diff --git a/lib/log/log.ww b/lib/log/log.ww
index 8c1f6e01..000526bc 100644
--- a/lib/log/log.ww
+++ b/lib/log/log.ww
@@ -37,10 +37,11 @@
 //     some lib/log fn first so init runs.
 //
 //   • Param name divergence from Hare: the format-string parameter is
-//     `format` (not Hare's `fmt`) because ww's resolver shadows the
-//     `fmt` module reference inside a body when a same-name param is
-//     in scope (silent miscompile — CALL through str.ptr). Tracked as
-//     task #19; rename to `fmt` when fixed.
+//     `format` (Hare's is `fmt`). Permanent — #19 refuses any
+//     let/param that shadows an imported module name, regardless of
+//     body usage. ww chose `.` for both module-access and field-
+//     access, so `use fmt; fn x(fmt: T)` is structurally ambiguous;
+//     the resolver refuses it at decl.
 //
 // Sink today is [[io.stream]] only — lib/io has no fd-backed stream
 // yet (Hare's `io::handle = file | int` collapses to one variant).