diff --git a/TODO.org b/TODO.org
index cabf10f2..4074d1ef 100644
--- a/TODO.org
+++ b/TODO.org
@@ -1548,6 +1548,10 @@ are a dyn vector, except numbers with no common type, which are refused. Rules
 out the first element typing the rest.
 
 * Dev loop
+** TODO --dev bookkeeping per temp allocation grows without free-temp
+Under --dev each temp allocation (i64->bytes, dyn text crossing into str) costs about
+340 bytes of registry notes until free-temp; a loop passing dyn text as str 4M times
+without free-temp reaches 2.7 GB. Release stays flat. A CLI that never frees temp hits it.
 
 ** WAIT A _ caller whose type follows a redefined callee
 Its signature changes in the session but its body is not recompiled, so every call