diff --git a/resources/sql/autopatches/20160721.pack.01.pub.sql b/resources/sql/autopatches/20160721.pack.01.pub.sql
new file mode 100644
--- /dev/null
+++ b/resources/sql/autopatches/20160721.pack.01.pub.sql
@@ -0,0 +1,11 @@
+CREATE TABLE {$NAMESPACE}_packages.packages_publisher (
+  id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+  phid VARBINARY(64) NOT NULL,
+  name VARCHAR(64) NOT NULL COLLATE {$COLLATE_TEXT},
+  publisherKey VARCHAR(64) NOT NULL COLLATE {$COLLATE_SORT},
+  editPolicy VARBINARY(64) NOT NULL,
+  dateCreated INT UNSIGNED NOT NULL,
+  dateModified INT UNSIGNED NOT NULL,
+  UNIQUE KEY `key_phid` (phid),
+  UNIQUE KEY `key_publisher` (publisherKey)
+) ENGINE=InnoDB, COLLATE {$COLLATE_TEXT};
diff --git a/resources/sql/autopatches/20160721.pack.02.pubxaction.sql b/resources/sql/autopatches/20160721.pack.02.pubxaction.sql
new file mode 100644
--- /dev/null
+++ b/resources/sql/autopatches/20160721.pack.02.pubxaction.sql
@@ -0,0 +1,19 @@
+CREATE TABLE {$NAMESPACE}_packages.packages_publishertransaction (
+  id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+  phid VARBINARY(64) NOT NULL,
+  authorPHID VARBINARY(64) NOT NULL,
+  objectPHID VARBINARY(64) NOT NULL,
+  viewPolicy VARBINARY(64) NOT NULL,
+  editPolicy VARBINARY(64) NOT NULL,
+  commentPHID VARBINARY(64) DEFAULT NULL,
+  commentVersion INT UNSIGNED NOT NULL,
+  transactionType VARCHAR(32) COLLATE {$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 {$COLLATE_TEXT};
diff --git a/resources/sql/autopatches/20160721.pack.03.edge.sql b/resources/sql/autopatches/20160721.pack.03.edge.sql
new file mode 100644
--- /dev/null
+++ b/resources/sql/autopatches/20160721.pack.03.edge.sql
@@ -0,0 +1,16 @@
+CREATE TABLE {$NAMESPACE}_packages.edge (
+  src VARBINARY(64) NOT NULL,
+  type INT UNSIGNED NOT NULL,
+  dst VARBINARY(64) NOT NULL,
+  dateCreated INT UNSIGNED NOT NULL,
+  seq INT UNSIGNED NOT NULL,
+  dataID INT UNSIGNED,
+  PRIMARY KEY (src, type, dst),
+  KEY `src` (src, type, dateCreated, seq),
+  UNIQUE KEY `key_dst` (dst, type, src)
+) ENGINE=InnoDB, COLLATE {$COLLATE_TEXT};
+
+CREATE TABLE {$NAMESPACE}_packages.edgedata (
+  id INT UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
+  data LONGTEXT NOT NULL COLLATE {$COLLATE_TEXT}
+) ENGINE=InnoDB, COLLATE {$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
@@ -2972,6 +2972,30 @@
     'PhabricatorPHPASTApplication' => 'applications/phpast/application/PhabricatorPHPASTApplication.php',
     'PhabricatorPHPConfigSetupCheck' => 'applications/config/check/PhabricatorPHPConfigSetupCheck.php',
     'PhabricatorPHPMailerConfigOptions' => 'applications/config/option/PhabricatorPHPMailerConfigOptions.php',
+    'PhabricatorPackagesApplication' => 'applications/packages/application/PhabricatorPackagesApplication.php',
+    'PhabricatorPackagesController' => 'applications/packages/controller/PhabricatorPackagesController.php',
+    'PhabricatorPackagesDAO' => 'applications/packages/storage/PhabricatorPackagesDAO.php',
+    'PhabricatorPackagesEditEngine' => 'applications/packages/editor/PhabricatorPackagesEditEngine.php',
+    'PhabricatorPackagesEditor' => 'applications/packages/editor/PhabricatorPackagesEditor.php',
+    'PhabricatorPackagesPublisher' => 'applications/packages/storage/PhabricatorPackagesPublisher.php',
+    'PhabricatorPackagesPublisherController' => 'applications/packages/controller/PhabricatorPackagesPublisherController.php',
+    'PhabricatorPackagesPublisherEditConduitAPIMethod' => 'applications/packages/conduit/PhabricatorPackagesPublisherEditConduitAPIMethod.php',
+    'PhabricatorPackagesPublisherEditController' => 'applications/packages/controller/PhabricatorPackagesPublisherEditController.php',
+    'PhabricatorPackagesPublisherEditEngine' => 'applications/packages/editor/PhabricatorPackagesPublisherEditEngine.php',
+    'PhabricatorPackagesPublisherEditor' => 'applications/packages/editor/PhabricatorPackagesPublisherEditor.php',
+    'PhabricatorPackagesPublisherKeyTransaction' => 'applications/packages/xaction/publisher/PhabricatorPackagesPublisherKeyTransaction.php',
+    'PhabricatorPackagesPublisherListController' => 'applications/packages/controller/PhabricatorPackagesPublisherListController.php',
+    'PhabricatorPackagesPublisherNameTransaction' => 'applications/packages/xaction/publisher/PhabricatorPackagesPublisherNameTransaction.php',
+    'PhabricatorPackagesPublisherPHIDType' => 'applications/packages/phid/PhabricatorPackagesPublisherPHIDType.php',
+    'PhabricatorPackagesPublisherQuery' => 'applications/packages/query/PhabricatorPackagesPublisherQuery.php',
+    'PhabricatorPackagesPublisherSearchConduitAPIMethod' => 'applications/packages/conduit/PhabricatorPackagesPublisherSearchConduitAPIMethod.php',
+    'PhabricatorPackagesPublisherSearchEngine' => 'applications/packages/query/PhabricatorPackagesPublisherSearchEngine.php',
+    'PhabricatorPackagesPublisherTransaction' => 'applications/packages/storage/PhabricatorPackagesPublisherTransaction.php',
+    'PhabricatorPackagesPublisherTransactionQuery' => 'applications/packages/query/PhabricatorPackagesPublisherTransactionQuery.php',
+    'PhabricatorPackagesPublisherTransactionType' => 'applications/packages/xaction/publisher/PhabricatorPackagesPublisherTransactionType.php',
+    'PhabricatorPackagesPublisherViewController' => 'applications/packages/controller/PhabricatorPackagesPublisherViewController.php',
+    'PhabricatorPackagesSchemaSpec' => 'applications/packages/storage/PhabricatorPackagesSchemaSpec.php',
+    'PhabricatorPackagesTransactionType' => 'applications/packages/xaction/PhabricatorPackagesTransactionType.php',
     'PhabricatorPagerUIExample' => 'applications/uiexample/examples/PhabricatorPagerUIExample.php',
     'PhabricatorPassphraseApplication' => 'applications/passphrase/application/PhabricatorPassphraseApplication.php',
     'PhabricatorPasswordAuthProvider' => 'applications/auth/provider/PhabricatorPasswordAuthProvider.php',
@@ -7725,6 +7749,38 @@
     'PhabricatorPHPASTApplication' => 'PhabricatorApplication',
     'PhabricatorPHPConfigSetupCheck' => 'PhabricatorSetupCheck',
     'PhabricatorPHPMailerConfigOptions' => 'PhabricatorApplicationConfigOptions',
+    'PhabricatorPackagesApplication' => 'PhabricatorApplication',
+    'PhabricatorPackagesController' => 'PhabricatorController',
+    'PhabricatorPackagesDAO' => 'PhabricatorLiskDAO',
+    'PhabricatorPackagesEditEngine' => 'PhabricatorEditEngine',
+    'PhabricatorPackagesEditor' => 'PhabricatorApplicationTransactionEditor',
+    'PhabricatorPackagesPublisher' => array(
+      'PhabricatorPackagesDAO',
+      'PhabricatorPolicyInterface',
+      'PhabricatorApplicationTransactionInterface',
+      'PhabricatorDestructibleInterface',
+      'PhabricatorSubscribableInterface',
+      'PhabricatorProjectInterface',
+      'PhabricatorConduitResultInterface',
+    ),
+    'PhabricatorPackagesPublisherController' => 'PhabricatorPackagesController',
+    'PhabricatorPackagesPublisherEditConduitAPIMethod' => 'PhabricatorEditEngineAPIMethod',
+    'PhabricatorPackagesPublisherEditController' => 'PhabricatorPackagesPublisherController',
+    'PhabricatorPackagesPublisherEditEngine' => 'PhabricatorPackagesEditEngine',
+    'PhabricatorPackagesPublisherEditor' => 'PhabricatorPackagesEditor',
+    'PhabricatorPackagesPublisherKeyTransaction' => 'PhabricatorPackagesPublisherTransactionType',
+    'PhabricatorPackagesPublisherListController' => 'PhabricatorPackagesPublisherController',
+    'PhabricatorPackagesPublisherNameTransaction' => 'PhabricatorPackagesPublisherTransactionType',
+    'PhabricatorPackagesPublisherPHIDType' => 'PhabricatorPHIDType',
+    'PhabricatorPackagesPublisherQuery' => 'PhabricatorCursorPagedPolicyAwareQuery',
+    'PhabricatorPackagesPublisherSearchConduitAPIMethod' => 'PhabricatorSearchEngineAPIMethod',
+    'PhabricatorPackagesPublisherSearchEngine' => 'PhabricatorApplicationSearchEngine',
+    'PhabricatorPackagesPublisherTransaction' => 'PhabricatorModularTransaction',
+    'PhabricatorPackagesPublisherTransactionQuery' => 'PhabricatorApplicationTransactionQuery',
+    'PhabricatorPackagesPublisherTransactionType' => 'PhabricatorPackagesTransactionType',
+    'PhabricatorPackagesPublisherViewController' => 'PhabricatorPackagesPublisherController',
+    'PhabricatorPackagesSchemaSpec' => 'PhabricatorConfigSchemaSpec',
+    'PhabricatorPackagesTransactionType' => 'PhabricatorModularTransactionType',
     'PhabricatorPagerUIExample' => 'PhabricatorUIExample',
     'PhabricatorPassphraseApplication' => 'PhabricatorApplication',
     'PhabricatorPasswordAuthProvider' => 'PhabricatorAuthProvider',
diff --git a/src/applications/packages/application/PhabricatorPackagesApplication.php b/src/applications/packages/application/PhabricatorPackagesApplication.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/application/PhabricatorPackagesApplication.php
@@ -0,0 +1,47 @@
+<?php
+
+final class PhabricatorPackagesApplication extends PhabricatorApplication {
+
+  public function getName() {
+    return pht('Packages');
+  }
+
+  public function getShortDescription() {
+    return pht('Publish Software');
+  }
+
+  public function getFlavorText() {
+    return pht('Applications and Extensions');
+  }
+
+  public function getBaseURI() {
+    return '/packages/';
+  }
+
+  public function getIcon() {
+    return 'fa-gift';
+  }
+
+  public function isPrototype() {
+    return true;
+  }
+
+  public function getRoutes() {
+    return array(
+      '/package/' => array(
+        '(?P<publisherKey>[^/]+)/' => array(
+          '' => 'PhabricatorPackagesPublisherViewController',
+        ),
+      ),
+      '/packages/' => array(
+        'publisher/' => array(
+          $this->getQueryRoutePattern() =>
+            'PhabricatorPackagesPublisherListController',
+          $this->getEditRoutePattern('edit/') =>
+            'PhabricatorPackagesPublisherEditController',
+        ),
+      ),
+    );
+  }
+
+}
diff --git a/src/applications/packages/conduit/PhabricatorPackagesPublisherEditConduitAPIMethod.php b/src/applications/packages/conduit/PhabricatorPackagesPublisherEditConduitAPIMethod.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/conduit/PhabricatorPackagesPublisherEditConduitAPIMethod.php
@@ -0,0 +1,19 @@
+<?php
+
+final class PhabricatorPackagesPublisherEditConduitAPIMethod
+  extends PhabricatorEditEngineAPIMethod {
+
+  public function getAPIMethodName() {
+    return 'packages.publisher.edit';
+  }
+
+  public function newEditEngine() {
+    return new PhabricatorPackagesPublisherEditEngine();
+  }
+
+  public function getMethodSummary() {
+    return pht(
+      'Apply transactions to create a new publisher or edit an existing one.');
+  }
+
+}
diff --git a/src/applications/packages/conduit/PhabricatorPackagesPublisherSearchConduitAPIMethod.php b/src/applications/packages/conduit/PhabricatorPackagesPublisherSearchConduitAPIMethod.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/conduit/PhabricatorPackagesPublisherSearchConduitAPIMethod.php
@@ -0,0 +1,18 @@
+<?php
+
+final class PhabricatorPackagesPublisherSearchConduitAPIMethod
+  extends PhabricatorSearchEngineAPIMethod {
+
+  public function getAPIMethodName() {
+    return 'packages.publisher.search';
+  }
+
+  public function newSearchEngine() {
+    return new PhabricatorPackagesPublisherSearchEngine();
+  }
+
+  public function getMethodSummary() {
+    return pht('Read information about publishers.');
+  }
+
+}
diff --git a/src/applications/packages/controller/PhabricatorPackagesController.php b/src/applications/packages/controller/PhabricatorPackagesController.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/controller/PhabricatorPackagesController.php
@@ -0,0 +1,3 @@
+<?php
+
+abstract class PhabricatorPackagesController extends PhabricatorController {}
diff --git a/src/applications/packages/controller/PhabricatorPackagesPublisherController.php b/src/applications/packages/controller/PhabricatorPackagesPublisherController.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/controller/PhabricatorPackagesPublisherController.php
@@ -0,0 +1,4 @@
+<?php
+
+abstract class PhabricatorPackagesPublisherController
+  extends PhabricatorPackagesController {}
diff --git a/src/applications/packages/controller/PhabricatorPackagesPublisherEditController.php b/src/applications/packages/controller/PhabricatorPackagesPublisherEditController.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/controller/PhabricatorPackagesPublisherEditController.php
@@ -0,0 +1,12 @@
+<?php
+
+final class PhabricatorPackagesPublisherEditController
+  extends PhabricatorPackagesPublisherController {
+
+  public function handleRequest(AphrontRequest $request) {
+    return id(new PhabricatorPackagesPublisherEditEngine())
+      ->setController($this)
+      ->buildResponse();
+  }
+
+}
diff --git a/src/applications/packages/controller/PhabricatorPackagesPublisherListController.php b/src/applications/packages/controller/PhabricatorPackagesPublisherListController.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/controller/PhabricatorPackagesPublisherListController.php
@@ -0,0 +1,26 @@
+<?php
+
+final class PhabricatorPackagesPublisherListController
+  extends PhabricatorPackagesPublisherController {
+
+  public function shouldAllowPublic() {
+    return true;
+  }
+
+  public function handleRequest(AphrontRequest $request) {
+    return id(new PhabricatorPackagesPublisherSearchEngine())
+      ->setController($this)
+      ->buildResponse();
+  }
+
+  protected function buildApplicationCrumbs() {
+    $crumbs = parent::buildApplicationCrumbs();
+
+    id(new PhabricatorPackagesPublisherEditEngine())
+      ->setViewer($this->getViewer())
+      ->addActionToCrumbs($crumbs);
+
+    return $crumbs;
+  }
+
+}
diff --git a/src/applications/packages/controller/PhabricatorPackagesPublisherViewController.php b/src/applications/packages/controller/PhabricatorPackagesPublisherViewController.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/controller/PhabricatorPackagesPublisherViewController.php
@@ -0,0 +1,84 @@
+<?php
+
+final class PhabricatorPackagesPublisherViewController
+  extends PhabricatorPackagesPublisherController {
+
+  public function shouldAllowPublic() {
+    return true;
+  }
+
+  public function handleRequest(AphrontRequest $request) {
+    $viewer = $request->getViewer();
+    $publisher_key = $request->getURIData('publisherKey');
+
+    $publisher = id(new PhabricatorPackagesPublisherQuery())
+      ->setViewer($viewer)
+      ->withPublisherKeys(array($publisher_key))
+      ->executeOne();
+    if (!$publisher) {
+      return new Aphront404Response();
+    }
+
+    $crumbs = $this->buildApplicationCrumbs()
+      ->addTextCrumb(
+        pht('Publishers'),
+        $this->getApplicationURI('publisher/'))
+      ->addTextCrumb($publisher->getName())
+      ->setBorder(true);
+
+    $header = $this->buildHeaderView($publisher);
+    $curtain = $this->buildCurtain($publisher);
+
+    $timeline = $this->buildTransactionTimeline(
+      $publisher,
+      new PhabricatorPackagesPublisherTransactionQuery());
+
+    $publisher_view = id(new PHUITwoColumnView())
+      ->setHeader($header)
+      ->setCurtain($curtain)
+      ->setMainColumn($timeline);
+
+    return $this->newPage()
+      ->setCrumbs($crumbs)
+      ->setPageObjectPHIDs(
+        array(
+          $publisher->getPHID(),
+        ))
+      ->appendChild($publisher_view);
+  }
+
+
+  private function buildHeaderView(PhabricatorPackagesPublisher $publisher) {
+    $viewer = $this->getViewer();
+    $name = $publisher->getName();
+
+    return id(new PHUIHeaderView())
+      ->setViewer($viewer)
+      ->setHeader($name)
+      ->setPolicyObject($publisher)
+      ->setHeaderIcon('fa-paw');
+  }
+
+  private function buildCurtain(PhabricatorPackagesPublisher $publisher) {
+    $viewer = $this->getViewer();
+    $curtain = $this->newCurtainView($publisher);
+
+    $can_edit = PhabricatorPolicyFilter::hasCapability(
+      $viewer,
+      $publisher,
+      PhabricatorPolicyCapability::CAN_EDIT);
+
+    $id = $publisher->getID();
+    $edit_uri = $this->getApplicationURI("publisher/edit/{$id}/");
+
+    $curtain->addAction(
+      id(new PhabricatorActionView())
+        ->setName(pht('Edit Publisher'))
+        ->setIcon('fa-pencil')
+        ->setDisabled(!$can_edit)
+        ->setHref($edit_uri));
+
+    return $curtain;
+  }
+
+}
diff --git a/src/applications/packages/editor/PhabricatorPackagesEditEngine.php b/src/applications/packages/editor/PhabricatorPackagesEditEngine.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/editor/PhabricatorPackagesEditEngine.php
@@ -0,0 +1,14 @@
+<?php
+
+abstract class PhabricatorPackagesEditEngine
+  extends PhabricatorEditEngine {
+
+  public function isEngineConfigurable() {
+    return false;
+  }
+
+  public function getEngineApplicationClass() {
+    return 'PhabricatorPackagesApplication';
+  }
+
+}
diff --git a/src/applications/packages/editor/PhabricatorPackagesEditor.php b/src/applications/packages/editor/PhabricatorPackagesEditor.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/editor/PhabricatorPackagesEditor.php
@@ -0,0 +1,10 @@
+<?php
+
+abstract class PhabricatorPackagesEditor
+  extends PhabricatorApplicationTransactionEditor {
+
+  public function getEditorApplicationClass() {
+    return 'PhabricatorPasteApplication';
+  }
+
+}
diff --git a/src/applications/packages/editor/PhabricatorPackagesPublisherEditEngine.php b/src/applications/packages/editor/PhabricatorPackagesPublisherEditEngine.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/editor/PhabricatorPackagesPublisherEditEngine.php
@@ -0,0 +1,91 @@
+<?php
+
+final class PhabricatorPackagesPublisherEditEngine
+  extends PhabricatorPackagesEditEngine {
+
+  const ENGINECONST = 'packages.publisher';
+
+  public function getEngineName() {
+    return pht('Package Publishers');
+  }
+
+  public function getSummaryHeader() {
+    return pht('Edit Package Publisher Configurations');
+  }
+
+  public function getSummaryText() {
+    return pht('This engine is used to edit Packages publishers.');
+  }
+
+  protected function newEditableObject() {
+    $viewer = $this->getViewer();
+    return PhabricatorPackagesPublisher::initializeNewPublisher($viewer);
+  }
+
+  protected function newObjectQuery() {
+    return new PhabricatorPackagesPublisherQuery();
+  }
+
+  protected function getObjectCreateTitleText($object) {
+    return pht('Create Publisher');
+  }
+
+  protected function getObjectCreateButtonText($object) {
+    return pht('Create Publisher');
+  }
+
+  protected function getObjectEditTitleText($object) {
+    return pht('Edit Publisher: %s', $object->getName());
+  }
+
+  protected function getObjectEditShortText($object) {
+    return pht('Edit Publisher');
+  }
+
+  protected function getObjectCreateShortText() {
+    return pht('Create Publisher');
+  }
+
+  protected function getObjectName() {
+    return pht('Publisher');
+  }
+
+  protected function getEditorURI() {
+    return '/packages/publisher/edit/';
+  }
+
+  protected function getObjectCreateCancelURI($object) {
+    return '/packages/publisher/';
+  }
+
+  protected function getObjectViewURI($object) {
+    return $object->getURI();
+  }
+
+  protected function buildCustomEditFields($object) {
+    $fields = array();
+
+    $fields[] = id(new PhabricatorTextEditField())
+      ->setKey('name')
+      ->setLabel(pht('Name'))
+      ->setDescription(pht('Name of the publisher.'))
+      ->setTransactionType(
+        PhabricatorPackagesPublisherNameTransaction::TRANSACTIONTYPE)
+      ->setIsRequired(true)
+      ->setValue($object->getName());
+
+    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());
+    }
+
+    return $fields;
+  }
+
+}
diff --git a/src/applications/packages/editor/PhabricatorPackagesPublisherEditor.php b/src/applications/packages/editor/PhabricatorPackagesPublisherEditor.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/editor/PhabricatorPackagesPublisherEditor.php
@@ -0,0 +1,51 @@
+<?php
+
+final class PhabricatorPackagesPublisherEditor
+  extends PhabricatorPackagesEditor {
+
+  public function getEditorObjectsDescription() {
+    return pht('Package Publishers');
+  }
+
+  public function getCreateObjectTitle($author, $object) {
+    return pht('%s created this publisher.', $author);
+  }
+
+  public function getCreateObjectTitleForFeed($author, $object) {
+    return pht('%s created %s.', $author, $object);
+  }
+
+  public function getTransactionTypes() {
+    $types = parent::getTransactionTypes();
+    $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(
+      PhabricatorPackagesPublisherKeyTransaction::TRANSACTIONTYPE,
+      pht('Duplicate'),
+      pht(
+        'The publisher key "%s" is already in use by another publisher.',
+        $object->getPublisherKey()),
+      null);
+
+    throw new PhabricatorApplicationTransactionValidationException($errors);
+  }
+
+}
diff --git a/src/applications/packages/phid/PhabricatorPackagesPublisherPHIDType.php b/src/applications/packages/phid/PhabricatorPackagesPublisherPHIDType.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/phid/PhabricatorPackagesPublisherPHIDType.php
@@ -0,0 +1,45 @@
+<?php
+
+final class PhabricatorPackagesPublisherPHIDType
+  extends PhabricatorPHIDType {
+
+  const TYPECONST = 'PPUB';
+
+  public function getTypeName() {
+    return pht('Package Publisher');
+  }
+
+  public function newObject() {
+    return new PhabricatorPackagesPublisher();
+  }
+
+  public function getPHIDTypeApplicationClass() {
+    return 'PhabricatorPackagesApplication';
+  }
+
+  protected function buildQueryForObjects(
+    PhabricatorObjectQuery $query,
+    array $phids) {
+
+    return id(new PhabricatorPackagesPublisherQuery())
+      ->withPHIDs($phids);
+  }
+
+  public function loadHandles(
+    PhabricatorHandleQuery $query,
+    array $handles,
+    array $objects) {
+
+    foreach ($handles as $phid => $handle) {
+      $publisher = $objects[$phid];
+
+      $name = $publisher->getName();
+      $uri = $publisher->getURI();
+
+      $handle
+        ->setName($name)
+        ->setURI($uri);
+    }
+  }
+
+}
diff --git a/src/applications/packages/query/PhabricatorPackagesPublisherQuery.php b/src/applications/packages/query/PhabricatorPackagesPublisherQuery.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/query/PhabricatorPackagesPublisherQuery.php
@@ -0,0 +1,64 @@
+<?php
+
+final class PhabricatorPackagesPublisherQuery
+  extends PhabricatorCursorPagedPolicyAwareQuery {
+
+  private $ids;
+  private $phids;
+  private $publisherKeys;
+
+  public function withIDs(array $ids) {
+    $this->ids = $ids;
+    return $this;
+  }
+
+  public function withPHIDs(array $phids) {
+    $this->phids = $phids;
+    return $this;
+  }
+
+  public function withPublisherKeys(array $keys) {
+    $this->publisherKeys = $keys;
+    return $this;
+  }
+
+  public function newResultObject() {
+    return new PhabricatorPackagesPublisher();
+  }
+
+  protected function loadPage() {
+    return $this->loadStandardPage($this->newResultObject());
+  }
+
+  protected function buildWhereClauseParts(AphrontDatabaseConnection $conn) {
+    $where = parent::buildWhereClauseParts($conn);
+
+    if ($this->ids !== null) {
+      $where[] = qsprintf(
+        $conn,
+        'id IN (%Ld)',
+        $this->ids);
+    }
+
+    if ($this->phids !== null) {
+      $where[] = qsprintf(
+        $conn,
+        'phid IN (%Ls)',
+        $this->phids);
+    }
+
+    if ($this->publisherKeys !== null) {
+      $where[] = qsprintf(
+        $conn,
+        'publisherKey IN (%Ls)',
+        $this->publisherKeys);
+    }
+
+    return $where;
+  }
+
+  public function getQueryApplicationClass() {
+    return 'PhabricatorPackagesApplication';
+  }
+
+}
diff --git a/src/applications/packages/query/PhabricatorPackagesPublisherSearchEngine.php b/src/applications/packages/query/PhabricatorPackagesPublisherSearchEngine.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/query/PhabricatorPackagesPublisherSearchEngine.php
@@ -0,0 +1,77 @@
+<?php
+
+final class PhabricatorPackagesPublisherSearchEngine
+  extends PhabricatorApplicationSearchEngine {
+
+  public function getResultTypeDescription() {
+    return pht('Package Publishers');
+  }
+
+  public function getApplicationClassName() {
+    return 'PhabricatorPackagesApplication';
+  }
+
+  public function newQuery() {
+    return id(new PhabricatorPackagesPublisherQuery());
+  }
+
+  protected function buildQueryFromParameters(array $map) {
+    $query = $this->newQuery();
+
+    return $query;
+  }
+
+  protected function buildCustomSearchFields() {
+    return array();
+  }
+
+  protected function getURI($path) {
+    return '/packages/publisher/'.$path;
+  }
+
+  protected function getBuiltinQueryNames() {
+    $names = array(
+      'all' => pht('All Publishers'),
+    );
+
+    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 $publishers,
+    PhabricatorSavedQuery $query,
+    array $handles) {
+
+    assert_instances_of($publishers, 'PhabricatorPackagesPublisher');
+
+    $viewer = $this->requireViewer();
+
+    $list = id(new PHUIObjectItemListView())
+      ->setViewer($viewer);
+    foreach ($publishers as $publisher) {
+      $item = id(new PHUIObjectItemView())
+        ->setObjectName($publisher->getPublisherKey())
+        ->setHeader($publisher->getName())
+        ->setHref($publisher->getURI());
+
+      $list->addItem($item);
+    }
+
+    return id(new PhabricatorApplicationSearchResultView())
+      ->setObjectList($list)
+      ->setNoDataString(pht('No publishers found.'));
+  }
+
+}
diff --git a/src/applications/packages/query/PhabricatorPackagesPublisherTransactionQuery.php b/src/applications/packages/query/PhabricatorPackagesPublisherTransactionQuery.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/query/PhabricatorPackagesPublisherTransactionQuery.php
@@ -0,0 +1,10 @@
+<?php
+
+final class PhabricatorPackagesPublisherTransactionQuery
+  extends PhabricatorApplicationTransactionQuery {
+
+  public function getTemplateApplicationTransaction() {
+    return new PhabricatorPackagesPublisherTransaction();
+  }
+
+}
diff --git a/src/applications/packages/storage/PhabricatorPackagesDAO.php b/src/applications/packages/storage/PhabricatorPackagesDAO.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/storage/PhabricatorPackagesDAO.php
@@ -0,0 +1,9 @@
+<?php
+
+abstract class PhabricatorPackagesDAO extends PhabricatorLiskDAO {
+
+  public function getApplicationName() {
+    return 'packages';
+  }
+
+}
diff --git a/src/applications/packages/storage/PhabricatorPackagesPublisher.php b/src/applications/packages/storage/PhabricatorPackagesPublisher.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/storage/PhabricatorPackagesPublisher.php
@@ -0,0 +1,191 @@
+<?php
+
+final class PhabricatorPackagesPublisher
+  extends PhabricatorPackagesDAO
+  implements
+    PhabricatorPolicyInterface,
+    PhabricatorApplicationTransactionInterface,
+    PhabricatorDestructibleInterface,
+    PhabricatorSubscribableInterface,
+    PhabricatorProjectInterface,
+    PhabricatorConduitResultInterface {
+
+  protected $name;
+  protected $publisherKey;
+  protected $editPolicy;
+
+  public static function initializeNewPublisher(PhabricatorUser $actor) {
+    return id(new self());
+  }
+
+  protected function getConfiguration() {
+    return array(
+      self::CONFIG_AUX_PHID => true,
+      self::CONFIG_COLUMN_SCHEMA => array(
+        'name' => 'text64',
+        'publisherKey' => 'sort64',
+      ),
+      self::CONFIG_KEY_SCHEMA => array(
+        'key_publisher' => array(
+          'columns' => array('publisherKey'),
+          'unique' => true,
+        ),
+      ),
+    ) + parent::getConfiguration();
+  }
+
+  public function generatePHID() {
+    return PhabricatorPHID::generateNewPHID(
+      PhabricatorPackagesPublisherPHIDType::TYPECONST);
+  }
+
+  public function getURI() {
+    $publisher_key = $this->getPublisherKey();
+    return "/package/{$publisher_key}/";
+  }
+
+  public static function assertValidPublisherName($value) {
+    $length = phutil_utf8_strlen($value);
+    if (!$length) {
+      throw new Exception(
+        pht(
+          'Publisher name "%s" is not valid: publisher names are required.',
+          $value));
+    }
+
+    $max_length = 64;
+    if ($length > $max_length) {
+      throw new Exception(
+        pht(
+          'Publisher name "%s" is not valid: publisher names must not be '.
+          'more than %s characters long.',
+          $value,
+          new PhutilNumber($max_length)));
+    }
+  }
+
+  public static function assertValidPublisherKey($value) {
+    $length = phutil_utf8_strlen($value);
+    if (!$length) {
+      throw new Exception(
+        pht(
+          'Publisher key "%s" is not valid: publisher keys are required.',
+          $value));
+    }
+
+    $max_length = 64;
+    if ($length > $max_length) {
+      throw new Exception(
+        pht(
+          'Publisher key "%s" is not valid: publisher keys must not be '.
+          'more than %s characters long.',
+          $value,
+          new PhutilNumber($max_length)));
+    }
+
+    if (!preg_match('/^[a-z]+\z/', $value)) {
+      throw new Exception(
+        pht(
+          'Publisher key "%s" is not valid: publisher keys may only contain '.
+          'lowercase latin letters.',
+          $value));
+    }
+  }
+
+
+/* -(  PhabricatorSubscribableInterface  )----------------------------------- */
+
+
+  public function isAutomaticallySubscribed($phid) {
+    return false;
+  }
+
+
+/* -(  Policy Interface  )--------------------------------------------------- */
+
+
+  public function getCapabilities() {
+    return array(
+      PhabricatorPolicyCapability::CAN_VIEW,
+      PhabricatorPolicyCapability::CAN_EDIT,
+    );
+  }
+
+  public function getPolicy($capability) {
+    switch ($capability) {
+      case PhabricatorPolicyCapability::CAN_VIEW:
+        return PhabricatorPolicies::getMostOpenPolicy();
+      case PhabricatorPolicyCapability::CAN_EDIT:
+        return $this->getEditPolicy();
+    }
+  }
+
+  public function hasAutomaticCapability($capability, PhabricatorUser $user) {
+    return false;
+  }
+
+  public function describeAutomaticCapability($capability) {
+    return null;
+  }
+
+
+/* -(  PhabricatorDestructibleInterface  )----------------------------------- */
+
+
+  public function destroyObjectPermanently(
+    PhabricatorDestructionEngine $engine) {
+    $this->delete();
+  }
+
+
+/* -(  PhabricatorApplicationTransactionInterface  )------------------------- */
+
+
+  public function getApplicationTransactionEditor() {
+    return new PhabricatorPackagesPublisherEditor();
+  }
+
+  public function getApplicationTransactionObject() {
+    return $this;
+  }
+
+  public function getApplicationTransactionTemplate() {
+    return new PhabricatorPackagesPublisherTransaction();
+  }
+
+  public function willRenderTimeline(
+    PhabricatorApplicationTransactionView $timeline,
+    AphrontRequest $request) {
+    return $timeline;
+  }
+
+
+/* -(  PhabricatorConduitResultInterface  )---------------------------------- */
+
+
+  public function getFieldSpecificationsForConduit() {
+    return array(
+      id(new PhabricatorConduitSearchFieldSpecification())
+        ->setKey('name')
+        ->setType('string')
+        ->setDescription(pht('The name of the publisher.')),
+      id(new PhabricatorConduitSearchFieldSpecification())
+        ->setKey('publisherKey')
+        ->setType('string')
+        ->setDescription(pht('The unique key of the publisher.')),
+    );
+  }
+
+  public function getFieldValuesForConduit() {
+    return array(
+      'name' => $this->getName(),
+      'publisherKey' => $this->getPublisherKey(),
+    );
+  }
+
+  public function getConduitSearchAttachments() {
+    return array();
+  }
+
+
+}
diff --git a/src/applications/packages/storage/PhabricatorPackagesPublisherTransaction.php b/src/applications/packages/storage/PhabricatorPackagesPublisherTransaction.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/storage/PhabricatorPackagesPublisherTransaction.php
@@ -0,0 +1,18 @@
+<?php
+
+final class PhabricatorPackagesPublisherTransaction
+  extends PhabricatorModularTransaction {
+
+  public function getApplicationName() {
+    return 'packages';
+  }
+
+  public function getApplicationTransactionType() {
+    return PhabricatorPackagesPublisherPHIDType::TYPECONST;
+  }
+
+  public function getBaseTransactionClass() {
+    return 'PhabricatorPackagesPublisherTransactionType';
+  }
+
+}
diff --git a/src/applications/packages/storage/PhabricatorPackagesSchemaSpec.php b/src/applications/packages/storage/PhabricatorPackagesSchemaSpec.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/storage/PhabricatorPackagesSchemaSpec.php
@@ -0,0 +1,10 @@
+<?php
+
+final class PhabricatorPackagesSchemaSpec
+  extends PhabricatorConfigSchemaSpec {
+
+  public function buildSchemata() {
+    $this->buildEdgeSchemata(new PhabricatorPackagesPublisher());
+  }
+
+}
diff --git a/src/applications/packages/xaction/PhabricatorPackagesTransactionType.php b/src/applications/packages/xaction/PhabricatorPackagesTransactionType.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/xaction/PhabricatorPackagesTransactionType.php
@@ -0,0 +1,4 @@
+<?php
+
+abstract class PhabricatorPackagesTransactionType
+  extends PhabricatorModularTransactionType {}
diff --git a/src/applications/packages/xaction/publisher/PhabricatorPackagesPublisherKeyTransaction.php b/src/applications/packages/xaction/publisher/PhabricatorPackagesPublisherKeyTransaction.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/xaction/publisher/PhabricatorPackagesPublisherKeyTransaction.php
@@ -0,0 +1,44 @@
+<?php
+
+final class PhabricatorPackagesPublisherKeyTransaction
+  extends PhabricatorPackagesPublisherTransactionType {
+
+  const TRANSACTIONTYPE = 'packages.publisher.key';
+
+  public function generateOldValue($object) {
+    return $object->getPublisherKey();
+  }
+
+  public function applyInternalEffects($object, $value) {
+    $object->setPublisherKey($value);
+  }
+
+  public function validateTransactions($object, array $xactions) {
+    $errors = array();
+
+    if ($this->isEmptyTextTransaction($object->getName(), $xactions)) {
+      $errors[] = $this->newRequiredError(
+        pht('Publishers must have a unique publisher key.'));
+    }
+
+    if (!$this->isNewObject()) {
+      foreach ($xactions as $xaction) {
+        $errors[] = $this->newInvalidError(
+          pht('Once a publisher is created, its key can not be changed.'),
+          $xaction);
+      }
+    }
+
+    foreach ($xactions as $xaction) {
+      $value = $xaction->getNewValue();
+      try {
+        PhabricatorPackagesPublisher::assertValidPublisherKey($value);
+      } catch (Exception $ex) {
+        $errors[] = $this->newInvalidError($ex->getMessage(), $xaction);
+      }
+    }
+
+    return $errors;
+  }
+
+}
diff --git a/src/applications/packages/xaction/publisher/PhabricatorPackagesPublisherNameTransaction.php b/src/applications/packages/xaction/publisher/PhabricatorPackagesPublisherNameTransaction.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/xaction/publisher/PhabricatorPackagesPublisherNameTransaction.php
@@ -0,0 +1,53 @@
+<?php
+
+final class PhabricatorPackagesPublisherNameTransaction
+  extends PhabricatorPackagesPublisherTransactionType {
+
+  const TRANSACTIONTYPE = 'packages.publisher.name';
+
+  public function generateOldValue($object) {
+    return $object->getName();
+  }
+
+  public function applyInternalEffects($object, $value) {
+    $object->setName($value);
+  }
+
+  public function getTitle() {
+    return pht(
+      '%s changed the name of this publisher 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[] = $this->newRequiredError(
+        pht('Publishers must have a name.'));
+    }
+
+    foreach ($xactions as $xaction) {
+      $value = $xaction->getNewValue();
+      try {
+        PhabricatorPackagesPublisher::assertValidPublisherName($value);
+      } catch (Exception $ex) {
+        $errors[] = $this->newInvalidError($ex->getMessage(), $xaction);
+      }
+    }
+
+    return $errors;
+  }
+
+}
diff --git a/src/applications/packages/xaction/publisher/PhabricatorPackagesPublisherTransactionType.php b/src/applications/packages/xaction/publisher/PhabricatorPackagesPublisherTransactionType.php
new file mode 100644
--- /dev/null
+++ b/src/applications/packages/xaction/publisher/PhabricatorPackagesPublisherTransactionType.php
@@ -0,0 +1,4 @@
+<?php
+
+abstract class PhabricatorPackagesPublisherTransactionType
+  extends PhabricatorPackagesTransactionType {}
diff --git a/src/infrastructure/storage/patch/PhabricatorBuiltinPatchList.php b/src/infrastructure/storage/patch/PhabricatorBuiltinPatchList.php
--- a/src/infrastructure/storage/patch/PhabricatorBuiltinPatchList.php
+++ b/src/infrastructure/storage/patch/PhabricatorBuiltinPatchList.php
@@ -111,6 +111,7 @@
       'db.spaces' => array(),
       'db.phurl' => array(),
       'db.badges' => array(),
+      'db.packages' => array(),
       '0000.legacy.sql' => array(
         'legacy' => 0,
       ),