diff --git a/docs/prd/mosaic-stack.md b/docs/prd/mosaic-stack.md
index 94643cc82..717c66fce 100644
--- a/docs/prd/mosaic-stack.md
+++ b/docs/prd/mosaic-stack.md
@@ -1183,9 +1183,9 @@ library is the user's own writing repository.
 - **REQ-LIB-1.** A library project maps the user's writing repository
   onto universes, books, entity types such as character and place, the
   manuscript, playgrounds and supporting folders. The mapping sits in the
-  organization file
-  and fits the user's own folder layout. Only the human changes it, and
-  an agent's organization write that changes it is refused. So
+  organization file and fits the user's own folder layout. Only the
+  human changes it, and an agent's organization write that changes it
+  is refused. So
   `universe.book.{character,place,...}` reads as universe, book folder,
   type folder. (Design 1.1 and M9. Q176 Case 2 "Data is stored in
   little-endian organizational scheme". Version 1.15: supporting
@@ -1263,7 +1263,9 @@ library is the user's own writing repository.
   Agents talk with the user in free text. A reply may cite lines of the
   repository at a commit or pages the agent fetched, and the broker
   checks every citation before it stores the message. A setting,
-  `requireCitation`, makes every reply carry a citation. Only the human
+  `requireCitation`, makes every reply carry a citation, except the
+  runner's fixed notices for no answer, a failed turn, no answer passing
+  the citation check and an answer too long to send. Only the human
   changes it, and it is off by default. The user sees only stored
   messages, on every channel. (Design 4, 5.2 and the ruling after r11.
   Q223 and Q226. Q180 for Bean and Chet. Q176 Case 2, the agent list,