diff --git a/src/applications/project/query/PhabricatorProjectSearchEngine.php b/src/applications/project/query/PhabricatorProjectSearchEngine.php
index cfb1868a61..5df3bbeb1a 100644
--- a/src/applications/project/query/PhabricatorProjectSearchEngine.php
+++ b/src/applications/project/query/PhabricatorProjectSearchEngine.php
@@ -1,209 +1,226 @@
 <?php
 
 final class PhabricatorProjectSearchEngine
   extends PhabricatorApplicationSearchEngine {
 
   public function getResultTypeDescription() {
     return pht('Projects');
   }
 
   public function getApplicationClassName() {
     return 'PhabricatorProjectApplication';
   }
 
   public function newQuery() {
     return id(new PhabricatorProjectQuery())
-      ->needImages(true)
-      ->withIsMilestone(false);
+      ->needImages(true);
   }
 
   protected function buildCustomSearchFields() {
     return array(
       id(new PhabricatorSearchTextField())
         ->setLabel(pht('Name'))
         ->setKey('name'),
       id(new PhabricatorUsersSearchField())
         ->setLabel(pht('Members'))
         ->setKey('memberPHIDs')
         ->setAliases(array('member', 'members')),
       id(new PhabricatorUsersSearchField())
         ->setLabel(pht('Watchers'))
         ->setKey('watcherPHIDs')
         ->setAliases(array('watcher', 'watchers')),
       id(new PhabricatorSearchSelectField())
         ->setLabel(pht('Status'))
         ->setKey('status')
         ->setOptions($this->getStatusOptions()),
+      id(new PhabricatorSearchThreeStateField())
+        ->setLabel(pht('Milestones'))
+        ->setKey('isMilestone')
+        ->setOptions(
+          pht('(Show All)'),
+          pht('Show Only Milestones'),
+          pht('Hide Milestones'))
+        ->setDescription(
+          pht(
+            'Pass true to find only milestones, or false to omit '.
+            'milestones.')),
       id(new PhabricatorSearchCheckboxesField())
         ->setLabel(pht('Icons'))
         ->setKey('icons')
         ->setOptions($this->getIconOptions()),
       id(new PhabricatorSearchCheckboxesField())
         ->setLabel(pht('Colors'))
         ->setKey('colors')
         ->setOptions($this->getColorOptions()),
     );
   }
 
 
   protected function buildQueryFromParameters(array $map) {
     $query = $this->newQuery();
 
     if (strlen($map['name'])) {
       $tokens = PhabricatorTypeaheadDatasource::tokenizeString($map['name']);
       $query->withNameTokens($tokens);
     }
 
     if ($map['memberPHIDs']) {
       $query->withMemberPHIDs($map['memberPHIDs']);
     }
 
     if ($map['watcherPHIDs']) {
       $query->withWatcherPHIDs($map['watcherPHIDs']);
     }
 
     if ($map['status']) {
       $status = idx($this->getStatusValues(), $map['status']);
       if ($status) {
         $query->withStatus($status);
       }
     }
 
     if ($map['icons']) {
       $query->withIcons($map['icons']);
     }
 
     if ($map['colors']) {
       $query->withColors($map['colors']);
     }
 
+    if ($map['isMilestone'] !== null) {
+      $query->withIsMilestone($map['isMilestone']);
+    }
+
     return $query;
   }
 
   protected function getURI($path) {
     return '/project/'.$path;
   }
 
   protected function getBuiltinQueryNames() {
     $names = array();
 
     if ($this->requireViewer()->isLoggedIn()) {
       $names['joined'] = pht('Joined');
     }
 
     $names['active'] = pht('Active');
     $names['all'] = pht('All');
 
     return $names;
   }
 
   public function buildSavedQueryFromBuiltin($query_key) {
     $query = $this->newSavedQuery();
     $query->setQueryKey($query_key);
 
     $viewer_phid = $this->requireViewer()->getPHID();
 
+    // By default, do not show milestones in the list view.
+    $query->setParameter('isMilestone', false);
+
     switch ($query_key) {
       case 'all':
         return $query;
       case 'active':
         return $query
           ->setParameter('status', 'active');
       case 'joined':
         return $query
           ->setParameter('memberPHIDs', array($viewer_phid))
           ->setParameter('status', 'active');
     }
 
     return parent::buildSavedQueryFromBuiltin($query_key);
   }
 
   private function getStatusOptions() {
     return array(
       'active'   => pht('Show Only Active Projects'),
       'archived' => pht('Show Only Archived Projects'),
       'all'      => pht('Show All Projects'),
     );
   }
 
   private function getStatusValues() {
     return array(
       'active'   => PhabricatorProjectQuery::STATUS_ACTIVE,
       'archived' => PhabricatorProjectQuery::STATUS_ARCHIVED,
       'all'      => PhabricatorProjectQuery::STATUS_ANY,
     );
   }
 
   private function getIconOptions() {
     $options = array();
 
     $set = new PhabricatorProjectIconSet();
     foreach ($set->getIcons() as $icon) {
       if ($icon->getIsDisabled()) {
         continue;
       }
 
       $options[$icon->getKey()] = array(
         id(new PHUIIconView())
           ->setIcon($icon->getIcon()),
         ' ',
         $icon->getLabel(),
       );
     }
 
     return $options;
   }
 
   private function getColorOptions() {
     $options = array();
 
     foreach (PhabricatorProjectIconSet::getColorMap() as $color => $name) {
       $options[$color] = array(
         id(new PHUITagView())
           ->setType(PHUITagView::TYPE_SHADE)
           ->setShade($color)
           ->setName($name),
       );
     }
 
     return $options;
   }
 
   protected function renderResultList(
     array $projects,
     PhabricatorSavedQuery $query,
     array $handles) {
     assert_instances_of($projects, 'PhabricatorProject');
     $viewer = $this->requireViewer();
 
     $list = id(new PhabricatorProjectListView())
       ->setUser($viewer)
       ->setProjects($projects)
       ->renderList();
 
     return id(new PhabricatorApplicationSearchResultView())
       ->setObjectList($list)
       ->setNoDataString(pht('No projects found.'));
   }
 
   protected function getNewUserBody() {
     $create_button = id(new PHUIButtonView())
       ->setTag('a')
       ->setText(pht('Create a Project'))
       ->setHref('/project/edit/')
       ->setColor(PHUIButtonView::GREEN);
 
     $icon = $this->getApplication()->getIcon();
     $app_name =  $this->getApplication()->getName();
     $view = id(new PHUIBigInfoView())
       ->setIcon($icon)
       ->setTitle(pht('Welcome to %s', $app_name))
       ->setDescription(
         pht('Projects are flexible storage containers used as '.
             'tags, teams, projects, or anything you need to group.'))
       ->addAction($create_button);
 
       return $view;
   }
 
 }
diff --git a/src/applications/project/storage/PhabricatorProject.php b/src/applications/project/storage/PhabricatorProject.php
index 47e251f3af..c8b5e2e45a 100644
--- a/src/applications/project/storage/PhabricatorProject.php
+++ b/src/applications/project/storage/PhabricatorProject.php
@@ -1,804 +1,815 @@
 <?php
 
 final class PhabricatorProject extends PhabricatorProjectDAO
   implements
     PhabricatorApplicationTransactionInterface,
     PhabricatorFlaggableInterface,
     PhabricatorPolicyInterface,
     PhabricatorExtendedPolicyInterface,
     PhabricatorCustomFieldInterface,
     PhabricatorDestructibleInterface,
     PhabricatorFulltextInterface,
     PhabricatorConduitResultInterface,
     PhabricatorColumnProxyInterface {
 
   protected $name;
   protected $status = PhabricatorProjectStatus::STATUS_ACTIVE;
   protected $authorPHID;
   protected $primarySlug;
   protected $profileImagePHID;
   protected $icon;
   protected $color;
   protected $mailKey;
 
   protected $viewPolicy;
   protected $editPolicy;
   protected $joinPolicy;
   protected $isMembershipLocked;
 
   protected $parentProjectPHID;
   protected $hasWorkboard;
   protected $hasMilestones;
   protected $hasSubprojects;
   protected $milestoneNumber;
 
   protected $projectPath;
   protected $projectDepth;
   protected $projectPathKey;
 
   protected $properties = array();
 
   private $memberPHIDs = self::ATTACHABLE;
   private $watcherPHIDs = self::ATTACHABLE;
   private $sparseWatchers = self::ATTACHABLE;
   private $sparseMembers = self::ATTACHABLE;
   private $customFields = self::ATTACHABLE;
   private $profileImageFile = self::ATTACHABLE;
   private $slugs = self::ATTACHABLE;
   private $parentProject = self::ATTACHABLE;
 
   const TABLE_DATASOURCE_TOKEN = 'project_datasourcetoken';
 
   const ITEM_PROFILE = 'project.profile';
   const ITEM_POINTS = 'project.points';
   const ITEM_WORKBOARD = 'project.workboard';
   const ITEM_MEMBERS = 'project.members';
   const ITEM_MANAGE = 'project.manage';
   const ITEM_MILESTONES = 'project.milestones';
   const ITEM_SUBPROJECTS = 'project.subprojects';
 
   public static function initializeNewProject(PhabricatorUser $actor) {
     $app = id(new PhabricatorApplicationQuery())
       ->setViewer(PhabricatorUser::getOmnipotentUser())
       ->withClasses(array('PhabricatorProjectApplication'))
       ->executeOne();
 
     $view_policy = $app->getPolicy(
       ProjectDefaultViewCapability::CAPABILITY);
     $edit_policy = $app->getPolicy(
       ProjectDefaultEditCapability::CAPABILITY);
     $join_policy = $app->getPolicy(
       ProjectDefaultJoinCapability::CAPABILITY);
 
     $default_icon = PhabricatorProjectIconSet::getDefaultIconKey();
     $default_color = PhabricatorProjectIconSet::getDefaultColorKey();
 
     return id(new PhabricatorProject())
       ->setAuthorPHID($actor->getPHID())
       ->setIcon($default_icon)
       ->setColor($default_color)
       ->setViewPolicy($view_policy)
       ->setEditPolicy($edit_policy)
       ->setJoinPolicy($join_policy)
       ->setIsMembershipLocked(0)
       ->attachMemberPHIDs(array())
       ->attachSlugs(array())
       ->setHasWorkboard(0)
       ->setHasMilestones(0)
       ->setHasSubprojects(0)
       ->attachParentProject(null);
   }
 
   public function getCapabilities() {
     return array(
       PhabricatorPolicyCapability::CAN_VIEW,
       PhabricatorPolicyCapability::CAN_EDIT,
       PhabricatorPolicyCapability::CAN_JOIN,
     );
   }
 
   public function getPolicy($capability) {
     if ($this->isMilestone()) {
       return $this->getParentProject()->getPolicy($capability);
     }
 
     switch ($capability) {
       case PhabricatorPolicyCapability::CAN_VIEW:
         return $this->getViewPolicy();
       case PhabricatorPolicyCapability::CAN_EDIT:
         return $this->getEditPolicy();
       case PhabricatorPolicyCapability::CAN_JOIN:
         return $this->getJoinPolicy();
     }
   }
 
   public function hasAutomaticCapability($capability, PhabricatorUser $viewer) {
     if ($this->isMilestone()) {
       return $this->getParentProject()->hasAutomaticCapability(
         $capability,
         $viewer);
     }
 
     $can_edit = PhabricatorPolicyCapability::CAN_EDIT;
 
     switch ($capability) {
       case PhabricatorPolicyCapability::CAN_VIEW:
         if ($this->isUserMember($viewer->getPHID())) {
           // Project members can always view a project.
           return true;
         }
         break;
       case PhabricatorPolicyCapability::CAN_EDIT:
         $parent = $this->getParentProject();
         if ($parent) {
           $can_edit_parent = PhabricatorPolicyFilter::hasCapability(
             $viewer,
             $parent,
             $can_edit);
           if ($can_edit_parent) {
             return true;
           }
         }
         break;
       case PhabricatorPolicyCapability::CAN_JOIN:
         if (PhabricatorPolicyFilter::hasCapability($viewer, $this, $can_edit)) {
           // Project editors can always join a project.
           return true;
         }
         break;
     }
 
     return false;
   }
 
   public function describeAutomaticCapability($capability) {
 
     // TODO: Clarify the additional rules that parent and subprojects imply.
 
     switch ($capability) {
       case PhabricatorPolicyCapability::CAN_VIEW:
         return pht('Members of a project can always view it.');
       case PhabricatorPolicyCapability::CAN_JOIN:
         return pht('Users who can edit a project can always join it.');
     }
     return null;
   }
 
   public function getExtendedPolicy($capability, PhabricatorUser $viewer) {
     $extended = array();
 
     switch ($capability) {
       case PhabricatorPolicyCapability::CAN_VIEW:
         $parent = $this->getParentProject();
         if ($parent) {
           $extended[] = array(
             $parent,
             PhabricatorPolicyCapability::CAN_VIEW,
           );
         }
         break;
     }
 
     return $extended;
   }
 
   public function isUserMember($user_phid) {
     if ($this->memberPHIDs !== self::ATTACHABLE) {
       return in_array($user_phid, $this->memberPHIDs);
     }
     return $this->assertAttachedKey($this->sparseMembers, $user_phid);
   }
 
   public function setIsUserMember($user_phid, $is_member) {
     if ($this->sparseMembers === self::ATTACHABLE) {
       $this->sparseMembers = array();
     }
     $this->sparseMembers[$user_phid] = $is_member;
     return $this;
   }
 
   protected function getConfiguration() {
     return array(
       self::CONFIG_AUX_PHID => true,
       self::CONFIG_SERIALIZATION => array(
         'properties' => self::SERIALIZATION_JSON,
       ),
       self::CONFIG_COLUMN_SCHEMA => array(
         'name' => 'sort128',
         'status' => 'text32',
         'primarySlug' => 'text128?',
         'isMembershipLocked' => 'bool',
         'profileImagePHID' => 'phid?',
         'icon' => 'text32',
         'color' => 'text32',
         'mailKey' => 'bytes20',
         'joinPolicy' => 'policy',
         'parentProjectPHID' => 'phid?',
         'hasWorkboard' => 'bool',
         'hasMilestones' => 'bool',
         'hasSubprojects' => 'bool',
         'milestoneNumber' => 'uint32?',
         'projectPath' => 'hashpath64',
         'projectDepth' => 'uint32',
         'projectPathKey' => 'bytes4',
       ),
       self::CONFIG_KEY_SCHEMA => array(
         'key_icon' => array(
           'columns' => array('icon'),
         ),
         'key_color' => array(
           'columns' => array('color'),
         ),
         'key_milestone' => array(
           'columns' => array('parentProjectPHID', 'milestoneNumber'),
           'unique' => true,
         ),
         'key_primaryslug' => array(
           'columns' => array('primarySlug'),
           'unique' => true,
         ),
         'key_path' => array(
           'columns' => array('projectPath', 'projectDepth'),
         ),
         'key_pathkey' => array(
           'columns' => array('projectPathKey'),
           'unique' => true,
         ),
       ),
     ) + parent::getConfiguration();
   }
 
   public function generatePHID() {
     return PhabricatorPHID::generateNewPHID(
       PhabricatorProjectProjectPHIDType::TYPECONST);
   }
 
   public function attachMemberPHIDs(array $phids) {
     $this->memberPHIDs = $phids;
     return $this;
   }
 
   public function getMemberPHIDs() {
     return $this->assertAttached($this->memberPHIDs);
   }
 
   public function isArchived() {
     return ($this->getStatus() == PhabricatorProjectStatus::STATUS_ARCHIVED);
   }
 
   public function getProfileImageURI() {
     return $this->getProfileImageFile()->getBestURI();
   }
 
   public function attachProfileImageFile(PhabricatorFile $file) {
     $this->profileImageFile = $file;
     return $this;
   }
 
   public function getProfileImageFile() {
     return $this->assertAttached($this->profileImageFile);
   }
 
 
   public function isUserWatcher($user_phid) {
     if ($this->watcherPHIDs !== self::ATTACHABLE) {
       return in_array($user_phid, $this->watcherPHIDs);
     }
     return $this->assertAttachedKey($this->sparseWatchers, $user_phid);
   }
 
   public function isUserAncestorWatcher($user_phid) {
     $is_watcher = $this->isUserWatcher($user_phid);
 
     if (!$is_watcher) {
       $parent = $this->getParentProject();
       if ($parent) {
         return $parent->isUserWatcher($user_phid);
       }
     }
 
     return $is_watcher;
   }
 
   public function getWatchedAncestorPHID($user_phid) {
     if ($this->isUserWatcher($user_phid)) {
       return $this->getPHID();
     }
 
     $parent = $this->getParentProject();
     if ($parent) {
       return $parent->getWatchedAncestorPHID($user_phid);
     }
 
     return null;
   }
 
   public function setIsUserWatcher($user_phid, $is_watcher) {
     if ($this->sparseWatchers === self::ATTACHABLE) {
       $this->sparseWatchers = array();
     }
     $this->sparseWatchers[$user_phid] = $is_watcher;
     return $this;
   }
 
   public function attachWatcherPHIDs(array $phids) {
     $this->watcherPHIDs = $phids;
     return $this;
   }
 
   public function getWatcherPHIDs() {
     return $this->assertAttached($this->watcherPHIDs);
   }
 
   public function getAllAncestorWatcherPHIDs() {
     $parent = $this->getParentProject();
     if ($parent) {
       $watchers = $parent->getAllAncestorWatcherPHIDs();
     } else {
       $watchers = array();
     }
 
     foreach ($this->getWatcherPHIDs() as $phid) {
       $watchers[$phid] = $phid;
     }
 
     return $watchers;
   }
 
   public function attachSlugs(array $slugs) {
     $this->slugs = $slugs;
     return $this;
   }
 
   public function getSlugs() {
     return $this->assertAttached($this->slugs);
   }
 
   public function getColor() {
     if ($this->isArchived()) {
       return PHUITagView::COLOR_DISABLED;
     }
 
     return $this->color;
   }
 
   public function getURI() {
     $id = $this->getID();
     return "/project/view/{$id}/";
   }
 
   public function getProfileURI() {
     $id = $this->getID();
     return "/project/profile/{$id}/";
   }
 
   public function save() {
     if (!$this->getMailKey()) {
       $this->setMailKey(Filesystem::readRandomCharacters(20));
     }
 
     if (!strlen($this->getPHID())) {
       $this->setPHID($this->generatePHID());
     }
 
     if (!strlen($this->getProjectPathKey())) {
       $hash = PhabricatorHash::digestForIndex($this->getPHID());
       $hash = substr($hash, 0, 4);
       $this->setProjectPathKey($hash);
     }
 
     $path = array();
     $depth = 0;
     if ($this->parentProjectPHID) {
       $parent = $this->getParentProject();
       $path[] = $parent->getProjectPath();
       $depth = $parent->getProjectDepth() + 1;
     }
     $path[] = $this->getProjectPathKey();
     $path = implode('', $path);
 
     $limit = self::getProjectDepthLimit();
     if ($depth >= $limit) {
       throw new Exception(pht('Project depth is too great.'));
     }
 
     $this->setProjectPath($path);
     $this->setProjectDepth($depth);
 
     $this->openTransaction();
       $result = parent::save();
       $this->updateDatasourceTokens();
     $this->saveTransaction();
 
     return $result;
   }
 
   public static function getProjectDepthLimit() {
     // This is limited by how many path hashes we can fit in the path
     // column.
     return 16;
   }
 
   public function updateDatasourceTokens() {
     $table = self::TABLE_DATASOURCE_TOKEN;
     $conn_w = $this->establishConnection('w');
     $id = $this->getID();
 
     $slugs = queryfx_all(
       $conn_w,
       'SELECT * FROM %T WHERE projectPHID = %s',
       id(new PhabricatorProjectSlug())->getTableName(),
       $this->getPHID());
 
     $all_strings = ipull($slugs, 'slug');
     $all_strings[] = $this->getDisplayName();
     $all_strings = implode(' ', $all_strings);
 
     $tokens = PhabricatorTypeaheadDatasource::tokenizeString($all_strings);
 
     $sql = array();
     foreach ($tokens as $token) {
       $sql[] = qsprintf($conn_w, '(%d, %s)', $id, $token);
     }
 
     $this->openTransaction();
       queryfx(
         $conn_w,
         'DELETE FROM %T WHERE projectID = %d',
         $table,
         $id);
 
       foreach (PhabricatorLiskDAO::chunkSQL($sql) as $chunk) {
         queryfx(
           $conn_w,
           'INSERT INTO %T (projectID, token) VALUES %Q',
           $table,
           $chunk);
       }
     $this->saveTransaction();
   }
 
   public function isMilestone() {
     return ($this->getMilestoneNumber() !== null);
   }
 
   public function getParentProject() {
     return $this->assertAttached($this->parentProject);
   }
 
   public function attachParentProject(PhabricatorProject $project = null) {
     $this->parentProject = $project;
     return $this;
   }
 
   public function getAncestorProjectPaths() {
     $parts = array();
 
     $path = $this->getProjectPath();
     $parent_length = (strlen($path) - 4);
 
     for ($ii = $parent_length; $ii > 0; $ii -= 4) {
       $parts[] = substr($path, 0, $ii);
     }
 
     return $parts;
   }
 
   public function getAncestorProjects() {
     $ancestors = array();
 
     $cursor = $this->getParentProject();
     while ($cursor) {
       $ancestors[] = $cursor;
       $cursor = $cursor->getParentProject();
     }
 
     return $ancestors;
   }
 
   public function supportsEditMembers() {
     if ($this->isMilestone()) {
       return false;
     }
 
     if ($this->getHasSubprojects()) {
       return false;
     }
 
     return true;
   }
 
   public function supportsMilestones() {
     if ($this->isMilestone()) {
       return false;
     }
 
     return true;
   }
 
   public function supportsSubprojects() {
     if ($this->isMilestone()) {
       return false;
     }
 
     return true;
   }
 
   public function loadNextMilestoneNumber() {
     $current = queryfx_one(
       $this->establishConnection('w'),
       'SELECT MAX(milestoneNumber) n
         FROM %T
         WHERE parentProjectPHID = %s',
       $this->getTableName(),
       $this->getPHID());
 
     if (!$current) {
       $number = 1;
     } else {
       $number = (int)$current['n'] + 1;
     }
 
     return $number;
   }
 
   public function getDisplayName() {
     $name = $this->getName();
 
     // If this is a milestone, show it as "Parent > Sprint 99".
     if ($this->isMilestone()) {
       $name = pht(
         '%s (%s)',
         $this->getParentProject()->getName(),
         $name);
     }
 
     return $name;
   }
 
   public function getDisplayIconKey() {
     if ($this->isMilestone()) {
       $key = PhabricatorProjectIconSet::getMilestoneIconKey();
     } else {
       $key = $this->getIcon();
     }
 
     return $key;
   }
 
   public function getDisplayIconIcon() {
     $key = $this->getDisplayIconKey();
     return PhabricatorProjectIconSet::getIconIcon($key);
   }
 
   public function getDisplayIconName() {
     $key = $this->getDisplayIconKey();
     return PhabricatorProjectIconSet::getIconName($key);
   }
 
   public function getDisplayColor() {
     if ($this->isMilestone()) {
       return $this->getParentProject()->getColor();
     }
 
     return $this->getColor();
   }
 
   public function getDisplayIconComposeIcon() {
     $icon = $this->getDisplayIconIcon();
     return $icon;
   }
 
   public function getDisplayIconComposeColor() {
     $color = $this->getDisplayColor();
 
     $map = array(
       'grey' => 'charcoal',
       'checkered' => 'backdrop',
     );
 
     return idx($map, $color, $color);
   }
 
   public function getProperty($key, $default = null) {
     return idx($this->properties, $key, $default);
   }
 
   public function setProperty($key, $value) {
     $this->properties[$key] = $value;
     return $this;
   }
 
   public function getDefaultWorkboardSort() {
     return $this->getProperty('workboard.sort.default');
   }
 
   public function setDefaultWorkboardSort($sort) {
     return $this->setProperty('workboard.sort.default', $sort);
   }
 
   public function getDefaultWorkboardFilter() {
     return $this->getProperty('workboard.filter.default');
   }
 
   public function setDefaultWorkboardFilter($filter) {
     return $this->setProperty('workboard.filter.default', $filter);
   }
 
   public function getWorkboardBackgroundColor() {
     return $this->getProperty('workboard.background');
   }
 
   public function setWorkboardBackgroundColor($color) {
     return $this->setProperty('workboard.background', $color);
   }
 
   public function getDisplayWorkboardBackgroundColor() {
     $color = $this->getWorkboardBackgroundColor();
 
     if ($color === null) {
       $parent = $this->getParentProject();
       if ($parent) {
         return $parent->getDisplayWorkboardBackgroundColor();
       }
     }
 
     if ($color === 'none') {
       $color = null;
     }
 
     return $color;
   }
 
 
 /* -(  PhabricatorCustomFieldInterface  )------------------------------------ */
 
 
   public function getCustomFieldSpecificationForRole($role) {
     return PhabricatorEnv::getEnvConfig('projects.fields');
   }
 
   public function getCustomFieldBaseClass() {
     return 'PhabricatorProjectCustomField';
   }
 
   public function getCustomFields() {
     return $this->assertAttached($this->customFields);
   }
 
   public function attachCustomFields(PhabricatorCustomFieldAttachment $fields) {
     $this->customFields = $fields;
     return $this;
   }
 
 
 /* -(  PhabricatorApplicationTransactionInterface  )------------------------- */
 
 
   public function getApplicationTransactionEditor() {
     return new PhabricatorProjectTransactionEditor();
   }
 
   public function getApplicationTransactionObject() {
     return $this;
   }
 
   public function getApplicationTransactionTemplate() {
     return new PhabricatorProjectTransaction();
   }
 
   public function willRenderTimeline(
     PhabricatorApplicationTransactionView $timeline,
     AphrontRequest $request) {
 
     return $timeline;
   }
 
 
 /* -(  PhabricatorDestructibleInterface  )----------------------------------- */
 
 
   public function destroyObjectPermanently(
     PhabricatorDestructionEngine $engine) {
 
     $this->openTransaction();
       $this->delete();
 
       $columns = id(new PhabricatorProjectColumn())
         ->loadAllWhere('projectPHID = %s', $this->getPHID());
       foreach ($columns as $column) {
         $engine->destroyObject($column);
       }
 
       $slugs = id(new PhabricatorProjectSlug())
         ->loadAllWhere('projectPHID = %s', $this->getPHID());
       foreach ($slugs as $slug) {
         $slug->delete();
       }
 
     $this->saveTransaction();
   }
 
 
 /* -(  PhabricatorFulltextInterface  )--------------------------------------- */
 
 
   public function newFulltextEngine() {
     return new PhabricatorProjectFulltextEngine();
   }
 
 
 /* -(  PhabricatorConduitResultInterface  )---------------------------------- */
 
 
   public function getFieldSpecificationsForConduit() {
     return array(
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('name')
         ->setType('string')
         ->setDescription(pht('The name of the project.')),
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('slug')
         ->setType('string')
         ->setDescription(pht('Primary slug/hashtag.')),
+      id(new PhabricatorConduitSearchFieldSpecification())
+        ->setKey('milestone')
+        ->setType('int?')
+        ->setDescription(pht('For milestones, milestone sequence number.')),
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('icon')
         ->setType('map<string, wild>')
         ->setDescription(pht('Information about the project icon.')),
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('color')
         ->setType('map<string, wild>')
         ->setDescription(pht('Information about the project color.')),
     );
   }
 
   public function getFieldValuesForConduit() {
     $color_key = $this->getColor();
     $color_name = PhabricatorProjectIconSet::getColorName($color_key);
 
+    if ($this->isMilestone()) {
+      $milestone = (int)$this->getMilestoneNumber();
+    } else {
+      $milestone = null;
+    }
+
     return array(
       'name' => $this->getName(),
       'slug' => $this->getPrimarySlug(),
+      'milestone' => $milestone,
       'icon' => array(
         'key' => $this->getDisplayIconKey(),
         'name' => $this->getDisplayIconName(),
         'icon' => $this->getDisplayIconIcon(),
       ),
       'color' => array(
         'key' => $color_key,
         'name' => $color_name,
       ),
     );
   }
 
   public function getConduitSearchAttachments() {
     return array(
       id(new PhabricatorProjectsMembersSearchEngineAttachment())
         ->setAttachmentKey('members'),
       id(new PhabricatorProjectsWatchersSearchEngineAttachment())
         ->setAttachmentKey('watchers'),
     );
   }
 
 
 /* -(  PhabricatorColumnProxyInterface  )------------------------------------ */
 
 
   public function getProxyColumnName() {
     return $this->getName();
   }
 
   public function getProxyColumnIcon() {
     return $this->getDisplayIconIcon();
   }
 
   public function getProxyColumnClass() {
     if ($this->isMilestone()) {
       return 'phui-workboard-column-milestone';
     }
 
     return null;
   }
 
 
 }