diff --git a/resources/sql/autopatches/20160721.pack.04.pkg.sql b/resources/sql/autopatches/20160721.pack.04.pkg.sql
new file mode 100644
--- /dev/null
+++ b/resources/sql/autopatches/20160721.pack.04.pkg.sql
@@ -0,0 +1,13 @@
+CREATE TABLE {$NAMESPACE}_packages.packages_package (
+  id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+  phid VARBINARY(64) NOT NULL,
+  name VARCHAR(64) NOT NULL COLLATE {$COLLATE_TEXT},
+  publisherPHID VARBINARY(64) NOT NULL,
+  packageKey VARCHAR(64) NOT NULL COLLATE {$COLLATE_SORT},
+  viewPolicy VARBINARY(64) NOT NULL,
+  editPolicy VARBINARY(64) NOT NULL,
+  dateCreated INT UNSIGNED NOT NULL,
+  dateModified INT UNSIGNED NOT NULL,
+  UNIQUE KEY `key_phid` (phid),
+  UNIQUE KEY `key_package` (publisherPHID, packageKey)
+) ENGINE=InnoDB, COLLATE {$COLLATE_TEXT};
diff --git a/resources/sql/autopatches/20160721.pack.05.pkgxaction.sql b/resources/sql/autopatches/20160721.pack.05.pkgxaction.sql
new file mode 100644
--- /dev/null
+++ b/resources/sql/autopatches/20160721.pack.05.pkgxaction.sql
@@ -0,0 +1,19 @@
+CREATE TABLE {$NAMESPACE}_packages.packages_packagetransaction (
+  id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+  phid VARBINARY(64) NOT NULL,
+  authorPHID VARBINARY(64) NOT NULL,
+  objectPHID VARBINARY(64) NOT NULL,
+  viewPolicy VARBINARY(64) NOT NULL,
+  editPolicy VARBINARY(64) NOT NULL,
+  commentPHID VARBINARY(64) DEFAULT NULL,
+  commentVersion INT UNSIGNED NOT NULL,
+  transactionType VARCHAR(32) COLLATE {$COLLATE_TEXT} NOT NULL,
+  oldValue LONGTEXT COLLATE {$COLLATE_TEXT} NOT NULL,
+  newValue LONGTEXT COLLATE {$COLLATE_TEXT} NOT NULL,
+  contentSource LONGTEXT COLLATE {$COLLATE_TEXT} NOT NULL,
+  metadata LONGTEXT COLLATE {$COLLATE_TEXT} NOT NULL,
+  dateCreated INT UNSIGNED NOT NULL,
+  dateModified INT UNSIGNED NOT NULL,
+  UNIQUE KEY `key_phid` (`phid`),
+  KEY `key_object` (`objectPHID`)
+) ENGINE=InnoDB, COLLATE {$COLLATE_TEXT};
diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -2977,8 +2977,27 @@
     'PhabricatorPackagesDAO' => 'applications/packages/storage/PhabricatorPackagesDAO.php',
     'PhabricatorPackagesEditEngine' => 'applications/packages/editor/PhabricatorPackagesEditEngine.php',
     'PhabricatorPackagesEditor' => 'applications/packages/editor/PhabricatorPackagesEditor.php',
+    'PhabricatorPackagesPackage' => 'applications/packages/storage/PhabricatorPackagesPackage.php',
+    'PhabricatorPackagesPackageController' => 'applications/packages/controller/PhabricatorPackagesPackageController.php',
+    'PhabricatorPackagesPackageEditConduitAPIMethod' => 'applications/packages/conduit/PhabricatorPackagesPackageEditConduitAPIMethod.php',
+    'PhabricatorPackagesPackageEditController' => 'applications/packages/controller/PhabricatorPackagesPackageEditController.php',
+    'PhabricatorPackagesPackageEditEngine' => 'applications/packages/editor/PhabricatorPackagesPackageEditEngine.php',
+    'PhabricatorPackagesPackageEditor' => 'applications/packages/editor/PhabricatorPackagesPackageEditor.php',
+    'PhabricatorPackagesPackageKeyTransaction' => 'applications/packages/xaction/package/PhabricatorPackagesPackageKeyTransaction.php',
+    'PhabricatorPackagesPackageListController' => 'applications/packages/controller/PhabricatorPackagesPackageListController.php',
+    'PhabricatorPackagesPackageNameTransaction' => 'applications/packages/xaction/package/PhabricatorPackagesPackageNameTransaction.php',
+    'PhabricatorPackagesPackagePHIDType' => 'applications/packages/phid/PhabricatorPackagesPackagePHIDType.php',
+    'PhabricatorPackagesPackagePublisherTransaction' => 'applications/packages/xaction/package/PhabricatorPackagesPackagePublisherTransaction.php',
+    'PhabricatorPackagesPackageQuery' => 'applications/packages/query/PhabricatorPackagesPackageQuery.php',
+    'PhabricatorPackagesPackageSearchConduitAPIMethod' => 'applications/packages/conduit/PhabricatorPackagesPackageSearchConduitAPIMethod.php',
+    'PhabricatorPackagesPackageSearchEngine' => 'applications/packages/query/PhabricatorPackagesPackageSearchEngine.php',
+    'PhabricatorPackagesPackageTransaction' => 'applications/packages/storage/PhabricatorPackagesPackageTransaction.php',
+    'PhabricatorPackagesPackageTransactionQuery' => 'applications/packages/query/PhabricatorPackagesPackageTransactionQuery.php',
+    'PhabricatorPackagesPackageTransactionType' => 'applications/packages/xaction/package/PhabricatorPackagesPackageTransactionType.php',
+    'PhabricatorPackagesPackageViewController' => 'applications/packages/controller/PhabricatorPackagesPackageViewController.php',
     'PhabricatorPackagesPublisher' => 'applications/packages/storage/PhabricatorPackagesPublisher.php',
     'PhabricatorPackagesPublisherController' => 'applications/packages/controller/PhabricatorPackagesPublisherController.php',
+    'PhabricatorPackagesPublisherDatasource' => 'applications/packages/typeahead/PhabricatorPackagesPublisherDatasource.php',
     'PhabricatorPackagesPublisherEditConduitAPIMethod' => 'applications/packages/conduit/PhabricatorPackagesPublisherEditConduitAPIMethod.php',
     'PhabricatorPackagesPublisherEditController' => 'applications/packages/controller/PhabricatorPackagesPublisherEditController.php',
     'PhabricatorPackagesPublisherEditEngine' => 'applications/packages/editor/PhabricatorPackagesPublisherEditEngine.php',
@@ -2994,6 +3013,7 @@
     'PhabricatorPackagesPublisherTransactionQuery' => 'applications/packages/query/PhabricatorPackagesPublisherTransactionQuery.php',
     'PhabricatorPackagesPublisherTransactionType' => 'applications/packages/xaction/publisher/PhabricatorPackagesPublisherTransactionType.php',
     'PhabricatorPackagesPublisherViewController' => 'applications/packages/controller/PhabricatorPackagesPublisherViewController.php',
+    'PhabricatorPackagesQuery' => 'applications/packages/query/PhabricatorPackagesQuery.php',
     'PhabricatorPackagesSchemaSpec' => 'applications/packages/storage/PhabricatorPackagesSchemaSpec.php',
     'PhabricatorPackagesTransactionType' => 'applications/packages/xaction/PhabricatorPackagesTransactionType.php',
     'PhabricatorPagerUIExample' => 'applications/uiexample/examples/PhabricatorPagerUIExample.php',
@@ -7754,6 +7774,32 @@
     'PhabricatorPackagesDAO' => 'PhabricatorLiskDAO',
     'PhabricatorPackagesEditEngine' => 'PhabricatorEditEngine',
     'PhabricatorPackagesEditor' => 'PhabricatorApplicationTransactionEditor',
+    'PhabricatorPackagesPackage' => array(
+      'PhabricatorPackagesDAO',
+      'PhabricatorPolicyInterface',
+      'PhabricatorApplicationTransactionInterface',
+      'PhabricatorDestructibleInterface',
+      'PhabricatorSubscribableInterface',
+      'PhabricatorProjectInterface',
+      'PhabricatorConduitResultInterface',
+    ),
+    'PhabricatorPackagesPackageController' => 'PhabricatorPackagesController',
+    'PhabricatorPackagesPackageEditConduitAPIMethod' => 'PhabricatorEditEngineAPIMethod',
+    'PhabricatorPackagesPackageEditController' => 'PhabricatorPackagesPackageController',
+    'PhabricatorPackagesPackageEditEngine' => 'PhabricatorPackagesEditEngine',
+    'PhabricatorPackagesPackageEditor' => 'PhabricatorPackagesEditor',
+    'PhabricatorPackagesPackageKeyTransaction' => 'PhabricatorPackagesPackageTransactionType',
+    'PhabricatorPackagesPackageListController' => 'PhabricatorPackagesPackageController',
+    'PhabricatorPackagesPackageNameTransaction' => 'PhabricatorPackagesPackageTransactionType',
+    'PhabricatorPackagesPackagePHIDType' => 'PhabricatorPHIDType',
+    'PhabricatorPackagesPackagePublisherTransaction' => 'PhabricatorPackagesPackageTransactionType',
+    'PhabricatorPackagesPackageQuery' => 'PhabricatorPackagesQuery',
+    'PhabricatorPackagesPackageSearchConduitAPIMethod' => 'PhabricatorSearchEngineAPIMethod',
+    'PhabricatorPackagesPackageSearchEngine' => 'PhabricatorApplicationSearchEngine',
+    'PhabricatorPackagesPackageTransaction' => 'PhabricatorModularTransaction',
+    'PhabricatorPackagesPackageTransactionQuery' => 'PhabricatorApplicationTransactionQuery',
+    'PhabricatorPackagesPackageTransactionType' => 'PhabricatorPackagesTransactionType',
+    'PhabricatorPackagesPackageViewController' => 'PhabricatorPackagesPackageController',
     'PhabricatorPackagesPublisher' => array(
       'PhabricatorPackagesDAO',
       'PhabricatorPolicyInterface',
@@ -7764,6 +7810,7 @@
       'PhabricatorConduitResultInterface',
     ),
     'PhabricatorPackagesPublisherController' => 'PhabricatorPackagesController',
+    'PhabricatorPackagesPublisherDatasource' => 'PhabricatorTypeaheadDatasource',
     'PhabricatorPackagesPublisherEditConduitAPIMethod' => 'PhabricatorEditEngineAPIMethod',
     'PhabricatorPackagesPublisherEditController' => 'PhabricatorPackagesPublisherController',
     'PhabricatorPackagesPublisherEditEngine' => 'PhabricatorPackagesEditEngine',
@@ -7772,13 +7819,14 @@
     'PhabricatorPackagesPublisherListController' => 'PhabricatorPackagesPublisherController',
     'PhabricatorPackagesPublisherNameTransaction' => 'PhabricatorPackagesPublisherTransactionType',
     'PhabricatorPackagesPublisherPHIDType' => 'PhabricatorPHIDType',
-    'PhabricatorPackagesPublisherQuery' => 'PhabricatorCursorPagedPolicyAwareQuery',
+    'PhabricatorPackagesPublisherQuery' => 'PhabricatorPackagesQuery',
     'PhabricatorPackagesPublisherSearchConduitAPIMethod' => 'PhabricatorSearchEngineAPIMethod',
     'PhabricatorPackagesPublisherSearchEngine' => 'PhabricatorApplicationSearchEngine',
     'PhabricatorPackagesPublisherTransaction' => 'PhabricatorModularTransaction',
     'PhabricatorPackagesPublisherTransactionQuery' => 'PhabricatorApplicationTransactionQuery',
     'PhabricatorPackagesPublisherTransactionType' => 'PhabricatorPackagesTransactionType',
     'PhabricatorPackagesPublisherViewController' => 'PhabricatorPackagesPublisherController',
+    'PhabricatorPackagesQuery' => 'PhabricatorCursorPagedPolicyAwareQuery',
     'PhabricatorPackagesSchemaSpec' => 'PhabricatorConfigSchemaSpec',
     'PhabricatorPackagesTransactionType' => 'PhabricatorModularTransactionType',
     'PhabricatorPagerUIExample' => 'PhabricatorUIExample',
diff --git a/src/applications/packages/application/PhabricatorPackagesApplication.php b/src/applications/packages/application/PhabricatorPackagesApplication.php
--- a/src/applications/packages/application/PhabricatorPackagesApplication.php
+++ b/src/applications/packages/application/PhabricatorPackagesApplication.php
@@ -31,6 +31,9 @@
       '/package/' => array(
         '(?P<publisherKey>[^/]+)/' => array(
           '' => 'PhabricatorPackagesPublisherViewController',
+          '(?P<packageKey>[^/]+)/' => array(
+            '' => 'PhabricatorPackagesPackageViewController',
+          ),
         ),
       ),
       '/packages/' => array(
@@ -40,6 +43,12 @@
           $this->getEditRoutePattern('edit/') =>
             'PhabricatorPackagesPublisherEditController',
         ),
+        'package/' => array(
+          $this->getQueryRoutePattern() =>
+            'PhabricatorPackagesPackageListController',
+          $this->getEditRoutePattern('edit/') =>
+            'PhabricatorPackagesPackageEditController',
+        ),
       ),
     );
   }
diff --git a/src/applications/packages/conduit/PhabricatorPackagesPackageEditConduitAPIMethod.php b/src/applications/packages/conduit/PhabricatorPackagesPackageEditConduitAPIMethod.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/conduit/PhabricatorPackagesPackageEditConduitAPIMethod.php
@@ -0,0 +1,19 @@
+<?php
+
+final class PhabricatorPackagesPackageEditConduitAPIMethod
+  extends PhabricatorEditEngineAPIMethod {
+
+  public function getAPIMethodName() {
+    return 'packages.package.edit';
+  }
+
+  public function newEditEngine() {
+    return new PhabricatorPackagesPackageEditEngine();
+  }
+
+  public function getMethodSummary() {
+    return pht(
+      'Apply transactions to create a new package or edit an existing one.');
+  }
+
+}
diff --git a/src/applications/packages/conduit/PhabricatorPackagesPackageSearchConduitAPIMethod.php b/src/applications/packages/conduit/PhabricatorPackagesPackageSearchConduitAPIMethod.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/conduit/PhabricatorPackagesPackageSearchConduitAPIMethod.php
@@ -0,0 +1,18 @@
+<?php
+
+final class PhabricatorPackagesPackageSearchConduitAPIMethod
+  extends PhabricatorSearchEngineAPIMethod {
+
+  public function getAPIMethodName() {
+    return 'packages.package.search';
+  }
+
+  public function newSearchEngine() {
+    return new PhabricatorPackagesPackageSearchEngine();
+  }
+
+  public function getMethodSummary() {
+    return pht('Read information about packages.');
+  }
+
+}
diff --git a/src/applications/packages/controller/PhabricatorPackagesPackageController.php b/src/applications/packages/controller/PhabricatorPackagesPackageController.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/controller/PhabricatorPackagesPackageController.php
@@ -0,0 +1,4 @@
+<?php
+
+abstract class PhabricatorPackagesPackageController
+  extends PhabricatorPackagesController {}
diff --git a/src/applications/packages/controller/PhabricatorPackagesPackageEditController.php b/src/applications/packages/controller/PhabricatorPackagesPackageEditController.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/controller/PhabricatorPackagesPackageEditController.php
@@ -0,0 +1,12 @@
+<?php
+
+final class PhabricatorPackagesPackageEditController
+  extends PhabricatorPackagesPackageController {
+
+  public function handleRequest(AphrontRequest $request) {
+    return id(new PhabricatorPackagesPackageEditEngine())
+      ->setController($this)
+      ->buildResponse();
+  }
+
+}
diff --git a/src/applications/packages/controller/PhabricatorPackagesPackageListController.php b/src/applications/packages/controller/PhabricatorPackagesPackageListController.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/controller/PhabricatorPackagesPackageListController.php
@@ -0,0 +1,26 @@
+<?php
+
+final class PhabricatorPackagesPackageListController
+  extends PhabricatorPackagesPackageController {
+
+  public function shouldAllowPublic() {
+    return true;
+  }
+
+  public function handleRequest(AphrontRequest $request) {
+    return id(new PhabricatorPackagesPackageSearchEngine())
+      ->setController($this)
+      ->buildResponse();
+  }
+
+  protected function buildApplicationCrumbs() {
+    $crumbs = parent::buildApplicationCrumbs();
+
+    id(new PhabricatorPackagesPackageEditEngine())
+      ->setViewer($this->getViewer())
+      ->addActionToCrumbs($crumbs);
+
+    return $crumbs;
+  }
+
+}
diff --git a/src/applications/packages/controller/PhabricatorPackagesPackageViewController.php b/src/applications/packages/controller/PhabricatorPackagesPackageViewController.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/controller/PhabricatorPackagesPackageViewController.php
@@ -0,0 +1,87 @@
+<?php
+
+final class PhabricatorPackagesPackageViewController
+  extends PhabricatorPackagesPackageController {
+
+  public function shouldAllowPublic() {
+    return true;
+  }
+
+  public function handleRequest(AphrontRequest $request) {
+    $viewer = $request->getViewer();
+
+    $publisher_key = $request->getURIData('publisherKey');
+    $package_key = $request->getURIData('packageKey');
+    $full_key = $publisher_key.'/'.$package_key;
+
+    $package = id(new PhabricatorPackagesPackageQuery())
+      ->setViewer($viewer)
+      ->withFullKeys(array($full_key))
+      ->executeOne();
+    if (!$package) {
+      return new Aphront404Response();
+    }
+
+    $publisher = $package->getPublisher();
+
+    $crumbs = $this->buildApplicationCrumbs()
+      ->addTextCrumb($publisher->getName(), $publisher->getURI())
+      ->addTextCrumb($package->getName())
+      ->setBorder(true);
+
+    $header = $this->buildHeaderView($package);
+    $curtain = $this->buildCurtain($package);
+
+    $timeline = $this->buildTransactionTimeline(
+      $package,
+      new PhabricatorPackagesPackageTransactionQuery());
+
+    $package_view = id(new PHUITwoColumnView())
+      ->setHeader($header)
+      ->setCurtain($curtain)
+      ->setMainColumn($timeline);
+
+    return $this->newPage()
+      ->setCrumbs($crumbs)
+      ->setPageObjectPHIDs(
+        array(
+          $package->getPHID(),
+        ))
+      ->appendChild($package_view);
+  }
+
+
+  private function buildHeaderView(PhabricatorPackagesPackage $package) {
+    $viewer = $this->getViewer();
+    $name = $package->getName();
+
+    return id(new PHUIHeaderView())
+      ->setViewer($viewer)
+      ->setHeader($name)
+      ->setPolicyObject($package)
+      ->setHeaderIcon('fa-gift');
+  }
+
+  private function buildCurtain(PhabricatorPackagesPackage $package) {
+    $viewer = $this->getViewer();
+    $curtain = $this->newCurtainView($package);
+
+    $can_edit = PhabricatorPolicyFilter::hasCapability(
+      $viewer,
+      $package,
+      PhabricatorPolicyCapability::CAN_EDIT);
+
+    $id = $package->getID();
+    $edit_uri = $this->getApplicationURI("package/edit/{$id}/");
+
+    $curtain->addAction(
+      id(new PhabricatorActionView())
+        ->setName(pht('Edit Package'))
+        ->setIcon('fa-pencil')
+        ->setDisabled(!$can_edit)
+        ->setHref($edit_uri));
+
+    return $curtain;
+  }
+
+}
diff --git a/src/applications/packages/editor/PhabricatorPackagesPackageEditEngine.php b/src/applications/packages/editor/PhabricatorPackagesPackageEditEngine.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/editor/PhabricatorPackagesPackageEditEngine.php
@@ -0,0 +1,104 @@
+<?php
+
+final class PhabricatorPackagesPackageEditEngine
+  extends PhabricatorPackagesEditEngine {
+
+  const ENGINECONST = 'packages.package';
+
+  public function getEngineName() {
+    return pht('Package Packages');
+  }
+
+  public function getSummaryHeader() {
+    return pht('Edit Package Package Configurations');
+  }
+
+  public function getSummaryText() {
+    return pht('This engine is used to edit Packages packages.');
+  }
+
+  protected function newEditableObject() {
+    $viewer = $this->getViewer();
+    return PhabricatorPackagesPackage::initializeNewPackage($viewer);
+  }
+
+  protected function newObjectQuery() {
+    return new PhabricatorPackagesPackageQuery();
+  }
+
+  protected function getObjectCreateTitleText($object) {
+    return pht('Create Package');
+  }
+
+  protected function getObjectCreateButtonText($object) {
+    return pht('Create Package');
+  }
+
+  protected function getObjectEditTitleText($object) {
+    return pht('Edit Package: %s', $object->getName());
+  }
+
+  protected function getObjectEditShortText($object) {
+    return pht('Edit Package');
+  }
+
+  protected function getObjectCreateShortText() {
+    return pht('Create Package');
+  }
+
+  protected function getObjectName() {
+    return pht('Package');
+  }
+
+  protected function getEditorURI() {
+    return '/packages/package/edit/';
+  }
+
+  protected function getObjectCreateCancelURI($object) {
+    return '/packages/package/';
+  }
+
+  protected function getObjectViewURI($object) {
+    return $object->getURI();
+  }
+
+  protected function buildCustomEditFields($object) {
+    $fields = array();
+
+    if ($this->getIsCreate()) {
+      $fields[] = id(new PhabricatorDatasourceEditField())
+        ->setKey('publisher')
+        ->setAliases(array('publisherPHID'))
+        ->setLabel(pht('Publisher'))
+        ->setDescription(pht('Publisher for this package.'))
+        ->setTransactionType(
+          PhabricatorPackagesPackagePublisherTransaction::TRANSACTIONTYPE)
+        ->setIsRequired(true)
+        ->setDatasource(new PhabricatorPackagesPublisherDatasource())
+        ->setSingleValue($object->getPublisherPHID());
+    }
+
+    $fields[] = id(new PhabricatorTextEditField())
+      ->setKey('name')
+      ->setLabel(pht('Name'))
+      ->setDescription(pht('Name of the package.'))
+      ->setTransactionType(
+        PhabricatorPackagesPackageNameTransaction::TRANSACTIONTYPE)
+      ->setIsRequired(true)
+      ->setValue($object->getName());
+
+    if ($this->getIsCreate()) {
+      $fields[] = id(new PhabricatorTextEditField())
+        ->setKey('packageKey')
+        ->setLabel(pht('Package Key'))
+        ->setDescription(pht('Unique key to identify the package.'))
+        ->setTransactionType(
+          PhabricatorPackagesPackageKeyTransaction::TRANSACTIONTYPE)
+        ->setIsRequired(true)
+        ->setValue($object->getPackageKey());
+    }
+
+    return $fields;
+  }
+
+}
diff --git a/src/applications/packages/editor/PhabricatorPackagesPackageEditor.php b/src/applications/packages/editor/PhabricatorPackagesPackageEditor.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/editor/PhabricatorPackagesPackageEditor.php
@@ -0,0 +1,55 @@
+<?php
+
+final class PhabricatorPackagesPackageEditor
+  extends PhabricatorPackagesEditor {
+
+  public function getEditorObjectsDescription() {
+    return pht('Package Packages');
+  }
+
+  public function getCreateObjectTitle($author, $object) {
+    return pht('%s created this package.', $author);
+  }
+
+  public function getCreateObjectTitleForFeed($author, $object) {
+    return pht('%s created %s.', $author, $object);
+  }
+
+  public function getTransactionTypes() {
+    $types = parent::getTransactionTypes();
+
+    $types[] = PhabricatorTransactions::TYPE_VIEW_POLICY;
+    $types[] = PhabricatorTransactions::TYPE_EDIT_POLICY;
+
+    return $types;
+  }
+
+  protected function shouldPublishFeedStory(
+    PhabricatorLiskDAO $object,
+    array $xactions) {
+    return true;
+  }
+
+  protected function getMailTo(PhabricatorLiskDAO $object) {
+    return array();
+  }
+
+  protected function didCatchDuplicateKeyException(
+    PhabricatorLiskDAO $object,
+    array $xactions,
+    Exception $ex) {
+
+    $errors = array();
+    $errors[] = new PhabricatorApplicationTransactionValidationError(
+      PhabricatorPackagesPackageKeyTransaction::TRANSACTIONTYPE,
+      pht('Duplicate'),
+      pht(
+        'The package key "%s" is already in use by another package provided '.
+        'by this publisher.',
+        $object->getPackageKey()),
+      null);
+
+    throw new PhabricatorApplicationTransactionValidationException($errors);
+  }
+
+}
diff --git a/src/applications/packages/editor/PhabricatorPackagesPublisherEditEngine.php b/src/applications/packages/editor/PhabricatorPackagesPublisherEditEngine.php
--- a/src/applications/packages/editor/PhabricatorPackagesPublisherEditEngine.php
+++ b/src/applications/packages/editor/PhabricatorPackagesPublisherEditEngine.php
@@ -76,13 +76,13 @@
 
     if ($this->getIsCreate()) {
       $fields[] = id(new PhabricatorTextEditField())
-      ->setKey('publisherKey')
-      ->setLabel(pht('Publisher Key'))
-      ->setDescription(pht('Unique key to identify the publisher.'))
-      ->setTransactionType(
-        PhabricatorPackagesPublisherKeyTransaction::TRANSACTIONTYPE)
-      ->setIsRequired(true)
-      ->setValue($object->getPublisherKey());
+        ->setKey('publisherKey')
+        ->setLabel(pht('Publisher Key'))
+        ->setDescription(pht('Unique key to identify the publisher.'))
+        ->setTransactionType(
+          PhabricatorPackagesPublisherKeyTransaction::TRANSACTIONTYPE)
+        ->setIsRequired(true)
+        ->setValue($object->getPublisherKey());
     }
 
     return $fields;
diff --git a/src/applications/packages/phid/PhabricatorPackagesPackagePHIDType.php b/src/applications/packages/phid/PhabricatorPackagesPackagePHIDType.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/phid/PhabricatorPackagesPackagePHIDType.php
@@ -0,0 +1,45 @@
+<?php
+
+final class PhabricatorPackagesPackagePHIDType
+  extends PhabricatorPHIDType {
+
+  const TYPECONST = 'PPAK';
+
+  public function getTypeName() {
+    return pht('Package');
+  }
+
+  public function newObject() {
+    return new PhabricatorPackagesPackage();
+  }
+
+  public function getPHIDTypeApplicationClass() {
+    return 'PhabricatorPackagesApplication';
+  }
+
+  protected function buildQueryForObjects(
+    PhabricatorObjectQuery $query,
+    array $phids) {
+
+    return id(new PhabricatorPackagesPackageQuery())
+      ->withPHIDs($phids);
+  }
+
+  public function loadHandles(
+    PhabricatorHandleQuery $query,
+    array $handles,
+    array $objects) {
+
+    foreach ($handles as $phid => $handle) {
+      $package = $objects[$phid];
+
+      $name = $package->getName();
+      $uri = $package->getURI();
+
+      $handle
+        ->setName($name)
+        ->setURI($uri);
+    }
+  }
+
+}
diff --git a/src/applications/packages/query/PhabricatorPackagesPackageQuery.php b/src/applications/packages/query/PhabricatorPackagesPackageQuery.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/query/PhabricatorPackagesPackageQuery.php
@@ -0,0 +1,152 @@
+<?php
+
+final class PhabricatorPackagesPackageQuery
+  extends PhabricatorPackagesQuery {
+
+  private $ids;
+  private $phids;
+  private $publisherPHIDs;
+  private $packageKeys;
+  private $fullKeys;
+
+  public function withIDs(array $ids) {
+    $this->ids = $ids;
+    return $this;
+  }
+
+  public function withPHIDs(array $phids) {
+    $this->phids = $phids;
+    return $this;
+  }
+
+  public function withPublisherPHIDs(array $phids) {
+    $this->publisherPHIDs = $phids;
+    return $this;
+  }
+
+  public function withPackageKeys(array $keys) {
+    $this->packageKeys = $keys;
+    return $this;
+  }
+
+  public function withFullKeys(array $keys) {
+    $this->fullKeys = $keys;
+    return $this;
+  }
+
+  public function newResultObject() {
+    return new PhabricatorPackagesPackage();
+  }
+
+  protected function loadPage() {
+    return $this->loadStandardPage($this->newResultObject());
+  }
+
+  protected function buildWhereClauseParts(AphrontDatabaseConnection $conn) {
+    $where = parent::buildWhereClauseParts($conn);
+
+    if ($this->ids !== null) {
+      $where[] = qsprintf(
+        $conn,
+        'p.id IN (%Ld)',
+        $this->ids);
+    }
+
+    if ($this->phids !== null) {
+      $where[] = qsprintf(
+        $conn,
+        'p.phid IN (%Ls)',
+        $this->phids);
+    }
+
+    if ($this->publisherPHIDs !== null) {
+      $where[] = qsprintf(
+        $conn,
+        'p.phid IN (%Ls)',
+        $this->publisherPHIDs);
+    }
+
+    if ($this->packageKeys !== null) {
+      $where[] = qsprintf(
+        $conn,
+        'p.packageKey IN (%Ls)',
+        $this->packageKeys);
+    }
+
+    if ($this->fullKeys !== null) {
+      $parts = array();
+      foreach ($this->fullKeys as $full_key) {
+        $key_parts = explode('/', $full_key, 2);
+
+        if (count($key_parts) != 2) {
+          continue;
+        }
+
+        $parts[] = qsprintf(
+          $conn,
+          '(u.publisherKey = %s AND p.packageKey = %s)',
+          $key_parts[0],
+          $key_parts[1]);
+      }
+
+      // If none of the full keys we were provided were valid, we don't
+      // match any results.
+      if (!$parts) {
+        throw new PhabricatorEmptyQueryException();
+      }
+
+      $where[] = qsprintf(
+        $conn,
+        '%Q',
+        implode(' OR ', $parts));
+    }
+
+    return $where;
+  }
+
+  protected function buildJoinClauseParts(AphrontDatabaseConnection $conn) {
+    $joins = parent::buildJoinClauseParts($conn);
+
+    $join_publisher = ($this->fullKeys !== null);
+    if ($join_publisher) {
+      $publisher_table = new PhabricatorPackagesPublisher();
+
+      $joins[] = qsprintf(
+        $conn,
+        'JOIN %T u ON u.phid = p.publisherPHID',
+        $publisher_table->getTableName());
+    }
+
+    return $joins;
+  }
+
+  protected function willFilterPage(array $packages) {
+    $publisher_phids = mpull($packages, 'getPublisherPHID');
+
+    $publishers = id(new PhabricatorPackagesPublisherQuery())
+      ->setViewer($this->getViewer())
+      ->setParentQuery($this)
+      ->withPHIDs($publisher_phids)
+      ->execute();
+    $publishers = mpull($publishers, null, 'getPHID');
+
+    foreach ($packages as $key => $package) {
+      $publisher = idx($publishers, $package->getPublisherPHID());
+
+      if (!$publisher) {
+        unset($packages[$key]);
+        $this->didRejectResult($package);
+        continue;
+      }
+
+      $package->attachPublisher($publisher);
+    }
+
+    return $packages;
+  }
+
+  protected function getPrimaryTableAlias() {
+    return 'p';
+  }
+
+}
diff --git a/src/applications/packages/query/PhabricatorPackagesPackageSearchEngine.php b/src/applications/packages/query/PhabricatorPackagesPackageSearchEngine.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/query/PhabricatorPackagesPackageSearchEngine.php
@@ -0,0 +1,77 @@
+<?php
+
+final class PhabricatorPackagesPackageSearchEngine
+  extends PhabricatorApplicationSearchEngine {
+
+  public function getResultTypeDescription() {
+    return pht('Packages');
+  }
+
+  public function getApplicationClassName() {
+    return 'PhabricatorPackagesApplication';
+  }
+
+  public function newQuery() {
+    return id(new PhabricatorPackagesPackageQuery());
+  }
+
+  protected function buildQueryFromParameters(array $map) {
+    $query = $this->newQuery();
+
+    return $query;
+  }
+
+  protected function buildCustomSearchFields() {
+    return array();
+  }
+
+  protected function getURI($path) {
+    return '/packages/package/'.$path;
+  }
+
+  protected function getBuiltinQueryNames() {
+    $names = array(
+      'all' => pht('All Packages'),
+    );
+
+    return $names;
+  }
+
+  public function buildSavedQueryFromBuiltin($query_key) {
+    $query = $this->newSavedQuery();
+    $query->setQueryKey($query_key);
+
+    switch ($query_key) {
+      case 'all':
+        return $query;
+    }
+
+    return parent::buildSavedQueryFromBuiltin($query_key);
+  }
+
+  protected function renderResultList(
+    array $packages,
+    PhabricatorSavedQuery $query,
+    array $handles) {
+
+    assert_instances_of($packages, 'PhabricatorPackagesPackage');
+
+    $viewer = $this->requireViewer();
+
+    $list = id(new PHUIObjectItemListView())
+      ->setViewer($viewer);
+    foreach ($packages as $package) {
+      $item = id(new PHUIObjectItemView())
+        ->setObjectName($package->getFullKey())
+        ->setHeader($package->getName())
+        ->setHref($package->getURI());
+
+      $list->addItem($item);
+    }
+
+    return id(new PhabricatorApplicationSearchResultView())
+      ->setObjectList($list)
+      ->setNoDataString(pht('No packages found.'));
+  }
+
+}
diff --git a/src/applications/packages/query/PhabricatorPackagesPackageTransactionQuery.php b/src/applications/packages/query/PhabricatorPackagesPackageTransactionQuery.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/query/PhabricatorPackagesPackageTransactionQuery.php
@@ -0,0 +1,10 @@
+<?php
+
+final class PhabricatorPackagesPackageTransactionQuery
+  extends PhabricatorApplicationTransactionQuery {
+
+  public function getTemplateApplicationTransaction() {
+    return new PhabricatorPackagesPackageTransaction();
+  }
+
+}
diff --git a/src/applications/packages/query/PhabricatorPackagesPublisherQuery.php b/src/applications/packages/query/PhabricatorPackagesPublisherQuery.php
--- a/src/applications/packages/query/PhabricatorPackagesPublisherQuery.php
+++ b/src/applications/packages/query/PhabricatorPackagesPublisherQuery.php
@@ -1,7 +1,7 @@
 <?php
 
 final class PhabricatorPackagesPublisherQuery
-  extends PhabricatorCursorPagedPolicyAwareQuery {
+  extends PhabricatorPackagesQuery {
 
   private $ids;
   private $phids;
@@ -57,8 +57,4 @@
     return $where;
   }
 
-  public function getQueryApplicationClass() {
-    return 'PhabricatorPackagesApplication';
-  }
-
 }
diff --git a/src/applications/packages/query/PhabricatorPackagesQuery.php b/src/applications/packages/query/PhabricatorPackagesQuery.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/query/PhabricatorPackagesQuery.php
@@ -0,0 +1,10 @@
+<?php
+
+abstract class PhabricatorPackagesQuery
+  extends PhabricatorCursorPagedPolicyAwareQuery {
+
+  public function getQueryApplicationClass() {
+    return 'PhabricatorPackagesApplication';
+  }
+
+}
diff --git a/src/applications/packages/storage/PhabricatorPackagesPublisher.php b/src/applications/packages/storage/PhabricatorPackagesPackage.php
copy from src/applications/packages/storage/PhabricatorPackagesPublisher.php
copy to src/applications/packages/storage/PhabricatorPackagesPackage.php
--- a/src/applications/packages/storage/PhabricatorPackagesPublisher.php
+++ b/src/applications/packages/storage/PhabricatorPackagesPackage.php
@@ -1,6 +1,6 @@
 <?php
 
-final class PhabricatorPackagesPublisher
+final class PhabricatorPackagesPackage
   extends PhabricatorPackagesDAO
   implements
     PhabricatorPolicyInterface,
@@ -11,10 +11,14 @@
     PhabricatorConduitResultInterface {
 
   protected $name;
-  protected $publisherKey;
+  protected $publisherPHID;
+  protected $packageKey;
+  protected $viewPolicy;
   protected $editPolicy;
 
-  public static function initializeNewPublisher(PhabricatorUser $actor) {
+  private $publisher = self::ATTACHABLE;
+
+  public static function initializeNewPackage(PhabricatorUser $actor) {
     return id(new self());
   }
 
@@ -23,11 +27,11 @@
       self::CONFIG_AUX_PHID => true,
       self::CONFIG_COLUMN_SCHEMA => array(
         'name' => 'text64',
-        'publisherKey' => 'sort64',
+        'packageKey' => 'sort64',
       ),
       self::CONFIG_KEY_SCHEMA => array(
-        'key_publisher' => array(
-          'columns' => array('publisherKey'),
+        'key_package' => array(
+          'columns' => array('publisherPHID', 'packageKey'),
           'unique' => true,
         ),
       ),
@@ -36,20 +40,36 @@
 
   public function generatePHID() {
     return PhabricatorPHID::generateNewPHID(
-      PhabricatorPackagesPublisherPHIDType::TYPECONST);
+      PhabricatorPackagesPackagePHIDType::TYPECONST);
   }
 
   public function getURI() {
-    $publisher_key = $this->getPublisherKey();
-    return "/package/{$publisher_key}/";
+    $full_key = $this->getFullKey();
+    return "/package/{$full_key}/";
+  }
+
+  public function getFullKey() {
+    $publisher = $this->getPublisher();
+    $publisher_key = $publisher->getPublisherKey();
+    $package_key = $this->getPackageKey();
+    return "{$publisher_key}/{$package_key}";
+  }
+
+  public function attachPublisher(PhabricatorPackagesPublisher $publisher) {
+    $this->publisher = $publisher;
+    return $this;
   }
 
-  public static function assertValidPublisherName($value) {
+  public function getPublisher() {
+    return $this->assertAttached($this->publisher);
+  }
+
+  public static function assertValidPackageName($value) {
     $length = phutil_utf8_strlen($value);
     if (!$length) {
       throw new Exception(
         pht(
-          'Publisher name "%s" is not valid: publisher names are required.',
+          'Package name "%s" is not valid: package names are required.',
           $value));
     }
 
@@ -57,19 +77,19 @@
     if ($length > $max_length) {
       throw new Exception(
         pht(
-          'Publisher name "%s" is not valid: publisher names must not be '.
+          'Package name "%s" is not valid: package names must not be '.
           'more than %s characters long.',
           $value,
           new PhutilNumber($max_length)));
     }
   }
 
-  public static function assertValidPublisherKey($value) {
+  public static function assertValidPackageKey($value) {
     $length = phutil_utf8_strlen($value);
     if (!$length) {
       throw new Exception(
         pht(
-          'Publisher key "%s" is not valid: publisher keys are required.',
+          'Package key "%s" is not valid: package keys are required.',
           $value));
     }
 
@@ -77,7 +97,7 @@
     if ($length > $max_length) {
       throw new Exception(
         pht(
-          'Publisher key "%s" is not valid: publisher keys must not be '.
+          'Package key "%s" is not valid: package keys must not be '.
           'more than %s characters long.',
           $value,
           new PhutilNumber($max_length)));
@@ -86,7 +106,7 @@
     if (!preg_match('/^[a-z]+\z/', $value)) {
       throw new Exception(
         pht(
-          'Publisher key "%s" is not valid: publisher keys may only contain '.
+          'Package key "%s" is not valid: package keys may only contain '.
           'lowercase latin letters.',
           $value));
     }
@@ -114,7 +134,7 @@
   public function getPolicy($capability) {
     switch ($capability) {
       case PhabricatorPolicyCapability::CAN_VIEW:
-        return PhabricatorPolicies::getMostOpenPolicy();
+        return $this->getViewPolicy();
       case PhabricatorPolicyCapability::CAN_EDIT:
         return $this->getEditPolicy();
     }
@@ -142,7 +162,7 @@
 
 
   public function getApplicationTransactionEditor() {
-    return new PhabricatorPackagesPublisherEditor();
+    return new PhabricatorPackagesPackageEditor();
   }
 
   public function getApplicationTransactionObject() {
@@ -150,7 +170,7 @@
   }
 
   public function getApplicationTransactionTemplate() {
-    return new PhabricatorPackagesPublisherTransaction();
+    return new PhabricatorPackagesPackageTransaction();
   }
 
   public function willRenderTimeline(
@@ -168,18 +188,29 @@
       id(new PhabricatorConduitSearchFieldSpecification())
         ->setKey('name')
         ->setType('string')
-        ->setDescription(pht('The name of the publisher.')),
+        ->setDescription(pht('The name of the package.')),
       id(new PhabricatorConduitSearchFieldSpecification())
-        ->setKey('publisherKey')
+        ->setKey('packageKey')
         ->setType('string')
-        ->setDescription(pht('The unique key of the publisher.')),
+        ->setDescription(pht('The unique key of the package.')),
     );
   }
 
   public function getFieldValuesForConduit() {
+    $publisher = $this->getPublisher();
+
+    $publisher_map = array(
+      'id' => (int)$publisher->getID(),
+      'phid' => $publisher->getPHID(),
+      'name' => $publisher->getName(),
+      'publisherKey' => $publisher->getPublisherKey(),
+    );
+
     return array(
       'name' => $this->getName(),
-      'publisherKey' => $this->getPublisherKey(),
+      'packageKey' => $this->getPackageKey(),
+      'fullKey' => $this->getFullKey(),
+      'publisher' => $publisher_map,
     );
   }
 
diff --git a/src/applications/packages/storage/PhabricatorPackagesPackageTransaction.php b/src/applications/packages/storage/PhabricatorPackagesPackageTransaction.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/storage/PhabricatorPackagesPackageTransaction.php
@@ -0,0 +1,18 @@
+<?php
+
+final class PhabricatorPackagesPackageTransaction
+  extends PhabricatorModularTransaction {
+
+  public function getApplicationName() {
+    return 'packages';
+  }
+
+  public function getApplicationTransactionType() {
+    return PhabricatorPackagesPackagePHIDType::TYPECONST;
+  }
+
+  public function getBaseTransactionClass() {
+    return 'PhabricatorPackagesPackageTransactionType';
+  }
+
+}
diff --git a/src/applications/packages/storage/PhabricatorPackagesPublisher.php b/src/applications/packages/storage/PhabricatorPackagesPublisher.php
--- a/src/applications/packages/storage/PhabricatorPackagesPublisher.php
+++ b/src/applications/packages/storage/PhabricatorPackagesPublisher.php
@@ -134,7 +134,21 @@
 
   public function destroyObjectPermanently(
     PhabricatorDestructionEngine $engine) {
-    $this->delete();
+    $viewer = $engine->getViewer();
+
+    $this->openTransaction();
+
+      $packages = id(new PhabricatorPackagesPackageQuery())
+        ->setViewer($viewer)
+        ->withPublisherPHIDs(array($this->getPHID()))
+        ->execute();
+      foreach ($packages as $package) {
+        $engine->destroyObject($package);
+      }
+
+      $this->delete();
+
+    $this->saveTransaction();
   }
 
 
diff --git a/src/applications/packages/typeahead/PhabricatorPackagesPublisherDatasource.php b/src/applications/packages/typeahead/PhabricatorPackagesPublisherDatasource.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/typeahead/PhabricatorPackagesPublisherDatasource.php
@@ -0,0 +1,35 @@
+<?php
+
+final class PhabricatorPackagesPublisherDatasource
+  extends PhabricatorTypeaheadDatasource {
+
+  public function getBrowseTitle() {
+    return pht('Browse Package Publishers');
+  }
+
+  public function getPlaceholderText() {
+    return pht('Type a publisher name...');
+  }
+
+  public function getDatasourceApplicationClass() {
+    return 'PhabricatorPackagesApplication';
+  }
+
+  public function loadResults() {
+    $viewer = $this->getViewer();
+    $raw_query = $this->getRawQuery();
+
+    $publisher_query = id(new PhabricatorPackagesPublisherQuery());
+    $publishers = $this->executeQuery($publisher_query);
+
+    $results = array();
+    foreach ($publishers as $publisher) {
+      $results[] = id(new PhabricatorTypeaheadResult())
+        ->setName($publisher->getName())
+        ->setPHID($publisher->getPHID());
+    }
+
+    return $this->filterResultsAgainstTokens($results);
+  }
+
+}
diff --git a/src/applications/packages/xaction/package/PhabricatorPackagesPackageKeyTransaction.php b/src/applications/packages/xaction/package/PhabricatorPackagesPackageKeyTransaction.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/xaction/package/PhabricatorPackagesPackageKeyTransaction.php
@@ -0,0 +1,47 @@
+<?php
+
+final class PhabricatorPackagesPackageKeyTransaction
+  extends PhabricatorPackagesPackageTransactionType {
+
+  const TRANSACTIONTYPE = 'packages.package.key';
+
+  public function generateOldValue($object) {
+    return $object->getPackageKey();
+  }
+
+  public function applyInternalEffects($object, $value) {
+    $object->setPackageKey($value);
+  }
+
+  public function validateTransactions($object, array $xactions) {
+    $errors = array();
+
+    if ($this->isEmptyTextTransaction($object->getName(), $xactions)) {
+      $errors[] = $this->newRequiredError(
+        pht(
+          'Each package provided by a publisher must have a '.
+          'unique package key.'));
+      return $errors;
+    }
+
+    if (!$this->isNewObject()) {
+      foreach ($xactions as $xaction) {
+        $errors[] = $this->newInvalidError(
+          pht('Once a package is created, its key can not be changed.'),
+          $xaction);
+      }
+    }
+
+    foreach ($xactions as $xaction) {
+      $value = $xaction->getNewValue();
+      try {
+        PhabricatorPackagesPackage::assertValidPackageKey($value);
+      } catch (Exception $ex) {
+        $errors[] = $this->newInvalidError($ex->getMessage(), $xaction);
+      }
+    }
+
+    return $errors;
+  }
+
+}
diff --git a/src/applications/packages/xaction/package/PhabricatorPackagesPackageNameTransaction.php b/src/applications/packages/xaction/package/PhabricatorPackagesPackageNameTransaction.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/xaction/package/PhabricatorPackagesPackageNameTransaction.php
@@ -0,0 +1,54 @@
+<?php
+
+final class PhabricatorPackagesPackageNameTransaction
+  extends PhabricatorPackagesPackageTransactionType {
+
+  const TRANSACTIONTYPE = 'packages.package.name';
+
+  public function generateOldValue($object) {
+    return $object->getName();
+  }
+
+  public function applyInternalEffects($object, $value) {
+    $object->setName($value);
+  }
+
+  public function getTitle() {
+    return pht(
+      '%s changed the name of this package from %s to %s.',
+      $this->renderAuthor(),
+      $this->renderOldValue(),
+      $this->renderNewValue());
+  }
+
+  public function getTitleForFeed() {
+    return pht(
+      '%s updated the name for %s from %s to %s.',
+      $this->renderAuthor(),
+      $this->renderObject(),
+      $this->renderOldValue(),
+      $this->renderNewValue());
+  }
+
+  public function validateTransactions($object, array $xactions) {
+    $errors = array();
+
+    if ($this->isEmptyTextTransaction($object->getName(), $xactions)) {
+      $errors[] = $this->newRequiredError(
+        pht('Packages must have a name.'));
+      return $errors;
+    }
+
+    foreach ($xactions as $xaction) {
+      $value = $xaction->getNewValue();
+      try {
+        PhabricatorPackagesPackage::assertValidPackageName($value);
+      } catch (Exception $ex) {
+        $errors[] = $this->newInvalidError($ex->getMessage(), $xaction);
+      }
+    }
+
+    return $errors;
+  }
+
+}
diff --git a/src/applications/packages/xaction/package/PhabricatorPackagesPackagePublisherTransaction.php b/src/applications/packages/xaction/package/PhabricatorPackagesPackagePublisherTransaction.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/xaction/package/PhabricatorPackagesPackagePublisherTransaction.php
@@ -0,0 +1,66 @@
+<?php
+
+final class PhabricatorPackagesPackagePublisherTransaction
+  extends PhabricatorPackagesPackageTransactionType {
+
+  const TRANSACTIONTYPE = 'packages.package.publisher';
+
+  public function generateOldValue($object) {
+    return $object->getPublisherPHID();
+  }
+
+  public function applyInternalEffects($object, $value) {
+    $object->setPublisherPHID($value);
+  }
+
+  public function validateTransactions($object, array $xactions) {
+    $errors = array();
+
+    if ($this->isEmptyTextTransaction($object->getName(), $xactions)) {
+      $errors[] = $this->newRequiredError(
+        pht(
+          'You must select a publisher when creating a package.'));
+      return $errors;
+    }
+
+    if (!$this->isNewObject()) {
+      foreach ($xactions as $xaction) {
+        $errors[] = $this->newInvalidError(
+          pht('Once a package is created, its publisher can not be changed.'),
+          $xaction);
+      }
+    }
+
+    $viewer = $this->getActor();
+    foreach ($xactions as $xaction) {
+      $publisher_phid = $xaction->getNewValue();
+
+      $publisher = id(new PhabricatorPackagesPublisherQuery())
+        ->setViewer($viewer)
+        ->withPHIDs(array($publisher_phid))
+        ->setRaisePolicyExceptions(false)
+        ->requireCapabilities(
+          array(
+            PhabricatorPolicyCapability::CAN_VIEW,
+            PhabricatorPolicyCapability::CAN_EDIT,
+          ))
+        ->executeOne();
+
+      if (!$publisher) {
+        $errors[] = $this->newInvalidError(
+          pht(
+            'Publisher "%s" is invalid: the publisher must exist and you '.
+            'must have permission to edit it in order to create a new '.
+            'package.',
+            $publisher_phid),
+          $xaction);
+        continue;
+      }
+
+      $object->attachPublisher($publisher);
+    }
+
+    return $errors;
+  }
+
+}
diff --git a/src/applications/packages/xaction/package/PhabricatorPackagesPackageTransactionType.php b/src/applications/packages/xaction/package/PhabricatorPackagesPackageTransactionType.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/xaction/package/PhabricatorPackagesPackageTransactionType.php
@@ -0,0 +1,4 @@
+<?php
+
+abstract class PhabricatorPackagesPackageTransactionType
+  extends PhabricatorPackagesTransactionType {}