diff --git a/src/applications/calendar/storage/PhabricatorCalendarEvent.php b/src/applications/calendar/storage/PhabricatorCalendarEvent.php
index b2e81b0e8b..e566a77b76 100644
--- a/src/applications/calendar/storage/PhabricatorCalendarEvent.php
+++ b/src/applications/calendar/storage/PhabricatorCalendarEvent.php
@@ -1,1447 +1,1446 @@
 <?php
 
 final class PhabricatorCalendarEvent extends PhabricatorCalendarDAO
   implements
     PhabricatorPolicyInterface,
     PhabricatorExtendedPolicyInterface,
     PhabricatorPolicyCodexInterface,
     PhabricatorProjectInterface,
     PhabricatorMarkupInterface,
     PhabricatorApplicationTransactionInterface,
     PhabricatorSubscribableInterface,
     PhabricatorTokenReceiverInterface,
     PhabricatorDestructibleInterface,
     PhabricatorMentionableInterface,
     PhabricatorFlaggableInterface,
     PhabricatorSpacesInterface,
     PhabricatorFulltextInterface,
     PhabricatorConduitResultInterface {
 
   protected $name;
   protected $hostPHID;
   protected $description;
   protected $isCancelled;
   protected $isAllDay;
   protected $icon;
   protected $mailKey;
   protected $isStub;
 
   protected $isRecurring = 0;
 
   protected $seriesParentPHID;
   protected $instanceOfEventPHID;
   protected $sequenceIndex;
 
   protected $viewPolicy;
   protected $editPolicy;
 
   protected $spacePHID;
 
   protected $utcInitialEpoch;
   protected $utcUntilEpoch;
   protected $utcInstanceEpoch;
   protected $parameters = array();
 
   protected $importAuthorPHID;
   protected $importSourcePHID;
   protected $importUIDIndex;
   protected $importUID;
 
   private $parentEvent = self::ATTACHABLE;
   private $invitees = self::ATTACHABLE;
   private $importSource = self::ATTACHABLE;
   private $rsvps = self::ATTACHABLE;
 
   private $viewerTimezone;
 
   private $isGhostEvent = false;
   private $stubInvitees;
 
   public static function initializeNewCalendarEvent(PhabricatorUser $actor) {
     $app = id(new PhabricatorApplicationQuery())
       ->setViewer($actor)
       ->withClasses(array('PhabricatorCalendarApplication'))
       ->executeOne();
 
     $view_default = PhabricatorCalendarEventDefaultViewCapability::CAPABILITY;
     $edit_default = PhabricatorCalendarEventDefaultEditCapability::CAPABILITY;
     $view_policy = $app->getPolicy($view_default);
     $edit_policy = $app->getPolicy($edit_default);
 
     $now = PhabricatorTime::getNow();
 
     $default_icon = 'fa-calendar';
 
     $datetime_defaults = self::newDefaultEventDateTimes(
       $actor,
       $now);
     list($datetime_start, $datetime_end) = $datetime_defaults;
 
     // When importing events from a context like "bin/calendar reload", we may
     // be acting as the omnipotent user.
     $host_phid = $actor->getPHID();
     if (!$host_phid) {
       $host_phid = $app->getPHID();
     }
 
     return id(new PhabricatorCalendarEvent())
       ->setDescription('')
       ->setHostPHID($host_phid)
       ->setIsCancelled(0)
       ->setIsAllDay(0)
       ->setIsStub(0)
       ->setIsRecurring(0)
       ->setIcon($default_icon)
       ->setViewPolicy($view_policy)
       ->setEditPolicy($edit_policy)
       ->setSpacePHID($actor->getDefaultSpacePHID())
       ->attachInvitees(array())
       ->setStartDateTime($datetime_start)
       ->setEndDateTime($datetime_end)
       ->attachImportSource(null)
       ->applyViewerTimezone($actor);
   }
 
   public static function newDefaultEventDateTimes(
     PhabricatorUser $viewer,
     $now) {
 
     $datetime_start = PhutilCalendarAbsoluteDateTime::newFromEpoch(
       $now,
       $viewer->getTimezoneIdentifier());
 
     // Advance the time by an hour, then round downwards to the nearest hour.
     // For example, if it is currently 3:25 PM, we suggest a default start time
     // of 4 PM.
     $datetime_start = $datetime_start
       ->newRelativeDateTime('PT1H')
       ->newAbsoluteDateTime();
     $datetime_start->setMinute(0);
     $datetime_start->setSecond(0);
 
     // Default the end time to an hour after the start time.
     $datetime_end = $datetime_start
       ->newRelativeDateTime('PT1H')
       ->newAbsoluteDateTime();
 
     return array($datetime_start, $datetime_end);
   }
 
   private function newChild(
     PhabricatorUser $actor,
     $sequence,
     PhutilCalendarDateTime $start = null) {
     if (!$this->isParentEvent()) {
       throw new Exception(
         pht(
           'Unable to generate a new child event for an event which is not '.
           'a recurring parent event!'));
     }
 
     $series_phid = $this->getSeriesParentPHID();
     if (!$series_phid) {
       $series_phid = $this->getPHID();
     }
 
     $child = id(new self())
       ->setIsCancelled(0)
       ->setIsStub(0)
       ->setInstanceOfEventPHID($this->getPHID())
       ->setSeriesParentPHID($series_phid)
       ->setSequenceIndex($sequence)
       ->setIsRecurring(true)
       ->attachParentEvent($this)
       ->attachImportSource(null);
 
     return $child->copyFromParent($actor, $start);
   }
 
   protected function readField($field) {
     static $inherit = array(
       'hostPHID' => true,
       'isAllDay' => true,
       'icon' => true,
       'spacePHID' => true,
       'viewPolicy' => true,
       'editPolicy' => true,
       'name' => true,
       'description' => true,
       'isCancelled' => true,
     );
 
     // Read these fields from the parent event instead of this event. For
     // example, we want any changes to the parent event's name to apply to
     // the child.
     if (isset($inherit[$field])) {
       if ($this->getIsStub()) {
         // TODO: This should be unconditional, but the execution order of
         // CalendarEventQuery and applyViewerTimezone() are currently odd.
         if ($this->parentEvent !== self::ATTACHABLE) {
           return $this->getParentEvent()->readField($field);
         }
       }
     }
 
     return parent::readField($field);
   }
 
 
   public function copyFromParent(
     PhabricatorUser $actor,
     PhutilCalendarDateTime $start = null) {
 
     if (!$this->isChildEvent()) {
       throw new Exception(
         pht(
           'Unable to copy from parent event: this is not a child event.'));
     }
 
     $parent = $this->getParentEvent();
 
     $this
       ->setHostPHID($parent->getHostPHID())
       ->setIsAllDay($parent->getIsAllDay())
       ->setIcon($parent->getIcon())
       ->setSpacePHID($parent->getSpacePHID())
       ->setViewPolicy($parent->getViewPolicy())
       ->setEditPolicy($parent->getEditPolicy())
       ->setName($parent->getName())
       ->setDescription($parent->getDescription())
       ->setIsCancelled($parent->getIsCancelled());
 
     if ($start) {
       $start_datetime = $start;
     } else {
       $sequence = $this->getSequenceIndex();
       $start_datetime = $parent->newSequenceIndexDateTime($sequence);
 
       if (!$start_datetime) {
         throw new Exception(
           pht(
             'Sequence "%s" is not valid for event!',
             $sequence));
       }
     }
 
     $duration = $parent->newDuration();
     $end_datetime = $start_datetime->newRelativeDateTime($duration);
 
     $this
       ->setStartDateTime($start_datetime)
       ->setEndDateTime($end_datetime);
 
     if ($parent->isImportedEvent()) {
       $full_uid = $parent->getImportUID().'/'.$start_datetime->getEpoch();
 
       // NOTE: We don't attach the import source because this gets called
       // from CalendarEventQuery while building ghosts, before we've loaded
       // and attached sources. Possibly this sequence should be flipped.
 
       $this
         ->setImportAuthorPHID($parent->getImportAuthorPHID())
         ->setImportSourcePHID($parent->getImportSourcePHID())
         ->setImportUID($full_uid);
     }
 
     return $this;
   }
 
   public function isValidSequenceIndex(PhabricatorUser $viewer, $sequence) {
     return (bool)$this->newSequenceIndexDateTime($sequence);
   }
 
   public function newSequenceIndexDateTime($sequence) {
     $set = $this->newRecurrenceSet();
     if (!$set) {
       return null;
     }
 
     $limit = $sequence + 1;
     $count = $this->getRecurrenceCount();
     if ($count && ($count < $limit)) {
       return null;
     }
 
     $instances = $set->getEventsBetween(
       null,
       $this->newUntilDateTime(),
       $limit);
 
     return idx($instances, $sequence, null);
   }
 
   public function newStub(PhabricatorUser $actor, $sequence) {
     $stub = $this->newChild($actor, $sequence);
 
     $stub->setIsStub(1);
 
     $unguarded = AphrontWriteGuard::beginScopedUnguardedWrites();
       $stub->save();
     unset($unguarded);
 
     $stub->applyViewerTimezone($actor);
 
     return $stub;
   }
 
   public function newGhost(
     PhabricatorUser $actor,
     $sequence,
     PhutilCalendarDateTime $start = null) {
 
     $ghost = $this->newChild($actor, $sequence, $start);
 
     $ghost
       ->setIsGhostEvent(true)
       ->makeEphemeral();
 
     $ghost->applyViewerTimezone($actor);
 
     return $ghost;
   }
 
   public function applyViewerTimezone(PhabricatorUser $viewer) {
     $this->viewerTimezone = $viewer->getTimezoneIdentifier();
     return $this;
   }
 
   public function getDuration() {
     return ($this->getEndDateTimeEpoch() - $this->getStartDateTimeEpoch());
   }
 
   public function updateUTCEpochs() {
     // The "intitial" epoch is the start time of the event, in UTC.
     $start_date = $this->newStartDateTime()
       ->setViewerTimezone('UTC');
     $start_epoch = $start_date->getEpoch();
     $this->setUTCInitialEpoch($start_epoch);
 
     // The "until" epoch is the last UTC epoch on which any instance of this
     // event occurs. For infinitely recurring events, it is `null`.
 
     if (!$this->getIsRecurring()) {
       $end_date = $this->newEndDateTime()
         ->setViewerTimezone('UTC');
       $until_epoch = $end_date->getEpoch();
     } else {
       $until_epoch = null;
       $until_date = $this->newUntilDateTime();
       if ($until_date) {
         $until_date->setViewerTimezone('UTC');
         $duration = $this->newDuration();
         $until_epoch = id(new PhutilCalendarRelativeDateTime())
           ->setOrigin($until_date)
           ->setDuration($duration)
           ->getEpoch();
       }
     }
     $this->setUTCUntilEpoch($until_epoch);
 
     // The "instance" epoch is a property of instances of recurring events.
     // It's the original UTC epoch on which the instance started. Usually that
     // is the same as the start date, but they may be different if the instance
     // has been edited.
 
     // The ICS format uses this value (original start time) to identify event
     // instances, and must do so because it allows additional arbitrary
     // instances to be added (with "RDATE").
 
     $instance_epoch = null;
     $instance_date = $this->newInstanceDateTime();
     if ($instance_date) {
       $instance_epoch = $instance_date
         ->setViewerTimezone('UTC')
         ->getEpoch();
     }
     $this->setUTCInstanceEpoch($instance_epoch);
 
     return $this;
   }
 
   public function save() {
     if (!$this->mailKey) {
       $this->mailKey = Filesystem::readRandomCharacters(20);
     }
 
     $import_uid = $this->getImportUID();
     if ($import_uid !== null) {
       $index = PhabricatorHash::digestForIndex($import_uid);
     } else {
       $index = null;
     }
     $this->setImportUIDIndex($index);
 
     $this->updateUTCEpochs();
 
     return parent::save();
   }
 
   /**
    * Get the event start epoch for evaluating invitee availability.
    *
    * When assessing availability, we pretend events start earlier than they
    * really do. This allows us to mark users away for the entire duration of a
    * series of back-to-back meetings, even if they don't strictly overlap.
    *
    * @return int Event start date for availability caches.
    */
   public function getStartDateTimeEpochForCache() {
     $epoch = $this->getStartDateTimeEpoch();
     $window = phutil_units('15 minutes in seconds');
     return ($epoch - $window);
   }
 
   protected function getConfiguration() {
     return array(
       self::CONFIG_AUX_PHID => true,
       self::CONFIG_COLUMN_SCHEMA => array(
         'name' => 'text',
         'description' => 'text',
         'isCancelled' => 'bool',
         'isAllDay' => 'bool',
         'icon' => 'text32',
         'mailKey' => 'bytes20',
         'isRecurring' => 'bool',
         'seriesParentPHID' => 'phid?',
         'instanceOfEventPHID' => 'phid?',
         'sequenceIndex' => 'uint32?',
         'isStub' => 'bool',
         'utcInitialEpoch' => 'epoch',
         'utcUntilEpoch' => 'epoch?',
         'utcInstanceEpoch' => 'epoch?',
 
         'importAuthorPHID' => 'phid?',
         'importSourcePHID' => 'phid?',
         'importUIDIndex' => 'bytes12?',
         'importUID' => 'text?',
       ),
       self::CONFIG_KEY_SCHEMA => array(
         'key_instance' => array(
           'columns' => array('instanceOfEventPHID', 'sequenceIndex'),
           'unique' => true,
         ),
         'key_epoch' => array(
           'columns' => array('utcInitialEpoch', 'utcUntilEpoch'),
         ),
         'key_rdate' => array(
           'columns' => array('instanceOfEventPHID', 'utcInstanceEpoch'),
           'unique' => true,
         ),
         'key_series' => array(
           'columns' => array('seriesParentPHID', 'utcInitialEpoch'),
         ),
       ),
       self::CONFIG_SERIALIZATION => array(
         'parameters' => self::SERIALIZATION_JSON,
       ),
     ) + parent::getConfiguration();
   }
 
   public function generatePHID() {
     return PhabricatorPHID::generateNewPHID(
       PhabricatorCalendarEventPHIDType::TYPECONST);
   }
 
   public function getMonogram() {
     return 'E'.$this->getID();
   }
 
   public function getInvitees() {
     if ($this->getIsGhostEvent() || $this->getIsStub()) {
       if ($this->stubInvitees === null) {
         $this->stubInvitees = $this->newStubInvitees();
       }
       return $this->stubInvitees;
     }
 
     return $this->assertAttached($this->invitees);
   }
 
   public function getInviteeForPHID($phid) {
     $invitees = $this->getInvitees();
     $invitees = mpull($invitees, null, 'getInviteePHID');
     return idx($invitees, $phid);
   }
 
   public static function getFrequencyMap() {
     return array(
       PhutilCalendarRecurrenceRule::FREQUENCY_DAILY => array(
         'label' => pht('Daily'),
       ),
       PhutilCalendarRecurrenceRule::FREQUENCY_WEEKLY => array(
         'label' => pht('Weekly'),
       ),
       PhutilCalendarRecurrenceRule::FREQUENCY_MONTHLY => array(
         'label' => pht('Monthly'),
       ),
       PhutilCalendarRecurrenceRule::FREQUENCY_YEARLY => array(
         'label' => pht('Yearly'),
       ),
     );
   }
 
   private function newStubInvitees() {
     $parent = $this->getParentEvent();
 
     $parent_invitees = $parent->getInvitees();
     $stub_invitees = array();
 
     foreach ($parent_invitees as $invitee) {
       $stub_invitee = id(new PhabricatorCalendarEventInvitee())
         ->setInviteePHID($invitee->getInviteePHID())
         ->setInviterPHID($invitee->getInviterPHID())
         ->setStatus(PhabricatorCalendarEventInvitee::STATUS_INVITED);
 
       $stub_invitees[] = $stub_invitee;
     }
 
     return $stub_invitees;
   }
 
   public function attachInvitees(array $invitees) {
     $this->invitees = $invitees;
     return $this;
   }
 
   public function getInviteePHIDsForEdit() {
     $invitees = array();
 
     foreach ($this->getInvitees() as $invitee) {
       if ($invitee->isUninvited()) {
         continue;
       }
       $invitees[] = $invitee->getInviteePHID();
     }
 
     return $invitees;
   }
 
   public function getUserInviteStatus($phid) {
     $invitees = $this->getInvitees();
     $invitees = mpull($invitees, null, 'getInviteePHID');
 
     $invited = idx($invitees, $phid);
     if (!$invited) {
       return PhabricatorCalendarEventInvitee::STATUS_UNINVITED;
     }
 
     $invited = $invited->getStatus();
     return $invited;
   }
 
   public function getIsUserAttending($phid) {
     $attending_status = PhabricatorCalendarEventInvitee::STATUS_ATTENDING;
 
     $old_status = $this->getUserInviteStatus($phid);
     $is_attending = ($old_status == $attending_status);
 
     return $is_attending;
   }
 
   public function getIsGhostEvent() {
     return $this->isGhostEvent;
   }
 
   public function setIsGhostEvent($is_ghost_event) {
     $this->isGhostEvent = $is_ghost_event;
     return $this;
   }
 
   public function getURI() {
     if ($this->getIsGhostEvent()) {
       $base = $this->getParentEvent()->getURI();
       $sequence = $this->getSequenceIndex();
       return "{$base}/{$sequence}/";
     }
 
     return '/'.$this->getMonogram();
   }
 
   public function getParentEvent() {
     return $this->assertAttached($this->parentEvent);
   }
 
   public function attachParentEvent(PhabricatorCalendarEvent $event = null) {
     $this->parentEvent = $event;
     return $this;
   }
 
   public function isParentEvent() {
     return ($this->getIsRecurring() && !$this->getInstanceOfEventPHID());
   }
 
   public function isChildEvent() {
     return ($this->instanceOfEventPHID !== null);
   }
 
   public function renderEventDate(
     PhabricatorUser $viewer,
     $show_end) {
 
     $start = $this->newStartDateTime();
     $end = $this->newEndDateTime();
 
     $min_date = $start->newPHPDateTime();
     $max_date = $end->newPHPDateTime();
 
     if ($this->getIsAllDay()) {
       // Subtract one second since the stored date is exclusive.
       $max_date = $max_date->modify('-1 second');
     }
 
     if ($show_end) {
       $min_day = $min_date->format('Y m d');
       $max_day = $max_date->format('Y m d');
 
       $show_end_date = ($min_day != $max_day);
     } else {
       $show_end_date = false;
     }
 
     $min_epoch = $min_date->format('U');
     $max_epoch = $max_date->format('U');
 
     if ($this->getIsAllDay()) {
       if ($show_end_date) {
         return pht(
           '%s - %s, All Day',
           phabricator_date($min_epoch, $viewer),
           phabricator_date($max_epoch, $viewer));
       } else {
         return pht(
           '%s, All Day',
           phabricator_date($min_epoch, $viewer));
       }
     } else if ($show_end_date) {
       return pht(
         '%s - %s',
         phabricator_datetime($min_epoch, $viewer),
         phabricator_datetime($max_epoch, $viewer));
     } else if ($show_end) {
       return pht(
         '%s - %s',
         phabricator_datetime($min_epoch, $viewer),
         phabricator_time($max_epoch, $viewer));
     } else {
       return pht(
         '%s',
         phabricator_datetime($min_epoch, $viewer));
     }
   }
 
 
   public function getDisplayIcon(PhabricatorUser $viewer) {
     if ($this->getIsCancelled()) {
       return 'fa-times';
     }
 
     if ($viewer->isLoggedIn()) {
       $viewer_phid = $viewer->getPHID();
       if ($this->isRSVPInvited($viewer_phid)) {
         return 'fa-users';
       } else {
         $status = $this->getUserInviteStatus($viewer_phid);
         switch ($status) {
           case PhabricatorCalendarEventInvitee::STATUS_ATTENDING:
             return 'fa-check-circle';
           case PhabricatorCalendarEventInvitee::STATUS_INVITED:
             return 'fa-user-plus';
           case PhabricatorCalendarEventInvitee::STATUS_DECLINED:
             return 'fa-times-circle';
         }
       }
     }
 
     if ($this->isImportedEvent()) {
       return 'fa-download';
     }
 
     return $this->getIcon();
   }
 
   public function getDisplayIconColor(PhabricatorUser $viewer) {
     if ($this->getIsCancelled()) {
       return 'red';
     }
 
     if ($this->isImportedEvent()) {
       return 'orange';
     }
 
     if ($viewer->isLoggedIn()) {
       $viewer_phid = $viewer->getPHID();
       if ($this->isRSVPInvited($viewer_phid)) {
         return 'green';
       }
 
       $status = $this->getUserInviteStatus($viewer_phid);
       switch ($status) {
         case PhabricatorCalendarEventInvitee::STATUS_ATTENDING:
           return 'green';
         case PhabricatorCalendarEventInvitee::STATUS_INVITED:
           return 'green';
         case PhabricatorCalendarEventInvitee::STATUS_DECLINED:
           return 'grey';
       }
     }
 
     return 'bluegrey';
   }
 
   public function getDisplayIconLabel(PhabricatorUser $viewer) {
     if ($this->getIsCancelled()) {
       return pht('Cancelled');
     }
 
     if ($viewer->isLoggedIn()) {
       $status = $this->getUserInviteStatus($viewer->getPHID());
       switch ($status) {
         case PhabricatorCalendarEventInvitee::STATUS_ATTENDING:
           return pht('Attending');
         case PhabricatorCalendarEventInvitee::STATUS_INVITED:
           return pht('Invited');
         case PhabricatorCalendarEventInvitee::STATUS_DECLINED:
           return pht('Declined');
       }
     }
 
     return null;
   }
 
   public function getICSFilename() {
     return $this->getMonogram().'.ics';
   }
 
   public function newIntermediateEventNode(
     PhabricatorUser $viewer,
     array $children) {
 
     $base_uri = new PhutilURI(PhabricatorEnv::getProductionURI('/'));
     $domain = $base_uri->getDomain();
 
     // NOTE: For recurring events, all of the events in the series have the
     // same UID (the UID of the parent). The child event instances are
     // differentiated by the "RECURRENCE-ID" field.
     if ($this->isChildEvent()) {
       $parent = $this->getParentEvent();
       $instance_datetime = PhutilCalendarAbsoluteDateTime::newFromEpoch(
         $this->getUTCInstanceEpoch());
       $recurrence_id = $instance_datetime->getISO8601();
       $rrule = null;
     } else {
       $parent = $this;
       $recurrence_id = null;
       $rrule = $this->newRecurrenceRule();
     }
     $uid = $parent->getPHID().'@'.$domain;
 
     $created = $this->getDateCreated();
     $created = PhutilCalendarAbsoluteDateTime::newFromEpoch($created);
 
     $modified = $this->getDateModified();
     $modified = PhutilCalendarAbsoluteDateTime::newFromEpoch($modified);
 
     $date_start = $this->newStartDateTime();
     $date_end = $this->newEndDateTime();
 
     if ($this->getIsAllDay()) {
       $date_start->setIsAllDay(true);
       $date_end->setIsAllDay(true);
     }
 
     $host_phid = $this->getHostPHID();
 
     $invitees = $this->getInvitees();
     foreach ($invitees as $key => $invitee) {
       if ($invitee->isUninvited()) {
         unset($invitees[$key]);
       }
     }
 
     $phids = array();
     $phids[] = $host_phid;
     foreach ($invitees as $invitee) {
       $phids[] = $invitee->getInviteePHID();
     }
 
     $handles = $viewer->loadHandles($phids);
 
     $host_handle = $handles[$host_phid];
     $host_name = $host_handle->getFullName();
 
     // NOTE: Gmail shows "Who: Unknown Organizer*" if the organizer URI does
     // not look like an email address. Use a synthetic address so it shows
     // the host name instead.
     $install_uri = PhabricatorEnv::getProductionURI('/');
     $install_uri = new PhutilURI($install_uri);
 
     // This should possibly use "metamta.reply-handler-domain" instead, but
     // we do not currently accept mail for users anyway, and that option may
     // not be configured.
     $mail_domain = $install_uri->getDomain();
     $host_uri = "mailto:{$host_phid}@{$mail_domain}";
 
     $organizer = id(new PhutilCalendarUserNode())
       ->setName($host_name)
       ->setURI($host_uri);
 
     $attendees = array();
     foreach ($invitees as $invitee) {
       $invitee_phid = $invitee->getInviteePHID();
       $invitee_handle = $handles[$invitee_phid];
       $invitee_name = $invitee_handle->getFullName();
       $invitee_uri = $invitee_handle->getURI();
       $invitee_uri = PhabricatorEnv::getURI($invitee_uri);
 
       switch ($invitee->getStatus()) {
         case PhabricatorCalendarEventInvitee::STATUS_ATTENDING:
           $status = PhutilCalendarUserNode::STATUS_ACCEPTED;
           break;
         case PhabricatorCalendarEventInvitee::STATUS_DECLINED:
           $status = PhutilCalendarUserNode::STATUS_DECLINED;
           break;
         case PhabricatorCalendarEventInvitee::STATUS_INVITED:
         default:
           $status = PhutilCalendarUserNode::STATUS_INVITED;
           break;
       }
 
       $attendees[] = id(new PhutilCalendarUserNode())
         ->setName($invitee_name)
         ->setURI($invitee_uri)
         ->setStatus($status);
     }
 
     // TODO: Use $children to generate EXDATE/RDATE information.
 
     $node = id(new PhutilCalendarEventNode())
       ->setUID($uid)
       ->setName($this->getName())
       ->setDescription($this->getDescription())
       ->setCreatedDateTime($created)
       ->setModifiedDateTime($modified)
       ->setStartDateTime($date_start)
       ->setEndDateTime($date_end)
       ->setOrganizer($organizer)
       ->setAttendees($attendees);
 
     if ($rrule) {
       $node->setRecurrenceRule($rrule);
     }
 
     if ($recurrence_id) {
       $node->setRecurrenceID($recurrence_id);
     }
 
     return $node;
   }
 
   public function newStartDateTime() {
     $datetime = $this->getParameter('startDateTime');
     return $this->newDateTimeFromDictionary($datetime);
   }
 
   public function getStartDateTimeEpoch() {
     return $this->newStartDateTime()->getEpoch();
   }
 
   public function newEndDateTimeForEdit() {
     $datetime = $this->getParameter('endDateTime');
     return $this->newDateTimeFromDictionary($datetime);
   }
 
   public function newEndDateTime() {
     $datetime = $this->newEndDateTimeForEdit();
 
     // If this is an all day event, we move the end date time forward to the
     // first second of the following day. This is consistent with what users
     // expect: an all day event from "Nov 1" to "Nov 1" lasts the entire day.
 
     // For imported events, the end date is already stored with this
     // adjustment.
 
     if ($this->getIsAllDay() && !$this->isImportedEvent()) {
       $datetime = $datetime
         ->newAbsoluteDateTime()
         ->setHour(0)
         ->setMinute(0)
         ->setSecond(0)
         ->newRelativeDateTime('P1D')
         ->newAbsoluteDateTime();
     }
 
     return $datetime;
   }
 
   public function getEndDateTimeEpoch() {
     return $this->newEndDateTime()->getEpoch();
   }
 
   public function newUntilDateTime() {
     $datetime = $this->getParameter('untilDateTime');
     if ($datetime) {
       return $this->newDateTimeFromDictionary($datetime);
     }
 
     return null;
   }
 
   public function getUntilDateTimeEpoch() {
     $datetime = $this->newUntilDateTime();
 
     if (!$datetime) {
       return null;
     }
 
     return $datetime->getEpoch();
   }
 
   public function newDuration() {
     return id(new PhutilCalendarDuration())
       ->setSeconds($this->getDuration());
   }
 
   public function newInstanceDateTime() {
     if (!$this->getIsRecurring()) {
       return null;
     }
 
     $index = $this->getSequenceIndex();
     if (!$index) {
       return null;
     }
 
     return $this->newSequenceIndexDateTime($index);
   }
 
   private function newDateTimeFromEpoch($epoch) {
     $datetime = PhutilCalendarAbsoluteDateTime::newFromEpoch($epoch);
 
     if ($this->getIsAllDay()) {
       $datetime->setIsAllDay(true);
     }
 
     return $this->newDateTimeFromDateTime($datetime);
   }
 
   private function newDateTimeFromDictionary(array $dict) {
     $datetime = PhutilCalendarAbsoluteDateTime::newFromDictionary($dict);
     return $this->newDateTimeFromDateTime($datetime);
   }
 
   private function newDateTimeFromDateTime(PhutilCalendarDateTime $datetime) {
     $viewer_timezone = $this->viewerTimezone;
     if ($viewer_timezone) {
       $datetime->setViewerTimezone($viewer_timezone);
     }
 
     return $datetime;
   }
 
   public function getParameter($key, $default = null) {
     return idx($this->parameters, $key, $default);
   }
 
   public function setParameter($key, $value) {
     $this->parameters[$key] = $value;
     return $this;
   }
 
   public function setStartDateTime(PhutilCalendarDateTime $datetime) {
     return $this->setParameter(
       'startDateTime',
       $datetime->newAbsoluteDateTime()->toDictionary());
   }
 
   public function setEndDateTime(PhutilCalendarDateTime $datetime) {
     return $this->setParameter(
       'endDateTime',
       $datetime->newAbsoluteDateTime()->toDictionary());
   }
 
   public function setUntilDateTime(PhutilCalendarDateTime $datetime = null) {
     if ($datetime) {
       $value = $datetime->newAbsoluteDateTime()->toDictionary();
     } else {
       $value = null;
     }
 
     return $this->setParameter('untilDateTime', $value);
   }
 
   public function setRecurrenceRule(PhutilCalendarRecurrenceRule $rrule) {
     return $this->setParameter(
       'recurrenceRule',
       $rrule->toDictionary());
   }
 
   public function newRecurrenceRule() {
     if ($this->isChildEvent()) {
       return $this->getParentEvent()->newRecurrenceRule();
     }
 
     if (!$this->getIsRecurring()) {
       return null;
     }
 
     $dict = $this->getParameter('recurrenceRule');
     if (!$dict) {
       return null;
     }
 
     $rrule = PhutilCalendarRecurrenceRule::newFromDictionary($dict);
 
     $start = $this->newStartDateTime();
     $rrule->setStartDateTime($start);
 
     $until = $this->newUntilDateTime();
     if ($until) {
       $rrule->setUntil($until);
     }
 
     $count = $this->getRecurrenceCount();
     if ($count) {
       $rrule->setCount($count);
     }
 
     return $rrule;
   }
 
   public function getRecurrenceCount() {
     $count = (int)$this->getParameter('recurrenceCount');
 
     if (!$count) {
       return null;
     }
 
     return $count;
   }
 
   public function newRecurrenceSet() {
     if ($this->isChildEvent()) {
       return $this->getParentEvent()->newRecurrenceSet();
     }
 
     $set = new PhutilCalendarRecurrenceSet();
 
     if ($this->viewerTimezone) {
       $set->setViewerTimezone($this->viewerTimezone);
     }
 
     $rrule = $this->newRecurrenceRule();
     if (!$rrule) {
       return null;
     }
 
     $set->addSource($rrule);
 
     return $set;
   }
 
   public function isImportedEvent() {
     return (bool)$this->getImportSourcePHID();
   }
 
   public function getImportSource() {
     return $this->assertAttached($this->importSource);
   }
 
   public function attachImportSource(
     PhabricatorCalendarImport $import = null) {
     $this->importSource = $import;
     return $this;
   }
 
   public function loadForkTarget(PhabricatorUser $viewer) {
     if (!$this->getIsRecurring()) {
       // Can't fork an event which isn't recurring.
       return null;
     }
 
     if ($this->isChildEvent()) {
       // If this is a child event, this is the fork target.
       return $this;
     }
 
     if (!$this->isValidSequenceIndex($viewer, 1)) {
       // This appears to be a "recurring" event with no valid instances: for
       // example, its "until" date is before the second instance would occur.
       // This can happen if we already forked the event or if users entered
       // silly stuff. Just edit the event directly without forking anything.
       return null;
     }
 
 
     $next_event = id(new PhabricatorCalendarEventQuery())
       ->setViewer($viewer)
       ->withInstanceSequencePairs(
         array(
           array($this->getPHID(), 1),
         ))
       ->requireCapabilities(
         array(
           PhabricatorPolicyCapability::CAN_VIEW,
           PhabricatorPolicyCapability::CAN_EDIT,
         ))
       ->executeOne();
 
     if (!$next_event) {
       $next_event = $this->newStub($viewer, 1);
     }
 
     return $next_event;
   }
 
   public function loadFutureEvents(PhabricatorUser $viewer) {
     // NOTE: If you can't edit some of the future events, we just
     // don't try to update them. This seems like it's probably what
     // users are likely to expect.
 
     // NOTE: This only affects events that are currently in the same
     // series, not all events that were ever in the original series.
     // We could use series PHIDs instead of parent PHIDs to affect more
     // events if this turns out to be counterintuitive. Other
     // applications differ in their behavior.
 
     return id(new PhabricatorCalendarEventQuery())
       ->setViewer($viewer)
       ->withParentEventPHIDs(array($this->getPHID()))
       ->withUTCInitialEpochBetween($this->getUTCInitialEpoch(), null)
       ->requireCapabilities(
         array(
           PhabricatorPolicyCapability::CAN_VIEW,
           PhabricatorPolicyCapability::CAN_EDIT,
         ))
       ->execute();
   }
 
   public function getNotificationPHIDs() {
     $phids = array();
     if ($this->getPHID()) {
       $phids[] = $this->getPHID();
     }
 
     if ($this->getSeriesParentPHID()) {
       $phids[] = $this->getSeriesParentPHID();
     }
 
     return $phids;
   }
 
   public function getRSVPs($phid) {
     return $this->assertAttachedKey($this->rsvps, $phid);
   }
 
   public function attachRSVPs(array $rsvps) {
     $this->rsvps = $rsvps;
     return $this;
   }
 
   public function isRSVPInvited($phid) {
     $status_invited = PhabricatorCalendarEventInvitee::STATUS_INVITED;
     return ($this->getRSVPStatus($phid) == $status_invited);
   }
 
   public function hasRSVPAuthority($phid, $other_phid) {
     foreach ($this->getRSVPs($phid) as $rsvp) {
       if ($rsvp->getInviteePHID() == $other_phid) {
         return true;
       }
     }
 
     return false;
   }
 
   public function getRSVPStatus($phid) {
     // Check for an individual invitee record first.
     $invitees = $this->invitees;
     $invitees = mpull($invitees, null, 'getInviteePHID');
     $invitee = idx($invitees, $phid);
     if ($invitee) {
       return $invitee->getStatus();
     }
 
     // If we don't have one, try to find an invited status for the user's
     // projects.
     $status_invited = PhabricatorCalendarEventInvitee::STATUS_INVITED;
     foreach ($this->getRSVPs($phid) as $rsvp) {
       if ($rsvp->getStatus() == $status_invited) {
         return $status_invited;
       }
     }
 
     return PhabricatorCalendarEventInvitee::STATUS_UNINVITED;
   }
 
 
 
 /* -(  Markup Interface  )--------------------------------------------------- */
 
 
   /**
    * @task markup
    */
   public function getMarkupFieldKey($field) {
-    $hash = PhabricatorHash::digest($this->getMarkupText($field));
-    $id = $this->getID();
-    return "calendar:T{$id}:{$field}:{$hash}";
+    $content = $this->getMarkupText($field);
+    return PhabricatorMarkupEngine::digestRemarkupContent($this, $content);
   }
 
 
   /**
    * @task markup
    */
   public function getMarkupText($field) {
     return $this->getDescription();
   }
 
 
   /**
    * @task markup
    */
   public function newMarkupEngine($field) {
     return PhabricatorMarkupEngine::newCalendarMarkupEngine();
   }
 
 
   /**
    * @task markup
    */
   public function didMarkupText(
     $field,
     $output,
     PhutilMarkupEngine $engine) {
     return $output;
   }
 
 
   /**
    * @task markup
    */
   public function shouldUseMarkupCache($field) {
     return (bool)$this->getID();
   }
 
 /* -(  PhabricatorPolicyInterface  )----------------------------------------- */
 
 
   public function getCapabilities() {
     return array(
       PhabricatorPolicyCapability::CAN_VIEW,
       PhabricatorPolicyCapability::CAN_EDIT,
     );
   }
 
   public function getPolicy($capability) {
     switch ($capability) {
       case PhabricatorPolicyCapability::CAN_VIEW:
         return $this->getViewPolicy();
       case PhabricatorPolicyCapability::CAN_EDIT:
         if ($this->isImportedEvent()) {
           return PhabricatorPolicies::POLICY_NOONE;
         } else {
           return $this->getEditPolicy();
         }
     }
   }
 
   public function hasAutomaticCapability($capability, PhabricatorUser $viewer) {
     if ($this->isImportedEvent()) {
       return false;
     }
 
     // The host of an event can always view and edit it.
     $user_phid = $this->getHostPHID();
     if ($user_phid) {
       $viewer_phid = $viewer->getPHID();
       if ($viewer_phid == $user_phid) {
         return true;
       }
     }
 
     if ($capability == PhabricatorPolicyCapability::CAN_VIEW) {
       $status = $this->getUserInviteStatus($viewer->getPHID());
       if ($status == PhabricatorCalendarEventInvitee::STATUS_INVITED ||
         $status == PhabricatorCalendarEventInvitee::STATUS_ATTENDING ||
         $status == PhabricatorCalendarEventInvitee::STATUS_DECLINED) {
         return true;
       }
     }
 
     return false;
   }
 
 
 /* -(  PhabricatorExtendedPolicyInterface  )--------------------------------- */
 
 
   public function getExtendedPolicy($capability, PhabricatorUser $viewer) {
     $extended = array();
 
     switch ($capability) {
       case PhabricatorPolicyCapability::CAN_VIEW:
         $import_source = $this->getImportSource();
         if ($import_source) {
           $extended[] = array(
             $import_source,
             PhabricatorPolicyCapability::CAN_VIEW,
           );
         }
         break;
     }
 
     return $extended;
   }
 
 /* -(  PhabricatorPolicyCodexInterface  )------------------------------------ */
 
   public function newPolicyCodex() {
     return new PhabricatorCalendarEventPolicyCodex();
   }
 
 
 /* -(  PhabricatorApplicationTransactionInterface  )------------------------- */
 
 
   public function getApplicationTransactionEditor() {
     return new PhabricatorCalendarEventEditor();
   }
 
   public function getApplicationTransactionObject() {
     return $this;
   }
 
   public function getApplicationTransactionTemplate() {
     return new PhabricatorCalendarEventTransaction();
   }
 
   public function willRenderTimeline(
     PhabricatorApplicationTransactionView $timeline,
     AphrontRequest $request) {
 
     return $timeline;
   }
 
 /* -(  PhabricatorSubscribableInterface  )----------------------------------- */
 
 
   public function isAutomaticallySubscribed($phid) {
     return ($phid == $this->getHostPHID());
   }
 
 /* -(  PhabricatorTokenReceiverInterface  )---------------------------------- */
 
 
   public function getUsersToNotifyOfTokenGiven() {
     return array($this->getHostPHID());
   }
 
 /* -(  PhabricatorDestructibleInterface  )----------------------------------- */
 
 
   public function destroyObjectPermanently(
     PhabricatorDestructionEngine $engine) {
 
     $this->openTransaction();
       $invitees = id(new PhabricatorCalendarEventInvitee())->loadAllWhere(
         'eventPHID = %s',
         $this->getPHID());
       foreach ($invitees as $invitee) {
         $invitee->delete();
       }
 
       $notifications = id(new PhabricatorCalendarNotification())->loadAllWhere(
         'eventPHID = %s',
         $this->getPHID());
       foreach ($notifications as $notification) {
         $notification->delete();
       }
 
       $this->delete();
     $this->saveTransaction();
   }
 
 /* -(  PhabricatorSpacesInterface  )----------------------------------------- */
 
 
   public function getSpacePHID() {
     return $this->spacePHID;
   }
 
 
 /* -(  PhabricatorFulltextInterface  )--------------------------------------- */
 
 
   public function newFulltextEngine() {
     return new PhabricatorCalendarEventFulltextEngine();
   }
 
 
 /* -(  PhabricatorConduitResultInterface  )---------------------------------- */
 
 
   public function getFieldSpecificationsForConduit() {
     return array(
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('name')
         ->setType('string')
         ->setDescription(pht('The name of the event.')),
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('description')
         ->setType('string')
         ->setDescription(pht('The event description.')),
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('isAllDay')
         ->setType('bool')
         ->setDescription(pht('True if the event is an all day event.')),
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('startDateTime')
         ->setType('datetime')
         ->setDescription(pht('Start date and time of the event.')),
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('endDateTime')
         ->setType('datetime')
         ->setDescription(pht('End date and time of the event.')),
     );
   }
 
   public function getFieldValuesForConduit() {
     $start_datetime = $this->newStartDateTime();
     $end_datetime = $this->newEndDateTime();
 
     return array(
       'name' => $this->getName(),
       'description' => $this->getDescription(),
       'isAllDay' => (bool)$this->getIsAllDay(),
       'startDateTime' => $this->getConduitDateTime($start_datetime),
       'endDateTime' => $this->getConduitDateTime($end_datetime),
     );
   }
 
   public function getConduitSearchAttachments() {
     return array();
   }
 
   private function getConduitDateTime($datetime) {
     if (!$datetime) {
       return null;
     }
 
     $epoch = $datetime->getEpoch();
 
     // TODO: Possibly pass the actual viewer in from the Conduit stuff, or
     // retain it when setting the viewer timezone?
     $viewer = id(new PhabricatorUser())
       ->overrideTimezoneIdentifier($this->viewerTimezone);
 
     return array(
       'epoch' => (int)$epoch,
       'display' => array(
         'default' => phabricator_datetime($epoch, $viewer),
       ),
       'iso8601' => $datetime->getISO8601(),
       'timezone' => $this->viewerTimezone,
     );
   }
 
 }
diff --git a/src/applications/differential/storage/DifferentialInlineComment.php b/src/applications/differential/storage/DifferentialInlineComment.php
index c27d59bbe3..bdc231671f 100644
--- a/src/applications/differential/storage/DifferentialInlineComment.php
+++ b/src/applications/differential/storage/DifferentialInlineComment.php
@@ -1,284 +1,284 @@
 <?php
 
 final class DifferentialInlineComment
   extends Phobject
   implements PhabricatorInlineCommentInterface {
 
   private $proxy;
   private $syntheticAuthor;
   private $isGhost;
 
   public function __construct() {
     $this->proxy = new DifferentialTransactionComment();
   }
 
   public function __clone() {
     $this->proxy = clone $this->proxy;
   }
 
   public function getTransactionCommentForSave() {
     $content_source = PhabricatorContentSource::newForSource(
       PhabricatorOldWorldContentSource::SOURCECONST);
 
     $this->proxy
       ->setViewPolicy('public')
       ->setEditPolicy($this->getAuthorPHID())
       ->setContentSource($content_source)
       ->attachIsHidden(false)
       ->setCommentVersion(1);
 
     return $this->proxy;
   }
 
   public function openTransaction() {
     $this->proxy->openTransaction();
   }
 
   public function saveTransaction() {
     $this->proxy->saveTransaction();
   }
 
   public function save() {
     $this->getTransactionCommentForSave()->save();
 
     return $this;
   }
 
   public function delete() {
     $this->proxy->delete();
 
     return $this;
   }
 
   public function supportsHiding() {
     if ($this->getSyntheticAuthor()) {
       return false;
     }
     return true;
   }
 
   public function isHidden() {
     if (!$this->supportsHiding()) {
       return false;
     }
     return $this->proxy->getIsHidden();
   }
 
   public function getID() {
     return $this->proxy->getID();
   }
 
   public function getPHID() {
     return $this->proxy->getPHID();
   }
 
   public static function newFromModernComment(
     DifferentialTransactionComment $comment) {
 
     $obj = new DifferentialInlineComment();
     $obj->proxy = $comment;
 
     return $obj;
   }
 
   public function setSyntheticAuthor($synthetic_author) {
     $this->syntheticAuthor = $synthetic_author;
     return $this;
   }
 
   public function getSyntheticAuthor() {
     return $this->syntheticAuthor;
   }
 
   public function isCompatible(PhabricatorInlineCommentInterface $comment) {
     return
       ($this->getAuthorPHID() === $comment->getAuthorPHID()) &&
       ($this->getSyntheticAuthor() === $comment->getSyntheticAuthor()) &&
       ($this->getContent() === $comment->getContent());
   }
 
   public function setContent($content) {
     $this->proxy->setContent($content);
     return $this;
   }
 
   public function getContent() {
     return $this->proxy->getContent();
   }
 
   public function isDraft() {
     return !$this->proxy->getTransactionPHID();
   }
 
   public function setChangesetID($id) {
     $this->proxy->setChangesetID($id);
     return $this;
   }
 
   public function getChangesetID() {
     return $this->proxy->getChangesetID();
   }
 
   public function setIsNewFile($is_new) {
     $this->proxy->setIsNewFile($is_new);
     return $this;
   }
 
   public function getIsNewFile() {
     return $this->proxy->getIsNewFile();
   }
 
   public function setLineNumber($number) {
     $this->proxy->setLineNumber($number);
     return $this;
   }
 
   public function getLineNumber() {
     return $this->proxy->getLineNumber();
   }
 
   public function setLineLength($length) {
     $this->proxy->setLineLength($length);
     return $this;
   }
 
   public function getLineLength() {
     return $this->proxy->getLineLength();
   }
 
   public function setCache($cache) {
     return $this;
   }
 
   public function getCache() {
     return null;
   }
 
   public function setAuthorPHID($phid) {
     $this->proxy->setAuthorPHID($phid);
     return $this;
   }
 
   public function getAuthorPHID() {
     return $this->proxy->getAuthorPHID();
   }
 
   public function setRevision(DifferentialRevision $revision) {
     $this->proxy->setRevisionPHID($revision->getPHID());
     return $this;
   }
 
   public function getRevisionPHID() {
     return $this->proxy->getRevisionPHID();
   }
 
   // Although these are purely transitional, they're also *extra* dumb.
 
   public function setRevisionID($revision_id) {
     $revision = id(new DifferentialRevision())->load($revision_id);
     return $this->setRevision($revision);
   }
 
   public function getRevisionID() {
     $phid = $this->proxy->getRevisionPHID();
     if (!$phid) {
       return null;
     }
 
     $revision = id(new DifferentialRevision())->loadOneWhere(
       'phid = %s',
       $phid);
     if (!$revision) {
       return null;
     }
     return $revision->getID();
   }
 
   // When setting a comment ID, we also generate a phantom transaction PHID for
   // the future transaction.
 
   public function setCommentID($id) {
     $this->proxy->setTransactionPHID(
       PhabricatorPHID::generateNewPHID(
         PhabricatorApplicationTransactionTransactionPHIDType::TYPECONST,
         DifferentialRevisionPHIDType::TYPECONST));
     return $this;
   }
 
   public function setReplyToCommentPHID($phid) {
     $this->proxy->setReplyToCommentPHID($phid);
     return $this;
   }
 
   public function getReplyToCommentPHID() {
     return $this->proxy->getReplyToCommentPHID();
   }
 
   public function setHasReplies($has_replies) {
     $this->proxy->setHasReplies($has_replies);
     return $this;
   }
 
   public function getHasReplies() {
     return $this->proxy->getHasReplies();
   }
 
   public function setIsDeleted($is_deleted) {
     $this->proxy->setIsDeleted($is_deleted);
     return $this;
   }
 
   public function getIsDeleted() {
     return $this->proxy->getIsDeleted();
   }
 
   public function setFixedState($state) {
     $this->proxy->setFixedState($state);
     return $this;
   }
 
   public function getFixedState() {
     return $this->proxy->getFixedState();
   }
 
   public function setIsGhost($is_ghost) {
     $this->isGhost = $is_ghost;
     return $this;
   }
 
   public function getIsGhost() {
     return $this->isGhost;
   }
 
   public function makeEphemeral() {
     $this->proxy->makeEphemeral();
     return $this;
   }
 
 
 /* -(  PhabricatorMarkupInterface Implementation  )-------------------------- */
 
 
   public function getMarkupFieldKey($field) {
-    // We can't use ID because synthetic comments don't have it.
-    return 'DI:'.PhabricatorHash::digest($this->getContent());
+    $content = $this->getMarkupText($field);
+    return PhabricatorMarkupEngine::digestRemarkupContent($this, $content);
   }
 
   public function newMarkupEngine($field) {
     return PhabricatorMarkupEngine::newDifferentialMarkupEngine();
   }
 
   public function getMarkupText($field) {
     return $this->getContent();
   }
 
   public function didMarkupText($field, $output, PhutilMarkupEngine $engine) {
     return $output;
   }
 
   public function shouldUseMarkupCache($field) {
     // Only cache submitted comments.
     return ($this->getID() && !$this->isDraft());
   }
 
 }
diff --git a/src/applications/legalpad/storage/LegalpadDocumentBody.php b/src/applications/legalpad/storage/LegalpadDocumentBody.php
index a3fdf20f5f..001e38ebf3 100644
--- a/src/applications/legalpad/storage/LegalpadDocumentBody.php
+++ b/src/applications/legalpad/storage/LegalpadDocumentBody.php
@@ -1,77 +1,77 @@
 <?php
 
 final class LegalpadDocumentBody extends LegalpadDAO
   implements
     PhabricatorMarkupInterface {
 
   const MARKUP_FIELD_TEXT = 'markup:text ';
 
   protected $phid;
   protected $creatorPHID;
   protected $documentPHID;
   protected $version;
   protected $title;
   protected $text;
 
   protected function getConfiguration() {
     return array(
       self::CONFIG_AUX_PHID => true,
       self::CONFIG_COLUMN_SCHEMA => array(
         'version' => 'uint32',
         'title' => 'text255',
         'text' => 'text?',
       ),
       self::CONFIG_KEY_SCHEMA => array(
         'key_document' => array(
           'columns' => array('documentPHID', 'version'),
           'unique' => true,
         ),
       ),
     ) + parent::getConfiguration();
   }
 
   public function generatePHID() {
     return PhabricatorPHID::generateNewPHID(
       PhabricatorPHIDConstants::PHID_TYPE_LEGB);
   }
 
 /* -(  PhabricatorMarkupInterface  )----------------------------------------- */
 
 
   public function getMarkupFieldKey($field) {
-    $hash = PhabricatorHash::digest($this->getMarkupText($field));
-    return 'LEGB:'.$hash;
+    $content = $this->getMarkupText($field);
+    return PhabricatorMarkupEngine::digestRemarkupContent($this, $content);
   }
 
   public function newMarkupEngine($field) {
     return PhabricatorMarkupEngine::newMarkupEngine(array());
   }
 
   public function getMarkupText($field) {
     switch ($field) {
       case self::MARKUP_FIELD_TEXT:
         $text = $this->getText();
         break;
       default:
         throw new Exception(pht('Unknown field: %s', $field));
         break;
     }
 
     return $text;
   }
 
   public function didMarkupText($field, $output, PhutilMarkupEngine $engine) {
     require_celerity_resource('phabricator-remarkup-css');
     return phutil_tag(
       'div',
       array(
         'class' => 'phabricator-remarkup',
       ),
       $output);
   }
 
   public function shouldUseMarkupCache($field) {
     return (bool)$this->getID();
   }
 
 }
diff --git a/src/applications/maniphest/storage/ManiphestTask.php b/src/applications/maniphest/storage/ManiphestTask.php
index ebcdef691d..16937da2f2 100644
--- a/src/applications/maniphest/storage/ManiphestTask.php
+++ b/src/applications/maniphest/storage/ManiphestTask.php
@@ -1,591 +1,590 @@
 <?php
 
 final class ManiphestTask extends ManiphestDAO
   implements
     PhabricatorSubscribableInterface,
     PhabricatorMarkupInterface,
     PhabricatorPolicyInterface,
     PhabricatorTokenReceiverInterface,
     PhabricatorFlaggableInterface,
     PhabricatorMentionableInterface,
     PhrequentTrackableInterface,
     PhabricatorCustomFieldInterface,
     PhabricatorDestructibleInterface,
     PhabricatorApplicationTransactionInterface,
     PhabricatorProjectInterface,
     PhabricatorSpacesInterface,
     PhabricatorConduitResultInterface,
     PhabricatorFulltextInterface,
     DoorkeeperBridgedObjectInterface,
     PhabricatorEditEngineSubtypeInterface,
     PhabricatorEditEngineLockableInterface {
 
   const MARKUP_FIELD_DESCRIPTION = 'markup:desc';
 
   protected $authorPHID;
   protected $ownerPHID;
 
   protected $status;
   protected $priority;
   protected $subpriority = 0;
 
   protected $title = '';
   protected $originalTitle = '';
   protected $description = '';
   protected $originalEmailSource;
   protected $mailKey;
   protected $viewPolicy = PhabricatorPolicies::POLICY_USER;
   protected $editPolicy = PhabricatorPolicies::POLICY_USER;
 
   protected $ownerOrdering;
   protected $spacePHID;
   protected $bridgedObjectPHID;
   protected $properties = array();
   protected $points;
   protected $subtype;
 
   private $subscriberPHIDs = self::ATTACHABLE;
   private $groupByProjectPHID = self::ATTACHABLE;
   private $customFields = self::ATTACHABLE;
   private $edgeProjectPHIDs = self::ATTACHABLE;
   private $bridgedObject = self::ATTACHABLE;
 
   public static function initializeNewTask(PhabricatorUser $actor) {
     $app = id(new PhabricatorApplicationQuery())
       ->setViewer($actor)
       ->withClasses(array('PhabricatorManiphestApplication'))
       ->executeOne();
 
     $view_policy = $app->getPolicy(ManiphestDefaultViewCapability::CAPABILITY);
     $edit_policy = $app->getPolicy(ManiphestDefaultEditCapability::CAPABILITY);
 
     return id(new ManiphestTask())
       ->setStatus(ManiphestTaskStatus::getDefaultStatus())
       ->setPriority(ManiphestTaskPriority::getDefaultPriority())
       ->setAuthorPHID($actor->getPHID())
       ->setViewPolicy($view_policy)
       ->setEditPolicy($edit_policy)
       ->setSpacePHID($actor->getDefaultSpacePHID())
       ->setSubtype(PhabricatorEditEngineSubtype::SUBTYPE_DEFAULT)
       ->attachProjectPHIDs(array())
       ->attachSubscriberPHIDs(array());
   }
 
   protected function getConfiguration() {
     return array(
       self::CONFIG_AUX_PHID => true,
       self::CONFIG_SERIALIZATION => array(
         'properties' => self::SERIALIZATION_JSON,
       ),
       self::CONFIG_COLUMN_SCHEMA => array(
         'ownerPHID' => 'phid?',
         'status' => 'text12',
         'priority' => 'uint32',
         'title' => 'sort',
         'originalTitle' => 'text',
         'description' => 'text',
         'mailKey' => 'bytes20',
         'ownerOrdering' => 'text64?',
         'originalEmailSource' => 'text255?',
         'subpriority' => 'double',
         'points' => 'double?',
         'bridgedObjectPHID' => 'phid?',
         'subtype' => 'text64',
       ),
       self::CONFIG_KEY_SCHEMA => array(
         'key_phid' => null,
         'phid' => array(
           'columns' => array('phid'),
           'unique' => true,
         ),
         'priority' => array(
           'columns' => array('priority', 'status'),
         ),
         'status' => array(
           'columns' => array('status'),
         ),
         'ownerPHID' => array(
           'columns' => array('ownerPHID', 'status'),
         ),
         'authorPHID' => array(
           'columns' => array('authorPHID', 'status'),
         ),
         'ownerOrdering' => array(
           'columns' => array('ownerOrdering'),
         ),
         'priority_2' => array(
           'columns' => array('priority', 'subpriority'),
         ),
         'key_dateCreated' => array(
           'columns' => array('dateCreated'),
         ),
         'key_dateModified' => array(
           'columns' => array('dateModified'),
         ),
         'key_title' => array(
           'columns' => array('title(64)'),
         ),
         'key_bridgedobject' => array(
           'columns' => array('bridgedObjectPHID'),
           'unique' => true,
         ),
         'key_subtype' => array(
           'columns' => array('subtype'),
         ),
       ),
     ) + parent::getConfiguration();
   }
 
   public function loadDependsOnTaskPHIDs() {
     return PhabricatorEdgeQuery::loadDestinationPHIDs(
       $this->getPHID(),
       ManiphestTaskDependsOnTaskEdgeType::EDGECONST);
   }
 
   public function loadDependedOnByTaskPHIDs() {
     return PhabricatorEdgeQuery::loadDestinationPHIDs(
       $this->getPHID(),
       ManiphestTaskDependedOnByTaskEdgeType::EDGECONST);
   }
 
   public function generatePHID() {
     return PhabricatorPHID::generateNewPHID(ManiphestTaskPHIDType::TYPECONST);
   }
 
   public function getSubscriberPHIDs() {
     return $this->assertAttached($this->subscriberPHIDs);
   }
 
   public function getProjectPHIDs() {
     return $this->assertAttached($this->edgeProjectPHIDs);
   }
 
   public function attachProjectPHIDs(array $phids) {
     $this->edgeProjectPHIDs = $phids;
     return $this;
   }
 
   public function attachSubscriberPHIDs(array $phids) {
     $this->subscriberPHIDs = $phids;
     return $this;
   }
 
   public function setOwnerPHID($phid) {
     $this->ownerPHID = nonempty($phid, null);
     return $this;
   }
 
   public function setTitle($title) {
     $this->title = $title;
     if (!$this->getID()) {
       $this->originalTitle = $title;
     }
     return $this;
   }
 
   public function getMonogram() {
     return 'T'.$this->getID();
   }
 
   public function getURI() {
     return '/'.$this->getMonogram();
   }
 
   public function attachGroupByProjectPHID($phid) {
     $this->groupByProjectPHID = $phid;
     return $this;
   }
 
   public function getGroupByProjectPHID() {
     return $this->assertAttached($this->groupByProjectPHID);
   }
 
   public function save() {
     if (!$this->mailKey) {
       $this->mailKey = Filesystem::readRandomCharacters(20);
     }
 
     $result = parent::save();
 
     return $result;
   }
 
   public function isClosed() {
     return ManiphestTaskStatus::isClosedStatus($this->getStatus());
   }
 
   public function isLocked() {
     return ManiphestTaskStatus::isLockedStatus($this->getStatus());
   }
 
   public function setProperty($key, $value) {
     $this->properties[$key] = $value;
     return $this;
   }
 
   public function getProperty($key, $default = null) {
     return idx($this->properties, $key, $default);
   }
 
   public function getCoverImageFilePHID() {
     return idx($this->properties, 'cover.filePHID');
   }
 
   public function getCoverImageThumbnailPHID() {
     return idx($this->properties, 'cover.thumbnailPHID');
   }
 
   public function getWorkboardOrderVectors() {
     return array(
       PhabricatorProjectColumn::ORDER_PRIORITY => array(
         (int)-$this->getPriority(),
         (double)-$this->getSubpriority(),
         (int)-$this->getID(),
       ),
     );
   }
 
   private function comparePriorityTo(ManiphestTask $other) {
     $upri = $this->getPriority();
     $vpri = $other->getPriority();
 
     if ($upri != $vpri) {
       return ($upri - $vpri);
     }
 
     $usub = $this->getSubpriority();
     $vsub = $other->getSubpriority();
 
     if ($usub != $vsub) {
       return ($usub - $vsub);
     }
 
     $uid = $this->getID();
     $vid = $other->getID();
 
     if ($uid != $vid) {
       return ($uid - $vid);
     }
 
     return 0;
   }
 
   public function isLowerPriorityThan(ManiphestTask $other) {
     return ($this->comparePriorityTo($other) < 0);
   }
 
   public function isHigherPriorityThan(ManiphestTask $other) {
     return ($this->comparePriorityTo($other) > 0);
   }
 
   public function getWorkboardProperties() {
     return array(
       'status' => $this->getStatus(),
       'points' => (double)$this->getPoints(),
     );
   }
 
 
 /* -(  PhabricatorSubscribableInterface  )----------------------------------- */
 
 
   public function isAutomaticallySubscribed($phid) {
     return ($phid == $this->getOwnerPHID());
   }
 
 
 /* -(  Markup Interface  )--------------------------------------------------- */
 
 
   /**
    * @task markup
    */
   public function getMarkupFieldKey($field) {
-    $hash = PhabricatorHash::digest($this->getMarkupText($field));
-    $id = $this->getID();
-    return "maniphest:T{$id}:{$field}:{$hash}";
+    $content = $this->getMarkupText($field);
+    return PhabricatorMarkupEngine::digestRemarkupContent($this, $content);
   }
 
 
   /**
    * @task markup
    */
   public function getMarkupText($field) {
     return $this->getDescription();
   }
 
 
   /**
    * @task markup
    */
   public function newMarkupEngine($field) {
     return PhabricatorMarkupEngine::newManiphestMarkupEngine();
   }
 
 
   /**
    * @task markup
    */
   public function didMarkupText(
     $field,
     $output,
     PhutilMarkupEngine $engine) {
     return $output;
   }
 
 
   /**
    * @task markup
    */
   public function shouldUseMarkupCache($field) {
     return (bool)$this->getID();
   }
 
 
 /* -(  Policy Interface  )--------------------------------------------------- */
 
 
   public function getCapabilities() {
     return array(
       PhabricatorPolicyCapability::CAN_VIEW,
       PhabricatorPolicyCapability::CAN_INTERACT,
       PhabricatorPolicyCapability::CAN_EDIT,
     );
   }
 
   public function getPolicy($capability) {
     switch ($capability) {
       case PhabricatorPolicyCapability::CAN_VIEW:
         return $this->getViewPolicy();
       case PhabricatorPolicyCapability::CAN_INTERACT:
         if ($this->isLocked()) {
           return PhabricatorPolicies::POLICY_NOONE;
         } else {
           return $this->getViewPolicy();
         }
       case PhabricatorPolicyCapability::CAN_EDIT:
         return $this->getEditPolicy();
     }
   }
 
   public function hasAutomaticCapability($capability, PhabricatorUser $user) {
     // The owner of a task can always view and edit it.
     $owner_phid = $this->getOwnerPHID();
     if ($owner_phid) {
       $user_phid = $user->getPHID();
       if ($user_phid == $owner_phid) {
         return true;
       }
     }
 
     return false;
   }
 
   public function describeAutomaticCapability($capability) {
     return pht('The owner of a task can always view and edit it.');
   }
 
 
 /* -(  PhabricatorTokenReceiverInterface  )---------------------------------- */
 
 
   public function getUsersToNotifyOfTokenGiven() {
     // Sort of ambiguous who this was intended for; just let them both know.
     return array_filter(
       array_unique(
         array(
           $this->getAuthorPHID(),
           $this->getOwnerPHID(),
         )));
   }
 
 
 /* -(  PhabricatorCustomFieldInterface  )------------------------------------ */
 
 
   public function getCustomFieldSpecificationForRole($role) {
     return PhabricatorEnv::getEnvConfig('maniphest.fields');
   }
 
   public function getCustomFieldBaseClass() {
     return 'ManiphestCustomField';
   }
 
   public function getCustomFields() {
     return $this->assertAttached($this->customFields);
   }
 
   public function attachCustomFields(PhabricatorCustomFieldAttachment $fields) {
     $this->customFields = $fields;
     return $this;
   }
 
 
 /* -(  PhabricatorDestructibleInterface  )----------------------------------- */
 
 
   public function destroyObjectPermanently(
     PhabricatorDestructionEngine $engine) {
 
     $this->openTransaction();
     $this->delete();
     $this->saveTransaction();
   }
 
 
 /* -(  PhabricatorApplicationTransactionInterface  )------------------------- */
 
 
   public function getApplicationTransactionEditor() {
     return new ManiphestTransactionEditor();
   }
 
   public function getApplicationTransactionObject() {
     return $this;
   }
 
   public function getApplicationTransactionTemplate() {
     return new ManiphestTransaction();
   }
 
   public function willRenderTimeline(
     PhabricatorApplicationTransactionView $timeline,
     AphrontRequest $request) {
 
     return $timeline;
   }
 
 
 /* -(  PhabricatorSpacesInterface  )----------------------------------------- */
 
 
   public function getSpacePHID() {
     return $this->spacePHID;
   }
 
 
 /* -(  PhabricatorConduitResultInterface  )---------------------------------- */
 
 
   public function getFieldSpecificationsForConduit() {
     return array(
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('title')
         ->setType('string')
         ->setDescription(pht('The title of the task.')),
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('description')
         ->setType('remarkup')
         ->setDescription(pht('The task description.')),
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('authorPHID')
         ->setType('phid')
         ->setDescription(pht('Original task author.')),
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('ownerPHID')
         ->setType('phid?')
         ->setDescription(pht('Current task owner, if task is assigned.')),
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('status')
         ->setType('map<string, wild>')
         ->setDescription(pht('Information about task status.')),
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('priority')
         ->setType('map<string, wild>')
         ->setDescription(pht('Information about task priority.')),
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('points')
         ->setType('points')
         ->setDescription(pht('Point value of the task.')),
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('subtype')
         ->setType('string')
         ->setDescription(pht('Subtype of the task.')),
     );
   }
 
   public function getFieldValuesForConduit() {
     $status_value = $this->getStatus();
     $status_info = array(
       'value' => $status_value,
       'name' => ManiphestTaskStatus::getTaskStatusName($status_value),
       'color' => ManiphestTaskStatus::getStatusColor($status_value),
     );
 
     $priority_value = (int)$this->getPriority();
     $priority_info = array(
       'value' => $priority_value,
       'subpriority' => (double)$this->getSubpriority(),
       'name' => ManiphestTaskPriority::getTaskPriorityName($priority_value),
       'color' => ManiphestTaskPriority::getTaskPriorityColor($priority_value),
     );
 
     return array(
       'name' => $this->getTitle(),
       'description' => array(
         'raw' => $this->getDescription(),
       ),
       'authorPHID' => $this->getAuthorPHID(),
       'ownerPHID' => $this->getOwnerPHID(),
       'status' => $status_info,
       'priority' => $priority_info,
       'points' => $this->getPoints(),
       'subtype' => $this->getSubtype(),
     );
   }
 
   public function getConduitSearchAttachments() {
     return array(
       id(new PhabricatorBoardColumnsSearchEngineAttachment())
         ->setAttachmentKey('columns'),
     );
   }
 
 
 /* -(  PhabricatorFulltextInterface  )--------------------------------------- */
 
 
   public function newFulltextEngine() {
     return new ManiphestTaskFulltextEngine();
   }
 
 
 /* -(  DoorkeeperBridgedObjectInterface  )----------------------------------- */
 
 
   public function getBridgedObject() {
     return $this->assertAttached($this->bridgedObject);
   }
 
   public function attachBridgedObject(
     DoorkeeperExternalObject $object = null) {
     $this->bridgedObject = $object;
     return $this;
   }
 
 
 /* -(  PhabricatorEditEngineSubtypeInterface  )------------------------------ */
 
 
   public function getEditEngineSubtype() {
     return $this->getSubtype();
   }
 
   public function setEditEngineSubtype($value) {
     return $this->setSubtype($value);
   }
 
   public function newEditEngineSubtypeMap() {
     $config = PhabricatorEnv::getEnvConfig('maniphest.subtypes');
     return PhabricatorEditEngineSubtype::newSubtypeMap($config);
   }
 
 
 /* -(  PhabricatorEditEngineLockableInterface  )----------------------------- */
 
 
   public function newEditEngineLock() {
     return new ManiphestTaskEditEngineLock();
   }
 
 }
diff --git a/src/applications/phame/storage/PhameBlog.php b/src/applications/phame/storage/PhameBlog.php
index 32cb6db543..bd4954d0ab 100644
--- a/src/applications/phame/storage/PhameBlog.php
+++ b/src/applications/phame/storage/PhameBlog.php
@@ -1,407 +1,407 @@
 <?php
 
 final class PhameBlog extends PhameDAO
   implements
     PhabricatorPolicyInterface,
     PhabricatorMarkupInterface,
     PhabricatorSubscribableInterface,
     PhabricatorFlaggableInterface,
     PhabricatorProjectInterface,
     PhabricatorDestructibleInterface,
     PhabricatorApplicationTransactionInterface,
     PhabricatorConduitResultInterface,
     PhabricatorFulltextInterface {
 
   const MARKUP_FIELD_DESCRIPTION = 'markup:description';
 
   protected $name;
   protected $subtitle;
   protected $description;
   protected $domain;
   protected $domainFullURI;
   protected $parentSite;
   protected $parentDomain;
   protected $configData;
   protected $creatorPHID;
   protected $viewPolicy;
   protected $editPolicy;
   protected $status;
   protected $mailKey;
   protected $profileImagePHID;
   protected $headerImagePHID;
 
   private $profileImageFile = self::ATTACHABLE;
   private $headerImageFile = self::ATTACHABLE;
 
   const STATUS_ACTIVE = 'active';
   const STATUS_ARCHIVED = 'archived';
 
   protected function getConfiguration() {
     return array(
       self::CONFIG_AUX_PHID   => true,
       self::CONFIG_SERIALIZATION => array(
         'configData' => self::SERIALIZATION_JSON,
       ),
       self::CONFIG_COLUMN_SCHEMA => array(
         'name' => 'text64',
         'subtitle' => 'text64',
         'description' => 'text',
         'domain' => 'text128?',
         'domainFullURI' => 'text128?',
         'parentSite' => 'text128?',
         'parentDomain' => 'text128?',
         'status' => 'text32',
         'mailKey' => 'bytes20',
         'profileImagePHID' => 'phid?',
         'headerImagePHID' => 'phid?',
 
         // T6203/NULLABILITY
         // These policies should always be non-null.
         'editPolicy' => 'policy?',
         'viewPolicy' => 'policy?',
       ),
       self::CONFIG_KEY_SCHEMA => array(
         'key_phid' => null,
         'phid' => array(
           'columns' => array('phid'),
           'unique' => true,
         ),
         'domain' => array(
           'columns' => array('domain'),
           'unique' => true,
         ),
       ),
     ) + parent::getConfiguration();
   }
 
   public function save() {
     if (!$this->getMailKey()) {
       $this->setMailKey(Filesystem::readRandomCharacters(20));
     }
     return parent::save();
   }
 
   public function generatePHID() {
     return PhabricatorPHID::generateNewPHID(
       PhabricatorPhameBlogPHIDType::TYPECONST);
   }
 
   public static function initializeNewBlog(PhabricatorUser $actor) {
     $blog = id(new PhameBlog())
       ->setCreatorPHID($actor->getPHID())
       ->setStatus(self::STATUS_ACTIVE)
       ->setViewPolicy(PhabricatorPolicies::getMostOpenPolicy())
       ->setEditPolicy(PhabricatorPolicies::POLICY_USER);
     return $blog;
   }
 
   public function isArchived() {
     return ($this->getStatus() == self::STATUS_ARCHIVED);
   }
 
   public static function getStatusNameMap() {
     return array(
       self::STATUS_ACTIVE => pht('Active'),
       self::STATUS_ARCHIVED => pht('Archived'),
     );
   }
 
   /**
    * Makes sure a given custom blog uri is properly configured in DNS
    * to point at this Phabricator instance. If there is an error in
    * the configuration, return a string describing the error and how
    * to fix it. If there is no error, return an empty string.
    *
    * @return string
    */
   public function validateCustomDomain($domain_full_uri) {
     $example_domain = 'http://blog.example.com/';
     $label = pht('Invalid');
 
     // note this "uri" should be pretty busted given the desired input
     // so just use it to test if there's a protocol specified
     $uri = new PhutilURI($domain_full_uri);
     $domain = $uri->getDomain();
     $protocol = $uri->getProtocol();
     $path = $uri->getPath();
     $supported_protocols = array('http', 'https');
 
     if (!in_array($protocol, $supported_protocols)) {
       return array(
         $label,
         pht(
           'The custom domain should include a valid protocol in the URI '.
           '(for example, "%s"). Valid protocols are "http" or "https".',
           $example_domain),
         );
     }
 
     if (strlen($path) && $path != '/') {
       return array(
         $label,
         pht(
           'The custom domain should not specify a path (hosting a Phame '.
           'blog at a path is currently not supported). Instead, just provide '.
           'the bare domain name (for example, "%s").',
           $example_domain),
         );
     }
 
     if (strpos($domain, '.') === false) {
       return array(
         $label,
         pht(
           'The custom domain should contain at least one dot (.) because '.
           'some browsers fail to set cookies on domains without a dot. '.
           'Instead, use a normal looking domain name like "%s".',
           $example_domain),
         );
     }
 
     if (!PhabricatorEnv::getEnvConfig('policy.allow-public')) {
       $href = PhabricatorEnv::getProductionURI(
         '/config/edit/policy.allow-public/');
       return array(
         pht('Fix Configuration'),
         pht(
           'For custom domains to work, this Phabricator instance must be '.
           'configured to allow the public access policy. Configure this '.
           'setting %s, or ask an administrator to configure this setting. '.
           'The domain can be specified later once this setting has been '.
           'changed.',
           phutil_tag(
             'a',
             array('href' => $href),
             pht('here'))),
       );
     }
 
     return null;
   }
 
   public function getLiveURI() {
     if (strlen($this->getDomain())) {
       return $this->getExternalLiveURI();
     } else {
       return $this->getInternalLiveURI();
     }
   }
 
   public function getExternalLiveURI() {
     $uri = new PhutilURI($this->getDomainFullURI());
     PhabricatorEnv::requireValidRemoteURIForLink($uri);
     return (string)$uri;
   }
 
   public function getExternalParentURI() {
     $uri = $this->getParentDomain();
     PhabricatorEnv::requireValidRemoteURIForLink($uri);
     return (string)$uri;
   }
 
   public function getInternalLiveURI() {
     return '/phame/live/'.$this->getID().'/';
   }
 
   public function getViewURI() {
     return '/phame/blog/view/'.$this->getID().'/';
   }
 
   public function getManageURI() {
     return '/phame/blog/manage/'.$this->getID().'/';
   }
 
   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 getHeaderImageURI() {
     return $this->getHeaderImageFile()->getBestURI();
   }
 
   public function attachHeaderImageFile(PhabricatorFile $file) {
     $this->headerImageFile = $file;
     return $this;
   }
 
   public function getHeaderImageFile() {
     return $this->assertAttached($this->headerImageFile);
   }
 
 
 /* -(  PhabricatorPolicyInterface Implementation  )-------------------------- */
 
 
   public function getCapabilities() {
     return array(
       PhabricatorPolicyCapability::CAN_VIEW,
       PhabricatorPolicyCapability::CAN_EDIT,
     );
   }
 
 
   public function getPolicy($capability) {
     switch ($capability) {
       case PhabricatorPolicyCapability::CAN_VIEW:
         return $this->getViewPolicy();
       case PhabricatorPolicyCapability::CAN_EDIT:
         return $this->getEditPolicy();
     }
   }
 
   public function hasAutomaticCapability($capability, PhabricatorUser $user) {
     $can_edit = PhabricatorPolicyCapability::CAN_EDIT;
 
     switch ($capability) {
       case PhabricatorPolicyCapability::CAN_VIEW:
         // Users who can edit or post to a blog can always view it.
         if (PhabricatorPolicyFilter::hasCapability($user, $this, $can_edit)) {
           return true;
         }
         break;
     }
 
     return false;
   }
 
 
   public function describeAutomaticCapability($capability) {
     switch ($capability) {
       case PhabricatorPolicyCapability::CAN_VIEW:
         return pht(
           'Users who can edit a blog can always view it.');
     }
 
     return null;
   }
 
 
 /* -(  PhabricatorMarkupInterface Implementation  )-------------------------- */
 
 
   public function getMarkupFieldKey($field) {
-    $hash = PhabricatorHash::digest($this->getMarkupText($field));
-    return $this->getPHID().':'.$field.':'.$hash;
+    $content = $this->getMarkupText($field);
+    return PhabricatorMarkupEngine::digestRemarkupContent($this, $content);
   }
 
 
   public function newMarkupEngine($field) {
     return PhabricatorMarkupEngine::newPhameMarkupEngine();
   }
 
 
   public function getMarkupText($field) {
     return $this->getDescription();
   }
 
 
   public function didMarkupText(
     $field,
     $output,
     PhutilMarkupEngine $engine) {
     return $output;
   }
 
   public function shouldUseMarkupCache($field) {
     return (bool)$this->getPHID();
   }
 
 /* -(  PhabricatorDestructibleInterface  )----------------------------------- */
 
   public function destroyObjectPermanently(
     PhabricatorDestructionEngine $engine) {
 
     $this->openTransaction();
 
       $posts = id(new PhamePostQuery())
         ->setViewer($engine->getViewer())
         ->withBlogPHIDs(array($this->getPHID()))
         ->execute();
       foreach ($posts as $post) {
         $engine->destroyObject($post);
       }
       $this->delete();
 
     $this->saveTransaction();
   }
 
 
 /* -(  PhabricatorApplicationTransactionInterface  )------------------------- */
 
 
   public function getApplicationTransactionEditor() {
     return new PhameBlogEditor();
   }
 
   public function getApplicationTransactionObject() {
     return $this;
   }
 
   public function getApplicationTransactionTemplate() {
     return new PhameBlogTransaction();
   }
 
   public function willRenderTimeline(
     PhabricatorApplicationTransactionView $timeline,
     AphrontRequest $request) {
     return $timeline;
   }
 
 
 /* -(  PhabricatorSubscribableInterface Implementation  )-------------------- */
 
 
   public function isAutomaticallySubscribed($phid) {
     return false;
   }
 
 
 /* -(  PhabricatorConduitResultInterface  )---------------------------------- */
 
 
   public function getFieldSpecificationsForConduit() {
     return array(
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('name')
         ->setType('string')
         ->setDescription(pht('The name of the blog.')),
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('description')
         ->setType('string')
         ->setDescription(pht('Blog description.')),
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('status')
         ->setType('string')
         ->setDescription(pht('Archived or active status.')),
     );
   }
 
   public function getFieldValuesForConduit() {
     return array(
       'name' => $this->getName(),
       'description' => $this->getDescription(),
       'status' => $this->getStatus(),
     );
   }
 
   public function getConduitSearchAttachments() {
     return array();
   }
 
 
 /* -(  PhabricatorFulltextInterface  )--------------------------------------- */
 
   public function newFulltextEngine() {
     return new PhameBlogFulltextEngine();
   }
 
 }
diff --git a/src/applications/phame/storage/PhamePost.php b/src/applications/phame/storage/PhamePost.php
index 6e9e005bfa..f87a37e7a4 100644
--- a/src/applications/phame/storage/PhamePost.php
+++ b/src/applications/phame/storage/PhamePost.php
@@ -1,389 +1,389 @@
 <?php
 
 final class PhamePost extends PhameDAO
   implements
     PhabricatorPolicyInterface,
     PhabricatorMarkupInterface,
     PhabricatorFlaggableInterface,
     PhabricatorProjectInterface,
     PhabricatorApplicationTransactionInterface,
     PhabricatorSubscribableInterface,
     PhabricatorDestructibleInterface,
     PhabricatorTokenReceiverInterface,
     PhabricatorConduitResultInterface,
     PhabricatorFulltextInterface {
 
   const MARKUP_FIELD_BODY    = 'markup:body';
   const MARKUP_FIELD_SUMMARY = 'markup:summary';
 
   protected $bloggerPHID;
   protected $title;
   protected $subtitle;
   protected $phameTitle;
   protected $body;
   protected $visibility;
   protected $configData;
   protected $datePublished;
   protected $blogPHID;
   protected $mailKey;
   protected $headerImagePHID;
 
   private $blog = self::ATTACHABLE;
   private $headerImageFile = self::ATTACHABLE;
 
   public static function initializePost(
     PhabricatorUser $blogger,
     PhameBlog $blog) {
 
     $post = id(new PhamePost())
       ->setBloggerPHID($blogger->getPHID())
       ->setBlogPHID($blog->getPHID())
       ->attachBlog($blog)
       ->setDatePublished(PhabricatorTime::getNow())
       ->setVisibility(PhameConstants::VISIBILITY_PUBLISHED);
 
     return $post;
   }
 
   public function attachBlog(PhameBlog $blog) {
     $this->blog = $blog;
     return $this;
   }
 
   public function getBlog() {
     return $this->assertAttached($this->blog);
   }
 
   public function getMonogram() {
     return 'J'.$this->getID();
   }
 
   public function getLiveURI() {
     $blog = $this->getBlog();
     $is_draft = $this->isDraft();
     $is_archived = $this->isArchived();
     if (strlen($blog->getDomain()) && !$is_draft && !$is_archived) {
       return $this->getExternalLiveURI();
     } else {
       return $this->getInternalLiveURI();
     }
   }
 
   public function getExternalLiveURI() {
     $id = $this->getID();
     $slug = $this->getSlug();
     $path = "/post/{$id}/{$slug}/";
 
     $domain = $this->getBlog()->getDomain();
 
     return (string)id(new PhutilURI('http://'.$domain))
       ->setPath($path);
   }
 
   public function getInternalLiveURI() {
     $id = $this->getID();
     $slug = $this->getSlug();
     $blog_id = $this->getBlog()->getID();
     return "/phame/live/{$blog_id}/post/{$id}/{$slug}/";
   }
 
   public function getViewURI() {
     $id = $this->getID();
     $slug = $this->getSlug();
     return "/phame/post/view/{$id}/{$slug}/";
   }
 
   public function getBestURI($is_live, $is_external) {
     if ($is_live) {
       if ($is_external) {
         return $this->getExternalLiveURI();
       } else {
         return $this->getInternalLiveURI();
       }
     } else {
       return $this->getViewURI();
     }
   }
 
   public function getEditURI() {
     return '/phame/post/edit/'.$this->getID().'/';
   }
 
   public function isDraft() {
     return ($this->getVisibility() == PhameConstants::VISIBILITY_DRAFT);
   }
 
   public function isArchived() {
     return ($this->getVisibility() == PhameConstants::VISIBILITY_ARCHIVED);
   }
 
   protected function getConfiguration() {
     return array(
       self::CONFIG_AUX_PHID   => true,
       self::CONFIG_SERIALIZATION => array(
         'configData' => self::SERIALIZATION_JSON,
       ),
       self::CONFIG_COLUMN_SCHEMA => array(
         'title' => 'text255',
         'subtitle' => 'text64',
         'phameTitle' => 'sort64?',
         'visibility' => 'uint32',
         'mailKey' => 'bytes20',
         'headerImagePHID' => 'phid?',
 
         // T6203/NULLABILITY
         // These seem like they should always be non-null?
         'blogPHID' => 'phid?',
         'body' => 'text?',
         'configData' => 'text?',
 
         // T6203/NULLABILITY
         // This one probably should be nullable?
         'datePublished' => 'epoch',
       ),
       self::CONFIG_KEY_SCHEMA => array(
         'key_phid' => null,
         'phid' => array(
           'columns' => array('phid'),
           'unique' => true,
         ),
         'bloggerPosts' => array(
           'columns' => array(
             'bloggerPHID',
             'visibility',
             'datePublished',
             'id',
           ),
         ),
       ),
     ) + parent::getConfiguration();
   }
 
   public function save() {
     if (!$this->getMailKey()) {
       $this->setMailKey(Filesystem::readRandomCharacters(20));
     }
     return parent::save();
   }
 
   public function generatePHID() {
     return PhabricatorPHID::generateNewPHID(
       PhabricatorPhamePostPHIDType::TYPECONST);
   }
 
   public function getSlug() {
     return PhabricatorSlug::normalizeProjectSlug($this->getTitle());
   }
 
   public function getHeaderImageURI() {
     return $this->getHeaderImageFile()->getBestURI();
   }
 
   public function attachHeaderImageFile(PhabricatorFile $file) {
     $this->headerImageFile = $file;
     return $this;
   }
 
   public function getHeaderImageFile() {
     return $this->assertAttached($this->headerImageFile);
   }
 
 
 /* -(  PhabricatorPolicyInterface Implementation  )-------------------------- */
 
 
   public function getCapabilities() {
     return array(
       PhabricatorPolicyCapability::CAN_VIEW,
       PhabricatorPolicyCapability::CAN_EDIT,
     );
   }
 
   public function getPolicy($capability) {
     // Draft posts are visible only to the author. Published posts are visible
     // to whoever the blog is visible to.
 
     switch ($capability) {
       case PhabricatorPolicyCapability::CAN_VIEW:
         if (!$this->isDraft() && !$this->isArchived() && $this->getBlog()) {
           return $this->getBlog()->getViewPolicy();
         } else if ($this->getBlog()) {
           return $this->getBlog()->getEditPolicy();
         } else {
           return PhabricatorPolicies::POLICY_NOONE;
         }
         break;
       case PhabricatorPolicyCapability::CAN_EDIT:
         if ($this->getBlog()) {
           return $this->getBlog()->getEditPolicy();
         } else {
           return PhabricatorPolicies::POLICY_NOONE;
         }
     }
   }
 
   public function hasAutomaticCapability($capability, PhabricatorUser $user) {
     // A blog post's author can always view it.
 
     switch ($capability) {
       case PhabricatorPolicyCapability::CAN_VIEW:
       case PhabricatorPolicyCapability::CAN_EDIT:
         return ($user->getPHID() == $this->getBloggerPHID());
     }
   }
 
   public function describeAutomaticCapability($capability) {
     return pht('The author of a blog post can always view and edit it.');
   }
 
 
 /* -(  PhabricatorMarkupInterface Implementation  )-------------------------- */
 
 
   public function getMarkupFieldKey($field) {
-    $hash = PhabricatorHash::digest($this->getMarkupText($field));
-    return $this->getPHID().':'.$field.':'.$hash;
+    $content = $this->getMarkupText($field);
+    return PhabricatorMarkupEngine::digestRemarkupContent($this, $content);
   }
 
   public function newMarkupEngine($field) {
     return PhabricatorMarkupEngine::newPhameMarkupEngine();
   }
 
   public function getMarkupText($field) {
     switch ($field) {
       case self::MARKUP_FIELD_BODY:
         return $this->getBody();
       case self::MARKUP_FIELD_SUMMARY:
         return PhabricatorMarkupEngine::summarize($this->getBody());
     }
   }
 
   public function didMarkupText(
     $field,
     $output,
     PhutilMarkupEngine $engine) {
     return $output;
   }
 
   public function shouldUseMarkupCache($field) {
     return (bool)$this->getPHID();
   }
 
 
 /* -(  PhabricatorApplicationTransactionInterface  )------------------------- */
 
 
   public function getApplicationTransactionEditor() {
     return new PhamePostEditor();
   }
 
   public function getApplicationTransactionObject() {
     return $this;
   }
 
   public function getApplicationTransactionTemplate() {
     return new PhamePostTransaction();
   }
 
   public function willRenderTimeline(
     PhabricatorApplicationTransactionView $timeline,
     AphrontRequest $request) {
 
     return $timeline;
   }
 
 
 /* -(  PhabricatorDestructibleInterface  )----------------------------------- */
 
 
   public function destroyObjectPermanently(
     PhabricatorDestructionEngine $engine) {
 
     $this->openTransaction();
       $this->delete();
     $this->saveTransaction();
   }
 
 
 /* -(  PhabricatorTokenReceiverInterface  )---------------------------------- */
 
 
   public function getUsersToNotifyOfTokenGiven() {
     return array(
       $this->getBloggerPHID(),
     );
   }
 
 
 /* -(  PhabricatorSubscribableInterface Implementation  )-------------------- */
 
 
   public function isAutomaticallySubscribed($phid) {
     return ($this->bloggerPHID == $phid);
   }
 
 
 /* -(  PhabricatorConduitResultInterface  )---------------------------------- */
 
 
   public function getFieldSpecificationsForConduit() {
     return array(
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('title')
         ->setType('string')
         ->setDescription(pht('Title of the post.')),
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('slug')
         ->setType('string')
         ->setDescription(pht('Slug for the post.')),
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('blogPHID')
         ->setType('phid')
         ->setDescription(pht('PHID of the blog that the post belongs to.')),
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('authorPHID')
         ->setType('phid')
         ->setDescription(pht('PHID of the author of the post.')),
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('body')
         ->setType('string')
         ->setDescription(pht('Body of the post.')),
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('datePublished')
         ->setType('epoch?')
         ->setDescription(pht('Publish date, if the post has been published.')),
 
     );
   }
 
   public function getFieldValuesForConduit() {
     if ($this->isDraft()) {
       $date_published = null;
     } else if ($this->isArchived()) {
       $date_published = null;
     } else {
       $date_published = (int)$this->getDatePublished();
     }
 
     return array(
       'title' => $this->getTitle(),
       'slug' => $this->getSlug(),
       'blogPHID' => $this->getBlogPHID(),
       'authorPHID' => $this->getBloggerPHID(),
       'body' => $this->getBody(),
       'datePublished' => $date_published,
     );
   }
 
   public function getConduitSearchAttachments() {
     return array();
   }
 
 
 /* -(  PhabricatorFulltextInterface  )--------------------------------------- */
 
   public function newFulltextEngine() {
     return new PhamePostFulltextEngine();
   }
 
 }
diff --git a/src/applications/pholio/storage/PholioImage.php b/src/applications/pholio/storage/PholioImage.php
index e81c71a05a..70f6e8b8c4 100644
--- a/src/applications/pholio/storage/PholioImage.php
+++ b/src/applications/pholio/storage/PholioImage.php
@@ -1,122 +1,122 @@
 <?php
 
 final class PholioImage extends PholioDAO
   implements
     PhabricatorMarkupInterface,
     PhabricatorPolicyInterface {
 
   const MARKUP_FIELD_DESCRIPTION  = 'markup:description';
 
   protected $mockID;
   protected $filePHID;
   protected $name = '';
   protected $description = '';
   protected $sequence;
   protected $isObsolete = 0;
   protected $replacesImagePHID = null;
 
   private $inlineComments = self::ATTACHABLE;
   private $file = self::ATTACHABLE;
   private $mock = self::ATTACHABLE;
 
   protected function getConfiguration() {
     return array(
       self::CONFIG_AUX_PHID => true,
       self::CONFIG_COLUMN_SCHEMA => array(
         'mockID' => 'id?',
         'name' => 'text128',
         'description' => 'text',
         'sequence' => 'uint32',
         'isObsolete' => 'bool',
         'replacesImagePHID' => 'phid?',
       ),
       self::CONFIG_KEY_SCHEMA => array(
         'key_phid' => null,
         'keyPHID' => array(
           'columns' => array('phid'),
           'unique' => true,
         ),
         'mockID' => array(
           'columns' => array('mockID', 'isObsolete', 'sequence'),
         ),
       ),
     ) + parent::getConfiguration();
   }
 
   public function generatePHID() {
     return PhabricatorPHID::generateNewPHID(PholioImagePHIDType::TYPECONST);
   }
 
   public function attachFile(PhabricatorFile $file) {
     $this->file = $file;
     return $this;
   }
 
   public function getFile() {
     $this->assertAttached($this->file);
     return $this->file;
   }
 
   public function attachMock(PholioMock $mock) {
     $this->mock = $mock;
     return $this;
   }
 
   public function getMock() {
     $this->assertAttached($this->mock);
     return $this->mock;
   }
 
 
   public function attachInlineComments(array $inline_comments) {
     assert_instances_of($inline_comments, 'PholioTransactionComment');
     $this->inlineComments = $inline_comments;
     return $this;
   }
 
   public function getInlineComments() {
     $this->assertAttached($this->inlineComments);
     return $this->inlineComments;
   }
 
 
 /* -(  PhabricatorMarkupInterface  )----------------------------------------- */
 
 
   public function getMarkupFieldKey($field) {
-    $hash = PhabricatorHash::digest($this->getMarkupText($field));
-    return 'M:'.$hash;
+    $content = $this->getMarkupText($field);
+    return PhabricatorMarkupEngine::digestRemarkupContent($this, $content);
   }
 
   public function newMarkupEngine($field) {
     return PhabricatorMarkupEngine::newMarkupEngine(array());
   }
 
   public function getMarkupText($field) {
     return $this->getDescription();
   }
 
   public function didMarkupText($field, $output, PhutilMarkupEngine $engine) {
     return $output;
   }
 
   public function shouldUseMarkupCache($field) {
     return (bool)$this->getID();
   }
 
 /* -(  PhabricatorPolicyInterface Implementation  )-------------------------- */
 
   public function getCapabilities() {
     return $this->getMock()->getCapabilities();
   }
 
   public function getPolicy($capability) {
     return $this->getMock()->getPolicy($capability);
   }
 
   // really the *mock* controls who can see an image
   public function hasAutomaticCapability($capability, PhabricatorUser $viewer) {
     return $this->getMock()->hasAutomaticCapability($capability, $viewer);
   }
 
 }
diff --git a/src/applications/pholio/storage/PholioMock.php b/src/applications/pholio/storage/PholioMock.php
index 00e8efd981..7f58a95511 100644
--- a/src/applications/pholio/storage/PholioMock.php
+++ b/src/applications/pholio/storage/PholioMock.php
@@ -1,323 +1,323 @@
 <?php
 
 final class PholioMock extends PholioDAO
   implements
     PhabricatorMarkupInterface,
     PhabricatorPolicyInterface,
     PhabricatorSubscribableInterface,
     PhabricatorTokenReceiverInterface,
     PhabricatorFlaggableInterface,
     PhabricatorApplicationTransactionInterface,
     PhabricatorProjectInterface,
     PhabricatorDestructibleInterface,
     PhabricatorSpacesInterface,
     PhabricatorMentionableInterface,
     PhabricatorFulltextInterface {
 
   const MARKUP_FIELD_DESCRIPTION  = 'markup:description';
 
   const STATUS_OPEN = 'open';
   const STATUS_CLOSED = 'closed';
 
   protected $authorPHID;
   protected $viewPolicy;
   protected $editPolicy;
 
   protected $name;
   protected $originalName;
   protected $description;
   protected $coverPHID;
   protected $mailKey;
   protected $status;
   protected $spacePHID;
 
   private $images = self::ATTACHABLE;
   private $allImages = self::ATTACHABLE;
   private $coverFile = self::ATTACHABLE;
   private $tokenCount = self::ATTACHABLE;
 
   public static function initializeNewMock(PhabricatorUser $actor) {
     $app = id(new PhabricatorApplicationQuery())
       ->setViewer($actor)
       ->withClasses(array('PhabricatorPholioApplication'))
       ->executeOne();
 
     $view_policy = $app->getPolicy(PholioDefaultViewCapability::CAPABILITY);
     $edit_policy = $app->getPolicy(PholioDefaultEditCapability::CAPABILITY);
 
     return id(new PholioMock())
       ->setAuthorPHID($actor->getPHID())
       ->attachImages(array())
       ->setStatus(self::STATUS_OPEN)
       ->setViewPolicy($view_policy)
       ->setEditPolicy($edit_policy)
       ->setSpacePHID($actor->getDefaultSpacePHID());
   }
 
   public function getMonogram() {
     return 'M'.$this->getID();
   }
 
   protected function getConfiguration() {
     return array(
       self::CONFIG_AUX_PHID => true,
       self::CONFIG_COLUMN_SCHEMA => array(
         'name' => 'text128',
         'description' => 'text',
         'originalName' => 'text128',
         'mailKey' => 'bytes20',
         'status' => 'text12',
       ),
       self::CONFIG_KEY_SCHEMA => array(
         'key_phid' => null,
         'phid' => array(
           'columns' => array('phid'),
           'unique' => true,
         ),
         'authorPHID' => array(
           'columns' => array('authorPHID'),
         ),
       ),
     ) + parent::getConfiguration();
   }
 
   public function generatePHID() {
     return PhabricatorPHID::generateNewPHID('MOCK');
   }
 
   public function save() {
     if (!$this->getMailKey()) {
       $this->setMailKey(Filesystem::readRandomCharacters(20));
     }
     return parent::save();
   }
 
   /**
    * These should be the images currently associated with the Mock.
    */
   public function attachImages(array $images) {
     assert_instances_of($images, 'PholioImage');
     $this->images = $images;
     return $this;
   }
 
   public function getImages() {
     $this->assertAttached($this->images);
     return $this->images;
   }
 
   /**
    * These should be *all* images associated with the Mock. This includes
    * images which have been removed and / or replaced from the Mock.
    */
   public function attachAllImages(array $images) {
     assert_instances_of($images, 'PholioImage');
     $this->allImages = $images;
     return $this;
   }
 
   public function getAllImages() {
     $this->assertAttached($this->images);
     return $this->allImages;
   }
 
   public function attachCoverFile(PhabricatorFile $file) {
     $this->coverFile = $file;
     return $this;
   }
 
   public function getCoverFile() {
     $this->assertAttached($this->coverFile);
     return $this->coverFile;
   }
 
   public function getTokenCount() {
     $this->assertAttached($this->tokenCount);
     return $this->tokenCount;
   }
 
   public function attachTokenCount($count) {
     $this->tokenCount = $count;
     return $this;
   }
 
   public function getImageHistorySet($image_id) {
     $images = $this->getAllImages();
     $images = mpull($images, null, 'getID');
     $selected_image = $images[$image_id];
 
     $replace_map = mpull($images, null, 'getReplacesImagePHID');
     $phid_map = mpull($images, null, 'getPHID');
 
     // find the earliest image
     $image = $selected_image;
     while (isset($phid_map[$image->getReplacesImagePHID()])) {
       $image = $phid_map[$image->getReplacesImagePHID()];
     }
 
     // now build history moving forward
     $history = array($image->getID() => $image);
     while (isset($replace_map[$image->getPHID()])) {
       $image = $replace_map[$image->getPHID()];
       $history[$image->getID()] = $image;
     }
 
     return $history;
   }
 
   public function getStatuses() {
     $options = array();
     $options[self::STATUS_OPEN] = pht('Open');
     $options[self::STATUS_CLOSED] = pht('Closed');
     return $options;
   }
 
   public function isClosed() {
     return ($this->getStatus() == 'closed');
   }
 
 
 /* -(  PhabricatorSubscribableInterface Implementation  )-------------------- */
 
 
   public function isAutomaticallySubscribed($phid) {
     return ($this->authorPHID == $phid);
   }
 
 
 /* -(  PhabricatorPolicyInterface Implementation  )-------------------------- */
 
 
   public function getCapabilities() {
     return array(
       PhabricatorPolicyCapability::CAN_VIEW,
       PhabricatorPolicyCapability::CAN_EDIT,
     );
   }
 
   public function getPolicy($capability) {
     switch ($capability) {
       case PhabricatorPolicyCapability::CAN_VIEW:
         return $this->getViewPolicy();
       case PhabricatorPolicyCapability::CAN_EDIT:
         return $this->getEditPolicy();
     }
   }
 
   public function hasAutomaticCapability($capability, PhabricatorUser $viewer) {
     return ($viewer->getPHID() == $this->getAuthorPHID());
   }
 
   public function describeAutomaticCapability($capability) {
     return pht("A mock's owner can always view and edit it.");
   }
 
 
 /* -(  PhabricatorMarkupInterface  )----------------------------------------- */
 
 
   public function getMarkupFieldKey($field) {
-    $hash = PhabricatorHash::digest($this->getMarkupText($field));
-    return 'M:'.$hash;
+    $content = $this->getMarkupText($field);
+    return PhabricatorMarkupEngine::digestRemarkupContent($this, $content);
   }
 
   public function newMarkupEngine($field) {
     return PhabricatorMarkupEngine::newMarkupEngine(array());
   }
 
   public function getMarkupText($field) {
     if ($this->getDescription()) {
       return $this->getDescription();
     }
 
     return null;
   }
 
   public function didMarkupText($field, $output, PhutilMarkupEngine $engine) {
     require_celerity_resource('phabricator-remarkup-css');
     return phutil_tag(
       'div',
       array(
         'class' => 'phabricator-remarkup',
       ),
       $output);
   }
 
   public function shouldUseMarkupCache($field) {
     return (bool)$this->getID();
   }
 
 
 /* -(  PhabricatorApplicationTransactionInterface  )------------------------- */
 
 
   public function getApplicationTransactionEditor() {
     return new PholioMockEditor();
   }
 
   public function getApplicationTransactionObject() {
     return $this;
   }
 
   public function getApplicationTransactionTemplate() {
     return new PholioTransaction();
   }
 
   public function willRenderTimeline(
     PhabricatorApplicationTransactionView $timeline,
     AphrontRequest $request) {
 
     PholioMockQuery::loadImages(
       $request->getUser(),
       array($this),
       $need_inline_comments = true);
     $timeline->setMock($this);
     return $timeline;
   }
 
 /* -(  PhabricatorTokenReceiverInterface  )---------------------------------- */
 
 
   public function getUsersToNotifyOfTokenGiven() {
     return array(
       $this->getAuthorPHID(),
     );
   }
 
 
 /* -(  PhabricatorDestructibleInterface  )----------------------------------- */
 
 
   public function destroyObjectPermanently(
     PhabricatorDestructionEngine $engine) {
 
     $this->openTransaction();
       $images = id(new PholioImage())->loadAllWhere(
         'mockID = %d',
         $this->getID());
       foreach ($images as $image) {
         $image->delete();
       }
 
       $this->delete();
     $this->saveTransaction();
   }
 
 
 /* -(  PhabricatorSpacesInterface  )----------------------------------------- */
 
 
   public function getSpacePHID() {
     return $this->spacePHID;
   }
 
 
 /* -(  PhabricatorFulltextInterface  )--------------------------------------- */
 
 
   public function newFulltextEngine() {
     return new PholioMockFulltextEngine();
   }
 
 
 }
diff --git a/src/applications/phriction/storage/PhrictionContent.php b/src/applications/phriction/storage/PhrictionContent.php
index 3a2e20aa29..0492534797 100644
--- a/src/applications/phriction/storage/PhrictionContent.php
+++ b/src/applications/phriction/storage/PhrictionContent.php
@@ -1,131 +1,127 @@
 <?php
 
 /**
  * @task markup Markup Interface
  */
 final class PhrictionContent extends PhrictionDAO
   implements PhabricatorMarkupInterface {
 
   const MARKUP_FIELD_BODY = 'markup:body';
 
   protected $id;
   protected $documentID;
   protected $version;
   protected $authorPHID;
 
   protected $title;
   protected $slug;
   protected $content;
   protected $description;
 
   protected $changeType;
   protected $changeRef;
 
   private $renderedTableOfContents;
 
   public function renderContent(PhabricatorUser $viewer) {
     return PhabricatorMarkupEngine::renderOneObject(
       $this,
       self::MARKUP_FIELD_BODY,
       $viewer,
       $this);
   }
 
   protected function getConfiguration() {
     return array(
       self::CONFIG_COLUMN_SCHEMA => array(
         'version' => 'uint32',
         'title' => 'sort',
         'slug' => 'text128',
         'content' => 'text',
         'changeType' => 'uint32',
         'changeRef' => 'uint32?',
 
         // T6203/NULLABILITY
         // This should just be empty if not provided?
         'description' => 'text?',
       ),
       self::CONFIG_KEY_SCHEMA => array(
         'documentID' => array(
           'columns' => array('documentID', 'version'),
           'unique' => true,
         ),
         'authorPHID' => array(
           'columns' => array('authorPHID'),
         ),
         'slug' => array(
           'columns' => array('slug'),
         ),
       ),
     ) + parent::getConfiguration();
   }
 
 
 /* -(  Markup Interface  )--------------------------------------------------- */
 
 
   /**
    * @task markup
    */
   public function getMarkupFieldKey($field) {
-    if ($this->shouldUseMarkupCache($field)) {
-      $id = $this->getID();
-    } else {
-      $id = PhabricatorHash::digest($this->getMarkupText($field));
-    }
-    return "phriction:{$field}:{$id}";
+    $content = $this->getMarkupText($field);
+    return PhabricatorMarkupEngine::digestRemarkupContent($this, $content);
   }
 
 
   /**
    * @task markup
    */
   public function getMarkupText($field) {
     return $this->getContent();
   }
 
 
   /**
    * @task markup
    */
   public function newMarkupEngine($field) {
     return PhabricatorMarkupEngine::newPhrictionMarkupEngine();
   }
 
 
   /**
    * @task markup
    */
   public function didMarkupText(
     $field,
     $output,
     PhutilMarkupEngine $engine) {
 
     $this->renderedTableOfContents =
       PhutilRemarkupHeaderBlockRule::renderTableOfContents($engine);
 
     return phutil_tag(
       'div',
       array(
         'class' => 'phabricator-remarkup',
       ),
       $output);
   }
 
   /**
    * @task markup
    */
   public function getRenderedTableOfContents() {
     return $this->renderedTableOfContents;
   }
 
 
   /**
    * @task markup
    */
   public function shouldUseMarkupCache($field) {
     return (bool)$this->getID();
   }
 
 
 }
diff --git a/src/applications/ponder/storage/PonderAnswer.php b/src/applications/ponder/storage/PonderAnswer.php
index 76c9057497..f9e3e8eb8d 100644
--- a/src/applications/ponder/storage/PonderAnswer.php
+++ b/src/applications/ponder/storage/PonderAnswer.php
@@ -1,234 +1,233 @@
 <?php
 
 final class PonderAnswer extends PonderDAO
   implements
     PhabricatorApplicationTransactionInterface,
     PhabricatorMarkupInterface,
     PhabricatorPolicyInterface,
     PhabricatorFlaggableInterface,
     PhabricatorSubscribableInterface,
     PhabricatorDestructibleInterface {
 
   const MARKUP_FIELD_CONTENT = 'markup:content';
 
   protected $authorPHID;
   protected $questionID;
 
   protected $content;
   protected $mailKey;
   protected $status;
   protected $voteCount;
 
   private $question = self::ATTACHABLE;
   private $comments;
 
   public static function initializeNewAnswer(
     PhabricatorUser $actor,
     PonderQuestion $question) {
     $app = id(new PhabricatorApplicationQuery())
       ->setViewer($actor)
       ->withClasses(array('PhabricatorPonderApplication'))
       ->executeOne();
 
     return id(new PonderAnswer())
       ->setQuestionID($question->getID())
       ->setContent('')
       ->attachQuestion($question)
       ->setAuthorPHID($actor->getPHID())
       ->setVoteCount(0)
       ->setStatus(PonderAnswerStatus::ANSWER_STATUS_VISIBLE);
 
   }
 
   public function attachQuestion(PonderQuestion $question = null) {
     $this->question = $question;
     return $this;
   }
 
   public function getQuestion() {
     return $this->assertAttached($this->question);
   }
 
   public function getURI() {
     return '/Q'.$this->getQuestionID().'#A'.$this->getID();
   }
 
   public function setComments($comments) {
     $this->comments = $comments;
     return $this;
   }
 
   public function getComments() {
     return $this->comments;
   }
 
   protected function getConfiguration() {
     return array(
       self::CONFIG_AUX_PHID => true,
       self::CONFIG_COLUMN_SCHEMA => array(
         'voteCount' => 'sint32',
         'content' => 'text',
         'status' => 'text32',
         'mailKey' => 'bytes20',
       ),
       self::CONFIG_KEY_SCHEMA => array(
         'key_phid' => null,
         'phid' => array(
           'columns' => array('phid'),
           'unique' => true,
         ),
         'key_oneanswerperquestion' => array(
           'columns' => array('questionID', 'authorPHID'),
           'unique' => true,
         ),
         'questionID' => array(
           'columns' => array('questionID'),
         ),
         'authorPHID' => array(
           'columns' => array('authorPHID'),
         ),
         'status' => array(
           'columns' => array('status'),
         ),
       ),
     ) + parent::getConfiguration();
   }
 
   public function generatePHID() {
     return PhabricatorPHID::generateNewPHID(PonderAnswerPHIDType::TYPECONST);
   }
 
   public function getMarkupField() {
     return self::MARKUP_FIELD_CONTENT;
   }
 
   public function save() {
     if (!$this->getMailKey()) {
       $this->setMailKey(Filesystem::readRandomCharacters(20));
     }
     return parent::save();
   }
 
 
 /* -(  PhabricatorApplicationTransactionInterface  )------------------------- */
 
 
   public function getApplicationTransactionEditor() {
     return new PonderAnswerEditor();
   }
 
   public function getApplicationTransactionObject() {
     return $this;
   }
 
   public function getApplicationTransactionTemplate() {
     return new PonderAnswerTransaction();
   }
 
   public function willRenderTimeline(
     PhabricatorApplicationTransactionView $timeline,
     AphrontRequest $request) {
 
     return $timeline;
   }
 
 
   // Markup interface
 
   public function getMarkupFieldKey($field) {
-    $hash = PhabricatorHash::digest($this->getMarkupText($field));
-    $id = $this->getID();
-    return "ponder:A{$id}:{$field}:{$hash}";
+    $content = $this->getMarkupText($field);
+    return PhabricatorMarkupEngine::digestRemarkupContent($this, $content);
   }
 
   public function getMarkupText($field) {
     return $this->getContent();
   }
 
   public function newMarkupEngine($field) {
     return PhabricatorMarkupEngine::getEngine();
   }
 
   public function didMarkupText(
     $field,
     $output,
     PhutilMarkupEngine $engine) {
     return $output;
   }
 
   public function shouldUseMarkupCache($field) {
     return (bool)$this->getID();
   }
 
 
 /* -(  PhabricatorPolicyInterface  )----------------------------------------- */
 
 
   public function getCapabilities() {
     return array(
       PhabricatorPolicyCapability::CAN_VIEW,
       PhabricatorPolicyCapability::CAN_EDIT,
     );
   }
 
   public function getPolicy($capability) {
     switch ($capability) {
       case PhabricatorPolicyCapability::CAN_VIEW:
         return $this->getQuestion()->getPolicy($capability);
       case PhabricatorPolicyCapability::CAN_EDIT:
         $app = PhabricatorApplication::getByClass(
           'PhabricatorPonderApplication');
         return $app->getPolicy(PonderModerateCapability::CAPABILITY);
     }
   }
 
   public function hasAutomaticCapability($capability, PhabricatorUser $viewer) {
     switch ($capability) {
       case PhabricatorPolicyCapability::CAN_VIEW:
         if ($this->getAuthorPHID() == $viewer->getPHID()) {
           return true;
         }
         return $this->getQuestion()->hasAutomaticCapability(
           $capability,
           $viewer);
       case PhabricatorPolicyCapability::CAN_EDIT:
         return ($this->getAuthorPHID() == $viewer->getPHID());
     }
   }
 
 
   public function describeAutomaticCapability($capability) {
     $out = array();
     $out[] = pht('The author of an answer can always view and edit it.');
     switch ($capability) {
       case PhabricatorPolicyCapability::CAN_VIEW:
         $out[] = pht(
           'The user who asks a question can always view the answers.');
         $out[] = pht(
           'A moderator can always view the answers.');
         break;
     }
     return $out;
   }
 
 
 /* -(  PhabricatorSubscribableInterface  )----------------------------------- */
 
 
   public function isAutomaticallySubscribed($phid) {
     return ($phid == $this->getAuthorPHID());
   }
 
 
 /* -(  PhabricatorDestructibleInterface  )----------------------------------- */
 
 
   public function destroyObjectPermanently(
     PhabricatorDestructionEngine $engine) {
 
     $this->openTransaction();
       $this->delete();
     $this->saveTransaction();
   }
 
 }
diff --git a/src/applications/ponder/storage/PonderQuestion.php b/src/applications/ponder/storage/PonderQuestion.php
index d302bbfc29..6594219f5a 100644
--- a/src/applications/ponder/storage/PonderQuestion.php
+++ b/src/applications/ponder/storage/PonderQuestion.php
@@ -1,296 +1,295 @@
 <?php
 
 final class PonderQuestion extends PonderDAO
   implements
     PhabricatorApplicationTransactionInterface,
     PhabricatorMarkupInterface,
     PhabricatorSubscribableInterface,
     PhabricatorFlaggableInterface,
     PhabricatorPolicyInterface,
     PhabricatorTokenReceiverInterface,
     PhabricatorProjectInterface,
     PhabricatorDestructibleInterface,
     PhabricatorSpacesInterface,
     PhabricatorFulltextInterface {
 
   const MARKUP_FIELD_CONTENT = 'markup:content';
 
   protected $title;
   protected $phid;
 
   protected $authorPHID;
   protected $status;
   protected $content;
   protected $answerWiki;
   protected $contentSource;
   protected $viewPolicy;
   protected $spacePHID;
 
   protected $answerCount;
   protected $mailKey;
 
   private $answers;
   private $comments;
 
   private $projectPHIDs = self::ATTACHABLE;
 
   public static function initializeNewQuestion(PhabricatorUser $actor) {
     $app = id(new PhabricatorApplicationQuery())
       ->setViewer($actor)
       ->withClasses(array('PhabricatorPonderApplication'))
       ->executeOne();
 
     $view_policy = $app->getPolicy(
       PonderDefaultViewCapability::CAPABILITY);
 
     return id(new PonderQuestion())
       ->setAuthorPHID($actor->getPHID())
       ->setViewPolicy($view_policy)
       ->setStatus(PonderQuestionStatus::STATUS_OPEN)
       ->setAnswerCount(0)
       ->setAnswerWiki('')
       ->setSpacePHID($actor->getDefaultSpacePHID());
   }
 
   protected function getConfiguration() {
     return array(
       self::CONFIG_AUX_PHID => true,
       self::CONFIG_COLUMN_SCHEMA => array(
         'title' => 'text255',
         'status' => 'text32',
         'content' => 'text',
         'answerWiki' => 'text',
         'answerCount' => 'uint32',
         'mailKey' => 'bytes20',
 
         // T6203/NULLABILITY
         // This should always exist.
         'contentSource' => 'text?',
       ),
       self::CONFIG_KEY_SCHEMA => array(
         'key_phid' => null,
         'phid' => array(
           'columns' => array('phid'),
           'unique' => true,
         ),
         'authorPHID' => array(
           'columns' => array('authorPHID'),
         ),
         'status' => array(
           'columns' => array('status'),
         ),
       ),
     ) + parent::getConfiguration();
   }
 
   public function generatePHID() {
     return PhabricatorPHID::generateNewPHID(PonderQuestionPHIDType::TYPECONST);
   }
 
   public function setContentSource(PhabricatorContentSource $content_source) {
     $this->contentSource = $content_source->serialize();
     return $this;
   }
 
   public function getContentSource() {
     return PhabricatorContentSource::newFromSerialized($this->contentSource);
   }
 
   public function setComments($comments) {
     $this->comments = $comments;
     return $this;
   }
 
   public function getComments() {
     return $this->comments;
   }
 
   public function attachAnswers(array $answers) {
     assert_instances_of($answers, 'PonderAnswer');
     $this->answers = $answers;
     return $this;
   }
 
   public function getAnswers() {
     return $this->answers;
   }
 
   public function getProjectPHIDs() {
     return $this->assertAttached($this->projectPHIDs);
   }
 
   public function attachProjectPHIDs(array $phids) {
     $this->projectPHIDs = $phids;
     return $this;
   }
 
   public function getMarkupField() {
     return self::MARKUP_FIELD_CONTENT;
   }
 
 
 /* -(  PhabricatorApplicationTransactionInterface  )------------------------- */
 
 
   public function getApplicationTransactionEditor() {
     return new PonderQuestionEditor();
   }
 
   public function getApplicationTransactionObject() {
     return $this;
   }
 
   public function getApplicationTransactionTemplate() {
     return new PonderQuestionTransaction();
   }
 
   public function willRenderTimeline(
     PhabricatorApplicationTransactionView $timeline,
     AphrontRequest $request) {
 
     return $timeline;
   }
 
 
   // Markup interface
 
   public function getMarkupFieldKey($field) {
-    $hash = PhabricatorHash::digest($this->getMarkupText($field));
-    $id = $this->getID();
-    return "ponder:Q{$id}:{$field}:{$hash}";
+    $content = $this->getMarkupText($field);
+    return PhabricatorMarkupEngine::digestRemarkupContent($this, $content);
   }
 
   public function getMarkupText($field) {
     return $this->getContent();
   }
 
   public function newMarkupEngine($field) {
     return PhabricatorMarkupEngine::getEngine();
   }
 
   public function didMarkupText(
     $field,
     $output,
     PhutilMarkupEngine $engine) {
     return $output;
   }
 
   public function shouldUseMarkupCache($field) {
     return (bool)$this->getID();
   }
 
   public function save() {
     if (!$this->getMailKey()) {
       $this->setMailKey(Filesystem::readRandomCharacters(20));
     }
     return parent::save();
   }
 
   public function getOriginalTitle() {
     // TODO: Make this actually save/return the original title.
     return $this->getTitle();
   }
 
   public function getFullTitle() {
     $id = $this->getID();
     $title = $this->getTitle();
     return "Q{$id}: {$title}";
   }
 
 
 /* -(  PhabricatorPolicyInterface  )----------------------------------------- */
 
   public function getCapabilities() {
     return array(
       PhabricatorPolicyCapability::CAN_VIEW,
       PhabricatorPolicyCapability::CAN_EDIT,
     );
   }
 
   public function getPolicy($capability) {
     switch ($capability) {
       case PhabricatorPolicyCapability::CAN_VIEW:
         return $this->getViewPolicy();
       case PhabricatorPolicyCapability::CAN_EDIT:
         $app = PhabricatorApplication::getByClass(
           'PhabricatorPonderApplication');
         return $app->getPolicy(PonderModerateCapability::CAPABILITY);
     }
   }
 
   public function hasAutomaticCapability($capability, PhabricatorUser $viewer) {
     if ($capability == PhabricatorPolicyCapability::CAN_VIEW) {
       if (PhabricatorPolicyFilter::hasCapability(
         $viewer, $this, PhabricatorPolicyCapability::CAN_EDIT)) {
         return true;
       }
     }
     return ($viewer->getPHID() == $this->getAuthorPHID());
   }
 
 
   public function describeAutomaticCapability($capability) {
     $out = array();
     $out[] = pht('The user who asked a question can always view and edit it.');
     switch ($capability) {
       case PhabricatorPolicyCapability::CAN_VIEW:
         $out[] = pht(
           'A moderator can always view the question.');
         break;
     }
     return $out;
   }
 
 
 /* -(  PhabricatorSubscribableInterface  )----------------------------------- */
 
 
   public function isAutomaticallySubscribed($phid) {
     return ($phid == $this->getAuthorPHID());
   }
 
 
 /* -(  PhabricatorTokenReceiverInterface  )---------------------------------- */
 
 
   public function getUsersToNotifyOfTokenGiven() {
     return array(
       $this->getAuthorPHID(),
     );
   }
 
 
 /* -(  PhabricatorDestructibleInterface  )----------------------------------- */
 
   public function destroyObjectPermanently(
     PhabricatorDestructionEngine $engine) {
 
     $this->openTransaction();
       $answers = id(new PonderAnswer())->loadAllWhere(
         'questionID = %d',
         $this->getID());
       foreach ($answers as $answer) {
         $engine->destroyObject($answer);
       }
 
       $this->delete();
     $this->saveTransaction();
   }
 
 
 /* -(  PhabricatorSpacesInterface  )----------------------------------------- */
 
 
   public function getSpacePHID() {
     return $this->spacePHID;
   }
 
 
 /* -(  PhabricatorFulltextInterface  )--------------------------------------- */
 
 
   public function newFulltextEngine() {
     return new PonderQuestionFulltextEngine();
   }
 
 }
diff --git a/src/applications/releeph/field/specification/ReleephFieldSpecification.php b/src/applications/releeph/field/specification/ReleephFieldSpecification.php
index df458ced56..ff95ed6514 100644
--- a/src/applications/releeph/field/specification/ReleephFieldSpecification.php
+++ b/src/applications/releeph/field/specification/ReleephFieldSpecification.php
@@ -1,263 +1,265 @@
 <?php
 
 abstract class ReleephFieldSpecification
   extends PhabricatorCustomField
   implements PhabricatorMarkupInterface {
 
   // TODO: This is temporary, until ReleephFieldSpecification is more conformant
   // to PhabricatorCustomField.
   private $requestValue;
 
   public function readValueFromRequest(AphrontRequest $request) {
     $this->requestValue = $request->getStr($this->getRequiredStorageKey());
     return $this;
   }
 
   public function shouldAppearInPropertyView() {
     return true;
   }
 
   public function renderPropertyViewLabel() {
     return $this->getName();
   }
 
   public function renderPropertyViewValue(array $handles) {
     $key = $this->getRequiredStorageKey();
     $value = $this->getReleephRequest()->getDetail($key);
     if ($value === '') {
       return null;
     }
     return $value;
   }
 
   abstract public function getName();
 
 /* -(  Storage  )------------------------------------------------------------ */
 
   public function getStorageKey() {
     return null;
   }
 
   public function getRequiredStorageKey() {
     $key = $this->getStorageKey();
     if ($key === null) {
       throw new PhabricatorCustomFieldImplementationIncompleteException($this);
     }
     if (strpos($key, '.') !== false) {
       /**
        * Storage keys are reused for form controls, and periods in form control
        * names break HTML forms.
        */
       throw new Exception(pht("You can't use '%s' in storage keys!", '.'));
     }
     return $key;
   }
 
   public function shouldAppearInEditView() {
     return $this->isEditable();
   }
 
   final public function isEditable() {
     return $this->getStorageKey() !== null;
   }
 
   final public function getValue() {
     if ($this->requestValue !== null) {
       return $this->requestValue;
     }
 
     $key = $this->getRequiredStorageKey();
     return $this->getReleephRequest()->getDetail($key);
   }
 
   final public function setValue($value) {
     $key = $this->getRequiredStorageKey();
     return $this->getReleephRequest()->setDetail($key, $value);
   }
 
   /**
    * @throws ReleephFieldParseException, to show an error.
    */
   public function validate($value) {
     return;
   }
 
   /**
    * Turn values as they are stored in a ReleephRequest into a text that can be
    * rendered as a transactions old/new values.
    */
   public function normalizeForTransactionView(
     PhabricatorApplicationTransaction $xaction,
     $value) {
 
     return $value;
   }
 
 
 /* -(  Conduit  )------------------------------------------------------------ */
 
   public function getKeyForConduit() {
     return $this->getRequiredStorageKey();
   }
 
   public function getValueForConduit() {
     return $this->getValue();
   }
 
   public function setValueFromConduitAPIRequest(ConduitAPIRequest $request) {
     $value = idx(
       $request->getValue('fields', array()),
       $this->getRequiredStorageKey());
     $this->validate($value);
     $this->setValue($value);
     return $this;
   }
 
 
 /* -(  Arcanist  )----------------------------------------------------------- */
 
   public function renderHelpForArcanist() {
     return '';
   }
 
 
 /* -(  Context  )------------------------------------------------------------ */
 
   private $releephProject;
   private $releephBranch;
   private $releephRequest;
   private $user;
 
   final public function setReleephProject(ReleephProject $rp) {
     $this->releephProject = $rp;
     return $this;
   }
 
   final public function setReleephBranch(ReleephBranch $rb) {
     $this->releephRequest = $rb;
     return $this;
   }
 
   final public function setReleephRequest(ReleephRequest $rr) {
     $this->releephRequest = $rr;
     return $this;
   }
 
   final public function setUser(PhabricatorUser $user) {
     $this->user = $user;
     return $this;
   }
 
   final public function getReleephProject() {
     if (!$this->releephProject) {
       return $this->getReleephBranch()->getProduct();
     }
     return $this->releephProject;
   }
 
   final public function getReleephBranch() {
     if (!$this->releephBranch) {
       return $this->getReleephRequest()->getBranch();
     }
     return $this->releephBranch;
   }
 
   final public function getReleephRequest() {
     if (!$this->releephRequest) {
       return $this->getObject();
     }
     return $this->releephRequest;
   }
 
   final public function getUser() {
     if (!$this->user) {
       return $this->getViewer();
     }
     return $this->user;
   }
 
 /* -(  Commit Messages  )---------------------------------------------------- */
 
   public function shouldAppearOnCommitMessage() {
     return false;
   }
 
   public function renderLabelForCommitMessage() {
     throw new PhabricatorCustomFieldImplementationIncompleteException($this);
   }
 
   public function renderValueForCommitMessage() {
     throw new PhabricatorCustomFieldImplementationIncompleteException($this);
   }
 
   public function shouldAppearOnRevertMessage() {
     return false;
   }
 
   public function renderLabelForRevertMessage() {
     return $this->renderLabelForCommitMessage();
   }
 
   public function renderValueForRevertMessage() {
     return $this->renderValueForCommitMessage();
   }
 
 
 /* -(  Markup Interface  )--------------------------------------------------- */
 
   const MARKUP_FIELD_GENERIC = 'releeph:generic-markup-field';
 
   private $engine;
 
   /**
    * @{class:ReleephFieldSpecification} implements much of
    * @{interface:PhabricatorMarkupInterface} for you. If you return true from
    * `shouldMarkup()`, and implement `getMarkupText()` then your text will be
    * rendered through the Phabricator markup pipeline.
    *
    * Output is retrievable with `getMarkupEngineOutput()`.
    */
   public function shouldMarkup() {
     return false;
   }
 
   public function getMarkupText($field) {
     throw new PhabricatorCustomFieldImplementationIncompleteException($this);
   }
 
   final public function getMarkupEngineOutput() {
     return $this->engine->getOutput($this, self::MARKUP_FIELD_GENERIC);
   }
 
   final public function setMarkupEngine(PhabricatorMarkupEngine $engine) {
     $this->engine = $engine;
     $engine->addObject($this, self::MARKUP_FIELD_GENERIC);
     return $this;
   }
 
   final public function getMarkupFieldKey($field) {
-    return sprintf(
+    $content = sprintf(
       '%s:%s:%s:%s',
       $this->getReleephRequest()->getPHID(),
       $this->getStorageKey(),
       $field,
-      PhabricatorHash::digest($this->getMarkupText($field)));
+      $this->getMarkupText($field));
+
+    return PhabricatorMarkupEngine::digestRemarkupContent($this, $content);
   }
 
   final public function newMarkupEngine($field) {
     return PhabricatorMarkupEngine::newDifferentialMarkupEngine();
   }
 
   final public function didMarkupText(
     $field,
     $output,
     PhutilMarkupEngine $engine) {
 
     return $output;
   }
 
   final public function shouldUseMarkupCache($field) {
     return true;
   }
 
 }
diff --git a/src/infrastructure/markup/PhabricatorMarkupEngine.php b/src/infrastructure/markup/PhabricatorMarkupEngine.php
index 3fbf29c294..ad380414f6 100644
--- a/src/infrastructure/markup/PhabricatorMarkupEngine.php
+++ b/src/infrastructure/markup/PhabricatorMarkupEngine.php
@@ -1,697 +1,712 @@
 <?php
 
 /**
  * Manages markup engine selection, configuration, application, caching and
  * pipelining.
  *
  * @{class:PhabricatorMarkupEngine} can be used to render objects which
  * implement @{interface:PhabricatorMarkupInterface} in a batched, cache-aware
  * way. For example, if you have a list of comments written in remarkup (and
  * the objects implement the correct interface) you can render them by first
  * building an engine and adding the fields with @{method:addObject}.
  *
  *   $field  = 'field:body'; // Field you want to render. Each object exposes
  *                           // one or more fields of markup.
  *
  *   $engine = new PhabricatorMarkupEngine();
  *   foreach ($comments as $comment) {
  *     $engine->addObject($comment, $field);
  *   }
  *
  * Now, call @{method:process} to perform the actual cache/rendering
  * step. This is a heavyweight call which does batched data access and
  * transforms the markup into output.
  *
  *   $engine->process();
  *
  * Finally, do something with the results:
  *
  *   $results = array();
  *   foreach ($comments as $comment) {
  *     $results[] = $engine->getOutput($comment, $field);
  *   }
  *
  * If you have a single object to render, you can use the convenience method
  * @{method:renderOneObject}.
  *
  * @task markup Markup Pipeline
  * @task engine Engine Construction
  */
 final class PhabricatorMarkupEngine extends Phobject {
 
   private $objects = array();
   private $viewer;
   private $contextObject;
   private $version = 16;
   private $engineCaches = array();
   private $auxiliaryConfig = array();
 
 
 /* -(  Markup Pipeline  )---------------------------------------------------- */
 
 
   /**
    * Convenience method for pushing a single object through the markup
    * pipeline.
    *
    * @param PhabricatorMarkupInterface  The object to render.
    * @param string                      The field to render.
    * @param PhabricatorUser             User viewing the markup.
    * @param object                      A context object for policy checks
    * @return string                     Marked up output.
    * @task markup
    */
   public static function renderOneObject(
     PhabricatorMarkupInterface $object,
     $field,
     PhabricatorUser $viewer,
     $context_object = null) {
     return id(new PhabricatorMarkupEngine())
       ->setViewer($viewer)
       ->setContextObject($context_object)
       ->addObject($object, $field)
       ->process()
       ->getOutput($object, $field);
   }
 
 
   /**
    * Queue an object for markup generation when @{method:process} is
    * called. You can retrieve the output later with @{method:getOutput}.
    *
    * @param PhabricatorMarkupInterface  The object to render.
    * @param string                      The field to render.
    * @return this
    * @task markup
    */
   public function addObject(PhabricatorMarkupInterface $object, $field) {
     $key = $this->getMarkupFieldKey($object, $field);
     $this->objects[$key] = array(
       'object' => $object,
       'field'  => $field,
     );
 
     return $this;
   }
 
 
   /**
    * Process objects queued with @{method:addObject}. You can then retrieve
    * the output with @{method:getOutput}.
    *
    * @return this
    * @task markup
    */
   public function process() {
     $keys = array();
     foreach ($this->objects as $key => $info) {
       if (!isset($info['markup'])) {
         $keys[] = $key;
       }
     }
 
     if (!$keys) {
       return $this;
     }
 
     $objects = array_select_keys($this->objects, $keys);
 
     // Build all the markup engines. We need an engine for each field whether
     // we have a cache or not, since we still need to postprocess the cache.
     $engines = array();
     foreach ($objects as $key => $info) {
       $engines[$key] = $info['object']->newMarkupEngine($info['field']);
       $engines[$key]->setConfig('viewer', $this->viewer);
       $engines[$key]->setConfig('contextObject', $this->contextObject);
 
       foreach ($this->auxiliaryConfig as $aux_key => $aux_value) {
         $engines[$key]->setConfig($aux_key, $aux_value);
       }
     }
 
     // Load or build the preprocessor caches.
     $blocks = $this->loadPreprocessorCaches($engines, $objects);
     $blocks = mpull($blocks, 'getCacheData');
 
     $this->engineCaches = $blocks;
 
     // Finalize the output.
     foreach ($objects as $key => $info) {
       $engine = $engines[$key];
       $field = $info['field'];
       $object = $info['object'];
 
       $output = $engine->postprocessText($blocks[$key]);
       $output = $object->didMarkupText($field, $output, $engine);
       $this->objects[$key]['output'] = $output;
     }
 
     return $this;
   }
 
 
   /**
    * Get the output of markup processing for a field queued with
    * @{method:addObject}. Before you can call this method, you must call
    * @{method:process}.
    *
    * @param PhabricatorMarkupInterface  The object to retrieve.
    * @param string                      The field to retrieve.
    * @return string                     Processed output.
    * @task markup
    */
   public function getOutput(PhabricatorMarkupInterface $object, $field) {
     $key = $this->getMarkupFieldKey($object, $field);
     $this->requireKeyProcessed($key);
 
     return $this->objects[$key]['output'];
   }
 
 
   /**
    * Retrieve engine metadata for a given field.
    *
    * @param PhabricatorMarkupInterface  The object to retrieve.
    * @param string                      The field to retrieve.
    * @param string                      The engine metadata field to retrieve.
    * @param wild                        Optional default value.
    * @task markup
    */
   public function getEngineMetadata(
     PhabricatorMarkupInterface $object,
     $field,
     $metadata_key,
     $default = null) {
 
     $key = $this->getMarkupFieldKey($object, $field);
     $this->requireKeyProcessed($key);
 
     return idx($this->engineCaches[$key]['metadata'], $metadata_key, $default);
   }
 
 
   /**
    * @task markup
    */
   private function requireKeyProcessed($key) {
     if (empty($this->objects[$key])) {
       throw new Exception(
         pht(
           "Call %s before using results (key = '%s').",
           'addObject()',
           $key));
     }
 
     if (!isset($this->objects[$key]['output'])) {
       throw new PhutilInvalidStateException('process');
     }
   }
 
 
   /**
    * @task markup
    */
   private function getMarkupFieldKey(
     PhabricatorMarkupInterface $object,
     $field) {
 
     static $custom;
     if ($custom === null) {
       $custom = array_merge(
         self::loadCustomInlineRules(),
         self::loadCustomBlockRules());
 
       $custom = mpull($custom, 'getRuleVersion', null);
       ksort($custom);
       $custom = PhabricatorHash::digestForIndex(serialize($custom));
     }
 
     return $object->getMarkupFieldKey($field).'@'.$this->version.'@'.$custom;
   }
 
 
   /**
    * @task markup
    */
   private function loadPreprocessorCaches(array $engines, array $objects) {
     $blocks = array();
 
     $use_cache = array();
     foreach ($objects as $key => $info) {
       if ($info['object']->shouldUseMarkupCache($info['field'])) {
         $use_cache[$key] = true;
       }
     }
 
     if ($use_cache) {
       try {
         $blocks = id(new PhabricatorMarkupCache())->loadAllWhere(
           'cacheKey IN (%Ls)',
           array_keys($use_cache));
         $blocks = mpull($blocks, null, 'getCacheKey');
       } catch (Exception $ex) {
         phlog($ex);
       }
     }
 
     $is_readonly = PhabricatorEnv::isReadOnly();
 
     foreach ($objects as $key => $info) {
       // False check in case MySQL doesn't support unicode characters
       // in the string (T1191), resulting in unserialize returning false.
       if (isset($blocks[$key]) && $blocks[$key]->getCacheData() !== false) {
         // If we already have a preprocessing cache, we don't need to rebuild
         // it.
         continue;
       }
 
       $text = $info['object']->getMarkupText($info['field']);
       $data = $engines[$key]->preprocessText($text);
 
       // NOTE: This is just debugging information to help sort out cache issues.
       // If one machine is misconfigured and poisoning caches you can use this
       // field to hunt it down.
 
       $metadata = array(
         'host' => php_uname('n'),
       );
 
       $blocks[$key] = id(new PhabricatorMarkupCache())
         ->setCacheKey($key)
         ->setCacheData($data)
         ->setMetadata($metadata);
 
       if (isset($use_cache[$key]) && !$is_readonly) {
         // This is just filling a cache and always safe, even on a read pathway.
         $unguarded = AphrontWriteGuard::beginScopedUnguardedWrites();
           $blocks[$key]->replace();
         unset($unguarded);
       }
     }
 
     return $blocks;
   }
 
 
   /**
    * Set the viewing user. Used to implement object permissions.
    *
    * @param PhabricatorUser The viewing user.
    * @return this
    * @task markup
    */
   public function setViewer(PhabricatorUser $viewer) {
     $this->viewer = $viewer;
     return $this;
   }
 
   /**
    * Set the context object. Used to implement object permissions.
    *
    * @param The object in which context this remarkup is used.
    * @return this
    * @task markup
    */
   public function setContextObject($object) {
     $this->contextObject = $object;
     return $this;
   }
 
   public function setAuxiliaryConfig($key, $value) {
     // TODO: This is gross and should be removed. Avoid use.
     $this->auxiliaryConfig[$key] = $value;
     return $this;
   }
 
 
 /* -(  Engine Construction  )------------------------------------------------ */
 
 
 
   /**
    * @task engine
    */
   public static function newManiphestMarkupEngine() {
     return self::newMarkupEngine(array(
     ));
   }
 
 
   /**
    * @task engine
    */
   public static function newPhrictionMarkupEngine() {
     return self::newMarkupEngine(array(
       'header.generate-toc' => true,
     ));
   }
 
 
   /**
    * @task engine
    */
   public static function newPhameMarkupEngine() {
     return self::newMarkupEngine(
       array(
         'macros' => false,
         'uri.full' => true,
         'uri.same-window' => true,
         'uri.base' => PhabricatorEnv::getURI('/'),
       ));
   }
 
 
   /**
    * @task engine
    */
   public static function newFeedMarkupEngine() {
     return self::newMarkupEngine(
       array(
         'macros'      => false,
         'youtube'     => false,
       ));
   }
 
   /**
    * @task engine
    */
   public static function newCalendarMarkupEngine() {
     return self::newMarkupEngine(array(
     ));
   }
 
 
   /**
    * @task engine
    */
   public static function newDifferentialMarkupEngine(array $options = array()) {
     return self::newMarkupEngine(array(
       'differential.diff' => idx($options, 'differential.diff'),
     ));
   }
 
 
   /**
    * @task engine
    */
   public static function newDiffusionMarkupEngine(array $options = array()) {
     return self::newMarkupEngine(array(
       'header.generate-toc' => true,
     ));
   }
 
   /**
    * @task engine
    */
   public static function getEngine($ruleset = 'default') {
     static $engines = array();
     if (isset($engines[$ruleset])) {
       return $engines[$ruleset];
     }
 
     $engine = null;
     switch ($ruleset) {
       case 'default':
         $engine = self::newMarkupEngine(array());
         break;
       case 'feed':
         $engine = self::newMarkupEngine(array());
         $engine->setConfig('autoplay.disable', true);
         break;
       case 'nolinebreaks':
         $engine = self::newMarkupEngine(array());
         $engine->setConfig('preserve-linebreaks', false);
         break;
       case 'diffusion-readme':
         $engine = self::newMarkupEngine(array());
         $engine->setConfig('preserve-linebreaks', false);
         $engine->setConfig('header.generate-toc', true);
         break;
       case 'diviner':
         $engine = self::newMarkupEngine(array());
         $engine->setConfig('preserve-linebreaks', false);
   //    $engine->setConfig('diviner.renderer', new DivinerDefaultRenderer());
         $engine->setConfig('header.generate-toc', true);
         break;
       case 'extract':
         // Engine used for reference/edge extraction. Turn off anything which
         // is slow and doesn't change reference extraction.
         $engine = self::newMarkupEngine(array());
         $engine->setConfig('pygments.enabled', false);
         break;
       default:
         throw new Exception(pht('Unknown engine ruleset: %s!', $ruleset));
     }
 
     $engines[$ruleset] = $engine;
     return $engine;
   }
 
   /**
    * @task engine
    */
   private static function getMarkupEngineDefaultConfiguration() {
     return array(
       'pygments'      => PhabricatorEnv::getEnvConfig('pygments.enabled'),
       'youtube'       => PhabricatorEnv::getEnvConfig(
         'remarkup.enable-embedded-youtube'),
       'differential.diff' => null,
       'header.generate-toc' => false,
       'macros'        => true,
       'uri.allowed-protocols' => PhabricatorEnv::getEnvConfig(
         'uri.allowed-protocols'),
       'uri.full' => false,
       'syntax-highlighter.engine' => PhabricatorEnv::getEnvConfig(
         'syntax-highlighter.engine'),
       'preserve-linebreaks' => true,
     );
   }
 
 
   /**
    * @task engine
    */
   public static function newMarkupEngine(array $options) {
     $options += self::getMarkupEngineDefaultConfiguration();
 
     $engine = new PhutilRemarkupEngine();
 
     $engine->setConfig('preserve-linebreaks', $options['preserve-linebreaks']);
 
     $engine->setConfig('pygments.enabled', $options['pygments']);
     $engine->setConfig(
       'uri.allowed-protocols',
       $options['uri.allowed-protocols']);
     $engine->setConfig('differential.diff', $options['differential.diff']);
     $engine->setConfig('header.generate-toc', $options['header.generate-toc']);
     $engine->setConfig(
       'syntax-highlighter.engine',
       $options['syntax-highlighter.engine']);
 
     $style_map = id(new PhabricatorDefaultSyntaxStyle())
       ->getRemarkupStyleMap();
     $engine->setConfig('phutil.codeblock.style-map', $style_map);
 
     $engine->setConfig('uri.full', $options['uri.full']);
 
     if (isset($options['uri.base'])) {
       $engine->setConfig('uri.base', $options['uri.base']);
     }
 
     if (isset($options['uri.same-window'])) {
       $engine->setConfig('uri.same-window', $options['uri.same-window']);
     }
 
     $rules = array();
     $rules[] = new PhutilRemarkupEscapeRemarkupRule();
     $rules[] = new PhutilRemarkupMonospaceRule();
 
 
     $rules[] = new PhutilRemarkupDocumentLinkRule();
     $rules[] = new PhabricatorNavigationRemarkupRule();
     $rules[] = new PhabricatorKeyboardRemarkupRule();
 
     if ($options['youtube']) {
       $rules[] = new PhabricatorYoutubeRemarkupRule();
     }
 
     $rules[] = new PhabricatorIconRemarkupRule();
     $rules[] = new PhabricatorEmojiRemarkupRule();
     $rules[] = new PhabricatorHandleRemarkupRule();
 
     $applications = PhabricatorApplication::getAllInstalledApplications();
     foreach ($applications as $application) {
       foreach ($application->getRemarkupRules() as $rule) {
         $rules[] = $rule;
       }
     }
 
     $rules[] = new PhutilRemarkupHyperlinkRule();
 
     if ($options['macros']) {
       $rules[] = new PhabricatorImageMacroRemarkupRule();
       $rules[] = new PhabricatorMemeRemarkupRule();
     }
 
     $rules[] = new PhutilRemarkupBoldRule();
     $rules[] = new PhutilRemarkupItalicRule();
     $rules[] = new PhutilRemarkupDelRule();
     $rules[] = new PhutilRemarkupUnderlineRule();
     $rules[] = new PhutilRemarkupHighlightRule();
 
     foreach (self::loadCustomInlineRules() as $rule) {
       $rules[] = clone $rule;
     }
 
     $blocks = array();
     $blocks[] = new PhutilRemarkupQuotesBlockRule();
     $blocks[] = new PhutilRemarkupReplyBlockRule();
     $blocks[] = new PhutilRemarkupLiteralBlockRule();
     $blocks[] = new PhutilRemarkupHeaderBlockRule();
     $blocks[] = new PhutilRemarkupHorizontalRuleBlockRule();
     $blocks[] = new PhutilRemarkupListBlockRule();
     $blocks[] = new PhutilRemarkupCodeBlockRule();
     $blocks[] = new PhutilRemarkupNoteBlockRule();
     $blocks[] = new PhutilRemarkupTableBlockRule();
     $blocks[] = new PhutilRemarkupSimpleTableBlockRule();
     $blocks[] = new PhutilRemarkupInterpreterBlockRule();
     $blocks[] = new PhutilRemarkupDefaultBlockRule();
 
     foreach (self::loadCustomBlockRules() as $rule) {
       $blocks[] = $rule;
     }
 
     foreach ($blocks as $block) {
       $block->setMarkupRules($rules);
     }
 
     $engine->setBlockRules($blocks);
 
     return $engine;
   }
 
   public static function extractPHIDsFromMentions(
     PhabricatorUser $viewer,
     array $content_blocks) {
 
     $mentions = array();
 
     $engine = self::newDifferentialMarkupEngine();
     $engine->setConfig('viewer', $viewer);
 
     foreach ($content_blocks as $content_block) {
       $engine->markupText($content_block);
       $phids = $engine->getTextMetadata(
         PhabricatorMentionRemarkupRule::KEY_MENTIONED,
         array());
       $mentions += $phids;
     }
 
     return $mentions;
   }
 
   public static function extractFilePHIDsFromEmbeddedFiles(
     PhabricatorUser $viewer,
     array $content_blocks) {
     $files = array();
 
     $engine = self::newDifferentialMarkupEngine();
     $engine->setConfig('viewer', $viewer);
 
     foreach ($content_blocks as $content_block) {
       $engine->markupText($content_block);
       $phids = $engine->getTextMetadata(
         PhabricatorEmbedFileRemarkupRule::KEY_EMBED_FILE_PHIDS,
         array());
       foreach ($phids as $phid) {
         $files[$phid] = $phid;
       }
     }
 
     return array_values($files);
   }
 
   public static function summarizeSentence($corpus) {
     $corpus = trim($corpus);
     $blocks = preg_split('/\n+/', $corpus, 2);
     $block = head($blocks);
 
     $sentences = preg_split(
       '/\b([.?!]+)\B/u',
       $block,
       2,
       PREG_SPLIT_DELIM_CAPTURE);
 
     if (count($sentences) > 1) {
       $result = $sentences[0].$sentences[1];
     } else {
       $result = head($sentences);
     }
 
     return id(new PhutilUTF8StringTruncator())
       ->setMaximumGlyphs(128)
       ->truncateString($result);
   }
 
   /**
    * Produce a corpus summary, in a way that shortens the underlying text
    * without truncating it somewhere awkward.
    *
    * TODO: We could do a better job of this.
    *
    * @param string  Remarkup corpus to summarize.
    * @return string Summarized corpus.
    */
   public static function summarize($corpus) {
 
     // Major goals here are:
     //  - Don't split in the middle of a character (utf-8).
     //  - Don't split in the middle of, e.g., **bold** text, since
     //    we end up with hanging '**' in the summary.
     //  - Try not to pick an image macro, header, embedded file, etc.
     //  - Hopefully don't return too much text. We don't explicitly limit
     //    this right now.
 
     $blocks = preg_split("/\n *\n\s*/", $corpus);
 
     $best = null;
     foreach ($blocks as $block) {
       // This is a test for normal spaces in the block, i.e. a heuristic to
       // distinguish standard paragraphs from things like image macros. It may
       // not work well for non-latin text. We prefer to summarize with a
       // paragraph of normal words over an image macro, if possible.
       $has_space = preg_match('/\w\s\w/', $block);
 
       // This is a test to find embedded images and headers. We prefer to
       // summarize with a normal paragraph over a header or an embedded object,
       // if possible.
       $has_embed = preg_match('/^[{=]/', $block);
 
       if ($has_space && !$has_embed) {
         // This seems like a good summary, so return it.
         return $block;
       }
 
       if (!$best) {
         // This is the first block we found; if everything is garbage just
         // use the first block.
         $best = $block;
       }
     }
 
     return $best;
   }
 
   private static function loadCustomInlineRules() {
     return id(new PhutilClassMapQuery())
       ->setAncestorClass('PhabricatorRemarkupCustomInlineRule')
       ->execute();
   }
 
   private static function loadCustomBlockRules() {
     return id(new PhutilClassMapQuery())
       ->setAncestorClass('PhabricatorRemarkupCustomBlockRule')
       ->execute();
   }
 
+  public static function digestRemarkupContent($object, $content) {
+    $parts = array();
+    $parts[] = get_class($object);
+
+    if ($object instanceof PhabricatorLiskDAO) {
+      $parts[] = $object->getID();
+    }
+
+    $parts[] = $content;
+
+    $message = implode("\n", $parts);
+
+    return PhabricatorHash::digestWithNamedKey($message, 'remarkup');
+  }
+
 }