids) {
+      $query->withIDs($ids);
+    } else {
+      $query->withBuildStatuses(
+        HarbormasterBuildStatus::getActiveStatusConstants());
+    }
+    $builds = $query->execute();
+
+    $console = PhutilConsole::getConsole();
+    $count = count($builds);
+    if (!$count) {
+      $console->writeOut("%s\n", pht('No builds to restart.'));
+      return 0;
+    }
+    $prompt = pht('Restart %s build(s)?', new PhutilNumber($count));
+    if (!phutil_console_confirm($prompt)) {
+      $console->writeOut("%s\n", pht('Cancelled.'));
+      return 1;
+    }
+
+    $app_phid = id(new PhabricatorHarbormasterApplication())->getPHID();
+    $editor = id(new HarbormasterBuildTransactionEditor())
+      ->setActor($viewer)
+      ->setActingAsPHID($app_phid)
+      ->setContentSource($this->newContentSource());
+    foreach ($builds as $build) {
+      $console->writeOut(
+        "<bg:blue> %s </bg> %s\n",
+        pht('RESTARTING'),
+        pht('Build %d: %s', $build->getID(), $build->getName()));
+      if (!$build->canRestartBuild()) {
+        $console->writeOut(
+          "<bg:yellow> %s </bg> %s\n",
+          pht('INVALID'),
+          pht('Cannot be restarted.'));
+        continue;
+      }
+      $xactions = array();
+      $xactions[] = id(new HarbormasterBuildTransaction())
+        ->setTransactionType(HarbormasterBuildTransaction::TYPE_COMMAND)
+        ->setNewValue(HarbormasterBuildCommand::COMMAND_RESTART);
+      try {
+        $editor->applyTransactions($build, $xactions);
+      } catch (Exception $e) {
+        $message = phutil_console_wrap($e->getMessage(), 2);
+        $console->writeOut(
+          "<bg:red> %s </bg>\n%s\n",
+          pht('FAILED'),
+          $message);
+        continue;
+      }
+      $console->writeOut("<bg:green> %s </bg>\n", pht('SUCCESS'));
+    }
+
+    return 0;
+  }
+
+}
diff --git a/src/infrastructure/internationalization/translation/PhabricatorUSEnglishTranslation.php b/src/infrastructure/internationalization/translation/PhabricatorUSEnglishTranslation.php
index c65103d4ef..b11f67ceb4 100644
--- a/src/infrastructure/internationalization/translation/PhabricatorUSEnglishTranslation.php
+++ b/src/infrastructure/internationalization/translation/PhabricatorUSEnglishTranslation.php
@@ -1573,6 +1573,11 @@ final class PhabricatorUSEnglishTranslation
 
       '%s updated the invite list for %s, invited %s: %s; uninvinted %s: %s.' =>
         '%s updated the invite list for %s, invited: %4$s; uninvited: %6$s.',
+
+      'Restart %s build(s)?' => array(
+        'Restart %s build?',
+        'Restart %s builds?',
+      ),
     );
   }