Merge phase 26 school seed.

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

src/HSchool.Server/Game/GameCommand.cs

@@ -18,6 +18,7 @@ internal abstract record GameCommand
         MapLayout? Map,
         string? NameSetId,
         string? NativeLanguage,
+        int? Seed,
         TaskCompletionSource<SchoolCreationOutcome> Result) : GameCommand;
 
     internal sealed record DeleteSchool(int SchoolId, TaskCompletionSource<bool> Result) : GameCommand;

src/HSchool.Server/Game/GameLoopService.cs

@@ -378,9 +378,10 @@ internal sealed class GameLoopService(
 
             var id = _nextId++;
             store.WriteNextId(_nextId);
-            var nativeLanguage = NativeLanguages.Pick(names, id, command.NativeLanguage, rollIfOmitted: true);
+            var seed = command.Seed ?? Random.Shared.Next();
+            var nativeLanguage = NativeLanguages.Pick(names, seed, command.NativeLanguage, rollIfOmitted: true);
 
-            var worker = SpawnWorker(id, normalized, command.StartDate, running: true, ClockSpeed.DefaultIndex, isNew: true, packIds, command.Map, nameSetId, nativeLanguage);
+            var worker = SpawnWorker(id, normalized, command.StartDate, running: true, ClockSpeed.DefaultIndex, isNew: true, packIds, command.Map, nameSetId, nativeLanguage, seed);
             Track(worker);
             worker.Start();
 
@@ -402,7 +403,7 @@ internal sealed class GameLoopService(
                 throw;
             }
 
-            logger.LogInformation("School {SchoolId} \"{Name}\" created.", id, normalized);
+            logger.LogInformation("School {SchoolId} \"{Name}\" created with seed {Seed}.", id, normalized, seed);
             command.Result.TrySetResult(new SchoolCreationOutcome(worker.Snapshot, SchoolCreationError.None));
         }
         catch (Exception ex)
@@ -549,6 +550,7 @@ internal sealed class GameLoopService(
                 save.Map,
                 save.NameSetId,
                 save.NativeLanguage,
+                createSeed: null,
                 save.Presence);
             worker.Start();
 
@@ -598,6 +600,7 @@ internal sealed class GameLoopService(
         MapLayout? map,
         string? nameSetId,
         string? nativeLanguage,
+        int? createSeed = null,
         IReadOnlyList<PresenceSnapshot>? presence = null) =>
         new(
             id,
@@ -610,6 +613,7 @@ internal sealed class GameLoopService(
             map,
             nameSetId,
             nativeLanguage,
+            createSeed,
             presence,
             _options,
             clients,

src/HSchool.Server/Game/SchoolState.cs

@@ -10,7 +10,8 @@ internal sealed record SchoolState(
     DateTime GameTime,
     bool Running,
     byte SpeedIndex,
-    IReadOnlyList<string> ModIds);
+    IReadOnlyList<string> ModIds,
+    int Seed);
 
 /// <summary>Everything the main menu needs in one read.</summary>
 internal sealed record SchoolsState(int MaxSchools, IReadOnlyList<SchoolState> Schools);

src/HSchool.Server/Game/SchoolWorker.cs

@@ -34,6 +34,7 @@ internal sealed class SchoolWorker
     private readonly MapLayout? _savedMap;
     private readonly string? _nameSetId;
     private string? _nativeLanguage;
+    private readonly int? _createSeed;
     private readonly IReadOnlyList<PresenceSnapshot>? _savedPresence;
     private readonly Action<int> _onFailed;
 
@@ -67,6 +68,7 @@ internal sealed class SchoolWorker
         MapLayout? savedMap,
         string? nameSetId,
         string? nativeLanguage,
+        int? createSeed,
         IReadOnlyList<PresenceSnapshot>? savedPresence,
         SimulationOptions options,
         ClientRegistry clients,
@@ -86,6 +88,7 @@ internal sealed class SchoolWorker
         _savedMap = savedMap;
         _nameSetId = nameSetId;
         _nativeLanguage = nativeLanguage;
+        _createSeed = createSeed;
         _savedPresence = savedPresence;
         _options = options;
         _clients = clients;
@@ -94,7 +97,7 @@ internal sealed class SchoolWorker
         _mods = mods;
         _onFailed = onFailed;
         _logger = logger;
-        _snapshot = new SchoolState(id, name, time, running, (byte)speedIndex, modIds ?? []);
+        _snapshot = new SchoolState(id, name, time, running, (byte)speedIndex, modIds ?? [], createSeed ?? 0);
     }
 
     public int Id => _id;
@@ -589,7 +592,8 @@ internal sealed class SchoolWorker
                 school.Clock.Time,
                 school.Clock.IsRunning,
                 (byte)school.Clock.SpeedIndex,
-                school.Catalog?.PackIds ?? _modIds ?? []));
+                school.Catalog?.PackIds ?? _modIds ?? [],
+                school.PeopleSeed));
         Volatile.Write(ref _rosterSnapshot, school.Roster);
         Volatile.Write(ref _applicantSnapshot, school.Applicants);
         Volatile.Write(ref _timetableSnapshot, school.Timetable);
@@ -868,7 +872,12 @@ internal sealed class SchoolWorker
 
         if (_isNew)
         {
-            seed = school.Id;
+            if (_createSeed is not int createSeed)
+            {
+                throw new InvalidOperationException($"School {_id} was created without a people seed.");
+            }
+
+            seed = createSeed;
             native = ResolveNative(catalog, nameSetId, seed, _nativeLanguage, generating: true);
             _nativeLanguage = native;
             roster = RosterGenerator.Generate(catalog, map, seed, nameSetId, school.Clock.Time, native);