X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=lib%2FPublicInbox%2FContentId.pm;h=9baf0e76a3e33c3d32502061c93ceb15b4028e33;hb=a9cab9c477b74b3b828c26aa64e70d88c9d6744c;hp=dd3155befefbd2d628683e6099847e72a34aec5a;hpb=e683624b96fdc2587a2e45895d22b373c8a6413b;p=public-inbox.git

diff --git a/lib/PublicInbox/ContentId.pm b/lib/PublicInbox/ContentId.pm
index dd3155be..9baf0e76 100644
--- a/lib/PublicInbox/ContentId.pm
+++ b/lib/PublicInbox/ContentId.pm
@@ -1,6 +1,11 @@
 # Copyright (C) 2018 all contributors <meta@public-inbox.org>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 
+# Unstable internal API.
+# Used for on-the-fly duplicate detection in V2 inboxes.
+# This is not stored in any database anywhere and may change
+# as changes in duplicate detection are needed.
+# See L<public-inbox-v2-format(5)> manpage for more details.
 package PublicInbox::ContentId;
 use strict;
 use warnings;