diff --git a/03-DESIGN/01-to-be/47-milestones/G-22-lead-answers-2.md b/03-DESIGN/01-to-be/47-milestones/G-22-lead-answers-2.md
index fe06dde8..45703dbe 100644
--- a/03-DESIGN/01-to-be/47-milestones/G-22-lead-answers-2.md
+++ b/03-DESIGN/01-to-be/47-milestones/G-22-lead-answers-2.md
@@ -235,3 +235,5 @@ the principle that settles it, cited as "design 47 G A-n".
   `withheld` [{subject, why}] (the module's entry of the grants part's `withheld` for this node) and
   `withheld-unknown`, the words "withheld unknown: the grants part does not answer" when the verb fails; its
   manifest's `uses` gains `mesh-grants` beside the `invokes` of `seat:mesh-grants.withheld` H-21 added.
+- **A-240** (§354, ADR 0596; principle 1) The assigner waits on its composition run's answer by hearing the build
+  seat's `step-ended` for that ask, never by reading the seat's step state.