lib/PublicInbox/LeiCurl.pm     | 2 ++
 lib/PublicInbox/LeiExternal.pm | 3 +++

diff --git a/lib/PublicInbox/LeiCurl.pm b/lib/PublicInbox/LeiCurl.pm
index f346a1b43830661c707c5c23ab1d5c9c56cefd3a..3a79fbf8224b534bbb16ce6d83dc7b14a8eed918 100644
--- a/lib/PublicInbox/LeiCurl.pm
+++ b/lib/PublicInbox/LeiCurl.pm
@@ -2,6 +2,8 @@ # Copyright (C) 2021 all contributors <meta@public-inbox.org>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 
 # common option and torsocks(1) wrapping for curl(1)
+# Eventually, we may support using libcurl via Inline::C and/or
+# WWW::Curl; but curl(1) is most prevalent and widely-installed.
 package PublicInbox::LeiCurl;
 use strict;
 use v5.10.1;
diff --git a/lib/PublicInbox/LeiExternal.pm b/lib/PublicInbox/LeiExternal.pm
index b402eed4524cab6123191638581283ed01f6326c..8a51afcb59a17e789be3af65b2e4d85d7250a48d 100644
--- a/lib/PublicInbox/LeiExternal.pm
+++ b/lib/PublicInbox/LeiExternal.pm
@@ -44,6 +44,8 @@ 		$uri->as_string;
 	}
 }
 
+# TODO: we will probably extract glob2re into a separate module for
+# PublicInbox::Filter::Base and maybe other places
 my %re_map = ( '*' => '[^/]*?', '?' => '[^/]',
 		'[' => '[', ']' => ']', ',' => ',' );
 
@@ -99,6 +101,7 @@ 	}
 	();
 }
 
+# TODO: does this need JSON output?
 sub lei_ls_external {
 	my ($self, $filter) = @_;
 	my $opt = $self->{opt};