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 a0fa67bf..385335f4 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
@@ -171,3 +171,5 @@ the principle that settles it, cited as "design 47 G A-n".
   the bus, not acknowledged; at its start the runner reads, for each run pipeline with no steps yet, its candidate's
   revision through `revision`, so a placing lost while it was down is taken up. A run's rerun asks with the
   candidate's catalog half. An unanswered drop is said `call-unanswered` on a five-minute bound key's expiry.
+- **A-223** (corrects A-221; principle 8) A merged pull request's own branch is `head-branch`; `head` stays the head
+  commit, as everywhere in the forge messages.