diff --git a/patchset.proto b/patchset.proto
index e00fb1c..8de451d 100644
--- a/patchset.proto
+++ b/patchset.proto
@@ -49,7 +49,7 @@ message Patch {
         string                      state               = 18; // the 'state' of the patch
         string                      filename            = 19; // `autogenpb:unique` `autogenpb:sort`
         string                      startHash           = 20; // the start commit hash
-        string                      commitHash          = 21; // the git commit hash of this patch
+        string                      commitHash          = 21; // the git commit hash of this patch `autogenpb:sort` `autogenpb:unique`
         string                      comment             = 22; // the git commit message (in patch form)
         repeated string             Files               = 23; // the filenames this patch changes
         google.protobuf.Timestamp   ctime               = 24; // create time of the patch