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
@@ -2153,6 +2153,7 @@
     'PhabricatorBoardLayoutEngine' => 'applications/project/engine/PhabricatorBoardLayoutEngine.php',
     'PhabricatorBoardRenderingEngine' => 'applications/project/engine/PhabricatorBoardRenderingEngine.php',
     'PhabricatorBoardResponseEngine' => 'applications/project/engine/PhabricatorBoardResponseEngine.php',
+    'PhabricatorBoolConfigType' => 'applications/config/type/PhabricatorBoolConfigType.php',
     'PhabricatorBoolEditField' => 'applications/transactions/editfield/PhabricatorBoolEditField.php',
     'PhabricatorBritishEnglishTranslation' => 'infrastructure/internationalization/translation/PhabricatorBritishEnglishTranslation.php',
     'PhabricatorBuiltinDraftEngine' => 'applications/transactions/draft/PhabricatorBuiltinDraftEngine.php',
@@ -7356,6 +7357,7 @@
     'PhabricatorBoardLayoutEngine' => 'Phobject',
     'PhabricatorBoardRenderingEngine' => 'Phobject',
     'PhabricatorBoardResponseEngine' => 'Phobject',
+    'PhabricatorBoolConfigType' => 'PhabricatorTextConfigType',
     'PhabricatorBoolEditField' => 'PhabricatorEditField',
     'PhabricatorBritishEnglishTranslation' => 'PhutilTranslation',
     'PhabricatorBuiltinDraftEngine' => 'PhabricatorDraftEngine',
diff --git a/src/applications/config/controller/PhabricatorConfigEditController.php b/src/applications/config/controller/PhabricatorConfigEditController.php
--- a/src/applications/config/controller/PhabricatorConfigEditController.php
+++ b/src/applications/config/controller/PhabricatorConfigEditController.php
@@ -350,20 +350,6 @@
         case 'set':
           $set_value = array_fill_keys($request->getStrList('value'), true);
           break;
-        case 'bool':
-          switch ($value) {
-            case 'true':
-              $set_value = true;
-              break;
-            case 'false':
-              $set_value = false;
-              break;
-            default:
-              $e_value = pht('Invalid');
-              $errors[] = pht('Value must be boolean, "true" or "false".');
-              break;
-          }
-          break;
         case 'class':
           if (!class_exists($value)) {
             $e_value = pht('Invalid');
@@ -425,8 +411,6 @@
       switch ($type) {
         case 'class':
           return $value;
-        case 'bool':
-          return $value ? 'true' : 'false';
         case 'set':
           return implode("\n", nonempty(array_keys($value), array()));
         default:
@@ -456,15 +440,6 @@
     } else {
       $type = $option->getType();
       switch ($type) {
-        case 'bool':
-          $control = id(new AphrontFormSelectControl())
-            ->setOptions(
-              array(
-                ''      => pht('(Use Default)'),
-                'true'  => idx($option->getBoolOptions(), 0),
-                'false' => idx($option->getBoolOptions(), 1),
-              ));
-          break;
         case 'class':
           $symbols = id(new PhutilSymbolLoader())
             ->setType('class')
diff --git a/src/applications/config/management/PhabricatorConfigManagementSetWorkflow.php b/src/applications/config/management/PhabricatorConfigManagementSetWorkflow.php
--- a/src/applications/config/management/PhabricatorConfigManagementSetWorkflow.php
+++ b/src/applications/config/management/PhabricatorConfigManagementSetWorkflow.php
@@ -75,21 +75,6 @@
         case 'class':
           $value = (string)$value;
           break;
-        case 'bool':
-          if ($value == 'true') {
-            $value = true;
-          } else if ($value == 'false') {
-            $value = false;
-          } else {
-            throw new PhutilArgumentUsageException(
-              pht(
-                "Config key '%s' is of type '%s'. Specify '%s' or '%s'.",
-                $key,
-                $type,
-                'true',
-                'false'));
-          }
-          break;
         default:
           $value = json_decode($value, true);
           if (!is_array($value)) {
diff --git a/src/applications/config/option/PhabricatorApplicationConfigOptions.php b/src/applications/config/option/PhabricatorApplicationConfigOptions.php
--- a/src/applications/config/option/PhabricatorApplicationConfigOptions.php
+++ b/src/applications/config/option/PhabricatorApplicationConfigOptions.php
@@ -43,15 +43,6 @@
     }
 
     switch ($option->getType()) {
-      case 'bool':
-        if ($value !== true &&
-            $value !== false) {
-          throw new PhabricatorConfigValidationException(
-            pht(
-              "Option '%s' is of type bool, but value is not true or false.",
-              $option->getKey()));
-        }
-        break;
       case 'class':
         $symbols = id(new PhutilSymbolLoader())
           ->setType('class')
diff --git a/src/applications/config/type/PhabricatorBoolConfigType.php b/src/applications/config/type/PhabricatorBoolConfigType.php
new file mode 100644
--- /dev/null
+++ b/src/applications/config/type/PhabricatorBoolConfigType.php
@@ -0,0 +1,62 @@
+<?php
+
+final class PhabricatorBoolConfigType
+  extends PhabricatorTextConfigType {
+
+  const TYPEKEY = 'bool';
+
+  protected function newCanonicalValue(
+    PhabricatorConfigOption $option,
+    $value) {
+
+    if (!preg_match('/^(true|false)\z/', $value)) {
+      throw $this->newException(
+        pht(
+          'Value for option "%s" of type "%s" must be either '.
+          '"true" or "false".',
+          $option->getKey(),
+          $this->getTypeKey()));
+    }
+
+    return ($value === 'true');
+  }
+
+  public function newDisplayValue(
+    PhabricatorConfigOption $option,
+    $value) {
+
+    if ($value) {
+      return 'true';
+    } else {
+      return 'false';
+    }
+  }
+
+  public function validateStoredValue(
+    PhabricatorConfigOption $option,
+    $value) {
+
+    if (!is_bool($value)) {
+      throw $this->newException(
+        pht(
+          'Option "%s" is of type "%s", but the configured value is not '.
+          'a boolean.',
+          $option->getKey(),
+          $this->getTypeKey()));
+    }
+  }
+
+  protected function newControl(PhabricatorConfigOption $option) {
+    $bool_map = $option->getBoolOptions();
+
+    $map = array(
+      '' => pht('(Use Default)'),
+    ) + array(
+      'true'  => idx($bool_map, 0),
+      'false' => idx($bool_map, 1),
+    );
+
+    return id(new AphrontFormSelectControl())
+      ->setOptions($map);
+  }
+}