diff --git a/03-DESIGN/01-to-be/47-milestones/G-20-lead-answers.md b/03-DESIGN/01-to-be/47-milestones/G-20-lead-answers.md
index 7f8165ab..5b6e7a07 100644
--- a/03-DESIGN/01-to-be/47-milestones/G-20-lead-answers.md
+++ b/03-DESIGN/01-to-be/47-milestones/G-20-lead-answers.md
@@ -601,3 +601,6 @@ names the principle that settles it, and is cited as "design 47 G A-n".
   registrations and to the branch's revision view as its trunk; its manifests and fingerprints come from the same
   branch take-in the indexer computes for any commit (its files read through the seat `git`), so no checker preview
   is heard.
+- **A-161** (§522, §81, §170; principle 1) An event carries what its hearers need to say it: `recovery-merged` gains
+  `module` and `branch`, and a forge-made record's `record-opened` gains `repository`, `pull`, `commit` and `branch`,
+  in their contracts and from their emitters; the teller makes no call per message.