diff --git a/TODO.md b/TODO.md
index 67bbd81..cbafcce 100644
--- a/TODO.md
+++ b/TODO.md
@@ -24,3 +24,6 @@ Make second-and-subsequent subscriptions to remote topics behave the same as fir
  - never do a poll if the poll interval is "none" for the topic as a whole
 
 Local topic history retention and browsing
+
+For topic creation: allow creation of distinct read and write URLs for
+one topic, to allow cap-style control of write- and read-permission.