diff --git a/resources/sql/autopatches/20170905.ferret.01.diff.doc.sql b/resources/sql/autopatches/20170905.ferret.01.diff.doc.sql
new file mode 100644
--- /dev/null
+++ b/resources/sql/autopatches/20170905.ferret.01.diff.doc.sql
@@ -0,0 +1,9 @@
+CREATE TABLE {$NAMESPACE}_differential.differential_revision_fdocument (
+  id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+  objectPHID VARBINARY(64) NOT NULL,
+  isClosed BOOL NOT NULL,
+  authorPHID VARBINARY(64),
+  ownerPHID VARBINARY(64),
+  epochCreated INT UNSIGNED NOT NULL,
+  epochModified INT UNSIGNED NOT NULL
+) ENGINE=InnoDB, COLLATE {$COLLATE_TEXT};
diff --git a/resources/sql/autopatches/20170905.ferret.02.diff.field.sql b/resources/sql/autopatches/20170905.ferret.02.diff.field.sql
new file mode 100644
--- /dev/null
+++ b/resources/sql/autopatches/20170905.ferret.02.diff.field.sql
@@ -0,0 +1,8 @@
+CREATE TABLE {$NAMESPACE}_differential.differential_revision_ffield (
+  id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+  documentID INT UNSIGNED NOT NULL,
+  fieldKey VARCHAR(4) NOT NULL COLLATE {$COLLATE_TEXT},
+  rawCorpus LONGTEXT NOT NULL COLLATE {$COLLATE_SORT},
+  termCorpus LONGTEXT NOT NULL COLLATE {$COLLATE_SORT},
+  normalCorpus LONGTEXT NOT NULL COLLATE {$COLLATE_SORT}
+) ENGINE=InnoDB, COLLATE {$COLLATE_TEXT};
diff --git a/resources/sql/autopatches/20170905.ferret.03.diff.ngrams.sql b/resources/sql/autopatches/20170905.ferret.03.diff.ngrams.sql
new file mode 100644
--- /dev/null
+++ b/resources/sql/autopatches/20170905.ferret.03.diff.ngrams.sql
@@ -0,0 +1,5 @@
+CREATE TABLE {$NAMESPACE}_differential.differential_revision_fngrams (
+  id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+  documentID INT UNSIGNED NOT NULL,
+  ngram CHAR(3) NOT NULL COLLATE {$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
@@ -532,6 +532,10 @@
     'DifferentialRevisionEditConduitAPIMethod' => 'applications/differential/conduit/DifferentialRevisionEditConduitAPIMethod.php',
     'DifferentialRevisionEditController' => 'applications/differential/controller/DifferentialRevisionEditController.php',
     'DifferentialRevisionEditEngine' => 'applications/differential/editor/DifferentialRevisionEditEngine.php',
+    'DifferentialRevisionFerretDocument' => 'applications/differential/storage/DifferentialRevisionFerretDocument.php',
+    'DifferentialRevisionFerretEngine' => 'applications/differential/search/DifferentialRevisionFerretEngine.php',
+    'DifferentialRevisionFerretField' => 'applications/differential/storage/DifferentialRevisionFerretField.php',
+    'DifferentialRevisionFerretNgrams' => 'applications/differential/storage/DifferentialRevisionFerretNgrams.php',
     'DifferentialRevisionFulltextEngine' => 'applications/differential/search/DifferentialRevisionFulltextEngine.php',
     'DifferentialRevisionGraph' => 'infrastructure/graph/DifferentialRevisionGraph.php',
     'DifferentialRevisionHasChildRelationship' => 'applications/differential/relationships/DifferentialRevisionHasChildRelationship.php',
@@ -5522,6 +5526,7 @@
       'PhabricatorDestructibleInterface',
       'PhabricatorProjectInterface',
       'PhabricatorFulltextInterface',
+      'PhabricatorFerretInterface',
       'PhabricatorConduitResultInterface',
       'PhabricatorDraftInterface',
     ),
@@ -5545,6 +5550,10 @@
     'DifferentialRevisionEditConduitAPIMethod' => 'PhabricatorEditEngineAPIMethod',
     'DifferentialRevisionEditController' => 'DifferentialController',
     'DifferentialRevisionEditEngine' => 'PhabricatorEditEngine',
+    'DifferentialRevisionFerretDocument' => 'PhabricatorFerretDocument',
+    'DifferentialRevisionFerretEngine' => 'PhabricatorFerretEngine',
+    'DifferentialRevisionFerretField' => 'PhabricatorFerretField',
+    'DifferentialRevisionFerretNgrams' => 'PhabricatorFerretNgrams',
     'DifferentialRevisionFulltextEngine' => 'PhabricatorFulltextEngine',
     'DifferentialRevisionGraph' => 'PhabricatorObjectGraph',
     'DifferentialRevisionHasChildRelationship' => 'DifferentialRevisionRelationship',
diff --git a/src/applications/differential/search/DifferentialRevisionFerretEngine.php b/src/applications/differential/search/DifferentialRevisionFerretEngine.php
new file mode 100644
--- /dev/null
+++ b/src/applications/differential/search/DifferentialRevisionFerretEngine.php
@@ -0,0 +1,26 @@
+<?php
+
+final class DifferentialRevisionFerretEngine
+  extends PhabricatorFerretEngine {
+
+  public function newNgramsObject() {
+    return new DifferentialRevisionFerretNgrams();
+  }
+
+  public function newDocumentObject() {
+    return new DifferentialRevisionFerretDocument();
+  }
+
+  public function newFieldObject() {
+    return new DifferentialRevisionFerretField();
+  }
+
+  protected function getFunctionMap() {
+    $map = parent::getFunctionMap();
+
+    $map['body']['aliases'][] = 'summary';
+
+    return $map;
+  }
+
+}
diff --git a/src/applications/differential/storage/DifferentialRevision.php b/src/applications/differential/storage/DifferentialRevision.php
--- a/src/applications/differential/storage/DifferentialRevision.php
+++ b/src/applications/differential/storage/DifferentialRevision.php
@@ -15,6 +15,7 @@
     PhabricatorDestructibleInterface,
     PhabricatorProjectInterface,
     PhabricatorFulltextInterface,
+    PhabricatorFerretInterface,
     PhabricatorConduitResultInterface,
     PhabricatorDraftInterface {
 
@@ -900,6 +901,14 @@
   }
 
 
+/* -(  PhabricatorFerretInterface  )----------------------------------------- */
+
+
+  public function newFerretEngine() {
+    return new DifferentialRevisionFerretEngine();
+  }
+
+
 /* -(  PhabricatorConduitResultInterface  )---------------------------------- */
 
 
diff --git a/src/applications/differential/storage/DifferentialRevisionFerretDocument.php b/src/applications/differential/storage/DifferentialRevisionFerretDocument.php
new file mode 100644
--- /dev/null
+++ b/src/applications/differential/storage/DifferentialRevisionFerretDocument.php
@@ -0,0 +1,14 @@
+<?php
+
+final class DifferentialRevisionFerretDocument
+  extends PhabricatorFerretDocument {
+
+  public function getApplicationName() {
+    return 'differential';
+  }
+
+  public function getIndexKey() {
+    return 'revision';
+  }
+
+}
diff --git a/src/applications/differential/storage/DifferentialRevisionFerretField.php b/src/applications/differential/storage/DifferentialRevisionFerretField.php
new file mode 100644
--- /dev/null
+++ b/src/applications/differential/storage/DifferentialRevisionFerretField.php
@@ -0,0 +1,14 @@
+<?php
+
+final class DifferentialRevisionFerretField
+  extends PhabricatorFerretField {
+
+  public function getApplicationName() {
+    return 'differential';
+  }
+
+  public function getIndexKey() {
+    return 'revision';
+  }
+
+}
diff --git a/src/applications/differential/storage/DifferentialRevisionFerretNgrams.php b/src/applications/differential/storage/DifferentialRevisionFerretNgrams.php
new file mode 100644
--- /dev/null
+++ b/src/applications/differential/storage/DifferentialRevisionFerretNgrams.php
@@ -0,0 +1,14 @@
+<?php
+
+final class DifferentialRevisionFerretNgrams
+  extends PhabricatorFerretNgrams {
+
+  public function getApplicationName() {
+    return 'differential';
+  }
+
+  public function getIndexKey() {
+    return 'revision';
+  }
+
+}