diff --git a/src/applications/herald/adapter/HeraldAdapter.php b/src/applications/herald/adapter/HeraldAdapter.php
--- a/src/applications/herald/adapter/HeraldAdapter.php
+++ b/src/applications/herald/adapter/HeraldAdapter.php
@@ -44,6 +44,12 @@
   const FIELD_ARCANIST_PROJECT       = 'arcanist-project';
   const FIELD_PUSHER_IS_COMMITTER    = 'pusher-is-committer';
   const FIELD_PATH                   = 'path';
+  const FIELD_ARC_HAS_NO_UNIT_TESTS  = 'no-unit-tests';
+  const FIELD_ARC_UNIT_TESTS_SKIPPED = 'unit-tests-skipped';
+  const FIELD_ARC_LINT_SKIPPED       = 'lint-skipped';
+  const FIELD_DIFF_LINES             = 'diff-lines';
+  const FIELD_DIFF_ADDED_LINES       = 'diff-added-lines';
+  const FIELD_DIFF_REMOVED_LINES     = 'diff-removed-lines';
 
   const CONDITION_CONTAINS        = 'contains';
   const CONDITION_NOT_CONTAINS    = '!contains';
@@ -68,6 +74,12 @@
   const CONDITION_NOT_BIT         = '!bit';
   const CONDITION_IS_TRUE         = 'true';
   const CONDITION_IS_FALSE        = 'false';
+  const CONDITION_LESS_THAN       = 'less';
+  const CONDITION_GREATER_THAN    = '!lesseq';
+  const CONDITION_LESS_EQUAL      = 'lesseq';
+  const CONDITION_GREATER_EQUAL   = '!less';
+  const CONDITION_EQUAL           = 'eq';
+  const CONDITION_NOT_EQUAL       = '!eq';
 
   const ACTION_ADD_CC       = 'addcc';
   const ACTION_REMOVE_CC    = 'remcc';
@@ -317,6 +329,12 @@
       self::FIELD_ARCANIST_PROJECT => pht('Arcanist Project'),
       self::FIELD_PUSHER_IS_COMMITTER => pht('Pusher same as committer'),
       self::FIELD_PATH => pht('Path'),
+      self::FIELD_ARC_HAS_NO_UNIT_TESTS => pht('No unit tests ran on arc diff'),
+      self::FIELD_ARC_UNIT_TESTS_SKIPPED => pht('Unit tests were skipped on arc diff'),
+      self::FIELD_ARC_LINT_SKIPPED => pht('Lint was skipped on arc diff'),
+      self::FIELD_DIFF_LINES => pht('Number of lines'),
+      self::FIELD_DIFF_ADDED_LINES => pht('Number of added lines'),
+      self::FIELD_DIFF_REMOVED_LINES => pht('Number of removed lines'),
     ) + $this->getCustomFieldNameMap();
   }
 
@@ -349,6 +367,12 @@
       self::CONDITION_REGEXP_PAIR     => pht('matches regexp pair'),
       self::CONDITION_HAS_BIT         => pht('has bit'),
       self::CONDITION_NOT_BIT         => pht('lacks bit'),
+      self::CONDITION_LESS_THAN       => pht('less than'),
+      self::CONDITION_LESS_EQUAL      => pht('less than or equal to'),
+      self::CONDITION_GREATER_THAN    => pht('greater than'),
+      self::CONDITION_GREATER_EQUAL   => pht('greater than or equal to'),
+      self::CONDITION_EQUAL           => pht('equal to'),
+      self::CONDITION_NOT_EQUAL       => pht('not equal to'),
     );
   }
 
@@ -453,10 +477,24 @@
       case self::FIELD_DIFF_ENORMOUS:
       case self::FIELD_IS_NEW_OBJECT:
       case self::FIELD_PUSHER_IS_COMMITTER:
+      case self::FIELD_ARC_HAS_NO_UNIT_TESTS:
+      case self::FIELD_ARC_UNIT_TESTS_SKIPPED:
+      case self::FIELD_ARC_LINT_SKIPPED:
         return array(
           self::CONDITION_IS_TRUE,
           self::CONDITION_IS_FALSE,
         );
+      case self::FIELD_DIFF_LINES:
+      case self::FIELD_DIFF_ADDED_LINES:
+      case self::FIELD_DIFF_REMOVED_LINES:
+        return array(
+          self::CONDITION_LESS_THAN,
+          self::CONDITION_GREATER_THAN,
+          self::CONDITION_LESS_EQUAL,
+          self::CONDITION_GREATER_EQUAL,
+          self::CONDITION_EQUAL,
+          self::CONDITION_NOT_EQUAL,
+        );
       default:
         if ($this->isHeraldCustomKey($field)) {
           return $this->getCustomFieldConditions($field);
@@ -488,9 +526,19 @@
       case self::CONDITION_NOT_CONTAINS:
         return (stripos($field_value, $condition_value) === false);
       case self::CONDITION_IS:
+      case self::CONDITION_EQUAL:
         return ($field_value == $condition_value);
       case self::CONDITION_IS_NOT:
+      case self::CONDITION_NOT_EQUAL:
         return ($field_value != $condition_value);
+      case self::CONDITION_LESS_THAN:
+        return ($field_value < $condition_value);
+      case self::CONDITION_LESS_EQUAL:
+        return ($field_value <= $condition_value);
+      case self::CONDITION_GREATER_THAN:
+        return ($field_value > $condition_value);
+      case self::CONDITION_GREATER_EQUAL:
+        return ($field_value >= $condition_value);
       case self::CONDITION_IS_ME:
         return ($field_value == $rule->getAuthorPHID());
       case self::CONDITION_IS_NOT_ME:
@@ -690,6 +738,12 @@
       case self::CONDITION_NOT_BIT:
       case self::CONDITION_IS_TRUE:
       case self::CONDITION_IS_FALSE:
+      case self::CONDITION_LESS_THAN:
+      case self::CONDITION_LESS_EQUAL:
+      case self::CONDITION_GREATER_THAN:
+      case self::CONDITION_GREATER_EQUAL:
+      case self::CONDITION_EQUAL:
+      case self::CONDITION_NOT_EQUAL:
         // No explicit validation for these types, although there probably
         // should be in some cases.
         break;
@@ -830,6 +884,12 @@
       case self::CONDITION_NOT_CONTAINS:
       case self::CONDITION_REGEXP:
       case self::CONDITION_REGEXP_PAIR:
+      case self::CONDITION_LESS_THAN:
+      case self::CONDITION_GREATER_THAN:
+      case self::CONDITION_LESS_EQUAL:
+      case self::CONDITION_GREATER_EQUAL:
+      case self::CONDITION_EQUAL:
+      case self::CONDITION_NOT_EQUAL:
         return self::VALUE_TEXT;
       case self::CONDITION_IS:
       case self::CONDITION_IS_NOT:
diff --git a/src/applications/herald/adapter/HeraldDifferentialAdapter.php b/src/applications/herald/adapter/HeraldDifferentialAdapter.php
--- a/src/applications/herald/adapter/HeraldDifferentialAdapter.php
+++ b/src/applications/herald/adapter/HeraldDifferentialAdapter.php
@@ -62,6 +62,14 @@
     return $changeset->getAbsoluteRepositoryPath($repository, $diff);
   }
 
+  protected function countDictionary(array $dict) {
+    $lines = 0;
+    foreach ($dict as $path => $content) {
+      $lines += count(phutil_split_lines($content));
+    }
+    return $lines;
+  }
+
   protected function loadContentDictionary() {
     $add_lines = DifferentialHunk::FLAG_LINES_ADDED;
     $rem_lines = DifferentialHunk::FLAG_LINES_REMOVED;
diff --git a/src/applications/herald/adapter/HeraldDifferentialDiffAdapter.php b/src/applications/herald/adapter/HeraldDifferentialDiffAdapter.php
--- a/src/applications/herald/adapter/HeraldDifferentialDiffAdapter.php
+++ b/src/applications/herald/adapter/HeraldDifferentialDiffAdapter.php
@@ -56,6 +56,12 @@
         self::FIELD_DIFF_CONTENT,
         self::FIELD_DIFF_ADDED_CONTENT,
         self::FIELD_DIFF_REMOVED_CONTENT,
+        self::FIELD_ARC_HAS_NO_UNIT_TESTS,
+        self::FIELD_ARC_UNIT_TESTS_SKIPPED,
+        self::FIELD_ARC_LINT_SKIPPED,
+        self::FIELD_DIFF_LINES,
+        self::FIELD_DIFF_ADDED_LINES,
+        self::FIELD_DIFF_REMOVED_LINES,
       ),
       parent::getFields());
   }
@@ -117,6 +123,31 @@
         return $this->loadAddedContentDictionary();
       case self::FIELD_DIFF_REMOVED_CONTENT:
         return $this->loadRemovedContentDictionary();
+      case self::FIELD_ARC_HAS_NO_UNIT_TESTS:
+        $load_props = id(new DifferentialDiffProperty())->loadAllWhere(
+          'diffID = %d AND name = %s',
+          $this->getDiff()->getID(),
+          'arc:unit');
+        $load_props = mpull($load_props, 'getData', 'getName');
+        $this->getDiff()->attachProperty('arc:unit', idx($load_props, 'arc:unit'));
+
+        return
+          ($this->getDiff()->getUnitStatus() == DifferentialUnitStatus::UNIT_NONE) ||
+          ($this->getDiff()->getProperty('arc:unit') === null) ||
+          (count($this->getDiff()->getProperty('arc:unit')) == 0);
+      case self::FIELD_ARC_UNIT_TESTS_SKIPPED:
+        return $this->getDiff()->getUnitStatus() == DifferentialUnitStatus::UNIT_SKIP;
+      case self::FIELD_ARC_LINT_SKIPPED:
+        return $this->getDiff()->getLintStatus() == DifferentialLintStatus::LINT_SKIP;
+      case self::FIELD_DIFF_LINES:
+        return $this->countDictionary(
+          $this->loadContentDictionary());
+      case self::FIELD_DIFF_ADDED_LINES:
+        return $this->countDictionary(
+          $this->loadAddedContentDictionary());
+      case self::FIELD_DIFF_REMOVED_LINES:
+        return $this->countDictionary(
+          $this->loadRemovedContentDictionary());
     }
 
     return parent::getHeraldField($field);
diff --git a/src/applications/herald/adapter/HeraldDifferentialRevisionAdapter.php b/src/applications/herald/adapter/HeraldDifferentialRevisionAdapter.php
--- a/src/applications/herald/adapter/HeraldDifferentialRevisionAdapter.php
+++ b/src/applications/herald/adapter/HeraldDifferentialRevisionAdapter.php
@@ -78,6 +78,12 @@
         self::FIELD_AFFECTED_PACKAGE_OWNER,
         self::FIELD_IS_NEW_OBJECT,
         self::FIELD_ARCANIST_PROJECT,
+        self::FIELD_ARC_HAS_NO_UNIT_TESTS,
+        self::FIELD_ARC_UNIT_TESTS_SKIPPED,
+        self::FIELD_ARC_LINT_SKIPPED,
+        self::FIELD_DIFF_LINES,
+        self::FIELD_DIFF_ADDED_LINES,
+        self::FIELD_DIFF_REMOVED_LINES,
       ),
       parent::getFields());
   }
@@ -262,6 +268,31 @@
           mpull($packages, 'getID'));
       case self::FIELD_ARCANIST_PROJECT:
         return $this->revision->getArcanistProjectPHID();
+      case self::FIELD_ARC_HAS_NO_UNIT_TESTS:
+        $load_props = id(new DifferentialDiffProperty())->loadAllWhere(
+          'diffID = %d AND name = %s',
+          $this->getDiff()->getID(),
+          'arc:unit');
+        $load_props = mpull($load_props, 'getData', 'getName');
+        $this->getDiff()->attachProperty('arc:unit', idx($load_props, 'arc:unit'));
+
+        return
+          ($this->getDiff()->getUnitStatus() == DifferentialUnitStatus::UNIT_NONE) ||
+          ($this->getDiff()->getProperty('arc:unit') === null) ||
+          (count($this->getDiff()->getProperty('arc:unit')) == 0);
+      case self::FIELD_ARC_UNIT_TESTS_SKIPPED:
+        return $this->getDiff()->getUnitStatus() == DifferentialUnitStatus::UNIT_SKIP;
+      case self::FIELD_ARC_LINT_SKIPPED:
+        return $this->getDiff()->getLintStatus() == DifferentialLintStatus::LINT_SKIP;
+      case self::FIELD_DIFF_LINES:
+        return $this->countDictionary(
+          $this->loadContentDictionary());
+      case self::FIELD_DIFF_ADDED_LINES:
+        return $this->countDictionary(
+          $this->loadAddedContentDictionary());
+      case self::FIELD_DIFF_REMOVED_LINES:
+        return $this->countDictionary(
+          $this->loadRemovedContentDictionary());
     }
 
     return parent::getHeraldField($field);