diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
index 11be8a50f0..35be621604 100644
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -1004,6 +1004,7 @@ phutil_register_library_map(array(
     'DrydockBlueprintCustomField' => 'applications/drydock/customfield/DrydockBlueprintCustomField.php',
     'DrydockBlueprintDatasource' => 'applications/drydock/typeahead/DrydockBlueprintDatasource.php',
     'DrydockBlueprintDisableController' => 'applications/drydock/controller/DrydockBlueprintDisableController.php',
+    'DrydockBlueprintEditConduitAPIMethod' => 'applications/drydock/conduit/DrydockBlueprintEditConduitAPIMethod.php',
     'DrydockBlueprintEditController' => 'applications/drydock/controller/DrydockBlueprintEditController.php',
     'DrydockBlueprintEditEngine' => 'applications/drydock/editor/DrydockBlueprintEditEngine.php',
     'DrydockBlueprintEditor' => 'applications/drydock/editor/DrydockBlueprintEditor.php',
@@ -6090,6 +6091,7 @@ phutil_register_library_map(array(
     'DrydockBlueprintCustomField' => 'PhabricatorCustomField',
     'DrydockBlueprintDatasource' => 'PhabricatorTypeaheadDatasource',
     'DrydockBlueprintDisableController' => 'DrydockBlueprintController',
+    'DrydockBlueprintEditConduitAPIMethod' => 'PhabricatorEditEngineAPIMethod',
     'DrydockBlueprintEditController' => 'DrydockBlueprintController',
     'DrydockBlueprintEditEngine' => 'PhabricatorEditEngine',
     'DrydockBlueprintEditor' => 'PhabricatorApplicationTransactionEditor',
diff --git a/src/applications/differential/editor/DifferentialTransactionEditor.php b/src/applications/differential/editor/DifferentialTransactionEditor.php
index ae652ba0ec..b2fc179002 100644
--- a/src/applications/differential/editor/DifferentialTransactionEditor.php
+++ b/src/applications/differential/editor/DifferentialTransactionEditor.php
@@ -1588,11 +1588,8 @@ final class DifferentialTransactionEditor
           ->setAuthorPHID($author_phid)
           ->setTransactionType(
             DifferentialRevisionRequestReviewTransaction::TRANSACTIONTYPE)
-          ->setOldValue(false)
           ->setNewValue(true);
 
-        $xaction = $this->populateTransaction($object, $xaction);
-
         // If we're creating this revision and immediately moving it out of
         // the draft state, mark this as a create transaction so it gets
         // hidden in the timeline and mail, since it isn't interesting: it
@@ -1601,15 +1598,10 @@ final class DifferentialTransactionEditor
           $xaction->setIsCreateTransaction(true);
         }
 
-        $object->openTransaction();
-          $object
-            ->setStatus(DifferentialRevisionStatus::NEEDS_REVIEW)
-            ->save();
-
-          $xaction->save();
-        $object->saveTransaction();
-
-        $xactions[] = $xaction;
+        // Queue this transaction and apply it separately after the current
+        // batch of transactions finishes so that Herald can fire on the new
+        // revision state. See T13027 for discussion.
+        $this->queueTransaction($xaction);
       }
     }
 
diff --git a/src/applications/differential/xaction/DifferentialRevisionRequestReviewTransaction.php b/src/applications/differential/xaction/DifferentialRevisionRequestReviewTransaction.php
index 465b5234d5..ed0d20a0b6 100644
--- a/src/applications/differential/xaction/DifferentialRevisionRequestReviewTransaction.php
+++ b/src/applications/differential/xaction/DifferentialRevisionRequestReviewTransaction.php
@@ -57,11 +57,15 @@ final class DifferentialRevisionRequestReviewTransaction
           'revisions.'));
     }
 
-    if (!$this->isViewerRevisionAuthor($object, $viewer)) {
-      throw new Exception(
-        pht(
-          'You can not request review of this revision because you are not '.
-          'the author of the revision.'));
+    // When revisions automatically promote out of "Draft" after builds finish,
+    // the viewer may be acting as the Harbormaster application.
+    if (!$viewer->isOmnipotent()) {
+      if (!$this->isViewerRevisionAuthor($object, $viewer)) {
+        throw new Exception(
+          pht(
+            'You can not request review of this revision because you are not '.
+            'the author of the revision.'));
+      }
     }
   }
 
diff --git a/src/applications/diffusion/controller/DiffusionCommitController.php b/src/applications/diffusion/controller/DiffusionCommitController.php
index cdce8702ca..11463ef97d 100644
--- a/src/applications/diffusion/controller/DiffusionCommitController.php
+++ b/src/applications/diffusion/controller/DiffusionCommitController.php
@@ -39,20 +39,23 @@ final class DiffusionCommitController extends DiffusionController {
       return $this->buildRawDiffResponse($drequest);
     }
 
-    $commit = id(new DiffusionCommitQuery())
+    $commits = id(new DiffusionCommitQuery())
       ->setViewer($viewer)
       ->withRepository($repository)
       ->withIdentifiers(array($commit_identifier))
       ->needCommitData(true)
       ->needAuditRequests(true)
-      ->executeOne();
+      ->setLimit(100)
+      ->execute();
+
+    $multiple_results = count($commits) > 1;
 
     $crumbs = $this->buildCrumbs(array(
-      'commit' => true,
+      'commit' => !$multiple_results,
     ));
     $crumbs->setBorder(true);
 
-    if (!$commit) {
+    if (!$commits) {
       if (!$this->getCommitExists()) {
         return new Aphront404Response();
       }
@@ -70,7 +73,40 @@ final class DiffusionCommitController extends DiffusionController {
         ->setTitle($title)
         ->setCrumbs($crumbs)
         ->appendChild($error);
+    } else if ($multiple_results) {
 
+      $warning_message =
+        pht(
+          'The identifier %s is ambiguous and matches more than one commit.',
+          phutil_tag(
+            'strong',
+            array(),
+            $commit_identifier));
+
+      $error = id(new PHUIInfoView())
+        ->setTitle(pht('Ambiguous Commit'))
+        ->setSeverity(PHUIInfoView::SEVERITY_WARNING)
+        ->appendChild($warning_message);
+
+      $list = id(new DiffusionCommitListView())
+        ->setViewer($viewer)
+        ->setCommits($commits)
+        ->setNoDataString(pht('No recent commits.'));
+
+      $crumbs->addTextCrumb(pht('Ambiguous Commit'));
+
+      $matched_commits = id(new PHUITwoColumnView())
+        ->setFooter(array(
+          $error,
+          $list,
+        ));
+
+      return $this->newPage()
+        ->setTitle(pht('Ambiguous Commit'))
+        ->setCrumbs($crumbs)
+        ->appendChild($matched_commits);
+    } else {
+      $commit = head($commits);
     }
 
     $audit_requests = $commit->getAudits();
diff --git a/src/applications/drydock/conduit/DrydockBlueprintEditConduitAPIMethod.php b/src/applications/drydock/conduit/DrydockBlueprintEditConduitAPIMethod.php
new file mode 100644
index 0000000000..764c077d87
--- /dev/null
+++ b/src/applications/drydock/conduit/DrydockBlueprintEditConduitAPIMethod.php
@@ -0,0 +1,20 @@
+<?php
+
+final class DrydockBlueprintEditConduitAPIMethod
+  extends PhabricatorEditEngineAPIMethod {
+
+  public function getAPIMethodName() {
+    return 'drydock.blueprint.edit';
+  }
+
+  public function newEditEngine() {
+    return new DrydockBlueprintEditEngine();
+  }
+
+  public function getMethodSummary() {
+    return pht(
+      'WARNING: Apply transactions to edit an existing blueprint. This method '.
+      'can not create new blueprints.');
+  }
+
+}
diff --git a/src/applications/drydock/editor/DrydockBlueprintEditEngine.php b/src/applications/drydock/editor/DrydockBlueprintEditEngine.php
index 06117272a9..020fe7514c 100644
--- a/src/applications/drydock/editor/DrydockBlueprintEditEngine.php
+++ b/src/applications/drydock/editor/DrydockBlueprintEditEngine.php
@@ -51,6 +51,17 @@ final class DrydockBlueprintEditEngine
     return $blueprint;
   }
 
+  protected function newEditableObjectForDocumentation() {
+    // In order to generate the proper list of fields/transactions for a
+    // blueprint, a blueprint's type needs to be known upfront, and there's
+    // currently no way to pre-specify the type. Hardcoding an implementation
+    // here prevents the fatal on the Conduit API page and allows transactions
+    // to be edited.
+    $impl = new DrydockWorkingCopyBlueprintImplementation();
+    $this->setBlueprintImplementation($impl);
+    return $this->newEditableObject();
+  }
+
   protected function newObjectQuery() {
     return new DrydockBlueprintQuery();
   }
diff --git a/src/applications/transactions/editengine/PhabricatorEditEngine.php b/src/applications/transactions/editengine/PhabricatorEditEngine.php
index 6c9cb5e201..8ba49f4d77 100644
--- a/src/applications/transactions/editengine/PhabricatorEditEngine.php
+++ b/src/applications/transactions/editengine/PhabricatorEditEngine.php
@@ -630,6 +630,15 @@ abstract class PhabricatorEditEngine
     return $this->isCreate;
   }
 
+  /**
+   * Initialize a new object for documentation creation.
+   *
+   * @return object Newly initialized object.
+   * @task load
+   */
+  protected function newEditableObjectForDocumentation() {
+    return $this->newEditableObject();
+  }
 
   /**
    * Flag this workflow as a create or edit.
@@ -2198,7 +2207,7 @@ abstract class PhabricatorEditEngine
       return array();
     }
 
-    $object = $this->newEditableObject();
+    $object = $this->newEditableObjectForDocumentation();
     $fields = $this->buildEditFields($object);
     return $this->getConduitEditTypesFromFields($fields);
   }
diff --git a/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php b/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
index 175a5775ee..8e6d816769 100644
--- a/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
+++ b/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
@@ -70,6 +70,8 @@ abstract class PhabricatorApplicationTransactionEditor
   private $feedRelatedPHIDs = array();
   private $modularTypes;
 
+  private $transactionQueue = array();
+
   const STORAGE_ENCODING_BINARY = 'binary';
 
   /**
@@ -1174,6 +1176,8 @@ abstract class PhabricatorApplicationTransactionEditor
         'priority' => PhabricatorWorker::PRIORITY_ALERTS,
       ));
 
+    $this->flushTransactionQueue($object);
+
     return $xactions;
   }
 
@@ -3864,4 +3868,39 @@ abstract class PhabricatorApplicationTransactionEditor
     return pht('%s created an object: %s.', $author, $object);
   }
 
+/* -(  Queue  )-------------------------------------------------------------- */
+
+  protected function queueTransaction(
+    PhabricatorApplicationTransaction $xaction) {
+    $this->transactionQueue[] = $xaction;
+    return $this;
+  }
+
+  private function flushTransactionQueue($object) {
+    if (!$this->transactionQueue) {
+      return;
+    }
+
+    $xactions = $this->transactionQueue;
+    $this->transactionQueue = array();
+
+    $editor = $this->newQueueEditor();
+
+    return $editor->applyTransactions($object, $xactions);
+  }
+
+  private function newQueueEditor() {
+    $editor = id(newv(get_class($this), array()))
+      ->setActor($this->getActor())
+      ->setContentSource($this->getContentSource())
+      ->setContinueOnNoEffect($this->getContinueOnNoEffect())
+      ->setContinueOnMissingFields($this->getContinueOnMissingFields());
+
+    if ($this->actingAsPHID !== null) {
+      $editor->setActingAsPHID($this->actingAsPHID);
+    }
+
+    return $editor;
+  }
+
 }