diff --git a/src/ref/ArcanistRevisionRef.php b/src/ref/ArcanistRevisionRef.php
--- a/src/ref/ArcanistRevisionRef.php
+++ b/src/ref/ArcanistRevisionRef.php
@@ -56,6 +56,10 @@
     return idx($this->parameters, 'title');
   }
 
+  public function getAuthorPHID() {
+    return idx($this->parameters, 'authorPHID');
+  }
+
   public function addSource(ArcanistRevisionRefSource $source) {
     $this->sources[] = $source;
     return $this;
diff --git a/src/repository/api/ArcanistGitAPI.php b/src/repository/api/ArcanistGitAPI.php
--- a/src/repository/api/ArcanistGitAPI.php
+++ b/src/repository/api/ArcanistGitAPI.php
@@ -1053,19 +1053,22 @@
     return $refs;
   }
 
+  public function getBaseCommitRef() {
+    $base_commit = $this->getSourceControlBaseRevision();
+    $base_message = $this->getCommitMessage($base_commit);
+
+    // TODO: We should also pull the tree hash.
+
+    return $this->newCommitRef()
+      ->setCommitHash($base_commit)
+      ->attachMessage($base_message);
+  }
+
   public function getWorkingCopyRevision() {
     list($stdout) = $this->execxLocal('rev-parse HEAD');
     return rtrim($stdout, "\n");
   }
 
-  public function getUnderlyingWorkingCopyRevision() {
-    list($err, $stdout) = $this->execManualLocal('svn find-rev HEAD');
-    if (!$err && $stdout) {
-      return rtrim($stdout, "\n");
-    }
-    return $this->getWorkingCopyRevision();
-  }
-
   public function isHistoryDefaultImmutable() {
     return false;
   }
diff --git a/src/repository/api/ArcanistRepositoryAPI.php b/src/repository/api/ArcanistRepositoryAPI.php
--- a/src/repository/api/ArcanistRepositoryAPI.php
+++ b/src/repository/api/ArcanistRepositoryAPI.php
@@ -343,11 +343,6 @@
     array $query);
   abstract public function getRemoteURI();
 
-
-  public function getUnderlyingWorkingCopyRevision() {
-    return $this->getWorkingCopyRevision();
-  }
-
   public function getChangedFiles($since_commit) {
     throw new ArcanistCapabilityNotSupportedException($this);
   }
@@ -379,6 +374,10 @@
     throw new ArcanistCapabilityNotSupportedException($this);
   }
 
+  public function getBaseCommitRef() {
+    throw new ArcanistCapabilityNotSupportedException($this);
+  }
+
   public function hasLocalCommit($commit) {
     throw new ArcanistCapabilityNotSupportedException($this);
   }
diff --git a/src/workflow/ArcanistDiffWorkflow.php b/src/workflow/ArcanistDiffWorkflow.php
--- a/src/workflow/ArcanistDiffWorkflow.php
+++ b/src/workflow/ArcanistDiffWorkflow.php
@@ -393,16 +393,6 @@
         ),
         'supports' => array('git', 'hg'),
       ),
-      'cache' => array(
-        'param' => 'bool',
-        'help' => pht(
-          '%d to disable lint cache, %d to enable (default).',
-          0,
-          1),
-        'passthru' => array(
-          'lint' => true,
-        ),
-      ),
       'coverage' => array(
         'help' => pht('Always enable coverage information.'),
         'conflicts' => array(
@@ -1950,6 +1940,15 @@
       $faux_message[] = pht('CC: %s', $this->getArgument('cc'));
     }
 
+    // NOTE: For now, this isn't a real field, so it just ends up as the first
+    // part of the summary.
+    $depends_ref = $this->getDependsOnRevisionRef();
+    if ($depends_ref) {
+      $faux_message[] = pht(
+        'Depends on %s. ',
+        $depends_ref->getMonogram());
+    }
+
     // See T12069. After T10312, the first line of a message is always parsed
     // as a title. Add a placeholder so "Reviewers" and "CC" are never the
     // first line.
@@ -2904,4 +2903,45 @@
     }
   }
 
+  private function getDependsOnRevisionRef() {
+    $api = $this->getRepositoryAPI();
+    $base_ref = $api->getBaseCommitRef();
+
+    $state_ref = $this->newWorkingCopyStateRef()
+      ->setCommitRef($base_ref);
+
+    $this->newRefQuery(array($state_ref))
+      ->needHardpoints(
+        array(
+          'revisionRefs',
+        ))
+      ->execute();
+
+    $revision_refs = $state_ref->getRevisionRefs();
+    $viewer_phid = $this->getUserPHID();
+
+    foreach ($revision_refs as $key => $revision_ref) {
+      // Don't automatically depend on closed revisions.
+      if ($revision_ref->isClosed()) {
+        unset($revision_refs[$key]);
+        continue;
+      }
+
+      // Don't automatically depend on revisions authored by other users.
+      if ($revision_ref->getAuthorPHID() != $viewer_phid) {
+        continue;
+      }
+    }
+
+    if (!$revision_refs) {
+      return null;
+    }
+
+    if (count($revision_refs) > 1) {
+      return null;
+    }
+
+    return head($revision_refs);
+  }
+
 }
diff --git a/src/workflow/ArcanistLintWorkflow.php b/src/workflow/ArcanistLintWorkflow.php
--- a/src/workflow/ArcanistLintWorkflow.php
+++ b/src/workflow/ArcanistLintWorkflow.php
@@ -201,7 +201,7 @@
     // This is used so that the lint engine can drop warning messages
     // concerning lines that weren't in the change.
     $engine->setPaths($paths);
-    if ($lint_all) {
+    if (!$lint_all) {
       foreach ($paths as $path) {
         // Note that getChangedLines() returns null to indicate that a file
         // is binary or a directory (i.e., changed lines are not relevant).