Answer A-161: the teller's events carry the fields it says

Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h
2026-11-12 09:41:28 +01:00
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@@ -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.