diff --git a/agents/ludwig/work/queue-286/BUILD.md b/agents/ludwig/work/queue-286/BUILD.md
index e214deaae..b49b12088 100644
--- a/agents/ludwig/work/queue-286/BUILD.md
+++ b/agents/ludwig/work/queue-286/BUILD.md
@@ -88,6 +88,9 @@ for hash pins and path reads on both files and check them against every in-revie
   My recommendation: `humanCredential(context, {user})` takes her login as a parameter, so this row adds no
   mapping field. The row that adds the save, C2-02 or C2-11a with `editor`, names the field. That
   needs a mapping schema change, which is Sage's call.
+  Ruled sage-2925: accepted. `humanCredential(context, {user})` refuses `library-human-missing` before
+  any git call when the slot is missing or bad or `user` is missing. This row adds no mapping field.
+  Row 283 (C2-01d) adds an optional `editor.user`, and row 288 (C2-02) passes it in.
 - Q4 (original). Her Gitea user for `library-human`. The entry's `user` (`mapping.mjs:52`) is today the sync
   user, the bot's. The design names `editor {name, email}` (C2-11a) but no Gitea login. My
   recommendation: the entry's `user` becomes her Gitea login, used only with slot `library-human`. The