diff --git a/TODO.org b/TODO.org
index 58fca022..be2ac12c 100644
--- a/TODO.org
+++ b/TODO.org
@@ -10,6 +10,11 @@ pointing at it. A CANCELLED entry carries the one-line reason, because an idea
 rejected without a record is an idea that gets re-proposed.
 
 * Language surface
+** WAIT A cheap front for dyn sequences
+Decided 2026-09-26 (128) to pause: dyn vectors are mutable, so taking from the front
+shifts every element. Options were a linked list (cons/first/rest) or storing the dyn
+vector as a ring buffer with a cheap read-only rest view; the ring buffer was
+recommended. Waits on a program that needs it.
 ** NEXT A typed char
 Decided 2026-09-26 (127): =char= is a typed code point. A char literal is typed by local
 inference like a number literal: u8 or i32 where typed code wants a number (a literal