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
@@ -821,6 +821,7 @@
     'DiffusionPreCommitRefRepositoryHeraldField' => 'applications/diffusion/herald/DiffusionPreCommitRefRepositoryHeraldField.php',
     'DiffusionPreCommitRefRepositoryProjectsHeraldField' => 'applications/diffusion/herald/DiffusionPreCommitRefRepositoryProjectsHeraldField.php',
     'DiffusionPreCommitRefTypeHeraldField' => 'applications/diffusion/herald/DiffusionPreCommitRefTypeHeraldField.php',
+    'DiffusionPreCommitUsesGitLFSHeraldField' => 'applications/diffusion/herald/DiffusionPreCommitUsesGitLFSHeraldField.php',
     'DiffusionPullEventGarbageCollector' => 'applications/diffusion/garbagecollector/DiffusionPullEventGarbageCollector.php',
     'DiffusionPushCapability' => 'applications/diffusion/capability/DiffusionPushCapability.php',
     'DiffusionPushEventViewController' => 'applications/diffusion/controller/DiffusionPushEventViewController.php',
@@ -5881,6 +5882,7 @@
     'DiffusionPreCommitRefRepositoryHeraldField' => 'DiffusionPreCommitRefHeraldField',
     'DiffusionPreCommitRefRepositoryProjectsHeraldField' => 'DiffusionPreCommitRefHeraldField',
     'DiffusionPreCommitRefTypeHeraldField' => 'DiffusionPreCommitRefHeraldField',
+    'DiffusionPreCommitUsesGitLFSHeraldField' => 'DiffusionPreCommitContentHeraldField',
     'DiffusionPullEventGarbageCollector' => 'PhabricatorGarbageCollector',
     'DiffusionPushCapability' => 'PhabricatorPolicyCapability',
     'DiffusionPushEventViewController' => 'DiffusionPushLogController',
diff --git a/src/applications/diffusion/herald/DiffusionPreCommitUsesGitLFSHeraldField.php b/src/applications/diffusion/herald/DiffusionPreCommitUsesGitLFSHeraldField.php
new file mode 100644
--- /dev/null
+++ b/src/applications/diffusion/herald/DiffusionPreCommitUsesGitLFSHeraldField.php
@@ -0,0 +1,41 @@
+<?php
+
+final class DiffusionPreCommitUsesGitLFSHeraldField
+  extends DiffusionPreCommitContentHeraldField {
+
+  const FIELDCONST = 'diffusion.pre.commit.git-lfs';
+
+  public function getHeraldFieldName() {
+    return pht('Commit uses Git LFS');
+  }
+
+  public function getFieldGroupKey() {
+    return DiffusionChangeHeraldFieldGroup::FIELDGROUPKEY;
+  }
+
+  public function getHeraldFieldValue($object) {
+    $map = $this->getAdapter()->getDiffContent('+');
+
+    // At the time of writing, all current Git LFS files begin with this
+    // line, verbatim:
+    //
+    //   version https://git-lfs.github.com/spec/v1
+    //
+    // ...but we don't try to match the specific version here, in the hopes
+    // that this might also detect future versions.
+    $pattern = '(^version\s*https://git-lfs.github.com/spec/)i';
+
+    foreach ($map as $path => $content) {
+      if (preg_match($pattern, $content)) {
+        return true;
+      }
+    }
+
+    return false;
+  }
+
+  protected function getHeraldFieldStandardType() {
+    return self::STANDARD_BOOL;
+  }
+
+}