diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
index 4b138f4c4f..0df73916a6 100644
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -1917,6 +1917,8 @@ phutil_register_library_map(array(
     'PhabricatorAuthProviderConfigQuery' => 'applications/auth/query/PhabricatorAuthProviderConfigQuery.php',
     'PhabricatorAuthProviderConfigTransaction' => 'applications/auth/storage/PhabricatorAuthProviderConfigTransaction.php',
     'PhabricatorAuthProviderConfigTransactionQuery' => 'applications/auth/query/PhabricatorAuthProviderConfigTransactionQuery.php',
+    'PhabricatorAuthProvidersGuidanceContext' => 'applications/auth/guidance/PhabricatorAuthProvidersGuidanceContext.php',
+    'PhabricatorAuthProvidersGuidanceEngineExtension' => 'applications/auth/guidance/PhabricatorAuthProvidersGuidanceEngineExtension.php',
     'PhabricatorAuthQueryPublicKeysConduitAPIMethod' => 'applications/auth/conduit/PhabricatorAuthQueryPublicKeysConduitAPIMethod.php',
     'PhabricatorAuthRegisterController' => 'applications/auth/controller/PhabricatorAuthRegisterController.php',
     'PhabricatorAuthRevokeTokenController' => 'applications/auth/controller/PhabricatorAuthRevokeTokenController.php',
@@ -2728,6 +2730,10 @@ phutil_register_library_map(array(
     'PhabricatorGlobalLock' => 'infrastructure/util/PhabricatorGlobalLock.php',
     'PhabricatorGlobalUploadTargetView' => 'applications/files/view/PhabricatorGlobalUploadTargetView.php',
     'PhabricatorGoogleAuthProvider' => 'applications/auth/provider/PhabricatorGoogleAuthProvider.php',
+    'PhabricatorGuidanceContext' => 'applications/guides/guidance/PhabricatorGuidanceContext.php',
+    'PhabricatorGuidanceEngine' => 'applications/guides/guidance/PhabricatorGuidanceEngine.php',
+    'PhabricatorGuidanceEngineExtension' => 'applications/guides/guidance/PhabricatorGuidanceEngineExtension.php',
+    'PhabricatorGuidanceMessage' => 'applications/guides/guidance/PhabricatorGuidanceMessage.php',
     'PhabricatorGuideApplication' => 'applications/guides/application/PhabricatorGuideApplication.php',
     'PhabricatorGuideController' => 'applications/guides/controller/PhabricatorGuideController.php',
     'PhabricatorGuideInstallModule' => 'applications/guides/module/PhabricatorGuideInstallModule.php',
@@ -3218,6 +3224,7 @@ phutil_register_library_map(array(
     'PhabricatorPeopleApproveController' => 'applications/people/controller/PhabricatorPeopleApproveController.php',
     'PhabricatorPeopleController' => 'applications/people/controller/PhabricatorPeopleController.php',
     'PhabricatorPeopleCreateController' => 'applications/people/controller/PhabricatorPeopleCreateController.php',
+    'PhabricatorPeopleCreateGuidanceContext' => 'applications/people/guidance/PhabricatorPeopleCreateGuidanceContext.php',
     'PhabricatorPeopleDatasource' => 'applications/people/typeahead/PhabricatorPeopleDatasource.php',
     'PhabricatorPeopleDeleteController' => 'applications/people/controller/PhabricatorPeopleDeleteController.php',
     'PhabricatorPeopleDetailsProfilePanel' => 'applications/people/profilepanel/PhabricatorPeopleDetailsProfilePanel.php',
@@ -6730,6 +6737,8 @@ phutil_register_library_map(array(
     'PhabricatorAuthProviderConfigQuery' => 'PhabricatorCursorPagedPolicyAwareQuery',
     'PhabricatorAuthProviderConfigTransaction' => 'PhabricatorApplicationTransaction',
     'PhabricatorAuthProviderConfigTransactionQuery' => 'PhabricatorApplicationTransactionQuery',
+    'PhabricatorAuthProvidersGuidanceContext' => 'PhabricatorGuidanceContext',
+    'PhabricatorAuthProvidersGuidanceEngineExtension' => 'PhabricatorGuidanceEngineExtension',
     'PhabricatorAuthQueryPublicKeysConduitAPIMethod' => 'PhabricatorAuthConduitAPIMethod',
     'PhabricatorAuthRegisterController' => 'PhabricatorAuthController',
     'PhabricatorAuthRevokeTokenController' => 'PhabricatorAuthController',
@@ -7687,6 +7696,10 @@ phutil_register_library_map(array(
     'PhabricatorGlobalLock' => 'PhutilLock',
     'PhabricatorGlobalUploadTargetView' => 'AphrontView',
     'PhabricatorGoogleAuthProvider' => 'PhabricatorOAuth2AuthProvider',
+    'PhabricatorGuidanceContext' => 'Phobject',
+    'PhabricatorGuidanceEngine' => 'Phobject',
+    'PhabricatorGuidanceEngineExtension' => 'Phobject',
+    'PhabricatorGuidanceMessage' => 'Phobject',
     'PhabricatorGuideApplication' => 'PhabricatorApplication',
     'PhabricatorGuideController' => 'PhabricatorController',
     'PhabricatorGuideInstallModule' => 'PhabricatorGuideModule',
@@ -8256,6 +8269,7 @@ phutil_register_library_map(array(
     'PhabricatorPeopleApproveController' => 'PhabricatorPeopleController',
     'PhabricatorPeopleController' => 'PhabricatorController',
     'PhabricatorPeopleCreateController' => 'PhabricatorPeopleController',
+    'PhabricatorPeopleCreateGuidanceContext' => 'PhabricatorGuidanceContext',
     'PhabricatorPeopleDatasource' => 'PhabricatorTypeaheadDatasource',
     'PhabricatorPeopleDeleteController' => 'PhabricatorPeopleController',
     'PhabricatorPeopleDetailsProfilePanel' => 'PhabricatorProfilePanel',
diff --git a/src/applications/auth/controller/config/PhabricatorAuthListController.php b/src/applications/auth/controller/config/PhabricatorAuthListController.php
index df168dfe14..ae5808ed78 100644
--- a/src/applications/auth/controller/config/PhabricatorAuthListController.php
+++ b/src/applications/auth/controller/config/PhabricatorAuthListController.php
@@ -94,58 +94,12 @@ final class PhabricatorAuthListController
     $crumbs->addTextCrumb(pht('Auth Providers'));
     $crumbs->setBorder(true);
 
-    $domains_key = 'auth.email-domains';
-    $domains_link = $this->renderConfigLink($domains_key);
-    $domains_value = PhabricatorEnv::getEnvConfig($domains_key);
+    $guidance_context = new PhabricatorAuthProvidersGuidanceContext();
 
-    $approval_key = 'auth.require-approval';
-    $approval_link = $this->renderConfigLink($approval_key);
-    $approval_value = PhabricatorEnv::getEnvConfig($approval_key);
-
-    $issues = array();
-    if ($domains_value) {
-      $issues[] = pht(
-        'Phabricator is configured with an email domain whitelist (in %s), so '.
-        'only users with a verified email address at one of these %s '.
-        'allowed domain(s) will be able to register an account: %s',
-        $domains_link,
-        phutil_count($domains_value),
-        phutil_tag('strong', array(), implode(', ', $domains_value)));
-    } else {
-      $issues[] = pht(
-        'Anyone who can browse to this Phabricator install will be able to '.
-        'register an account. To add email domain restrictions, configure '.
-        '%s.',
-        $domains_link);
-    }
-
-    if ($approval_value) {
-      $issues[] = pht(
-        'Administrative approvals are enabled (in %s), so all new users must '.
-        'have their accounts approved by an administrator.',
-        $approval_link);
-    } else {
-      $issues[] = pht(
-        'Administrative approvals are disabled, so users who register will '.
-        'be able to use their accounts immediately. To enable approvals, '.
-        'configure %s.',
-        $approval_link);
-    }
-
-    if (!$domains_value && !$approval_value) {
-      $severity = PHUIInfoView::SEVERITY_WARNING;
-      $issues[] = pht(
-        'You can safely ignore this warning if the install itself has '.
-        'access controls (for example, it is deployed on a VPN) or if all of '.
-        'the configured providers have access controls (for example, they are '.
-        'all private LDAP or OAuth servers).');
-    } else {
-      $severity = PHUIInfoView::SEVERITY_NOTICE;
-    }
-
-    $warning = id(new PHUIInfoView())
-      ->setSeverity($severity)
-      ->setErrors($issues);
+    $guidance = id(new PhabricatorGuidanceEngine())
+      ->setViewer($viewer)
+      ->setGuidanceContext($guidance_context)
+      ->newInfoView();
 
     $button = id(new PHUIButtonView())
         ->setTag('a')
@@ -170,7 +124,7 @@ final class PhabricatorAuthListController
     $view = id(new PHUITwoColumnView())
       ->setHeader($header)
       ->setFooter(array(
-        $warning,
+        $guidance,
         $list,
       ));
 
@@ -180,14 +134,4 @@ final class PhabricatorAuthListController
       ->appendChild($view);
   }
 
-  private function renderConfigLink($key) {
-    return phutil_tag(
-      'a',
-      array(
-        'href' => '/config/edit/'.$key.'/',
-        'target' => '_blank',
-      ),
-      $key);
-  }
-
 }
diff --git a/src/applications/auth/guidance/PhabricatorAuthProvidersGuidanceContext.php b/src/applications/auth/guidance/PhabricatorAuthProvidersGuidanceContext.php
new file mode 100644
index 0000000000..1302846ec3
--- /dev/null
+++ b/src/applications/auth/guidance/PhabricatorAuthProvidersGuidanceContext.php
@@ -0,0 +1,4 @@
+<?php
+
+final class PhabricatorAuthProvidersGuidanceContext
+  extends PhabricatorGuidanceContext {}
diff --git a/src/applications/auth/guidance/PhabricatorAuthProvidersGuidanceEngineExtension.php b/src/applications/auth/guidance/PhabricatorAuthProvidersGuidanceEngineExtension.php
new file mode 100644
index 0000000000..ac3fe4d309
--- /dev/null
+++ b/src/applications/auth/guidance/PhabricatorAuthProvidersGuidanceEngineExtension.php
@@ -0,0 +1,88 @@
+<?php
+
+final class PhabricatorAuthProvidersGuidanceEngineExtension
+  extends PhabricatorGuidanceEngineExtension {
+
+  const GUIDANCEKEY = 'core.auth.providers';
+
+  public function canGenerateGuidance(PhabricatorGuidanceContext $context) {
+    return ($context instanceof PhabricatorAuthProvidersGuidanceContext);
+  }
+
+  public function generateGuidance(PhabricatorGuidanceContext $context) {
+    $domains_key = 'auth.email-domains';
+    $domains_link = $this->renderConfigLink($domains_key);
+    $domains_value = PhabricatorEnv::getEnvConfig($domains_key);
+
+    $approval_key = 'auth.require-approval';
+    $approval_link = $this->renderConfigLink($approval_key);
+    $approval_value = PhabricatorEnv::getEnvConfig($approval_key);
+
+    $results = array();
+
+    if ($domains_value) {
+      $message = pht(
+        'Phabricator is configured with an email domain whitelist (in %s), so '.
+        'only users with a verified email address at one of these %s '.
+        'allowed domain(s) will be able to register an account: %s',
+        $domains_link,
+        phutil_count($domains_value),
+        phutil_tag('strong', array(), implode(', ', $domains_value)));
+
+      $results[] = $this->newGuidance('core.auth.email-domains.on')
+        ->setMessage($message);
+    } else {
+      $message = pht(
+        'Anyone who can browse to this Phabricator install will be able to '.
+        'register an account. To add email domain restrictions, configure '.
+        '%s.',
+        $domains_link);
+
+      $results[] = $this->newGuidance('core.auth.email-domains.off')
+        ->setMessage($message);
+    }
+
+    if ($approval_value) {
+      $message = pht(
+        'Administrative approvals are enabled (in %s), so all new users must '.
+        'have their accounts approved by an administrator.',
+        $approval_link);
+
+      $results[] = $this->newGuidance('core.auth.require-approval.on')
+        ->setMessage($message);
+    } else {
+      $message = pht(
+        'Administrative approvals are disabled, so users who register will '.
+        'be able to use their accounts immediately. To enable approvals, '.
+        'configure %s.',
+        $approval_link);
+
+      $results[] = $this->newGuidance('core.auth.require-approval.off')
+        ->setMessage($message);
+    }
+
+    if (!$domains_value && !$approval_value) {
+      $message = pht(
+        'You can safely ignore these warnings if the install itself has '.
+        'access controls (for example, it is deployed on a VPN) or if all of '.
+        'the configured providers have access controls (for example, they are '.
+        'all private LDAP or OAuth servers).');
+
+      $results[] = $this->newWarning('core.auth.warning')
+        ->setMessage($message);
+    }
+
+    return $results;
+  }
+
+  private function renderConfigLink($key) {
+    return phutil_tag(
+      'a',
+      array(
+        'href' => '/config/edit/'.$key.'/',
+        'target' => '_blank',
+      ),
+      $key);
+  }
+
+}
diff --git a/src/applications/guides/guidance/PhabricatorGuidanceContext.php b/src/applications/guides/guidance/PhabricatorGuidanceContext.php
new file mode 100644
index 0000000000..75559fd14f
--- /dev/null
+++ b/src/applications/guides/guidance/PhabricatorGuidanceContext.php
@@ -0,0 +1,4 @@
+<?php
+
+abstract class PhabricatorGuidanceContext
+  extends Phobject {}
diff --git a/src/applications/guides/guidance/PhabricatorGuidanceEngine.php b/src/applications/guides/guidance/PhabricatorGuidanceEngine.php
new file mode 100644
index 0000000000..2b12402ce7
--- /dev/null
+++ b/src/applications/guides/guidance/PhabricatorGuidanceEngine.php
@@ -0,0 +1,96 @@
+<?php
+
+final class PhabricatorGuidanceEngine
+  extends Phobject {
+
+  private $viewer;
+  private $guidanceContext;
+
+  public function setGuidanceContext(
+    PhabricatorGuidanceContext $guidance_context) {
+    $this->guidanceContext = $guidance_context;
+    return $this;
+  }
+
+  public function getGuidanceContext() {
+    return $this->guidanceContext;
+  }
+
+  public function setViewer(PhabricatorUser $viewer) {
+    $this->viewer = $viewer;
+    return $this;
+  }
+
+  public function getViewer() {
+    return $this->viewer;
+  }
+
+  public function newInfoView() {
+    $extensions = PhabricatorGuidanceEngineExtension::getAllExtensions();
+    $context = $this->getGuidanceContext();
+
+    $keep = array();
+    foreach ($extensions as $key => $extension) {
+      if (!$extension->canGenerateGuidance($context)) {
+        continue;
+      }
+      $keep[$key] = id(clone $extension);
+    }
+
+    $guidance_map = array();
+    foreach ($keep as $extension) {
+      $guidance_list = $extension->generateGuidance($context);
+      foreach ($guidance_list as $guidance) {
+        $key = $guidance->getKey();
+
+        if (isset($guidance_map[$key])) {
+          throw new Exception(
+            pht(
+              'Two guidance extensions generated guidance with the same '.
+              'key ("%s"). Each piece of guidance must have a unique key.',
+              $key));
+        }
+
+        $guidance_map[$key] = $guidance;
+      }
+    }
+
+    foreach ($keep as $extension) {
+      $guidance_map = $extension->didGenerateGuidance($context, $guidance_map);
+    }
+
+    if (!$guidance_map) {
+      return null;
+    }
+
+    $guidance_map = msortv($guidance_map, 'getSortVector');
+
+    $severity = PhabricatorGuidanceMessage::SEVERITY_NOTICE;
+    $strength = null;
+    foreach ($guidance_map as $guidance) {
+      if ($strength !== null) {
+        if ($guidance->getSeverityStrength() <= $strength) {
+          continue;
+        }
+      }
+
+      $strength = $guidance->getSeverityStrength();
+      $severity = $guidance->getSeverity();
+    }
+
+    $severity_map = array(
+      PhabricatorGuidanceMessage::SEVERITY_NOTICE
+        => PHUIInfoView::SEVERITY_NOTICE,
+      PhabricatorGuidanceMessage::SEVERITY_WARNING
+        => PHUIInfoView::SEVERITY_WARNING,
+    );
+
+    $messages = mpull($guidance_map, 'getMessage', 'getKey');
+
+    return id(new PHUIInfoView())
+      ->setViewer($this->getViewer())
+      ->setSeverity(idx($severity_map, $severity, $severity))
+      ->setErrors($messages);
+  }
+
+}
diff --git a/src/applications/guides/guidance/PhabricatorGuidanceEngineExtension.php b/src/applications/guides/guidance/PhabricatorGuidanceEngineExtension.php
new file mode 100644
index 0000000000..b552b10b05
--- /dev/null
+++ b/src/applications/guides/guidance/PhabricatorGuidanceEngineExtension.php
@@ -0,0 +1,39 @@
+<?php
+
+abstract class PhabricatorGuidanceEngineExtension
+  extends Phobject {
+
+  final public function getExtensionKey() {
+    return $this->getPhobjectClassConstant('GUIDANCEKEY', 64);
+  }
+
+  abstract public function canGenerateGuidance(
+    PhabricatorGuidanceContext $context);
+
+  abstract public function generateGuidance(
+    PhabricatorGuidanceContext $context);
+
+  public function didGenerateGuidance(
+    PhabricatorGuidanceContext $context,
+    array $guidance) {
+    return $guidance;
+  }
+
+  final protected function newGuidance($key) {
+    return id(new PhabricatorGuidanceMessage())
+      ->setKey($key);
+  }
+
+  final protected function newWarning($key) {
+    return $this->newGuidance($key)
+      ->setSeverity(PhabricatorGuidanceMessage::SEVERITY_WARNING);
+  }
+
+  final public static function getAllExtensions() {
+    return id(new PhutilClassMapQuery())
+      ->setAncestorClass(__CLASS__)
+      ->setUniqueMethod('getExtensionKey')
+      ->execute();
+  }
+
+}
diff --git a/src/applications/guides/guidance/PhabricatorGuidanceMessage.php b/src/applications/guides/guidance/PhabricatorGuidanceMessage.php
new file mode 100644
index 0000000000..d2720c1602
--- /dev/null
+++ b/src/applications/guides/guidance/PhabricatorGuidanceMessage.php
@@ -0,0 +1,65 @@
+<?php
+
+final class PhabricatorGuidanceMessage
+  extends Phobject {
+
+  private $key;
+  private $message;
+  private $severity = self::SEVERITY_NOTICE;
+  private $priority = 1000;
+
+  const SEVERITY_NOTICE = 'notice';
+  const SEVERITY_WARNING = 'warning';
+
+  public function setSeverity($severity) {
+    $this->severity = $severity;
+    return $this;
+  }
+
+  public function getSeverity() {
+    return $this->severity;
+  }
+
+  public function setKey($key) {
+    $this->key = $key;
+    return $this;
+  }
+
+  public function getKey() {
+    return $this->key;
+  }
+
+  public function setMessage($message) {
+    $this->message = $message;
+    return $this;
+  }
+
+  public function getMessage() {
+    return $this->message;
+  }
+
+  public function getSortVector() {
+    return id(new PhutilSortVector())
+      ->addInt($this->getPriority());
+  }
+
+  public function setPriority($priority) {
+    $this->priority = $priority;
+    return $this;
+  }
+
+  public function getPriority() {
+    return $this->priority;
+  }
+
+  public function getSeverityStrength() {
+    $map = array(
+      self::SEVERITY_NOTICE => 1,
+      self::SEVERITY_WARNING => 2,
+    );
+
+    return idx($map, $this->getSeverity(), 0);
+  }
+
+
+}
diff --git a/src/applications/people/controller/PhabricatorPeopleCreateController.php b/src/applications/people/controller/PhabricatorPeopleCreateController.php
index 82a27e2f9e..04b2f4a8a4 100644
--- a/src/applications/people/controller/PhabricatorPeopleCreateController.php
+++ b/src/applications/people/controller/PhabricatorPeopleCreateController.php
@@ -101,9 +101,20 @@ final class PhabricatorPeopleCreateController
       ->setBackground(PHUIObjectBoxView::BLUE_PROPERTY)
       ->setForm($form);
 
+    $guidance_context = new PhabricatorPeopleCreateGuidanceContext();
+
+    $guidance = id(new PhabricatorGuidanceEngine())
+      ->setViewer($admin)
+      ->setGuidanceContext($guidance_context)
+      ->newInfoView();
+
     $view = id(new PHUITwoColumnView())
       ->setHeader($header)
-      ->setFooter($box);
+      ->setFooter(
+        array(
+          $guidance,
+          $box,
+        ));
 
     return $this->newPage()
       ->setTitle($title)
diff --git a/src/applications/people/guidance/PhabricatorPeopleCreateGuidanceContext.php b/src/applications/people/guidance/PhabricatorPeopleCreateGuidanceContext.php
new file mode 100644
index 0000000000..9740f5b4df
--- /dev/null
+++ b/src/applications/people/guidance/PhabricatorPeopleCreateGuidanceContext.php
@@ -0,0 +1,4 @@
+<?php
+
+final class PhabricatorPeopleCreateGuidanceContext
+  extends PhabricatorGuidanceContext {}
diff --git a/src/view/form/PHUIInfoView.php b/src/view/form/PHUIInfoView.php
index de93eeb65f..ca01ff294b 100644
--- a/src/view/form/PHUIInfoView.php
+++ b/src/view/form/PHUIInfoView.php
@@ -130,7 +130,7 @@ final class PHUIInfoView extends AphrontTagView {
         ),
         $list);
     } else if (count($errors) == 1) {
-      $list = $this->errors[0];
+      $list = head($this->errors);
     } else {
       $list = null;
     }