Merge branch 'review/slice-9-ab'

Co-authored-by: Cursor <cursoragent@cursor.com>

src/HSchool.Simulation/School.cs

@@ -138,6 +138,12 @@ public sealed class School : IDisposable
 
     internal Dictionary<string, ApologyDebt> ApologyDebts { get; } = new(StringComparer.Ordinal);
 
+    /// <summary>
+    /// A finished or interrupted circle wrote opinions onto the roster. <see cref="Tick"/>
+    /// returns this so the worker persists <c>people.json</c> — same seam as morning dress.
+    /// </summary>
+    internal bool RosterTalkDirty { get; set; }
+
     internal void ResetDayLog()
     {
         _dayLog.Clear();
@@ -400,6 +406,8 @@ public sealed class School : IDisposable
             peopleChanged |= AffinitySystem.Apply(this, talked);
         }
 
+        peopleChanged |= RosterTalkDirty;
+        RosterTalkDirty = false;
         return peopleChanged;
     }