Part R: a push also resets the round count

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01J5Utyfzw7gF7UhjRDEtjTk

docs/Architecture.md

@@ -891,9 +891,9 @@ Two agents can argue forever, so a PR's exchanges are capped.
 - **A round** is one review or set of replies the reviewer posts. After a capped
   number of rounds (a tuning value) it posts a summary of what is still open, for
   the operator, and stops answering on that PR.
-- **Anyone else commenting resets the count:** someone other than the reviewer
-  and the PR's agent author (in practice, the operator) has joined the
-  discussion. A push doesn't.
+- **The count resets** when someone other than the reviewer and the PR's agent
+  author comments (in practice, the operator has joined the discussion), and when
+  the PR gets a new push: new code is worth a fresh look.
 
 ### R3. Authority and reach