diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -1131,6 +1131,7 @@
     'HarbormasterBuildQuery' => 'applications/harbormaster/query/HarbormasterBuildQuery.php',
     'HarbormasterBuildRequest' => 'applications/harbormaster/engine/HarbormasterBuildRequest.php',
     'HarbormasterBuildSearchEngine' => 'applications/harbormaster/query/HarbormasterBuildSearchEngine.php',
+    'HarbormasterBuildStatus' => 'applications/harbormaster/constants/HarbormasterBuildStatus.php',
     'HarbormasterBuildStatusDatasource' => 'applications/harbormaster/typeahead/HarbormasterBuildStatusDatasource.php',
     'HarbormasterBuildStep' => 'applications/harbormaster/storage/configuration/HarbormasterBuildStep.php',
     'HarbormasterBuildStepCoreCustomField' => 'applications/harbormaster/customfield/HarbormasterBuildStepCoreCustomField.php',
@@ -5687,6 +5688,7 @@
     'HarbormasterBuildQuery' => 'PhabricatorCursorPagedPolicyAwareQuery',
     'HarbormasterBuildRequest' => 'Phobject',
     'HarbormasterBuildSearchEngine' => 'PhabricatorApplicationSearchEngine',
+    'HarbormasterBuildStatus' => 'Phobject',
     'HarbormasterBuildStatusDatasource' => 'PhabricatorTypeaheadDatasource',
     'HarbormasterBuildStep' => array(
       'HarbormasterDAO',
diff --git a/src/applications/harbormaster/conduit/HarbormasterQueryBuildsConduitAPIMethod.php b/src/applications/harbormaster/conduit/HarbormasterQueryBuildsConduitAPIMethod.php
--- a/src/applications/harbormaster/conduit/HarbormasterQueryBuildsConduitAPIMethod.php
+++ b/src/applications/harbormaster/conduit/HarbormasterQueryBuildsConduitAPIMethod.php
@@ -66,6 +66,7 @@
       $id = $build->getID();
       $uri = '/harbormaster/build/'.$id.'/';
       $status = $build->getBuildStatus();
+      $status_name = HarbormasterBuildStatus::getBuildStatusName($status);
 
       $data[] = array(
         'id' => $id,
@@ -75,7 +76,7 @@
         'buildablePHID' => $build->getBuildablePHID(),
         'buildPlanPHID' => $build->getBuildPlanPHID(),
         'buildStatus' => $status,
-        'buildStatusName' => HarbormasterBuild::getBuildStatusName($status),
+        'buildStatusName' => $status_name,
       );
     }
 
diff --git a/src/applications/harbormaster/constants/HarbormasterBuildStatus.php b/src/applications/harbormaster/constants/HarbormasterBuildStatus.php
new file mode 100644
--- /dev/null
+++ b/src/applications/harbormaster/constants/HarbormasterBuildStatus.php
@@ -0,0 +1,121 @@
+<?php
+
+final class HarbormasterBuildStatus extends Phobject {
+
+  /**
+   * Not currently being built.
+   */
+  const STATUS_INACTIVE = 'inactive';
+
+  /**
+   * Pending pick up by the Harbormaster daemon.
+   */
+  const STATUS_PENDING = 'pending';
+
+  /**
+   * Current building the buildable.
+   */
+  const STATUS_BUILDING = 'building';
+
+  /**
+   * The build has passed.
+   */
+  const STATUS_PASSED = 'passed';
+
+  /**
+   * The build has failed.
+   */
+  const STATUS_FAILED = 'failed';
+
+  /**
+   * The build has aborted.
+   */
+  const STATUS_ABORTED = 'aborted';
+
+  /**
+   * The build encountered an unexpected error.
+   */
+  const STATUS_ERROR = 'error';
+
+  /**
+   * The build has been paused.
+   */
+  const STATUS_PAUSED = 'paused';
+
+  /**
+   * The build has been deadlocked.
+   */
+  const STATUS_DEADLOCKED = 'deadlocked';
+
+
+  /**
+   * Get a human readable name for a build status constant.
+   *
+   * @param  const  Build status constant.
+   * @return string Human-readable name.
+   */
+  public static function getBuildStatusName($status) {
+    $map = self::getBuildStatusMap();
+    return idx($map, $status, pht('Unknown ("%s")', $status));
+  }
+
+  public static function getBuildStatusMap() {
+    return array(
+      self::STATUS_INACTIVE => pht('Inactive'),
+      self::STATUS_PENDING => pht('Pending'),
+      self::STATUS_BUILDING => pht('Building'),
+      self::STATUS_PASSED => pht('Passed'),
+      self::STATUS_FAILED => pht('Failed'),
+      self::STATUS_ABORTED => pht('Aborted'),
+      self::STATUS_ERROR => pht('Unexpected Error'),
+      self::STATUS_PAUSED => pht('Paused'),
+      self::STATUS_DEADLOCKED => pht('Deadlocked'),
+    );
+  }
+
+  public static function getBuildStatusIcon($status) {
+    switch ($status) {
+      case self::STATUS_INACTIVE:
+      case self::STATUS_PENDING:
+        return PHUIStatusItemView::ICON_OPEN;
+      case self::STATUS_BUILDING:
+        return PHUIStatusItemView::ICON_RIGHT;
+      case self::STATUS_PASSED:
+        return PHUIStatusItemView::ICON_ACCEPT;
+      case self::STATUS_FAILED:
+        return PHUIStatusItemView::ICON_REJECT;
+      case self::STATUS_ABORTED:
+        return PHUIStatusItemView::ICON_MINUS;
+      case self::STATUS_ERROR:
+        return PHUIStatusItemView::ICON_MINUS;
+      case self::STATUS_PAUSED:
+        return PHUIStatusItemView::ICON_MINUS;
+      case self::STATUS_DEADLOCKED:
+        return PHUIStatusItemView::ICON_WARNING;
+      default:
+        return PHUIStatusItemView::ICON_QUESTION;
+    }
+  }
+
+  public static function getBuildStatusColor($status) {
+    switch ($status) {
+      case self::STATUS_INACTIVE:
+        return 'dark';
+      case self::STATUS_PENDING:
+      case self::STATUS_BUILDING:
+        return 'blue';
+      case self::STATUS_PASSED:
+        return 'green';
+      case self::STATUS_FAILED:
+      case self::STATUS_ABORTED:
+      case self::STATUS_ERROR:
+      case self::STATUS_DEADLOCKED:
+        return 'red';
+      case self::STATUS_PAUSED:
+        return 'dark';
+      default:
+        return 'bluegrey';
+    }
+  }
+
+}
diff --git a/src/applications/harbormaster/controller/HarbormasterBuildViewController.php b/src/applications/harbormaster/controller/HarbormasterBuildViewController.php
--- a/src/applications/harbormaster/controller/HarbormasterBuildViewController.php
+++ b/src/applications/harbormaster/controller/HarbormasterBuildViewController.php
@@ -581,9 +581,9 @@
     } else {
       $status = $build->getBuildStatus();
       $status_name =
-        HarbormasterBuild::getBuildStatusName($status);
-      $icon = HarbormasterBuild::getBuildStatusIcon($status);
-      $color = HarbormasterBuild::getBuildStatusColor($status);
+        HarbormasterBuildStatus::getBuildStatusName($status);
+      $icon = HarbormasterBuildStatus::getBuildStatusIcon($status);
+      $color = HarbormasterBuildStatus::getBuildStatusColor($status);
     }
 
     $item->setTarget($status_name);
diff --git a/src/applications/harbormaster/controller/HarbormasterBuildableViewController.php b/src/applications/harbormaster/controller/HarbormasterBuildableViewController.php
--- a/src/applications/harbormaster/controller/HarbormasterBuildableViewController.php
+++ b/src/applications/harbormaster/controller/HarbormasterBuildableViewController.php
@@ -196,11 +196,10 @@
         ->setHref($view_uri);
 
       $status = $build->getBuildStatus();
-      $item->setStatusIcon(
-        'fa-dot-circle-o '.HarbormasterBuild::getBuildStatusColor($status),
-        HarbormasterBuild::getBuildStatusName($status));
-
-      $item->addAttribute(HarbormasterBuild::getBuildStatusName($status));
+      $status_color = HarbormasterBuildStatus::getBuildStatusColor($status);
+      $status_name = HarbormasterBuildStatus::getBuildStatusName($status);
+      $item->setStatusIcon('fa-dot-circle-o '.$status_color, $status_name);
+      $item->addAttribute($status_name);
 
       if ($build->isRestarting()) {
         $item->addIcon('fa-repeat', pht('Restarting'));
diff --git a/src/applications/harbormaster/engine/HarbormasterBuildEngine.php b/src/applications/harbormaster/engine/HarbormasterBuildEngine.php
--- a/src/applications/harbormaster/engine/HarbormasterBuildEngine.php
+++ b/src/applications/harbormaster/engine/HarbormasterBuildEngine.php
@@ -63,7 +63,7 @@
       // If any exception is raised, the build is marked as a failure and the
       // exception is re-thrown (this ensures we don't leave builds in an
       // inconsistent state).
-      $build->setBuildStatus(HarbormasterBuild::STATUS_ERROR);
+      $build->setBuildStatus(HarbormasterBuildStatus::STATUS_ERROR);
       $build->save();
 
       $lock->unlock();
@@ -106,30 +106,30 @@
   private function updateBuild(HarbormasterBuild $build) {
     if ($build->isAborting()) {
       $this->releaseAllArtifacts($build);
-      $build->setBuildStatus(HarbormasterBuild::STATUS_ABORTED);
+      $build->setBuildStatus(HarbormasterBuildStatus::STATUS_ABORTED);
       $build->save();
     }
 
-    if (($build->getBuildStatus() == HarbormasterBuild::STATUS_PENDING) ||
+    if (($build->getBuildStatus() == HarbormasterBuildStatus::STATUS_PENDING) ||
         ($build->isRestarting())) {
       $this->restartBuild($build);
-      $build->setBuildStatus(HarbormasterBuild::STATUS_BUILDING);
+      $build->setBuildStatus(HarbormasterBuildStatus::STATUS_BUILDING);
       $build->save();
     }
 
     if ($build->isResuming()) {
-      $build->setBuildStatus(HarbormasterBuild::STATUS_BUILDING);
+      $build->setBuildStatus(HarbormasterBuildStatus::STATUS_BUILDING);
       $build->save();
     }
 
     if ($build->isPausing() && !$build->isComplete()) {
-      $build->setBuildStatus(HarbormasterBuild::STATUS_PAUSED);
+      $build->setBuildStatus(HarbormasterBuildStatus::STATUS_PAUSED);
       $build->save();
     }
 
     $build->deleteUnprocessedCommands();
 
-    if ($build->getBuildStatus() == HarbormasterBuild::STATUS_BUILDING) {
+    if ($build->getBuildStatus() == HarbormasterBuildStatus::STATUS_BUILDING) {
       $this->updateBuildSteps($build);
     }
   }
@@ -243,7 +243,7 @@
 
     // If any step failed, fail the whole build, then bail.
     if (count($failed)) {
-      $build->setBuildStatus(HarbormasterBuild::STATUS_FAILED);
+      $build->setBuildStatus(HarbormasterBuildStatus::STATUS_FAILED);
       $build->save();
       return;
     }
@@ -251,7 +251,7 @@
     // If every step is complete, we're done with this build. Mark it passed
     // and bail.
     if (count($complete) == count($steps)) {
-      $build->setBuildStatus(HarbormasterBuild::STATUS_PASSED);
+      $build->setBuildStatus(HarbormasterBuildStatus::STATUS_PASSED);
       $build->save();
       return;
     }
@@ -287,7 +287,7 @@
     if (!$runnable && !$waiting && !$underway) {
       // This means the build is deadlocked, and the user has configured
       // circular dependencies.
-      $build->setBuildStatus(HarbormasterBuild::STATUS_DEADLOCKED);
+      $build->setBuildStatus(HarbormasterBuildStatus::STATUS_DEADLOCKED);
       $build->save();
       return;
     }
@@ -443,14 +443,14 @@
     $all_pass = true;
     $any_fail = false;
     foreach ($buildable->getBuilds() as $build) {
-      if ($build->getBuildStatus() != HarbormasterBuild::STATUS_PASSED) {
+      if ($build->getBuildStatus() != HarbormasterBuildStatus::STATUS_PASSED) {
         $all_pass = false;
       }
-      if ($build->getBuildStatus() == HarbormasterBuild::STATUS_FAILED ||
-          $build->getBuildStatus() == HarbormasterBuild::STATUS_ERROR ||
-          $build->getBuildStatus() == HarbormasterBuild::STATUS_DEADLOCKED) {
-        $any_fail = true;
-      }
+      $any_fail = in_array($build->getBuildStatus(), array(
+          HarbormasterBuildStatus::STATUS_FAILED,
+          HarbormasterBuildStatus::STATUS_ERROR,
+          HarbormasterBuildStatus::STATUS_DEADLOCKED,
+        ));
     }
 
     if ($any_fail) {
diff --git a/src/applications/harbormaster/event/HarbormasterUIEventListener.php b/src/applications/harbormaster/event/HarbormasterUIEventListener.php
--- a/src/applications/harbormaster/event/HarbormasterUIEventListener.php
+++ b/src/applications/harbormaster/event/HarbormasterUIEventListener.php
@@ -132,9 +132,9 @@
       }
 
       $status = $build->getBuildStatus();
-      $status_name = HarbormasterBuild::getBuildStatusName($status);
-      $icon = HarbormasterBuild::getBuildStatusIcon($status);
-      $color = HarbormasterBuild::getBuildStatusColor($status);
+      $status_name = HarbormasterBuildStatus::getBuildStatusName($status);
+      $icon = HarbormasterBuildStatus::getBuildStatusIcon($status);
+      $color = HarbormasterBuildStatus::getBuildStatusColor($status);
 
       $item->setIcon($icon, $color, $status_name);
 
diff --git a/src/applications/harbormaster/query/HarbormasterBuildSearchEngine.php b/src/applications/harbormaster/query/HarbormasterBuildSearchEngine.php
--- a/src/applications/harbormaster/query/HarbormasterBuildSearchEngine.php
+++ b/src/applications/harbormaster/query/HarbormasterBuildSearchEngine.php
@@ -107,9 +107,9 @@
 
       $status = $build->getBuildStatus();
 
-      $status_icon = HarbormasterBuild::getBuildStatusIcon($status);
-      $status_color = HarbormasterBuild::getBuildStatusColor($status);
-      $status_label = HarbormasterBuild::getBuildStatusName($status);
+      $status_icon = HarbormasterBuildStatus::getBuildStatusIcon($status);
+      $status_color = HarbormasterBuildStatus::getBuildStatusColor($status);
+      $status_label = HarbormasterBuildStatus::getBuildStatusName($status);
 
       $item->setStatusIcon("{$status_icon} {$status_color}", $status_label);
 
diff --git a/src/applications/harbormaster/storage/HarbormasterBuildable.php b/src/applications/harbormaster/storage/HarbormasterBuildable.php
--- a/src/applications/harbormaster/storage/HarbormasterBuildable.php
+++ b/src/applications/harbormaster/storage/HarbormasterBuildable.php
@@ -170,7 +170,7 @@
       ->setBuildablePHID($this->getPHID())
       ->setBuildPlanPHID($plan->getPHID())
       ->setBuildParameters($parameters)
-      ->setBuildStatus(HarbormasterBuild::STATUS_PENDING);
+      ->setBuildStatus(HarbormasterBuildStatus::STATUS_PENDING);
     if ($initiator_phid) {
       $build->setInitiatorPHID($initiator_phid);
     }
diff --git a/src/applications/harbormaster/storage/build/HarbormasterBuild.php b/src/applications/harbormaster/storage/build/HarbormasterBuild.php
--- a/src/applications/harbormaster/storage/build/HarbormasterBuild.php
+++ b/src/applications/harbormaster/storage/build/HarbormasterBuild.php
@@ -18,125 +18,9 @@
   private $buildTargets = self::ATTACHABLE;
   private $unprocessedCommands = self::ATTACHABLE;
 
-  /**
-   * Not currently being built.
-   */
-  const STATUS_INACTIVE = 'inactive';
-
-  /**
-   * Pending pick up by the Harbormaster daemon.
-   */
-  const STATUS_PENDING = 'pending';
-
-  /**
-   * Current building the buildable.
-   */
-  const STATUS_BUILDING = 'building';
-
-  /**
-   * The build has passed.
-   */
-  const STATUS_PASSED = 'passed';
-
-  /**
-   * The build has failed.
-   */
-  const STATUS_FAILED = 'failed';
-
-  /**
-   * The build has aborted.
-   */
-  const STATUS_ABORTED = 'aborted';
-
-  /**
-   * The build encountered an unexpected error.
-   */
-  const STATUS_ERROR = 'error';
-
-  /**
-   * The build has been paused.
-   */
-  const STATUS_PAUSED = 'paused';
-
-  /**
-   * The build has been deadlocked.
-   */
-  const STATUS_DEADLOCKED = 'deadlocked';
-
-
-  /**
-   * Get a human readable name for a build status constant.
-   *
-   * @param  const  Build status constant.
-   * @return string Human-readable name.
-   */
-  public static function getBuildStatusName($status) {
-    $map = self::getBuildStatusMap();
-    return idx($map, $status, pht('Unknown ("%s")', $status));
-  }
-
-  public static function getBuildStatusMap() {
-    return array(
-      self::STATUS_INACTIVE => pht('Inactive'),
-      self::STATUS_PENDING => pht('Pending'),
-      self::STATUS_BUILDING => pht('Building'),
-      self::STATUS_PASSED => pht('Passed'),
-      self::STATUS_FAILED => pht('Failed'),
-      self::STATUS_ABORTED => pht('Aborted'),
-      self::STATUS_ERROR => pht('Unexpected Error'),
-      self::STATUS_PAUSED => pht('Paused'),
-      self::STATUS_DEADLOCKED => pht('Deadlocked'),
-    );
-  }
-
-  public static function getBuildStatusIcon($status) {
-    switch ($status) {
-      case self::STATUS_INACTIVE:
-      case self::STATUS_PENDING:
-        return PHUIStatusItemView::ICON_OPEN;
-      case self::STATUS_BUILDING:
-        return PHUIStatusItemView::ICON_RIGHT;
-      case self::STATUS_PASSED:
-        return PHUIStatusItemView::ICON_ACCEPT;
-      case self::STATUS_FAILED:
-        return PHUIStatusItemView::ICON_REJECT;
-      case self::STATUS_ABORTED:
-        return PHUIStatusItemView::ICON_MINUS;
-      case self::STATUS_ERROR:
-        return PHUIStatusItemView::ICON_MINUS;
-      case self::STATUS_PAUSED:
-        return PHUIStatusItemView::ICON_MINUS;
-      case self::STATUS_DEADLOCKED:
-        return PHUIStatusItemView::ICON_WARNING;
-      default:
-        return PHUIStatusItemView::ICON_QUESTION;
-    }
-  }
-
-  public static function getBuildStatusColor($status) {
-    switch ($status) {
-      case self::STATUS_INACTIVE:
-        return 'dark';
-      case self::STATUS_PENDING:
-      case self::STATUS_BUILDING:
-        return 'blue';
-      case self::STATUS_PASSED:
-        return 'green';
-      case self::STATUS_FAILED:
-      case self::STATUS_ABORTED:
-      case self::STATUS_ERROR:
-      case self::STATUS_DEADLOCKED:
-        return 'red';
-      case self::STATUS_PAUSED:
-        return 'dark';
-      default:
-        return 'bluegrey';
-    }
-  }
-
   public static function initializeNewBuild(PhabricatorUser $actor) {
     return id(new HarbormasterBuild())
-      ->setBuildStatus(self::STATUS_INACTIVE)
+      ->setBuildStatus(HarbormasterBuildStatus::STATUS_INACTIVE)
       ->setBuildGeneration(0);
   }
 
@@ -220,8 +104,9 @@
   }
 
   public function isBuilding() {
-    return $this->getBuildStatus() === self::STATUS_PENDING ||
-      $this->getBuildStatus() === self::STATUS_BUILDING;
+    return
+      $this->getBuildStatus() === HarbormasterBuildStatus::STATUS_PENDING ||
+      $this->getBuildStatus() === HarbormasterBuildStatus::STATUS_BUILDING;
   }
 
   public function isAutobuild() {
@@ -285,11 +170,11 @@
 
   public function isComplete() {
     switch ($this->getBuildStatus()) {
-      case self::STATUS_PASSED:
-      case self::STATUS_FAILED:
-      case self::STATUS_ABORTED:
-      case self::STATUS_ERROR:
-      case self::STATUS_PAUSED:
+      case HarbormasterBuildStatus::STATUS_PASSED:
+      case HarbormasterBuildStatus::STATUS_FAILED:
+      case HarbormasterBuildStatus::STATUS_ABORTED:
+      case HarbormasterBuildStatus::STATUS_ERROR:
+      case HarbormasterBuildStatus::STATUS_PAUSED:
         return true;
     }
 
@@ -297,7 +182,7 @@
   }
 
   public function isPaused() {
-    return ($this->getBuildStatus() == self::STATUS_PAUSED);
+    return ($this->getBuildStatus() == HarbormasterBuildStatus::STATUS_PAUSED);
   }
 
   public function getURI() {
diff --git a/src/applications/harbormaster/typeahead/HarbormasterBuildStatusDatasource.php b/src/applications/harbormaster/typeahead/HarbormasterBuildStatusDatasource.php
--- a/src/applications/harbormaster/typeahead/HarbormasterBuildStatusDatasource.php
+++ b/src/applications/harbormaster/typeahead/HarbormasterBuildStatusDatasource.php
@@ -27,11 +27,11 @@
   private function buildResults() {
     $results = array();
 
-    $status_map = HarbormasterBuild::getBuildStatusMap();
+    $status_map = HarbormasterBuildStatus::getBuildStatusMap();
     foreach ($status_map as $value => $name) {
       $result = id(new PhabricatorTypeaheadResult())
-        ->setIcon(HarbormasterBuild::getBuildStatusIcon($value))
-        ->setColor(HarbormasterBuild::getBuildStatusColor($value))
+        ->setIcon(HarbormasterBuildStatus::getBuildStatusIcon($value))
+        ->setColor(HarbormasterBuildStatus::getBuildStatusColor($value))
         ->setPHID($value)
         ->setName($name)
         ->addAttribute(pht('Status'));