Scale lesson gain by warmth the same way hunger already did.

The bar was live and drove dressing; a frozen pupil in class still learned as if it were May.

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

src/HSchool.Ai/LessonLearning.cs

@@ -3,9 +3,8 @@ using HSchool.Content;
 namespace HSchool.Ai;
 
 /// <summary>
-/// How much a lesson adds to one skill this step. Hungry learns worse; trait offsets and the
-/// teacher's subject skill scale the rate. The world stores the running total — this is just
-/// the number.
+/// How much a lesson adds to one skill this step. Hungry or cold learns worse; trait offsets and
+/// the teacher's subject skill scale the rate. Missing warmth is treated as 1.
 /// </summary>
 public static class LessonLearning
 {
@@ -54,13 +53,15 @@ public static class LessonLearning
         float hours,
         float hunger,
         int traitOffset,
-        float teacherSkill)
+        float teacherSkill,
+        float warmth = 1f)
     {
         ArgumentNullException.ThrowIfNull(skill);
         var delta = share
             * lessonSkillPerHour
             * hours
             * NeedFactor(hunger)
+            * NeedFactor(warmth)
             * TraitFactor(traitOffset)
             * TeacherFactor(teacherSkill);
         return Math.Clamp(current + delta, skill.Range.Min, skill.Range.Max);

src/HSchool.Server/mods/core/localizations/en.jsonc

@@ -192,5 +192,6 @@
   "ApparelReplaced": "got a new {0}",
   "ApparelChanged": "changed clothes: {0}",
   "LessonNoTeacher": "lesson without a teacher: {0}",
+  "LessonCold": "too cold in class: {0}",
   "core": "Core",
 }

src/HSchool.Server/mods/core/localizations/ru.jsonc

@@ -192,5 +192,6 @@
   "ApparelReplaced": "получил новую {0}",
   "ApparelChanged": "переоделся: {0}",
   "LessonNoTeacher": "урок без учителя: {0}",
+  "LessonCold": "замёрз на уроке: {0}",
   "core": "Базовая игра",
 }

src/HSchool.Simulation/LessonLearningSystem.cs

@@ -84,6 +84,12 @@ internal static class LessonLearningSystem
                 }
 
                 var hunger = needs.Values.GetValueOrDefault("Hunger", 1f);
+                var warmth = needs.Values.GetValueOrDefault("Warmth", 1f);
+                if (warmth < rules.NeedThreshold)
+                {
+                    school.TryLogLessonOnce(personId, PersonLogTypes.LessonCold, lesson.Subject);
+                }
+
                 IReadOnlyDictionary<string, float> taught = teacherSkills.TryGetValue(lesson.TeacherId, out var found)
                     ? found
                     : new Dictionary<string, float>(StringComparer.Ordinal);
@@ -108,7 +114,8 @@ internal static class LessonLearningSystem
                         hours,
                         hunger,
                         TraitOffset(catalog, traits, share.Skill),
-                        teacherSkill);
+                        teacherSkill,
+                        warmth);
                 }
             });
     }

src/HSchool.Simulation/PersonLog.cs

@@ -15,6 +15,7 @@ public static class PersonLogTypes
     public const string ApparelReplaced = "apparel-replaced";
     public const string ApparelChanged = "apparel-changed";
     public const string LessonNoTeacher = "lesson-no-teacher";
+    public const string LessonCold = "lesson-cold";
 }
 
 /// <summary>
@@ -59,12 +60,16 @@ public sealed record PersonLogEvent(string PersonId, DateTime Time, string Type,
             return string.Format(CultureInfo.InvariantCulture, catalog.Text(locale, key), name);
         }
 
-        if (Type.Equals(PersonLogTypes.LessonNoTeacher, StringComparison.Ordinal))
+        if (Type.Equals(PersonLogTypes.LessonNoTeacher, StringComparison.Ordinal)
+            || Type.Equals(PersonLogTypes.LessonCold, StringComparison.Ordinal))
         {
             var name = catalog.Subjects.TryGetValue(ThingDef, out var subject)
                 ? catalog.Label(locale, subject)
                 : ThingDef;
-            return string.Format(CultureInfo.InvariantCulture, catalog.Text(locale, "LessonNoTeacher"), name);
+            var key = Type.Equals(PersonLogTypes.LessonCold, StringComparison.Ordinal)
+                ? "LessonCold"
+                : "LessonNoTeacher";
+            return string.Format(CultureInfo.InvariantCulture, catalog.Text(locale, key), name);
         }
 
         return Type;