diff --git a/src/applications/differential/lipsum/PhabricatorDifferentialRevisionTestDataGenerator.php b/src/applications/differential/lipsum/PhabricatorDifferentialRevisionTestDataGenerator.php
--- a/src/applications/differential/lipsum/PhabricatorDifferentialRevisionTestDataGenerator.php
+++ b/src/applications/differential/lipsum/PhabricatorDifferentialRevisionTestDataGenerator.php
@@ -3,6 +3,8 @@
 final class PhabricatorDifferentialRevisionTestDataGenerator
   extends PhabricatorTestDataGenerator {
 
+  const GENERATORKEY = 'revisions';
+
   public function getGeneratorName() {
     return pht('Differential Revisions');
   }
diff --git a/src/applications/files/lipsum/PhabricatorFileTestDataGenerator.php b/src/applications/files/lipsum/PhabricatorFileTestDataGenerator.php
--- a/src/applications/files/lipsum/PhabricatorFileTestDataGenerator.php
+++ b/src/applications/files/lipsum/PhabricatorFileTestDataGenerator.php
@@ -3,6 +3,8 @@
 final class PhabricatorFileTestDataGenerator
   extends PhabricatorTestDataGenerator {
 
+  const GENERATORKEY = 'files';
+
   public function getGeneratorName() {
     return pht('Files');
   }
diff --git a/src/applications/lipsum/generator/PhabricatorTestDataGenerator.php b/src/applications/lipsum/generator/PhabricatorTestDataGenerator.php
--- a/src/applications/lipsum/generator/PhabricatorTestDataGenerator.php
+++ b/src/applications/lipsum/generator/PhabricatorTestDataGenerator.php
@@ -16,6 +16,10 @@
     return $this->viewer;
   }
 
+  final public function getGeneratorKey() {
+    return $this->getPhobjectClassConstant('GENERATORKEY', 64);
+  }
+
   protected function loadRandomPHID($table) {
     $conn_r = $table->establishConnection('r');
 
diff --git a/src/applications/lipsum/management/PhabricatorLipsumGenerateWorkflow.php b/src/applications/lipsum/management/PhabricatorLipsumGenerateWorkflow.php
--- a/src/applications/lipsum/management/PhabricatorLipsumGenerateWorkflow.php
+++ b/src/applications/lipsum/management/PhabricatorLipsumGenerateWorkflow.php
@@ -30,14 +30,30 @@
 
     $all_generators = id(new PhutilClassMapQuery())
       ->setAncestorClass('PhabricatorTestDataGenerator')
+      ->setUniqueMethod('getGeneratorKey')
       ->execute();
 
     $argv = $args->getArg('args');
     $all = 'all';
 
+    if (isset($all_generators[$all])) {
+      throw new Exception(
+        pht(
+          'A lipsum generator is registered with key "%s". This key is '.
+          'reserved.',
+          $all));
+    }
+
     if (!$argv) {
-      $names = mpull($all_generators, 'getGeneratorName');
-      sort($names);
+      ksort($all_generators);
+
+      $names = array();
+      foreach ($all_generators as $generator) {
+        $names[] = tsprintf(
+          '%s (%s)',
+          $generator->getGeneratorKey(),
+          $generator->getGeneratorName());
+      }
 
       $list = id(new PhutilConsoleList())
         ->setWrap(false)
@@ -59,31 +75,49 @@
     foreach ($argv as $arg_original) {
       $arg = phutil_utf8_strtolower($arg_original);
 
-      $match = false;
-      foreach ($all_generators as $generator) {
-        $name = phutil_utf8_strtolower($generator->getGeneratorName());
+      if ($arg == 'all') {
+        $matches = $all_generators;
+      } else {
+        $matches = array();
+        foreach ($all_generators as $generator) {
+          $name = phutil_utf8_strtolower($generator->getGeneratorKey());
+
+          // If there's an exact match, select just that generator.
+          if ($arg == $name) {
+            $matches = array($generator);
+            break;
+          }
+
+          // If there's a partial match, match that generator but continue.
+          if (strpos($name, $arg) !== false) {
+            $matches[] = $generator;
+          }
+        }
 
-        if ($arg == $all) {
-          $generators[] = $generator;
-          $match = true;
-          break;
+        if (!$matches) {
+          throw new PhutilArgumentUsageException(
+            pht(
+              'Argument "%s" does not match the name of any generators.',
+              $arg_original));
         }
 
-        if (strpos($name, $arg) !== false) {
-          $generators[] = $generator;
-          $match = true;
-          break;
+        if (count($matches) > 1) {
+          throw new PhutilArgumentUsageException(
+            pht(
+              'Argument "%s" is ambiguous, and matches multiple '.
+              'generators: %s.',
+              $arg_original,
+              implode(', ', mpull($matches, 'getGeneratorName'))));
         }
       }
 
-      if (!$match) {
-        throw new PhutilArgumentUsageException(
-          pht(
-            'Argument "%s" does not match the name of any generators.',
-            $arg_original));
+      foreach ($matches as $match) {
+        $generators[] = $match;
       }
     }
 
+    $generators = mpull($generators, null, 'getGeneratorKey');
+
     echo tsprintf(
       "**<bg:blue> %s </bg>** %s\n",
       pht('GENERATORS'),
diff --git a/src/applications/maniphest/lipsum/PhabricatorManiphestTaskTestDataGenerator.php b/src/applications/maniphest/lipsum/PhabricatorManiphestTaskTestDataGenerator.php
--- a/src/applications/maniphest/lipsum/PhabricatorManiphestTaskTestDataGenerator.php
+++ b/src/applications/maniphest/lipsum/PhabricatorManiphestTaskTestDataGenerator.php
@@ -3,6 +3,8 @@
 final class PhabricatorManiphestTaskTestDataGenerator
   extends PhabricatorTestDataGenerator {
 
+  const GENERATORKEY = 'tasks';
+
   public function getGeneratorName() {
     return pht('Maniphest Tasks');
   }
diff --git a/src/applications/paste/lipsum/PhabricatorPasteTestDataGenerator.php b/src/applications/paste/lipsum/PhabricatorPasteTestDataGenerator.php
--- a/src/applications/paste/lipsum/PhabricatorPasteTestDataGenerator.php
+++ b/src/applications/paste/lipsum/PhabricatorPasteTestDataGenerator.php
@@ -3,6 +3,8 @@
 final class PhabricatorPasteTestDataGenerator
   extends PhabricatorTestDataGenerator {
 
+  const GENERATORKEY = 'pastes';
+
   public function getGeneratorName() {
     return pht('Pastes');
   }
diff --git a/src/applications/people/lipsum/PhabricatorPeopleTestDataGenerator.php b/src/applications/people/lipsum/PhabricatorPeopleTestDataGenerator.php
--- a/src/applications/people/lipsum/PhabricatorPeopleTestDataGenerator.php
+++ b/src/applications/people/lipsum/PhabricatorPeopleTestDataGenerator.php
@@ -3,6 +3,8 @@
 final class PhabricatorPeopleTestDataGenerator
   extends PhabricatorTestDataGenerator {
 
+  const GENERATORKEY = 'users';
+
   public function getGeneratorName() {
     return pht('User Accounts');
   }
diff --git a/src/applications/pholio/lipsum/PhabricatorPholioMockTestDataGenerator.php b/src/applications/pholio/lipsum/PhabricatorPholioMockTestDataGenerator.php
--- a/src/applications/pholio/lipsum/PhabricatorPholioMockTestDataGenerator.php
+++ b/src/applications/pholio/lipsum/PhabricatorPholioMockTestDataGenerator.php
@@ -3,6 +3,8 @@
 final class PhabricatorPholioMockTestDataGenerator
   extends PhabricatorTestDataGenerator {
 
+  const GENERATORKEY = 'mocks';
+
   public function getGeneratorName() {
     return pht('Pholio Mocks');
   }
diff --git a/src/applications/project/lipsum/PhabricatorProjectTestDataGenerator.php b/src/applications/project/lipsum/PhabricatorProjectTestDataGenerator.php
--- a/src/applications/project/lipsum/PhabricatorProjectTestDataGenerator.php
+++ b/src/applications/project/lipsum/PhabricatorProjectTestDataGenerator.php
@@ -3,6 +3,8 @@
 final class PhabricatorProjectTestDataGenerator
   extends PhabricatorTestDataGenerator {
 
+  const GENERATORKEY = 'projects';
+
   public function getGeneratorName() {
     return pht('Projects');
   }