Merge phase 29 country.

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

AGENTS.md

@@ -10,7 +10,7 @@ way; this file is *how to work in them*.
 | --- | --- |
 | schools, the game clock, game rules | `src/HSchool.Simulation` |
 | defs, JSONC catalog, map validation | `src/HSchool.Content` |
-| skills, traits, body, needs, name sets | `src/HSchool.Content` |
+| skills, traits, body, needs, countries | `src/HSchool.Content` |
 | people generation, families, roster records, yearly intake | `src/HSchool.People` |
 | timetable planning | `src/HSchool.Schedule` |
 | routes, day plans, who comes today | `src/HSchool.Ai` |
@@ -20,7 +20,7 @@ way; this file is *how to work in them*.
 | connection handling, workers, saves | `src/HSchool.Server` |
 | what runs locally | `src/HSchool.AppHost/AppHost.cs` |
 | screens, dialogs, formatting, UI language | `src/HSchool.Client/src` |
-| clothing, inventory, climate, dress codes | [`docs/design/inventory.md`](docs/design/inventory.md) — slice 7, phases 29–37; no code yet |
+| clothing, inventory, climate, dress codes | [`docs/design/inventory.md`](docs/design/inventory.md) — slice 7, phases 29–37; country is live, clothing is not |
 
 ## Commands
 
@@ -109,7 +109,7 @@ say so explicitly in the change description.
 
 - Simulation changes need a `GameClock` or `SchoolRegistry` test. They are fast and need no host.
   Putting a roster into `World` and ticking needs belongs there too.
-- People generation belongs in `tests/HSchool.People.Tests`. Same seed, map, name set and
+- People generation belongs in `tests/HSchool.People.Tests`. Same seed, map, country and
   native language must produce the same roster; the suite does not boot a host.
 - Timetable planning belongs in `tests/HSchool.Schedule.Tests`. Same staff, map and locks must
   produce the same table; the suite does not boot a host.

docs/phases/29-country.md

@@ -12,32 +12,32 @@ Create выбирает страну, а не набор имён. Имена и
 
 ## Задачи
 
-- [ ] `CountryDef` и `ClimatePresetDef` в `HSchool.Content`: страна вкладывает нынешние поля
+- [x] `CountryDef` и `ClimatePresetDef` в `HSchool.Content`: страна вкладывает нынешние поля
       набора имён в `names`, ссылается на пресеты списками id
-- [ ] Набор имён больше не выбираемый вид; папка `namesets/` в `core` уезжает в страну
+- [x] Набор имён больше не выбираемый вид; папка `namesets/` в `core` уезжает в страну
-- [ ] Ваниль: одна страна `Russia` с нынешним славянским набором и хотя бы одним пресетом
+- [x] Ваниль: одна страна `Russia` с нынешним славянским набором и хотя бы одним пресетом
       (числа погоды можно заглушить — живая улица в фазе 32)
-- [ ] `GET /api/catalog` отдаёт `countries` (`defName`, подпись, `nativeLanguages`,
+- [x] `GET /api/catalog` отдаёт `countries` (`defName`, подпись, `nativeLanguages`,
       `climatePresets`) вместо `nameSets`
-- [ ] `POST /api/schools` принимает `countryId`; неизвестный — `400` `unknown-country`.
+- [x] `POST /api/schools` принимает `countryId`; неизвестный — `400` `unknown-country`.
       `nameSetId` не принимается
-- [ ] Пресет климата записывается на школу: случайный из списка страны, от сида. Живой школе
+- [x] Пресет климата записывается на школу: случайный из списка страны, от сида. Живой школе
       его не сменить
-- [ ] Форма создания: подпись «Страна»; язык — если у страны их несколько
+- [x] Форма создания: подпись «Страна»; язык — если у страны их несколько
-- [ ] Старый сейв с `nameSetId: Slavic` поднимается как `Russia` + первый пресет; формат
+- [x] Старый сейв с `nameSetId: Slavic` поднимается как `Russia` + первый пресет; формат
       новее без `countryId` — как с прочими полями сейва, школа не стартует
-- [ ] `docs/protocol.md` и `AGENTS.md` (ориентир create / каталог) в том же коммите
+- [x] `docs/protocol.md` и `AGENTS.md` (ориентир create / каталог) в том же коммите
-- [ ] Золотой отпечаток ростера обновляется, если вход генератора сменил имя поля
+- [x] Золотой отпечаток ростера обновляется, если вход генератора сменил имя поля
 
 ## Тесты, без которых фаза не закрыта
 
-- [ ] Каталог `core` грузится; страна без имён или с неизвестным пресетом — ошибка загрузки
+- [x] Каталог `core` грузится; страна без имён или с неизвестным пресетом — ошибка загрузки
-- [ ] Create с `countryId: Russia` и без языка даёт тот же родной язык, что прежний сид без
+- [x] Create с `countryId: Russia` и без языка даёт тот же родной язык, что прежний сид без
       `nativeLanguage`
-- [ ] Create с неизвестной страной — `400` `unknown-country`
+- [x] Create с неизвестной страной — `400` `unknown-country`
-- [ ] Два create с одним сидом получают один и тот же пресет
+- [x] Два create с одним сидом получают один и тот же пресет
-- [ ] Старый сейв без страны поднимается
+- [x] Старый сейв без страны поднимается
-- [ ] Диалог создания показывает страны, не наборы имён; смена страны обновляет список языков
+- [x] Диалог создания показывает страны, не наборы имён; смена страны обновляет список языков
 
 ## Критерий готовности
 

docs/phases/README.md

@@ -127,7 +127,7 @@
 
 | Фаза | Статус | Зачем |
 | --- | --- | --- |
-| [29. Страна](29-country.md) | 🔄 | `CountryDef`, create выбирает страну, климат-пресет от сида |
+| [29. Страна](29-country.md) | ✅ | `CountryDef`, create выбирает страну, климат-пресет от сида |
 | [30. Слои и палитра](30-apparel-defs.md) | ✅ | Поля `ThingDef`, `ColorDef`, ванильная одежда и ноша |
 | [31. Генератор одевает](31-dress-generator.md) | ⬜ | Гардероб на человеке, ноша-число, `people.json` |
 

docs/protocol.md

@@ -89,13 +89,15 @@ single seats field on a homeroom and the old slot rows on everything else.
 Things carry `pupilSlots` — how many pupils that thing hosts. The snapshot's per-node pupil-slot
 total is computed on the server.
 
-`nameSets` is the list of placeable name packs (`defName` + label + `nativeLanguages`). Each
+`countries` is the list of placeable countries (`defName` + label + `nativeLanguages` +
-`nativeLanguages` entry is a skill (`defName` + label). The create dialog picks a name set and a
+`climatePresets`). Each `nativeLanguages` entry is a skill (`defName` + label). The create
-native language; the language list comes from that set (vanilla Slavic: Russian, Belarusian,
+dialog picks a country and, when that country lists more than one tongue, a native language;
-Ukrainian). It is independent of the UI language. Everyone in the school is generated with that
+the language list comes from that country (vanilla Russia: Russian, Belarusian, Ukrainian).
-native. Other languages of the same set often appear at a low skill — a Russian speaker who
+It is independent of the UI language. Everyone in the school is generated with that native.
-understands Belarusian. Those rolls live on the `NameSetDef` (`relatedLanguageChance` and
+Other languages of the same country often appear at a low skill — a Russian speaker who
-neighbours), not on this catalog payload.
+understands Belarusian. Those rolls live on the nested names of the `CountryDef`
+(`relatedLanguageChance` and neighbours), not on this catalog payload. `climatePresets` are
+ids; the school rolls one at create from its seed and keeps it.
 
 `subjects` is the list of placeable subjects (`defName`, label, `gradeMin`/`gradeMax`,
 `hoursPerWeek`, `skills` with shares, and optional `room`). `room` is the RoomDef the lesson
@@ -121,7 +123,7 @@ Body:
   "startDate": "2012-03-31T06:00:00Z",
   "modIds": [],
   "map": null,
-  "nameSetId": "Slavic",
+  "countryId": "Russia",
   "nativeLanguage": null,
   "seed": null
 }
@@ -131,10 +133,10 @@ Body:
 pack's `requires` load first (stable topological sort over the player's order). The resolved
 order is returned as `modIds` on the created school and written to the save, so a restart loads
 the same catalog. Omit `map` (or send `null`) to use that pack set's default layout. A supplied map is validated as a connected yard-and-rooms graph.
-`nameSetId` is a `NameSetDef`; omit it to use the first placeable set in the catalog (vanilla:
+`countryId` is a `CountryDef`; omit it to use the first placeable country in the catalog (vanilla:
-`Slavic`). Unknown ids return `400` `unknown-name-set`.
+`Russia`). Unknown ids return `400` `unknown-country`. The old `nameSetId` field is not accepted.
-`nativeLanguage` is a skill from that set's `nativeLanguages`. Omit it (or send `null`) to pick
+`nativeLanguage` is a skill from that country's `nativeLanguages`. Omit it (or send `null`) to pick
-one from the school seed. An id that is not in the set returns `400` `unknown-native-language`.
+one from the school seed. An id that is not in the country returns `400` `unknown-native-language`.
 `seed` is an optional integer. Send it to reproduce a known school; omit it (or send `null`) and
 the server rolls one. Existing saves keep the seed already stored in the people file.
 
@@ -148,8 +150,8 @@ the server rolls one. Existing saves keep the seed already stored in the people
 | `400` `missing-mod` | A selected pack `requires` an id that was not selected. `missing` is that id. |
 | `400` `mod-cycle` | Selected packs require each other in a cycle. |
 | `400` `invalid-catalog` | The selected packs could not be loaded. |
-| `400` `unknown-name-set` | `nameSetId` is not a placeable `NameSetDef` in those packs. |
+| `400` `unknown-country` | `countryId` is not a placeable `CountryDef` in those packs. |
-| `400` `unknown-native-language` | `nativeLanguage` is not in that name set's `nativeLanguages`. |
+| `400` `unknown-native-language` | `nativeLanguage` is not in that country's `nativeLanguages`. |
 | `409` `school-limit-reached` | `maxSchools` schools already exist. |
 
 Failures are RFC 7807 problem details with an extra `code` field — that is what the UI switches on.

src/HSchool.Client/src/i18n/strings.ts

@@ -43,12 +43,12 @@ const ru = {
   errorMissingMod: 'Не выбран обязательный мод «{id}».',
   errorModCycle: 'Выбранные моды зависят друг от друга по кругу.',
   errorInvalidCatalog: 'Не удалось загрузить выбранные моды.',
-  errorUnknownNameSet: 'Выбранный набор имён не найден.',
+  errorUnknownCountry: 'Выбранная страна не найдена.',
-  errorUnknownNativeLanguage: 'Выбранный родной язык не входит в этот набор имён.',
+  errorUnknownNativeLanguage: 'Выбранный родной язык не входит в эту страну.',
   catalogLoadFailed: 'Не удалось загрузить каталог модов.',
 
   modsTitle: 'Моды',
-  nameSetTitle: 'Набор имён',
+  countryTitle: 'Страна',
   nativeLanguageTitle: 'Родной язык',
   nativeLanguageRandom: 'Случайный',
   randomNativeTitle: 'Выбрать язык наугад',
@@ -260,12 +260,12 @@ const en: Messages = {
   errorMissingMod: 'Required mod “{id}” is not selected.',
   errorModCycle: 'The selected mods depend on each other in a cycle.',
   errorInvalidCatalog: 'The selected packs could not be loaded.',
-  errorUnknownNameSet: 'The selected name set is not in the catalog.',
+  errorUnknownCountry: 'The selected country is not in the catalog.',
-  errorUnknownNativeLanguage: 'The selected native language is not in that name set.',
+  errorUnknownNativeLanguage: 'The selected native language is not in that country.',
   catalogLoadFailed: 'Could not load the mod catalog.',
 
   modsTitle: 'Mods',
-  nameSetTitle: 'Name set',
+  countryTitle: 'Country',
   nativeLanguageTitle: 'Native language',
   nativeLanguageRandom: 'Random',
   randomNativeTitle: 'Pick a language at random',

src/HSchool.Client/src/net/api.ts

@@ -53,7 +53,7 @@ export async function fetchRandomName(lang: string): Promise<string> {
 export interface CreateSchoolOptions {
   readonly modIds?: readonly string[];
   readonly map?: MapLayout;
-  readonly nameSetId?: string;
+  readonly countryId?: string;
   readonly nativeLanguage?: string;
   readonly seed?: number;
 }
@@ -71,7 +71,7 @@ export async function createSchool(
       startDate: startDate.toISOString(),
       modIds: extras.modIds ?? [],
       map: extras.map ?? null,
-      nameSetId: extras.nameSetId ?? null,
+      countryId: extras.countryId ?? null,
       nativeLanguage: extras.nativeLanguage ?? null,
       seed: extras.seed ?? null,
     }),
@@ -92,10 +92,11 @@ export interface DefInfo {
   readonly pupilSlots?: number;
 }
 
-export interface NameSetInfo {
+export interface CountryInfo {
   readonly defName: string;
   readonly label: string;
   readonly nativeLanguages: readonly DefInfo[];
+  readonly climatePresets: readonly string[];
 }
 
 export interface RoomSlotInfo {
@@ -170,7 +171,7 @@ export interface CatalogResponse {
   readonly rooms: readonly RoomInfo[];
   readonly things: readonly DefInfo[];
   readonly defaultMap: MapLayout;
-  readonly nameSets: readonly NameSetInfo[];
+  readonly countries: readonly CountryInfo[];
   readonly subjects: readonly SubjectInfo[];
   readonly dayFrame: DayFrameInfo | null;
   readonly holidays: readonly HolidayInfo[];

src/HSchool.Client/src/ui/createSchoolDialog.test.ts

@@ -54,11 +54,22 @@ function catalog(): CatalogResponse {
     ],
     things: [],
     defaultMap,
-    nameSets: [
+    countries: [
       {
-        defName: 'Russian',
+        defName: 'Russia',
-        label: 'Russian',
+        label: 'Russia',
-        nativeLanguages: [{ defName: 'Russian', label: 'Russian' }],
+        nativeLanguages: [
+          { defName: 'RussianLanguage', label: 'Russian' },
+          { defName: 'BelarusianLanguage', label: 'Belarusian' },
+          { defName: 'UkrainianLanguage', label: 'Ukrainian' },
+        ],
+        climatePresets: ['TemperateContinental'],
+      },
+      {
+        defName: 'Nordic',
+        label: 'Nordic',
+        nativeLanguages: [{ defName: 'NorwegianLanguage', label: 'Norwegian' }],
+        climatePresets: ['TemperateContinental'],
       },
     ],
     subjects: [],
@@ -162,6 +173,55 @@ describe('createSchoolDialog', () => {
     finish(school());
     await expect(opened).resolves.toMatchObject({ name: 'North' });
   });
+
+  it('shows countries and refreshes languages when the country changes', async () => {
+    const opened = createSchoolDialog({
+      defaultStartDate: new Date('2024-09-01T00:00:00.000Z'),
+      suggestName: async () => 'North',
+      create: async () => school(),
+    });
+    await vi.waitFor(() => expect(fetchCatalog).toHaveBeenCalled());
+    const dialog = document.querySelector('dialog');
+    if (dialog === null) {
+      throw new Error('create dialog is missing');
+    }
+
+    expect(byText(dialog, '.field__label', t('countryTitle'))).toBeTruthy();
+    expect([...dialog.querySelectorAll('.field__label')].some((node) => node.textContent === 'Name set')).toBe(false);
+
+    const countrySelect = dialog.querySelector('select');
+    if (!(countrySelect instanceof HTMLSelectElement)) {
+      throw new Error('country select is missing');
+    }
+
+    expect([...countrySelect.options].map((option) => option.value)).toEqual(['Russia', 'Nordic']);
+    const nativeField = byText(dialog, '.field__label', t('nativeLanguageTitle')).closest('.field');
+    if (!(nativeField instanceof HTMLElement)) {
+      throw new Error('native language field is missing');
+    }
+
+    expect(nativeField.hidden).toBe(false);
+
+    countrySelect.value = 'Nordic';
+    countrySelect.dispatchEvent(new Event('change'));
+    expect(nativeField.hidden).toBe(true);
+
+    countrySelect.value = 'Russia';
+    countrySelect.dispatchEvent(new Event('change'));
+    const nativeSelect = nativeField.querySelector('select');
+    if (!(nativeSelect instanceof HTMLSelectElement)) {
+      throw new Error('native language select is missing');
+    }
+
+    expect([...nativeSelect.options].map((option) => option.value)).toEqual([
+      '',
+      'RussianLanguage',
+      'BelarusianLanguage',
+      'UkrainianLanguage',
+    ]);
+    expect(nativeField.hidden).toBe(false);
+    void opened;
+  });
 });
 
 describe('map reset from the create editor', () => {

src/HSchool.Client/src/ui/createSchoolDialog.ts

@@ -32,7 +32,7 @@ export function createSchoolDialog(options: CreateSchoolOptions): Promise<School
   const extraModIds = new Set<string>();
   let catalog: CatalogResponse | null = null;
   let currentMap: MapLayout | null = null;
-  let nameSetId: string | null = null;
+  let countryId: string | null = null;
   let nativeLanguageId: string | null = null;
 
   const modsField = el('div', { class: 'field' });
@@ -40,11 +40,11 @@ export function createSchoolDialog(options: CreateSchoolOptions): Promise<School
   const modsList = el('div', { class: 'mod-list' });
   modsField.append(modsLabel, modsList);
 
-  const nameSetLabel = el('span', { class: 'field__label' });
+  const countryLabel = el('span', { class: 'field__label' });
-  const nameSetSelect = el('select', { class: 'input' });
+  const countrySelect = el('select', { class: 'input' });
-  const nameSetField = el('label', { class: 'field' }, nameSetLabel, nameSetSelect);
+  const countryField = el('label', { class: 'field' }, countryLabel, countrySelect);
-  nameSetSelect.addEventListener('change', () => {
+  countrySelect.addEventListener('change', () => {
-    nameSetId = nameSetSelect.value === '' ? null : nameSetSelect.value;
+    countryId = countrySelect.value === '' ? null : countrySelect.value;
     nativeLanguageId = null;
     if (catalog !== null) {
       paintNativeLanguages(catalog);
@@ -110,7 +110,7 @@ export function createSchoolDialog(options: CreateSchoolOptions): Promise<School
     el('label', { class: 'field' }, nameLabel, el('div', { class: 'field__row' }, nameInput, randomButton)),
     el('div', { class: 'field' }, startLabel, el('div', { class: 'field__row' }, dateInput, timeInput)),
     modsField,
-    nameSetField,
+    countryField,
     nativeField,
     mapField,
     seedField,
@@ -125,7 +125,7 @@ export function createSchoolDialog(options: CreateSchoolOptions): Promise<School
     const waiting = value || catalog === null;
     submitButton.toggleAttribute('disabled', waiting);
     randomButton.toggleAttribute('disabled', value);
-    nativeRandomButton.toggleAttribute('disabled', value || languagesOf(catalog, nameSetId).length <= 1);
+    nativeRandomButton.toggleAttribute('disabled', value || languagesOf(catalog, countryId).length <= 1);
     editMapButton.toggleAttribute('disabled', waiting);
     seedInput.toggleAttribute('disabled', value);
   };
@@ -149,31 +149,31 @@ export function createSchoolDialog(options: CreateSchoolOptions): Promise<School
   const applyCatalog = (next: CatalogResponse): void => {
     catalog = next;
     currentMap = structuredClone(next.defaultMap);
-    const stillThere = next.nameSets.some((set) => set.defName === nameSetId);
+    const stillThere = next.countries.some((country) => country.defName === countryId);
-    nameSetId = stillThere ? nameSetId : (next.nameSets[0]?.defName ?? null);
+    countryId = stillThere ? countryId : (next.countries[0]?.defName ?? null);
-    if (!languagesOf(next, nameSetId).some((language) => language.defName === nativeLanguageId)) {
+    if (!languagesOf(next, countryId).some((language) => language.defName === nativeLanguageId)) {
       nativeLanguageId = null;
     }
-    paintNameSets(next);
+    paintCountries(next);
     paintNativeLanguages(next);
     paintMapHint();
     setBusy(busy);
   };
 
-  const paintNameSets = (next: CatalogResponse): void => {
+  const paintCountries = (next: CatalogResponse): void => {
-    nameSetSelect.replaceChildren();
+    countrySelect.replaceChildren();
-    for (const set of next.nameSets) {
+    for (const country of next.countries) {
-      const option = el('option', { text: set.label });
+      const option = el('option', { text: country.label });
-      option.value = set.defName;
+      option.value = country.defName;
-      nameSetSelect.append(option);
+      countrySelect.append(option);
     }
 
-    nameSetSelect.value = nameSetId ?? '';
+    countrySelect.value = countryId ?? '';
-    nameSetSelect.disabled = next.nameSets.length <= 1;
+    countrySelect.disabled = next.countries.length <= 1;
   };
 
   const paintNativeLanguages = (next: CatalogResponse): void => {
-    const languages = languagesOf(next, nameSetId);
+    const languages = languagesOf(next, countryId);
     nativeSelect.replaceChildren();
     const random = el('option', { text: t('nativeLanguageRandom') });
     random.value = '';
@@ -187,7 +187,7 @@ export function createSchoolDialog(options: CreateSchoolOptions): Promise<School
     nativeSelect.value = nativeLanguageId ?? '';
     nativeSelect.disabled = languages.length <= 1;
     nativeRandomButton.toggleAttribute('disabled', busy || languages.length <= 1);
-    nativeField.hidden = languages.length === 0;
+    nativeField.hidden = languages.length <= 1;
   };
 
   const reloadCatalog = async (): Promise<void> => {
@@ -242,7 +242,7 @@ export function createSchoolDialog(options: CreateSchoolOptions): Promise<School
   const localize = (): void => {
     title.textContent = t('newSchool');
     modsLabel.textContent = t('modsTitle');
-    nameSetLabel.textContent = t('nameSetTitle');
+    countryLabel.textContent = t('countryTitle');
     nativeLabel.textContent = t('nativeLanguageTitle');
     nativeRandomButton.textContent = t('randomName');
     nativeRandomButton.title = t('randomNativeTitle');
@@ -260,7 +260,7 @@ export function createSchoolDialog(options: CreateSchoolOptions): Promise<School
     cancelButton.textContent = t('cancel');
     paintMapHint();
     if (catalog !== null) {
-      paintNameSets(catalog);
+      paintCountries(catalog);
       paintNativeLanguages(catalog);
     }
   };
@@ -284,7 +284,7 @@ export function createSchoolDialog(options: CreateSchoolOptions): Promise<School
       return;
     }
 
-    const languages = languagesOf(catalog, nameSetId);
+    const languages = languagesOf(catalog, countryId);
     if (languages.length === 0) {
       return;
     }
@@ -332,7 +332,7 @@ export function createSchoolDialog(options: CreateSchoolOptions): Promise<School
       .create(nameInput.value.trim(), startDate, {
         modIds: [...extraModIds],
         map: currentMap,
-        nameSetId: nameSetId ?? undefined,
+        countryId: countryId ?? undefined,
         nativeLanguage: nativeLanguageId ?? undefined,
         seed: seed ?? undefined,
       })
@@ -349,12 +349,12 @@ export function createSchoolDialog(options: CreateSchoolOptions): Promise<School
   return modal.open(nameInput);
 }
 
-function languagesOf(catalog: CatalogResponse | null, nameSetId: string | null): readonly { readonly defName: string; readonly label: string }[] {
+function languagesOf(catalog: CatalogResponse | null, countryId: string | null): readonly { readonly defName: string; readonly label: string }[] {
-  if (catalog === null || nameSetId === null) {
+  if (catalog === null || countryId === null) {
     return [];
   }
 
-  return catalog.nameSets.find((set) => set.defName === nameSetId)?.nativeLanguages ?? [];
+  return catalog.countries.find((country) => country.defName === countryId)?.nativeLanguages ?? [];
 }
 
 function mapsEqual(left: MapLayout, right: MapLayout): boolean {
@@ -401,8 +401,8 @@ function describe(reason: unknown): string {
       return t('errorModCycle');
     case 'invalid-catalog':
       return t('errorInvalidCatalog');
-    case 'unknown-name-set':
+    case 'unknown-country':
-      return t('errorUnknownNameSet');
+      return t('errorUnknownCountry');
     case 'unknown-native-language':
       return t('errorUnknownNativeLanguage');
     default:

src/HSchool.Content/CatalogLoader.cs

@@ -307,7 +307,8 @@ public sealed class CatalogLoader
         var traits = new Dictionary<string, TraitDef>(StringComparer.Ordinal);
         var bodyAttributes = new Dictionary<string, BodyAttributeDef>(StringComparer.Ordinal);
         var needs = new Dictionary<string, NeedDef>(StringComparer.Ordinal);
-        var nameSets = new Dictionary<string, NameSetDef>(StringComparer.Ordinal);
+        var countries = new Dictionary<string, CountryDef>(StringComparer.Ordinal);
+        var climatePresets = new Dictionary<string, ClimatePresetDef>(StringComparer.Ordinal);
         var subjects = new Dictionary<string, SubjectDef>(StringComparer.Ordinal);
         var staffing = new Dictionary<string, StaffingDef>(StringComparer.Ordinal);
         var dayFrames = new Dictionary<string, DayFrameDef>(StringComparer.Ordinal);
@@ -355,8 +356,11 @@ public sealed class CatalogLoader
                 case DefKind.Need:
                     needs[key.Name] = Jsonc.Deserialize<NeedDef>(json);
                     break;
-                case DefKind.NameSet:
+                case DefKind.Country:
-                    nameSets[key.Name] = Jsonc.Deserialize<NameSetDef>(json);
+                    countries[key.Name] = Jsonc.Deserialize<CountryDef>(json);
+                    break;
+                case DefKind.ClimatePreset:
+                    climatePresets[key.Name] = Jsonc.Deserialize<ClimatePresetDef>(json);
                     break;
                 case DefKind.Subject:
                     subjects[key.Name] = Jsonc.Deserialize<SubjectDef>(json);
@@ -393,7 +397,8 @@ public sealed class CatalogLoader
             traits,
             bodyAttributes,
             needs,
-            nameSets,
+            countries,
+            climatePresets,
             subjects,
             staffing,
             dayFrames,
@@ -541,7 +546,8 @@ public sealed class CatalogLoader
             .Concat(Enumerate(catalog.Traits.Values))
             .Concat(Enumerate(catalog.BodyAttributes.Values))
             .Concat(Enumerate(catalog.Needs.Values))
-            .Concat(Enumerate(catalog.NameSets.Values))
+            .Concat(Enumerate(catalog.Countries.Values))
+            .Concat(Enumerate(catalog.ClimatePresets.Values))
             .Concat(Enumerate(catalog.Subjects.Values))
             .Concat(Enumerate(catalog.Staffing.Values))
             .Concat(Enumerate(catalog.DayFrames.Values))

src/HSchool.Content/DefCatalog.cs

@@ -20,7 +20,8 @@ public sealed class DefCatalog
         IReadOnlyDictionary<string, TraitDef> traits,
         IReadOnlyDictionary<string, BodyAttributeDef> bodyAttributes,
         IReadOnlyDictionary<string, NeedDef> needs,
-        IReadOnlyDictionary<string, NameSetDef> nameSets,
+        IReadOnlyDictionary<string, CountryDef> countries,
+        IReadOnlyDictionary<string, ClimatePresetDef> climatePresets,
         IReadOnlyDictionary<string, SubjectDef> subjects,
         IReadOnlyDictionary<string, StaffingDef> staffing,
         IReadOnlyDictionary<string, DayFrameDef> dayFrames,
@@ -43,7 +44,8 @@ public sealed class DefCatalog
         Traits = traits;
         BodyAttributes = bodyAttributes;
         Needs = needs;
-        NameSets = nameSets;
+        Countries = countries;
+        ClimatePresets = climatePresets;
         Subjects = subjects;
         Staffing = staffing;
         DayFrames = dayFrames;
@@ -91,7 +93,9 @@ public sealed class DefCatalog
 
     public IReadOnlyDictionary<string, NeedDef> Needs { get; }
 
-    public IReadOnlyDictionary<string, NameSetDef> NameSets { get; }
+    public IReadOnlyDictionary<string, CountryDef> Countries { get; }
+
+    public IReadOnlyDictionary<string, ClimatePresetDef> ClimatePresets { get; }
 
     public IReadOnlyDictionary<string, SubjectDef> Subjects { get; }
 
@@ -133,7 +137,8 @@ public sealed class DefCatalog
             DefKind.Trait => Traits.GetValueOrDefault(defName),
             DefKind.BodyAttribute => BodyAttributes.GetValueOrDefault(defName),
             DefKind.Need => Needs.GetValueOrDefault(defName),
-            DefKind.NameSet => NameSets.GetValueOrDefault(defName),
+            DefKind.Country => Countries.GetValueOrDefault(defName),
+            DefKind.ClimatePreset => ClimatePresets.GetValueOrDefault(defName),
             DefKind.Subject => Subjects.GetValueOrDefault(defName),
             DefKind.Staffing => Staffing.GetValueOrDefault(defName),
             DefKind.DayFrame => DayFrames.GetValueOrDefault(defName),
@@ -212,7 +217,8 @@ public sealed class DefCatalog
         TraitDef => DefKind.Trait,
         BodyAttributeDef => DefKind.BodyAttribute,
         NeedDef => DefKind.Need,
-        NameSetDef => DefKind.NameSet,
+        CountryDef => DefKind.Country,
+        ClimatePresetDef => DefKind.ClimatePreset,
         SubjectDef => DefKind.Subject,
         StaffingDef => DefKind.Staffing,
         DayFrameDef => DefKind.DayFrame,
@@ -245,4 +251,17 @@ public sealed class DefCatalog
         set.Remove(defName);
         return set;
     }
+
+    /// <summary>Nested names of a concrete country, or false when the id is missing or abstract.</summary>
+    public bool TryGetCountryNames(string countryId, out NameSetDef names)
+    {
+        if (Countries.TryGetValue(countryId, out var country) && !country.Abstract)
+        {
+            names = country.Names;
+            return true;
+        }
+
+        names = null!;
+        return false;
+    }
 }

src/HSchool.Content/Defs.cs

@@ -14,7 +14,8 @@ public enum DefKind
     Trait,
     BodyAttribute,
     Need,
-    NameSet,
+    Country,
+    ClimatePreset,
     Subject,
     Staffing,
     DayFrame,

src/HSchool.Content/PackPaths.cs

@@ -105,8 +105,11 @@ internal static class PackPaths
             case "needs":
                 kind = DefKind.Need;
                 return true;
-            case "namesets":
+            case "countries":
-                kind = DefKind.NameSet;
+                kind = DefKind.Country;
+                return true;
+            case "climates":
+                kind = DefKind.ClimatePreset;
                 return true;
             case "subjects":
                 kind = DefKind.Subject;

src/HSchool.Content/PeopleDefValidator.cs

@@ -25,9 +25,9 @@ internal static class PeopleDefValidator
             ValidateNeed(need);
         }
 
-        foreach (var names in catalog.NameSets.Values)
+        foreach (var country in catalog.Countries.Values)
         {
-            ValidateNameSet(names, catalog);
+            ValidateCountry(country, catalog);
         }
 
         foreach (var subject in catalog.Subjects.Values)
@@ -547,61 +547,90 @@ internal static class PeopleDefValidator
         }
     }
 
-    private static void ValidateNameSet(NameSetDef names, DefCatalog catalog)
+    private static void ValidateCountry(CountryDef country, DefCatalog catalog)
+    {
+        if (country.Abstract)
+        {
+            return;
+        }
+
+        if (country.ClimatePresets.Count == 0)
+        {
+            throw new ContentLoadException($"CountryDef '{country.DefName}' needs at least one climate preset.");
+        }
+
+        var seen = new HashSet<string>(StringComparer.Ordinal);
+        foreach (var presetId in country.ClimatePresets)
+        {
+            if (string.IsNullOrWhiteSpace(presetId) || !seen.Add(presetId))
+            {
+                throw new ContentLoadException($"CountryDef '{country.DefName}' has a missing or duplicate climate preset.");
+            }
+
+            if (!catalog.ClimatePresets.TryGetValue(presetId, out var preset) || preset.Abstract)
+            {
+                throw new ContentLoadException($"CountryDef '{country.DefName}' references unknown ClimatePresetDef '{presetId}'.");
+            }
+        }
+
+        ValidateNameSet(country.Names ?? new NameSetDef(), catalog, country.DefName);
+    }
+
+    private static void ValidateNameSet(NameSetDef names, DefCatalog catalog, string countryDefName)
     {
         if (!NameGrammar.IsKnownPatronymic(names.PatronymicRule))
         {
-            throw new ContentLoadException($"NameSetDef '{names.DefName}' has unknown patronymicRule '{names.PatronymicRule}'.");
+            throw new ContentLoadException($"CountryDef '{countryDefName}' has unknown patronymicRule '{names.PatronymicRule}'.");
         }
 
         foreach (var native in names.Spoken)
         {
             if (!catalog.Skills.TryGetValue(native, out var language) || language.Abstract)
             {
-                throw new ContentLoadException($"NameSetDef '{names.DefName}' native language '{native}' is not a SkillDef.");
+                throw new ContentLoadException($"CountryDef '{countryDefName}' native language '{native}' is not a SkillDef.");
             }
         }
 
         if (names.RelatedLanguageChance is < 0 or > 1)
         {
-            throw new ContentLoadException($"NameSetDef '{names.DefName}' relatedLanguageChance must be 0–1.");
+            throw new ContentLoadException($"CountryDef '{countryDefName}' relatedLanguageChance must be 0–1.");
         }
 
         if (names.RelatedLanguageStdDev < 0)
         {
-            throw new ContentLoadException($"NameSetDef '{names.DefName}' relatedLanguageStdDev must not be negative.");
+            throw new ContentLoadException($"CountryDef '{countryDefName}' relatedLanguageStdDev must not be negative.");
         }
 
         if (names.RelatedLanguageMean < 0)
         {
-            throw new ContentLoadException($"NameSetDef '{names.DefName}' relatedLanguageMean must not be negative.");
+            throw new ContentLoadException($"CountryDef '{countryDefName}' relatedLanguageMean must not be negative.");
         }
 
         if (names.RelatedLanguageMax < 0)
         {
-            throw new ContentLoadException($"NameSetDef '{names.DefName}' relatedLanguageMax must not be negative.");
+            throw new ContentLoadException($"CountryDef '{countryDefName}' relatedLanguageMax must not be negative.");
         }
 
         if (!NameGrammar.IsKnownGiven(names.DefaultGivenDeclension))
         {
-            throw new ContentLoadException($"NameSetDef '{names.DefName}' has unknown defaultGivenDeclension.");
+            throw new ContentLoadException($"CountryDef '{countryDefName}' has unknown defaultGivenDeclension.");
         }
 
         if (!NameGrammar.IsKnownSurname(names.DefaultSurnameDeclension))
         {
-            throw new ContentLoadException($"NameSetDef '{names.DefName}' has unknown defaultSurnameDeclension.");
+            throw new ContentLoadException($"CountryDef '{countryDefName}' has unknown defaultSurnameDeclension.");
         }
 
         if (names.MaleGiven.Count == 0 || names.FemaleGiven.Count == 0 || names.Surnames.Count == 0)
         {
-            throw new ContentLoadException($"NameSetDef '{names.DefName}' needs male names, female names and surnames.");
+            throw new ContentLoadException($"CountryDef '{countryDefName}' needs male names, female names and surnames.");
         }
 
         foreach (var given in names.MaleGiven.Concat(names.FemaleGiven))
         {
             if (string.IsNullOrWhiteSpace(given.Form))
             {
-                throw new ContentLoadException($"NameSetDef '{names.DefName}' has an empty given name.");
+                throw new ContentLoadException($"CountryDef '{countryDefName}' has an empty given name.");
             }
 
             if (given.Cases is null)
@@ -611,7 +640,7 @@ internal static class PeopleDefValidator
                     : given.Declension;
                 if (!NameGrammar.IsKnownGiven(model))
                 {
-                    throw new ContentLoadException($"NameSetDef '{names.DefName}' given '{given.Form}' has unknown declension '{model}'.");
+                    throw new ContentLoadException($"CountryDef '{countryDefName}' given '{given.Form}' has unknown declension '{model}'.");
                 }
             }
         }
@@ -620,7 +649,7 @@ internal static class PeopleDefValidator
         {
             if (string.IsNullOrWhiteSpace(surname.Male) || string.IsNullOrWhiteSpace(surname.Female))
             {
-                throw new ContentLoadException($"NameSetDef '{names.DefName}' has a surname missing a gendered form.");
+                throw new ContentLoadException($"CountryDef '{countryDefName}' has a surname missing a gendered form.");
             }
 
             if (surname.MaleCases is null && surname.FemaleCases is null)
@@ -630,7 +659,7 @@ internal static class PeopleDefValidator
                     : surname.Declension;
                 if (!NameGrammar.IsKnownSurname(model))
                 {
-                    throw new ContentLoadException($"NameSetDef '{names.DefName}' surname '{surname.Male}' has unknown declension '{model}'.");
+                    throw new ContentLoadException($"CountryDef '{countryDefName}' surname '{surname.Male}' has unknown declension '{model}'.");
                 }
             }
         }

src/HSchool.Content/PeopleDefs.cs

@@ -359,7 +359,10 @@ public sealed class SurnameEntry
     public CaseTable? FemaleCases { get; init; }
 }
 
-public sealed class NameSetDef : Def
+/// <summary>
+/// Nested name grammar of a <see cref="CountryDef"/>. Not a selectable catalog kind of its own.
+/// </summary>
+public sealed class NameSetDef
 {
     public string PatronymicRule { get; init; } = NameGrammar.SlavicPatronymic;
 
@@ -368,7 +371,7 @@ public sealed class NameSetDef : Def
     public string DefaultSurnameDeclension { get; init; } = NameGrammar.Ov;
 
     /// <summary>
-    /// Languages this set can speak natively. Slavic names cover Russian, Belarusian and
+    /// Languages this country can speak natively. Slavic names cover Russian, Belarusian and
     /// Ukrainian; the school picks one at create. Singular <see cref="NativeLanguage"/> is still
     /// accepted in JSONC for a one-language pack.
     /// </summary>
@@ -401,3 +404,20 @@ public sealed class NameSetDef : Def
 
     public IReadOnlyList<SurnameEntry> Surnames { get; init; } = [];
 }
+
+/// <summary>
+/// What the player picks at create: nested names plus climate-preset ids. Weather numbers live
+/// on <see cref="ClimatePresetDef"/> and stay unused until phase 32.
+/// </summary>
+public sealed class CountryDef : Def
+{
+    public IReadOnlyList<string> ClimatePresets { get; init; } = [];
+
+    public NameSetDef Names { get; init; } = new();
+}
+
+/// <summary>
+/// Outdoor climate a country may roll. Monthly temperatures land in phase 32; the id is enough
+/// to persist which preset a school was born with.
+/// </summary>
+public sealed class ClimatePresetDef : Def;

src/HSchool.People/ApplicantPool.cs

@@ -15,12 +15,12 @@ public sealed record ApplicantPool(int Week, int NextIndex, IReadOnlyList<Applic
         DefCatalog catalog,
         Roster roster,
         int schoolSeed,
-        string nameSetId,
+        string countryId,
         DateTime asOf,
         string? nativeLanguage = null)
     {
         var week = ApplicantWeeks.Id(asOf);
-        return Fill(catalog, roster, schoolSeed, nameSetId, asOf, new ApplicantPool(week, 0, []), nativeLanguage: nativeLanguage);
+        return Fill(catalog, roster, schoolSeed, countryId, asOf, new ApplicantPool(week, 0, []), nativeLanguage: nativeLanguage);
     }
 
     /// <summary>
@@ -31,7 +31,7 @@ public sealed record ApplicantPool(int Week, int NextIndex, IReadOnlyList<Applic
         DefCatalog catalog,
         Roster roster,
         int schoolSeed,
-        string nameSetId,
+        string countryId,
         DateTime asOf,
         string? nativeLanguage = null)
     {
@@ -44,7 +44,7 @@ public sealed record ApplicantPool(int Week, int NextIndex, IReadOnlyList<Applic
         var pool = this;
         for (var week = Week + 1; week <= target; week++)
         {
-            pool = Step(pool, catalog, roster, schoolSeed, nameSetId, asOf, week, nativeLanguage);
+            pool = Step(pool, catalog, roster, schoolSeed, countryId, asOf, week, nativeLanguage);
         }
 
         return pool;
@@ -93,7 +93,7 @@ public sealed record ApplicantPool(int Week, int NextIndex, IReadOnlyList<Applic
         DefCatalog catalog,
         Roster roster,
         int schoolSeed,
-        string nameSetId,
+        string countryId,
         DateTime asOf,
         int week,
         string? nativeLanguage)
@@ -113,7 +113,7 @@ public sealed record ApplicantPool(int Week, int NextIndex, IReadOnlyList<Applic
             catalog,
             roster,
             schoolSeed,
-            nameSetId,
+            countryId,
             asOf,
             new ApplicantPool(week, current.NextIndex, staying),
             rng,
@@ -124,16 +124,16 @@ public sealed record ApplicantPool(int Week, int NextIndex, IReadOnlyList<Applic
         DefCatalog catalog,
         Roster roster,
         int schoolSeed,
-        string nameSetId,
+        string countryId,
         DateTime asOf,
         ApplicantPool current,
         Random? rng = null,
         string? nativeLanguage = null)
     {
         var rules = RequireRules(catalog);
-        if (!catalog.NameSets.TryGetValue(nameSetId, out var names))
+        if (!catalog.TryGetCountryNames(countryId, out var names))
         {
-            throw new ArgumentException($"Unknown name set '{nameSetId}'.", nameof(nameSetId));
+            throw new ArgumentException($"Unknown country '{countryId}'.", nameof(countryId));
         }
 
         var native = NativeLanguages.Pick(names, schoolSeed, nativeLanguage, rollIfOmitted: false);

src/HSchool.People/CountryClimate.cs

@@ -0,0 +1,26 @@
+namespace HSchool.People;
+
+/// <summary>
+/// A country lists climate presets; the school rolls one at birth from the school seed.
+/// Reloads without a stored pick take the first listed preset so old saves stay put.
+/// </summary>
+public static class CountryClimate
+{
+    public static string? Pick(CountryDef country, int schoolSeed, bool rollIfOmitted)
+    {
+        ArgumentNullException.ThrowIfNull(country);
+        var presets = country.ClimatePresets;
+        if (presets.Count == 0)
+        {
+            return null;
+        }
+
+        if (!rollIfOmitted || presets.Count == 1)
+        {
+            return presets[0];
+        }
+
+        var rng = new Random(Seed.ForSchool(schoolSeed, Seed.ClimatePresetSalt));
+        return presets[rng.Next(presets.Count)];
+    }
+}

src/HSchool.People/RosterGenerator.cs

@@ -15,17 +15,17 @@ public static class RosterGenerator
         DefCatalog catalog,
         MapLayout map,
         int schoolSeed,
-        string nameSetId,
+        string countryId,
         DateTime? asOf = null,
         string? nativeLanguage = null)
     {
         ArgumentNullException.ThrowIfNull(catalog);
         ArgumentNullException.ThrowIfNull(map);
-        ArgumentException.ThrowIfNullOrWhiteSpace(nameSetId);
+        ArgumentException.ThrowIfNullOrWhiteSpace(countryId);
 
-        if (!catalog.NameSets.TryGetValue(nameSetId, out var names))
+        if (!catalog.TryGetCountryNames(countryId, out var names))
         {
-            throw new ArgumentException($"Unknown name set '{nameSetId}'.", nameof(nameSetId));
+            throw new ArgumentException($"Unknown country '{countryId}'.", nameof(countryId));
         }
 
         var native = NativeLanguages.Pick(names, schoolSeed, nativeLanguage, rollIfOmitted: true);

src/HSchool.People/Seed.cs

@@ -15,6 +15,7 @@ public static class Seed
     public const int CommuteSalt = 7;
     public const int SkillGrantSalt = 8;
     public const int NativeLanguageSalt = 9;
+    public const int ClimatePresetSalt = 10;
 
     /// <summary>A stream that belongs to the school rather than to one family.</summary>
     public static int ForSchool(int schoolSeed, int salt) => Mix(schoolSeed, familyIndex: -1, salt);

src/HSchool.People/YearlyIntake.cs

@@ -38,17 +38,17 @@ public static class YearlyIntake
         DefCatalog catalog,
         Roster roster,
         int schoolSeed,
-        string nameSetId,
+        string countryId,
         DateTime asOf,
         string? nativeLanguage = null)
     {
         ArgumentNullException.ThrowIfNull(catalog);
         ArgumentNullException.ThrowIfNull(roster);
-        ArgumentException.ThrowIfNullOrWhiteSpace(nameSetId);
+        ArgumentException.ThrowIfNullOrWhiteSpace(countryId);
 
-        if (!catalog.NameSets.TryGetValue(nameSetId, out var names))
+        if (!catalog.TryGetCountryNames(countryId, out var names))
         {
-            throw new ArgumentException($"Unknown name set '{nameSetId}'.", nameof(nameSetId));
+            throw new ArgumentException($"Unknown country '{countryId}'.", nameof(countryId));
         }
 
         var native = NativeLanguages.Pick(names, schoolSeed, nativeLanguage, rollIfOmitted: false);

src/HSchool.Server/Api/ModEndpoints.cs

@@ -122,7 +122,7 @@ internal sealed record CatalogResponse(
     IReadOnlyList<DefInfoResponse> Floors,
     IReadOnlyList<RoomInfoResponse> Rooms,
     IReadOnlyList<DefInfoResponse> Things,
-    IReadOnlyList<NameSetInfoResponse> NameSets,
+    IReadOnlyList<CountryInfoResponse> Countries,
     IReadOnlyList<SubjectInfoResponse> Subjects,
     DayFrameResponse? DayFrame,
     IReadOnlyList<HolidayInfoResponse> Holidays,
@@ -135,7 +135,7 @@ internal sealed record CatalogResponse(
             Placeable(catalog.Floors.Values, catalog, locale),
             PlaceableRooms(catalog, locale),
             PlaceableThings(catalog, locale),
-            PlaceableNameSets(catalog, locale),
+            PlaceableCountries(catalog, locale),
             PlaceableSubjects(catalog, locale),
             MapDayFrame(catalog, locale),
             PlaceableHolidays(catalog, locale),
@@ -149,20 +149,21 @@ internal sealed record CatalogResponse(
             .Select(def => new DefInfoResponse(def.DefName, catalog.Label(locale, def)))
             .ToArray();
 
-    private static IReadOnlyList<NameSetInfoResponse> PlaceableNameSets(DefCatalog catalog, string locale) =>
+    private static IReadOnlyList<CountryInfoResponse> PlaceableCountries(DefCatalog catalog, string locale) =>
-        catalog.NameSets.Values
+        catalog.Countries.Values
             .Where(def => !def.Abstract)
             .OrderBy(def => def.DefName, StringComparer.Ordinal)
-            .Select(def => new NameSetInfoResponse(
+            .Select(def => new CountryInfoResponse(
                 def.DefName,
                 catalog.Label(locale, def),
-                def.Spoken
+                def.Names.Spoken
                     .Select(skill => new DefInfoResponse(
                         skill,
                         catalog.Skills.TryGetValue(skill, out var language)
                             ? catalog.Label(locale, language)
                             : skill))
-                    .ToArray()))
+                    .ToArray(),
+                def.ClimatePresets.ToArray()))
             .ToArray();
 
     private static IReadOnlyList<DefInfoResponse> PlaceableThings(DefCatalog catalog, string locale) =>
@@ -230,10 +231,11 @@ internal sealed record CatalogResponse(
 
 internal sealed record DefInfoResponse(string DefName, string Label, int PupilSlots = 0);
 
-internal sealed record NameSetInfoResponse(
+internal sealed record CountryInfoResponse(
     string DefName,
     string Label,
-    IReadOnlyList<DefInfoResponse> NativeLanguages);
+    IReadOnlyList<DefInfoResponse> NativeLanguages,
+    IReadOnlyList<string> ClimatePresets);
 
 internal sealed record RoomInfoResponse(
     string DefName,

src/HSchool.Server/Api/SchoolEndpoints.cs

@@ -53,7 +53,7 @@ internal static class SchoolEndpoints
                 DateTime.SpecifyKind(request.StartDate, DateTimeKind.Utc),
                 request.ModIds,
                 request.Map,
-                request.NameSetId,
+                request.CountryId,
                 request.NativeLanguage,
                 request.Seed,
                 NewCompletion<SchoolCreationOutcome>());
@@ -77,10 +77,10 @@ internal static class SchoolEndpoints
                     Problem(StatusCodes.Status400BadRequest, "unknown-mod", "A selected mod is missing."),
                 SchoolCreationError.InvalidCatalog =>
                     Problem(StatusCodes.Status400BadRequest, "invalid-catalog", "The selected packs could not be loaded."),
-                SchoolCreationError.UnknownNameSet =>
+                SchoolCreationError.UnknownCountry =>
-                    Problem(StatusCodes.Status400BadRequest, "unknown-name-set", "The selected name set is not in the catalog."),
+                    Problem(StatusCodes.Status400BadRequest, "unknown-country", "The selected country is not in the catalog."),
                 SchoolCreationError.UnknownNativeLanguage =>
-                    Problem(StatusCodes.Status400BadRequest, "unknown-native-language", "The selected native language is not in that name set."),
+                    Problem(StatusCodes.Status400BadRequest, "unknown-native-language", "The selected native language is not in that country."),
                 SchoolCreationError.MissingMod =>
                     Problem(
                         StatusCodes.Status400BadRequest,
@@ -508,7 +508,7 @@ internal sealed record CreateSchoolRequest(
     DateTime StartDate,
     IReadOnlyList<string>? ModIds,
     MapLayout? Map,
-    string? NameSetId,
+    string? CountryId,
     string? NativeLanguage,
     int? Seed);
 

src/HSchool.Server/Game/GameCommand.cs

@@ -16,7 +16,7 @@ internal abstract record GameCommand
         DateTime StartDate,
         IReadOnlyList<string>? ExtraModIds,
         MapLayout? Map,
-        string? NameSetId,
+        string? CountryId,
         string? NativeLanguage,
         int? Seed,
         TaskCompletionSource<SchoolCreationOutcome> Result) : GameCommand;

src/HSchool.Server/Game/GameLoopService.cs

@@ -357,20 +357,14 @@ internal sealed class GameLoopService(
                 return;
             }
 
-            var nameSetId = ResolveNameSetId(catalog, command.NameSetId);
+            var countryId = ResolveCountryId(catalog, command.CountryId);
-            if (nameSetId is null)
+            if (countryId is null || !catalog.Countries.TryGetValue(countryId, out var country) || country.Abstract)
             {
-                command.Result.TrySetResult(new SchoolCreationOutcome(null, SchoolCreationError.UnknownNameSet));
+                command.Result.TrySetResult(new SchoolCreationOutcome(null, SchoolCreationError.UnknownCountry));
                 return;
             }
 
-            if (!catalog.NameSets.TryGetValue(nameSetId, out var names))
+            if (!string.IsNullOrWhiteSpace(command.NativeLanguage) && !NativeLanguages.Allows(country.Names, command.NativeLanguage))
-            {
-                command.Result.TrySetResult(new SchoolCreationOutcome(null, SchoolCreationError.UnknownNameSet));
-                return;
-            }
-
-            if (!string.IsNullOrWhiteSpace(command.NativeLanguage) && !NativeLanguages.Allows(names, command.NativeLanguage))
             {
                 command.Result.TrySetResult(new SchoolCreationOutcome(null, SchoolCreationError.UnknownNativeLanguage));
                 return;
@@ -379,9 +373,10 @@ internal sealed class GameLoopService(
             var id = _nextId++;
             store.WriteNextId(_nextId);
             var seed = command.Seed ?? Random.Shared.Next();
-            var nativeLanguage = NativeLanguages.Pick(names, seed, command.NativeLanguage, rollIfOmitted: true);
+            var nativeLanguage = NativeLanguages.Pick(country.Names, seed, command.NativeLanguage, rollIfOmitted: true);
+            var climatePresetId = CountryClimate.Pick(country, seed, rollIfOmitted: true);
 
-            var worker = SpawnWorker(id, normalized, command.StartDate, running: true, ClockSpeed.DefaultIndex, isNew: true, packIds, command.Map, nameSetId, nativeLanguage, seed);
+            var worker = SpawnWorker(id, normalized, command.StartDate, running: true, ClockSpeed.DefaultIndex, isNew: true, packIds, command.Map, countryId, climatePresetId, nativeLanguage, seed);
             Track(worker);
             worker.Start();
 
@@ -548,7 +543,8 @@ internal sealed class GameLoopService(
                 isNew: false,
                 save.ModIds,
                 save.Map,
-                save.NameSetId,
+                save.CountryId,
+                save.ClimatePresetId,
                 save.NativeLanguage,
                 createSeed: null,
                 save.Presence);
@@ -598,7 +594,8 @@ internal sealed class GameLoopService(
         bool isNew,
         IReadOnlyList<string>? modIds,
         MapLayout? map,
-        string? nameSetId,
+        string? countryId,
+        string? climatePresetId,
         string? nativeLanguage,
         int? createSeed = null,
         IReadOnlyList<PresenceSnapshot>? presence = null) =>
@@ -611,7 +608,8 @@ internal sealed class GameLoopService(
             isNew,
             modIds,
             map,
-            nameSetId,
+            countryId,
+            climatePresetId,
             nativeLanguage,
             createSeed,
             presence,
@@ -624,12 +622,12 @@ internal sealed class GameLoopService(
             loggerFactory.CreateLogger($"HSchool.Server.Game.SchoolWorker.{id}"));
 
     /// <summary>
-    /// Empty request uses the first placeable set (core's Slavic). A named id must exist in the
+    /// Empty request uses the first placeable country (core's Russia). A named id must exist in
-    /// catalog already loaded for this pack list — unknown extras were rejected above.
+    /// the catalog already loaded for this pack list — unknown extras were rejected above.
     /// </summary>
-    internal static string? ResolveNameSetId(DefCatalog catalog, string? requested)
+    internal static string? ResolveCountryId(DefCatalog catalog, string? requested)
     {
-        var available = catalog.NameSets.Values
+        var available = catalog.Countries.Values
             .Where(def => !def.Abstract)
             .Select(def => def.DefName)
             .OrderBy(name => name, StringComparer.Ordinal)

src/HSchool.Server/Game/SchoolStore.cs

@@ -26,6 +26,11 @@ internal sealed class SchoolSave
 
     public MapLayout? Map { get; init; }
 
+    public string? CountryId { get; init; }
+
+    public string? ClimatePresetId { get; init; }
+
+    /// <summary>Legacy field. Format 2 and older; mapped to <see cref="CountryId"/> on load.</summary>
     public string? NameSetId { get; init; }
 
     public string? NativeLanguage { get; init; }
@@ -42,7 +47,7 @@ internal sealed record SchoolSaveIndex(int NextId);
 /// </summary>
 internal sealed class SchoolStore
 {
-    public const int CurrentFormat = 2;
+    public const int CurrentFormat = 3;
 
     private const string IndexFileName = "index.json";
 
@@ -178,6 +183,8 @@ internal sealed class SchoolStore
                     SpeedIndex = save.SpeedIndex,
                     ModIds = save.ModIds,
                     Map = save.Map,
+                    CountryId = save.CountryId,
+                    ClimatePresetId = save.ClimatePresetId,
                     NameSetId = save.NameSetId,
                     NativeLanguage = save.NativeLanguage,
                     Presence = save.Presence,
@@ -194,11 +201,40 @@ internal sealed class SchoolStore
     }
 
     /// <summary>
-    /// Named upgrade seam for saves older than <see cref="CurrentFormat"/>. Empty on purpose:
+    /// Format 2 stored a name set. Slavic becomes Russia; any other id is tried as a country
-    /// missing fields already default and extra fields are ignored. Put a migration here when a
+    /// (the example pack kept its defName). Climate is filled on the worker from the country's
-    /// format bump actually needs one.
+    /// first preset so the file is not rewritten until the school saves itself.
     /// </summary>
-    internal static SchoolSave UpgradeOlderSave(SchoolSave save) => save;
+    internal static SchoolSave UpgradeOlderSave(SchoolSave save)
+    {
+        if (!string.IsNullOrWhiteSpace(save.CountryId))
+        {
+            return save;
+        }
+
+        var countryId = save.NameSetId switch
+        {
+            "Slavic" or null or "" => "Russia",
+            _ => save.NameSetId,
+        };
+
+        return new SchoolSave
+        {
+            Format = save.Format,
+            Id = save.Id,
+            Name = save.Name,
+            GameTime = save.GameTime,
+            Running = save.Running,
+            SpeedIndex = save.SpeedIndex,
+            ModIds = save.ModIds,
+            Map = save.Map,
+            CountryId = countryId,
+            ClimatePresetId = save.ClimatePresetId,
+            NameSetId = save.NameSetId,
+            NativeLanguage = save.NativeLanguage,
+            Presence = save.Presence,
+        };
+    }
 
     public void Save(SchoolSave save)
     {

src/HSchool.Server/Game/SchoolWorker.cs

@@ -32,7 +32,8 @@ internal sealed class SchoolWorker
     private readonly bool _isNew;
     private readonly IReadOnlyList<string>? _modIds;
     private readonly MapLayout? _savedMap;
-    private readonly string? _nameSetId;
+    private readonly string? _countryId;
+    private string? _climatePresetId;
     private string? _nativeLanguage;
     private readonly int? _createSeed;
     private readonly IReadOnlyList<PresenceSnapshot>? _savedPresence;
@@ -66,7 +67,8 @@ internal sealed class SchoolWorker
         bool isNew,
         IReadOnlyList<string>? modIds,
         MapLayout? savedMap,
-        string? nameSetId,
+        string? countryId,
+        string? climatePresetId,
         string? nativeLanguage,
         int? createSeed,
         IReadOnlyList<PresenceSnapshot>? savedPresence,
@@ -86,7 +88,8 @@ internal sealed class SchoolWorker
         _isNew = isNew;
         _modIds = modIds;
         _savedMap = savedMap;
-        _nameSetId = nameSetId;
+        _countryId = countryId;
+        _climatePresetId = climatePresetId;
         _nativeLanguage = nativeLanguage;
         _createSeed = createSeed;
         _savedPresence = savedPresence;
@@ -857,12 +860,19 @@ internal sealed class SchoolWorker
 
     private bool InstallPeople(School school, DefCatalog catalog, MapLayout map)
     {
-        var nameSetId = ResolveNameSetId(catalog, _nameSetId);
+        var countryId = ResolveCountryId(catalog, _countryId);
-        if (nameSetId is null)
+        if (countryId is null)
         {
-            throw new SchoolContentUnavailableException($"School {_id} has no name set in its catalog.");
+            throw new SchoolContentUnavailableException($"School {_id} has no country in its catalog.");
         }
 
+        if (!catalog.Countries.TryGetValue(countryId, out var country) || country.Abstract)
+        {
+            throw new SchoolContentUnavailableException($"School {_id} has no country in its catalog.");
+        }
+
+        _climatePresetId = ResolveClimatePreset(country, _climatePresetId);
+
         var demand = SchoolDemand.From(catalog, map);
         Roster roster;
         ApplicantPool applicants;
@@ -878,10 +888,10 @@ internal sealed class SchoolWorker
             }
 
             seed = createSeed;
-            native = ResolveNative(catalog, nameSetId, seed, _nativeLanguage, generating: true);
+            native = ResolveNative(country, seed, _nativeLanguage, generating: true);
             _nativeLanguage = native;
-            roster = RosterGenerator.Generate(catalog, map, seed, nameSetId, school.Clock.Time, native);
+            roster = RosterGenerator.Generate(catalog, map, seed, countryId, school.Clock.Time, native);
-            applicants = ApplicantPool.Create(catalog, roster, seed, nameSetId, school.Clock.Time, native);
+            applicants = ApplicantPool.Create(catalog, roster, seed, countryId, school.Clock.Time, native);
             generated = true;
         }
         else
@@ -890,16 +900,16 @@ internal sealed class SchoolWorker
             if (loaded is null)
             {
                 seed = school.Id;
-                native = ResolveNative(catalog, nameSetId, seed, _nativeLanguage, generating: true);
+                native = ResolveNative(country, seed, _nativeLanguage, generating: true);
                 _nativeLanguage = native;
-                roster = RosterGenerator.Generate(catalog, map, seed, nameSetId, school.Clock.Time, native);
+                roster = RosterGenerator.Generate(catalog, map, seed, countryId, school.Clock.Time, native);
-                applicants = ApplicantPool.Create(catalog, roster, seed, nameSetId, school.Clock.Time, native);
+                applicants = ApplicantPool.Create(catalog, roster, seed, countryId, school.Clock.Time, native);
                 generated = true;
             }
             else
             {
                 seed = loaded.Seed;
-                native = ResolveNative(catalog, nameSetId, seed, _nativeLanguage, generating: false);
+                native = ResolveNative(country, seed, _nativeLanguage, generating: false);
                 _nativeLanguage = native;
                 roster = loaded.ToRoster();
                 if (loaded.Applicants is { Applicants.Count: > 0 })
@@ -908,7 +918,7 @@ internal sealed class SchoolWorker
                 }
                 else
                 {
-                    applicants = ApplicantPool.Create(catalog, roster, seed, nameSetId, school.Clock.Time, native);
+                    applicants = ApplicantPool.Create(catalog, roster, seed, countryId, school.Clock.Time, native);
                     generated = true;
                 }
             }
@@ -920,47 +930,41 @@ internal sealed class SchoolWorker
                 $"School {_id} roster does not match its map; the people file was left untouched.");
         }
 
-        school.InstallPeople(roster, seed, nameSetId, applicants, _nativeLanguage);
+        school.InstallPeople(roster, seed, countryId, applicants, _nativeLanguage, _climatePresetId);
         InstallTimetable(school);
         school.ConfigurePresence(_options.SchoolWeekDays, _options.MaxDecisionsPerTick);
         school.RestorePresence(_savedPresence);
         return generated;
     }
 
-    private static string? ResolveNameSetId(DefCatalog catalog, string? requested)
+    private static string? ResolveCountryId(DefCatalog catalog, string? requested)
     {
-        var available = catalog.NameSets.Values
+        if (string.IsNullOrWhiteSpace(requested))
-            .Where(def => !def.Abstract)
-            .Select(def => def.DefName)
-            .OrderBy(name => name, StringComparer.Ordinal)
-            .ToArray();
-        if (available.Length == 0)
         {
             return null;
         }
 
-        if (string.IsNullOrWhiteSpace(requested))
+        return catalog.Countries.TryGetValue(requested, out var country) && !country.Abstract
+            ? requested
+            : null;
+    }
+
+    private static string? ResolveClimatePreset(CountryDef country, string? requested)
+    {
+        if (!string.IsNullOrWhiteSpace(requested) && country.ClimatePresets.Contains(requested, StringComparer.Ordinal))
         {
-            return available[0];
+            return requested;
         }
 
-        return available.Contains(requested, StringComparer.Ordinal) ? requested : null;
+        return CountryClimate.Pick(country, schoolSeed: 0, rollIfOmitted: false);
     }
 
     private static string? ResolveNative(
-        DefCatalog catalog,
+        CountryDef country,
-        string nameSetId,
         int schoolSeed,
         string? requested,
-        bool generating)
+        bool generating) =>
-    {
+        NativeLanguages.Pick(country.Names, schoolSeed, requested, rollIfOmitted: generating && string.IsNullOrWhiteSpace(requested));
-        if (!catalog.NameSets.TryGetValue(nameSetId, out var names))
-        {
-            return null;
-        }
-
-        return NativeLanguages.Pick(names, schoolSeed, requested, rollIfOmitted: generating && string.IsNullOrWhiteSpace(requested));
-    }
 
     private void Persist()
     {
@@ -983,7 +987,8 @@ internal sealed class SchoolWorker
                 SpeedIndex = school.Clock.SpeedIndex,
                 ModIds = school.Catalog?.PackIds,
                 Map = school.Map,
-                NameSetId = _nameSetId,
+                CountryId = school.CountryId,
+                ClimatePresetId = school.ClimatePresetId,
                 NativeLanguage = _nativeLanguage,
                 Presence = school.CapturePresence(),
             });

src/HSchool.Server/mods/core/defs/climates/continental-cold.jsonc

@@ -0,0 +1,3 @@
+{
+  "defName": "ContinentalCold",
+}

src/HSchool.Server/mods/core/defs/climates/temperate-continental.jsonc

@@ -0,0 +1,3 @@
+{
+  "defName": "TemperateContinental",
+}

src/HSchool.Server/mods/core/defs/countries/russia.jsonc

@@ -0,0 +1,139 @@
+{
+  "defName": "Russia",
+  "climatePresets": ["TemperateContinental", "ContinentalCold"],
+  "names": {
+    "patronymicRule": "slavic",
+    "defaultGivenDeclension": "hard",
+    "defaultSurnameDeclension": "ov",
+    "nativeLanguages": ["RussianLanguage", "BelarusianLanguage", "UkrainianLanguage"],
+    "relatedLanguageChance": 0.6,
+    "relatedLanguageMean": 22,
+    "relatedLanguageStdDev": 8,
+    "relatedLanguageMax": 40,
+    "maleGiven": [
+      { "form": "Александр" },
+      { "form": "Алексей" },
+      { "form": "Андрей" },
+      { "form": "Антон" },
+      { "form": "Артём" },
+      { "form": "Борис" },
+      { "form": "Вадим" },
+      { "form": "Валерий" },
+      { "form": "Виктор" },
+      { "form": "Виталий" },
+      { "form": "Владимир" },
+      { "form": "Владислав" },
+      { "form": "Григорий" },
+      { "form": "Денис" },
+      { "form": "Дмитрий" },
+      { "form": "Евгений" },
+      { "form": "Егор" },
+      { "form": "Иван" },
+      { "form": "Игорь", "declension": "soft" },
+      { "form": "Илья", "declension": "ya" },
+      { "form": "Кирилл" },
+      { "form": "Константин" },
+      { "form": "Максим" },
+      { "form": "Михаил" },
+      { "form": "Никита", "declension": "a" },
+      { "form": "Николай" },
+      { "form": "Олег" },
+      { "form": "Павел" },
+      { "form": "Пётр" },
+      { "form": "Роман" },
+      { "form": "Сергей" },
+      { "form": "Станислав" },
+      { "form": "Степан" },
+      { "form": "Фёдор" },
+      { "form": "Юрий" },
+    ],
+    "femaleGiven": [
+      { "form": "Александра", "declension": "a" },
+      { "form": "Алина", "declension": "a" },
+      { "form": "Анастасия", "declension": "iya" },
+      { "form": "Анна", "declension": "a" },
+      { "form": "Валентина", "declension": "a" },
+      { "form": "Валерия", "declension": "iya" },
+      { "form": "Вера", "declension": "a" },
+      { "form": "Виктория", "declension": "iya" },
+      { "form": "Дарья", "declension": "ya" },
+      { "form": "Екатерина", "declension": "a" },
+      { "form": "Елена", "declension": "a" },
+      { "form": "Елизавета", "declension": "a" },
+      { "form": "Ирина", "declension": "a" },
+      { "form": "Ксения", "declension": "iya" },
+      {
+        "form": "Любовь",
+        "cases": {
+          "nom": "Любовь",
+          "gen": "Любови",
+          "dat": "Любови",
+          "acc": "Любовь",
+          "ins": "Любовью",
+          "pre": "Любови",
+        },
+      },
+      { "form": "Людмила", "declension": "a" },
+      { "form": "Маргарита", "declension": "a" },
+      { "form": "Мария", "declension": "iya" },
+      { "form": "Надежда", "declension": "a" },
+      { "form": "Наталья", "declension": "ya" },
+      { "form": "Нина", "declension": "a" },
+      { "form": "Оксана", "declension": "a" },
+      { "form": "Ольга", "declension": "a" },
+      { "form": "Полина", "declension": "a" },
+      { "form": "Светлана", "declension": "a" },
+      { "form": "София", "declension": "iya" },
+      { "form": "Татьяна", "declension": "a" },
+      { "form": "Юлия", "declension": "iya" },
+      { "form": "Яна", "declension": "a" },
+      { "form": "Вероника", "declension": "a" },
+      { "form": "Диана", "declension": "a" },
+      { "form": "Марина", "declension": "a" },
+    ],
+    "surnames": [
+      { "male": "Иванов", "female": "Иванова" },
+      { "male": "Петров", "female": "Петрова" },
+      { "male": "Смирнов", "female": "Смирнова" },
+      { "male": "Кузнецов", "female": "Кузнецова" },
+      { "male": "Попов", "female": "Попова" },
+      { "male": "Васильев", "female": "Васильева" },
+      { "male": "Соколов", "female": "Соколова" },
+      { "male": "Михайлов", "female": "Михайлова" },
+      { "male": "Новиков", "female": "Новикова" },
+      { "male": "Фёдоров", "female": "Фёдорова" },
+      { "male": "Морозов", "female": "Морозова" },
+      { "male": "Волков", "female": "Волкова" },
+      { "male": "Алексеев", "female": "Алексеева" },
+      { "male": "Лебедев", "female": "Лебедева" },
+      { "male": "Семёнов", "female": "Семёнова" },
+      { "male": "Егоров", "female": "Егорова" },
+      { "male": "Павлов", "female": "Павлова" },
+      { "male": "Козлов", "female": "Козлова" },
+      { "male": "Степанов", "female": "Степанова" },
+      { "male": "Николаев", "female": "Николаева" },
+      { "male": "Орлов", "female": "Орлова" },
+      { "male": "Андреев", "female": "Андреева" },
+      { "male": "Макаров", "female": "Макарова" },
+      { "male": "Никитин", "female": "Никитина", "declension": "in" },
+      { "male": "Захаров", "female": "Захарова" },
+      { "male": "Зайцев", "female": "Зайцева" },
+      { "male": "Соловьёв", "female": "Соловьёва" },
+      { "male": "Борисов", "female": "Борисова" },
+      { "male": "Яковлев", "female": "Яковлева" },
+      { "male": "Григорьев", "female": "Григорьева" },
+      { "male": "Романов", "female": "Романова" },
+      { "male": "Воробьёв", "female": "Воробьёва" },
+      { "male": "Сергеев", "female": "Сергеева" },
+      { "male": "Кузьмин", "female": "Кузьмина", "declension": "in" },
+      { "male": "Фролов", "female": "Фролова" },
+      { "male": "Александров", "female": "Александрова" },
+      { "male": "Дмитриев", "female": "Дмитриева" },
+      { "male": "Королёв", "female": "Королёва" },
+      { "male": "Громов", "female": "Громова" },
+      { "male": "Ильин", "female": "Ильина", "declension": "in" },
+      { "male": "Козловский", "female": "Козловская", "declension": "sky" },
+      { "male": "Орловский", "female": "Орловская", "declension": "sky" },
+    ],
+  },
+}

src/HSchool.Server/mods/core/defs/namesets/slavic.jsonc

@@ -1,136 +0,0 @@
-{
-  "defName": "Slavic",
-  "patronymicRule": "slavic",
-  "defaultGivenDeclension": "hard",
-  "defaultSurnameDeclension": "ov",
-  "nativeLanguages": ["RussianLanguage", "BelarusianLanguage", "UkrainianLanguage"],
-  "relatedLanguageChance": 0.6,
-  "relatedLanguageMean": 22,
-  "relatedLanguageStdDev": 8,
-  "relatedLanguageMax": 40,
-  "maleGiven": [
-    { "form": "Александр" },
-    { "form": "Алексей" },
-    { "form": "Андрей" },
-    { "form": "Антон" },
-    { "form": "Артём" },
-    { "form": "Борис" },
-    { "form": "Вадим" },
-    { "form": "Валерий" },
-    { "form": "Виктор" },
-    { "form": "Виталий" },
-    { "form": "Владимир" },
-    { "form": "Владислав" },
-    { "form": "Григорий" },
-    { "form": "Денис" },
-    { "form": "Дмитрий" },
-    { "form": "Евгений" },
-    { "form": "Егор" },
-    { "form": "Иван" },
-    { "form": "Игорь", "declension": "soft" },
-    { "form": "Илья", "declension": "ya" },
-    { "form": "Кирилл" },
-    { "form": "Константин" },
-    { "form": "Максим" },
-    { "form": "Михаил" },
-    { "form": "Никита", "declension": "a" },
-    { "form": "Николай" },
-    { "form": "Олег" },
-    { "form": "Павел" },
-    { "form": "Пётр" },
-    { "form": "Роман" },
-    { "form": "Сергей" },
-    { "form": "Станислав" },
-    { "form": "Степан" },
-    { "form": "Фёдор" },
-    { "form": "Юрий" },
-  ],
-  "femaleGiven": [
-    { "form": "Александра", "declension": "a" },
-    { "form": "Алина", "declension": "a" },
-    { "form": "Анастасия", "declension": "iya" },
-    { "form": "Анна", "declension": "a" },
-    { "form": "Валентина", "declension": "a" },
-    { "form": "Валерия", "declension": "iya" },
-    { "form": "Вера", "declension": "a" },
-    { "form": "Виктория", "declension": "iya" },
-    { "form": "Дарья", "declension": "ya" },
-    { "form": "Екатерина", "declension": "a" },
-    { "form": "Елена", "declension": "a" },
-    { "form": "Елизавета", "declension": "a" },
-    { "form": "Ирина", "declension": "a" },
-    { "form": "Ксения", "declension": "iya" },
-    {
-      "form": "Любовь",
-      "cases": {
-        "nom": "Любовь",
-        "gen": "Любови",
-        "dat": "Любови",
-        "acc": "Любовь",
-        "ins": "Любовью",
-        "pre": "Любови",
-      },
-    },
-    { "form": "Людмила", "declension": "a" },
-    { "form": "Маргарита", "declension": "a" },
-    { "form": "Мария", "declension": "iya" },
-    { "form": "Надежда", "declension": "a" },
-    { "form": "Наталья", "declension": "ya" },
-    { "form": "Нина", "declension": "a" },
-    { "form": "Оксана", "declension": "a" },
-    { "form": "Ольга", "declension": "a" },
-    { "form": "Полина", "declension": "a" },
-    { "form": "Светлана", "declension": "a" },
-    { "form": "София", "declension": "iya" },
-    { "form": "Татьяна", "declension": "a" },
-    { "form": "Юлия", "declension": "iya" },
-    { "form": "Яна", "declension": "a" },
-    { "form": "Вероника", "declension": "a" },
-    { "form": "Диана", "declension": "a" },
-    { "form": "Марина", "declension": "a" },
-  ],
-  "surnames": [
-    { "male": "Иванов", "female": "Иванова" },
-    { "male": "Петров", "female": "Петрова" },
-    { "male": "Смирнов", "female": "Смирнова" },
-    { "male": "Кузнецов", "female": "Кузнецова" },
-    { "male": "Попов", "female": "Попова" },
-    { "male": "Васильев", "female": "Васильева" },
-    { "male": "Соколов", "female": "Соколова" },
-    { "male": "Михайлов", "female": "Михайлова" },
-    { "male": "Новиков", "female": "Новикова" },
-    { "male": "Фёдоров", "female": "Фёдорова" },
-    { "male": "Морозов", "female": "Морозова" },
-    { "male": "Волков", "female": "Волкова" },
-    { "male": "Алексеев", "female": "Алексеева" },
-    { "male": "Лебедев", "female": "Лебедева" },
-    { "male": "Семёнов", "female": "Семёнова" },
-    { "male": "Егоров", "female": "Егорова" },
-    { "male": "Павлов", "female": "Павлова" },
-    { "male": "Козлов", "female": "Козлова" },
-    { "male": "Степанов", "female": "Степанова" },
-    { "male": "Николаев", "female": "Николаева" },
-    { "male": "Орлов", "female": "Орлова" },
-    { "male": "Андреев", "female": "Андреева" },
-    { "male": "Макаров", "female": "Макарова" },
-    { "male": "Никитин", "female": "Никитина", "declension": "in" },
-    { "male": "Захаров", "female": "Захарова" },
-    { "male": "Зайцев", "female": "Зайцева" },
-    { "male": "Соловьёв", "female": "Соловьёва" },
-    { "male": "Борисов", "female": "Борисова" },
-    { "male": "Яковлев", "female": "Яковлева" },
-    { "male": "Григорьев", "female": "Григорьева" },
-    { "male": "Романов", "female": "Романова" },
-    { "male": "Воробьёв", "female": "Воробьёва" },
-    { "male": "Сергеев", "female": "Сергеева" },
-    { "male": "Кузьмин", "female": "Кузьмина", "declension": "in" },
-    { "male": "Фролов", "female": "Фролова" },
-    { "male": "Александров", "female": "Александрова" },
-    { "male": "Дмитриев", "female": "Дмитриева" },
-    { "male": "Королёв", "female": "Королёва" },
-    { "male": "Громов", "female": "Громова" },
-    { "male": "Ильин", "female": "Ильина", "declension": "in" },
-    { "male": "Козловский", "female": "Козловская", "declension": "sky" },
-    { "male": "Орловский", "female": "Орловская", "declension": "sky" },
-  ],
-}

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

@@ -144,7 +144,9 @@
   "Hunger": "Hunger",
   "Toilet": "Toilet",
   "Social": "Social",
-  "Slavic": "Slavic",
+  "Russia": "Russia",
+  "TemperateContinental": "Temperate continental",
+  "ContinentalCold": "Cold continental",
   "Build": "Build",
   "Skinny": "Skinny",
   "Average": "Average",

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

@@ -144,7 +144,9 @@
   "Hunger": "Голод",
   "Toilet": "Туалет",
   "Social": "Общение",
-  "Slavic": "Славянский",
+  "Russia": "Россия",
+  "TemperateContinental": "Умеренно-континентальный",
+  "ContinentalCold": "Континентальный холодный",
   "Build": "Телосложение",
   "Skinny": "Худощавое",
   "Average": "Обычное",

src/HSchool.Server/mods/example/README.md

@@ -10,7 +10,7 @@ example/
   pack.jsonc                 # version + requires: ["core"]
   localizations/{ru,en}.jsonc
   defs/traits/traits.jsonc   # two traits
-  defs/namesets/example.jsonc
+  defs/countries/example.jsonc
   defs/rooms/store.jsonc     # one placeable room
   defs/things/chair.jsonc    # last-wins: same defName as core
   patches/principals-office.jsonc

src/HSchool.Server/mods/example/defs/countries/example.jsonc

@@ -0,0 +1,20 @@
+{
+  "defName": "ExampleNames",
+  "climatePresets": ["TemperateContinental"],
+  "names": {
+    "patronymicRule": "slavic",
+    "defaultGivenDeclension": "hard",
+    "defaultSurnameDeclension": "ov",
+    "nativeLanguages": ["RussianLanguage"],
+    "relatedLanguageChance": 0,
+    "maleGiven": [
+      { "form": "Иван" },
+    ],
+    "femaleGiven": [
+      { "form": "Анна", "declension": "a" },
+    ],
+    "surnames": [
+      { "male": "Тестов", "female": "Тестова" },
+    ],
+  },
+}

src/HSchool.Server/mods/example/defs/namesets/example.jsonc

@@ -1,17 +0,0 @@
-{
-  "defName": "ExampleNames",
-  "patronymicRule": "slavic",
-  "defaultGivenDeclension": "hard",
-  "defaultSurnameDeclension": "ov",
-  "nativeLanguages": ["RussianLanguage"],
-  "relatedLanguageChance": 0,
-  "maleGiven": [
-    { "form": "Иван" },
-  ],
-  "femaleGiven": [
-    { "form": "Анна", "declension": "a" },
-  ],
-  "surnames": [
-    { "male": "Тестов", "female": "Тестова" },
-  ],
-}

src/HSchool.Simulation/School.cs

@@ -75,8 +75,11 @@ public sealed class School : IDisposable
 
     public int PeopleSeed { get; private set; }
 
-    /// <summary>Name pack used to generate this school's people. Needed again on 1 September.</summary>
+    /// <summary>Country used to generate this school's people. Needed again on 1 September.</summary>
-    public string? NameSetId { get; private set; }
+    public string? CountryId { get; private set; }
+
+    /// <summary>Climate preset rolled at birth. Phase 32 reads it; it cannot change on a live school.</summary>
+    public string? ClimatePresetId { get; private set; }
 
     /// <summary>Skill everyone generated for this school speaks natively.</summary>
     public string? NativeLanguage { get; private set; }
@@ -118,14 +121,15 @@ public sealed class School : IDisposable
     /// <summary>
     /// Installs a roster that already matches the map. Spawns entities; does not write to disk.
     /// </summary>
-    public void InstallPeople(Roster roster, int seed, string? nameSetId = null, ApplicantPool? applicants = null, string? nativeLanguage = null)
+    public void InstallPeople(Roster roster, int seed, string? countryId = null, ApplicantPool? applicants = null, string? nativeLanguage = null, string? climatePresetId = null)
     {
         ObjectDisposedException.ThrowIf(_disposed, this);
         ArgumentNullException.ThrowIfNull(roster);
 
         Roster = roster;
         PeopleSeed = seed;
-        NameSetId = nameSetId;
+        CountryId = countryId;
+        ClimatePresetId = climatePresetId;
         NativeLanguage = nativeLanguage;
         Applicants = applicants;
         RosterSpawner.Spawn(World, roster);
@@ -282,7 +286,7 @@ public sealed class School : IDisposable
 
     private bool TryYearlyIntake(DateTime before, DateTime after)
     {
-        if (Roster is null || Catalog is null || NameSetId is null)
+        if (Roster is null || Catalog is null || CountryId is null)
         {
             return false;
         }
@@ -290,7 +294,7 @@ public sealed class School : IDisposable
         var changed = false;
         foreach (var date in YearlyIntake.DatesBetween(before, after))
         {
-            Roster = YearlyIntake.Apply(Catalog, Roster, PeopleSeed, NameSetId, date, NativeLanguage);
+            Roster = YearlyIntake.Apply(Catalog, Roster, PeopleSeed, CountryId, date, NativeLanguage);
             changed = true;
         }
 
@@ -307,12 +311,12 @@ public sealed class School : IDisposable
 
     private bool TryApplicantRefresh()
     {
-        if (Applicants is null || Roster is null || Catalog is null || NameSetId is null || Catalog.StaffingRules is null)
+        if (Applicants is null || Roster is null || Catalog is null || CountryId is null || Catalog.StaffingRules is null)
         {
             return false;
         }
 
-        var next = Applicants.Advance(Catalog, Roster, PeopleSeed, NameSetId, Clock.Time, NativeLanguage);
+        var next = Applicants.Advance(Catalog, Roster, PeopleSeed, CountryId, Clock.Time, NativeLanguage);
         if (next.Week == Applicants.Week)
         {
             return false;

src/HSchool.Simulation/SchoolCreationError.cs

@@ -13,7 +13,7 @@ public enum SchoolCreationError
     InvalidMap,
     UnknownMod,
     InvalidCatalog,
-    UnknownNameSet,
+    UnknownCountry,
     UnknownNativeLanguage,
     MissingMod,
     ModCycle,

tests/HSchool.Ai.Tests/WalkingTests.cs

@@ -68,7 +68,7 @@ public class WalkingTests
     public void ComesToday_IsFalseOnSundayAndHolidays()
     {
         var (catalog, map) = Fixtures.Vanilla();
-        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Slavic", TuesdayLesson);
+        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Russia", TuesdayLesson);
         var pupil = roster.People.First(person => person.IsStudent);
         var schoolClass = roster.Classes.First(row => row.Id == pupil.ClassId);
         var table = new Timetable(
@@ -90,7 +90,7 @@ public class WalkingTests
     public void ClassWithoutLessons_StaysAway_TeacherWithAnotherClassComes()
     {
         var (catalog, map) = Fixtures.Vanilla();
-        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Slavic", TuesdayLesson);
+        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Russia", TuesdayLesson);
         var idle = roster.Classes[0];
         var busy = roster.Classes[1];
         var idlePupil = roster.People.First(person => person.Id == idle.PupilIds[0]);
@@ -117,7 +117,7 @@ public class WalkingTests
     {
         var (catalog, map) = Fixtures.Vanilla();
         var walks = WalkGraph.Build(catalog, map);
-        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 9, "Slavic", TuesdayLesson);
+        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 9, "Russia", TuesdayLesson);
         var pupil = roster.People.First(person => person.IsStudent);
         var schoolClass = roster.Classes.First(row => row.Id == pupil.ClassId);
         var table = new Timetable(

tests/HSchool.AppHost.Tests/ExamplePackTests.cs

@@ -28,8 +28,8 @@ public class ExamplePackTests(AppHostFixture fixture)
         Assert.Equal("Кабинет директора", Assert.Single(ru.Rooms, room => room.DefName == "PrincipalsOffice").Label);
         Assert.Equal("Кладовая", Assert.Single(ru.Rooms, room => room.DefName == "ExampleStore").Label);
         Assert.Equal("Storeroom", Assert.Single(en.Rooms, room => room.DefName == "ExampleStore").Label);
-        Assert.Equal("Примерные имена", Assert.Single(ru.NameSets, set => set.DefName == "ExampleNames").Label);
+        Assert.Equal("Примерные имена", Assert.Single(ru.Countries, set => set.DefName == "ExampleNames").Label);
-        Assert.Equal("Example names", Assert.Single(en.NameSets, set => set.DefName == "ExampleNames").Label);
+        Assert.Equal("Example names", Assert.Single(en.Countries, set => set.DefName == "ExampleNames").Label);
         Assert.Equal("yard", ru.DefaultMap.Territory?.Id);
     }
 
@@ -139,14 +139,14 @@ public class ExamplePackTests(AppHostFixture fixture)
         IReadOnlyList<DefInfoResponse> Floors,
         IReadOnlyList<RoomInfoResponse> Rooms,
         IReadOnlyList<DefInfoResponse> Things,
-        IReadOnlyList<NameSetInfoResponse> NameSets,
+        IReadOnlyList<CountryInfoResponse> Countries,
         DayFrameResponse? DayFrame,
         IReadOnlyList<HolidayInfoResponse> Holidays,
         MapLayoutResponse DefaultMap);
 
     private sealed record DefInfoResponse(string DefName, string Label);
 
-    private sealed record NameSetInfoResponse(string DefName, string Label);
+    private sealed record CountryInfoResponse(string DefName, string Label);
 
     private sealed record RoomInfoResponse(
         string DefName,

tests/HSchool.AppHost.Tests/SchoolApiTests.cs

@@ -278,13 +278,14 @@ public class SchoolApiTests(AppHostFixture fixture)
         Assert.Equal("Кабинет директора", Assert.Single(ru.Rooms, room => room.DefName == "PrincipalsOffice").Label);
         Assert.Equal("Principal's office", Assert.Single(en.Rooms, room => room.DefName == "PrincipalsOffice").Label);
         Assert.Equal("yard", ru.DefaultMap.Territory?.Id);
-        Assert.Equal("Славянский", Assert.Single(ru.NameSets, set => set.DefName == "Slavic").Label);
+        Assert.Equal("Россия", Assert.Single(ru.Countries, country => country.DefName == "Russia").Label);
-        Assert.Equal("Slavic", Assert.Single(en.NameSets, set => set.DefName == "Slavic").Label);
+        Assert.Equal("Russia", Assert.Single(en.Countries, country => country.DefName == "Russia").Label);
-        var slavic = Assert.Single(ru.NameSets, set => set.DefName == "Slavic");
+        var russia = Assert.Single(ru.Countries, country => country.DefName == "Russia");
         Assert.Equal(
             ["RussianLanguage", "BelarusianLanguage", "UkrainianLanguage"],
-            slavic.NativeLanguages.Select(language => language.DefName).ToArray());
+            russia.NativeLanguages.Select(language => language.DefName).ToArray());
-        Assert.Equal("Белорусский", Assert.Single(slavic.NativeLanguages, language => language.DefName == "BelarusianLanguage").Label);
+        Assert.Equal("Белорусский", Assert.Single(russia.NativeLanguages, language => language.DefName == "BelarusianLanguage").Label);
+        Assert.Equal(["TemperateContinental", "ContinentalCold"], russia.ClimatePresets);
         Assert.Equal("Начальные классы", Assert.Single(ru.Subjects, subject => subject.DefName == "PrimarySchool").Label);
         Assert.Equal("Primary", Assert.Single(en.Subjects, subject => subject.DefName == "PrimarySchool").Label);
         var classroom = Assert.Single(ru.Rooms, room => room.DefName == "Classroom");
@@ -396,7 +397,7 @@ public class SchoolApiTests(AppHostFixture fixture)
     }
 
     [Fact]
-    public async Task CreateSchool_WithAnUnknownNameSet_IsRejected()
+    public async Task CreateSchool_WithAnUnknownCountry_IsRejected()
     {
         using var client = fixture.App.CreateHttpClient("server");
         await ResetAsync(client);
@@ -405,14 +406,47 @@ public class SchoolApiTests(AppHostFixture fixture)
             "/api/schools",
             new
             {
-                name = "Чужие имена",
+                name = "Чужая страна",
                 startDate = ExpectedDefaultStart,
-                nameSetId = "NoSuchNames",
+                countryId = "NoSuchCountry",
             },
             TestContext.Current.CancellationToken);
 
         Assert.Equal(HttpStatusCode.BadRequest, response.StatusCode);
-        Assert.Equal("unknown-name-set", await ProblemCodeAsync(response));
+        Assert.Equal("unknown-country", await ProblemCodeAsync(response));
+    }
+
+    [Fact]
+    public async Task CreateSchool_WithRussiaAndNoLanguage_PicksTheSameNativeAsTheSeed()
+    {
+        using var client = fixture.App.CreateHttpClient("server");
+        await ResetAsync(client);
+        const int seed = 42;
+
+        var first = await CreateWithCountryAsync(client, "Страна А", ExpectedDefaultStart, "Russia", seed);
+        var second = await CreateWithCountryAsync(client, "Страна Б", ExpectedDefaultStart, "Russia", seed);
+
+        var firstSave = await ReadSchoolSaveAsync(client, first.Id);
+        var secondSave = await ReadSchoolSaveAsync(client, second.Id);
+        Assert.Equal("Russia", firstSave.CountryId);
+        Assert.Equal(firstSave.NativeLanguage, secondSave.NativeLanguage);
+        Assert.Contains(firstSave.NativeLanguage, new[] { "RussianLanguage", "BelarusianLanguage", "UkrainianLanguage" });
+    }
+
+    [Fact]
+    public async Task CreateSchool_WithTheSameSeed_GetsTheSameClimatePreset()
+    {
+        using var client = fixture.App.CreateHttpClient("server");
+        await ResetAsync(client);
+        const int seed = 20260818;
+
+        var first = await CreateWithCountryAsync(client, "Климат А", ExpectedDefaultStart, "Russia", seed);
+        var second = await CreateWithCountryAsync(client, "Климат Б", ExpectedDefaultStart, "Russia", seed);
+
+        var firstSave = await ReadSchoolSaveAsync(client, first.Id);
+        var secondSave = await ReadSchoolSaveAsync(client, second.Id);
+        Assert.Equal(firstSave.ClimatePresetId, secondSave.ClimatePresetId);
+        Assert.Contains(firstSave.ClimatePresetId, new[] { "TemperateContinental", "ContinentalCold" });
     }
 
     [Fact]
@@ -427,7 +461,7 @@ public class SchoolApiTests(AppHostFixture fixture)
             {
                 name = "Чужой язык",
                 startDate = ExpectedDefaultStart,
-                nameSetId = "Slavic",
+                countryId = "Russia",
                 nativeLanguage = "Klingon",
             },
             TestContext.Current.CancellationToken);
@@ -521,6 +555,46 @@ public class SchoolApiTests(AppHostFixture fixture)
         return created;
     }
 
+    private static async Task<SchoolResponse> CreateWithCountryAsync(
+        HttpClient client,
+        string name,
+        DateTime startDate,
+        string countryId,
+        int seed)
+    {
+        using var response = await client.PostAsJsonAsync(
+            "/api/schools",
+            new { name, startDate, countryId, seed },
+            TestContext.Current.CancellationToken);
+        response.EnsureSuccessStatusCode();
+        var created = await response.Content.ReadFromJsonAsync<SchoolResponse>(TestContext.Current.CancellationToken);
+        Assert.NotNull(created);
+        return created;
+    }
+
+    private static async Task<SchoolSaveFile> ReadSchoolSaveAsync(HttpClient client, int id)
+    {
+        var directory = await SavesDirectoryAsync(client);
+        var json = await File.ReadAllTextAsync(Path.Combine(directory, $"{id}.json"), TestContext.Current.CancellationToken);
+        var save = System.Text.Json.JsonSerializer.Deserialize<SchoolSaveFile>(
+            json,
+            new System.Text.Json.JsonSerializerOptions { PropertyNameCaseInsensitive = true });
+        Assert.NotNull(save);
+        return save;
+    }
+
+    private static async Task<string> SavesDirectoryAsync(HttpClient client)
+    {
+        var payload = await client.GetFromJsonAsync<PathResponse>(
+            "/api/dev/saves-directory",
+            TestContext.Current.CancellationToken);
+        Assert.NotNull(payload);
+        Assert.False(string.IsNullOrWhiteSpace(payload.Path));
+        return payload.Path;
+    }
+
+    private sealed record SchoolSaveFile(string? CountryId, string? ClimatePresetId, string? NativeLanguage);
+
     internal static readonly object SimpleCustomMap = new
     {
         territory = new { id = "yard", def = "SchoolYard" },
@@ -626,7 +700,7 @@ public class SchoolApiTests(AppHostFixture fixture)
         IReadOnlyList<DefInfoResponse> Floors,
         IReadOnlyList<RoomInfoResponse> Rooms,
         IReadOnlyList<DefInfoResponse> Things,
-        IReadOnlyList<NameSetInfoResponse> NameSets,
+        IReadOnlyList<CountryInfoResponse> Countries,
         IReadOnlyList<SubjectInfoResponse> Subjects,
         DayFrameResponse? DayFrame,
         IReadOnlyList<HolidayInfoResponse> Holidays,
@@ -634,10 +708,11 @@ public class SchoolApiTests(AppHostFixture fixture)
 
     private sealed record DefInfoResponse(string DefName, string Label);
 
-    private sealed record NameSetInfoResponse(
+    private sealed record CountryInfoResponse(
         string DefName,
         string Label,
-        IReadOnlyList<DefInfoResponse> NativeLanguages);
+        IReadOnlyList<DefInfoResponse> NativeLanguages,
+        IReadOnlyList<string> ClimatePresets);
 
     private sealed record RoomInfoResponse(
         string DefName,

tests/HSchool.AppHost.Tests/ServiceabilityTests.cs

@@ -37,6 +37,34 @@ public class ServiceabilityTests(AppHostFixture fixture)
         }
     }
 
+    [Fact]
+    public async Task CurrentFormatSave_WithoutCountryId_LeavesTheSchoolUnstartedAndTheFileUntouched()
+    {
+        using var client = fixture.App.CreateHttpClient("server");
+        await SchoolApiTests.ResetAsync(client);
+        var directory = await SavesDirectoryAsync(client);
+
+        try
+        {
+            InstallGolden(directory, "current");
+            var path = Path.Combine(directory, "1.json");
+            BumpFormat(path, 3);
+            var before = File.ReadAllBytes(path);
+
+            using var reload = await client.PostAsync("/api/dev/reload-schools", content: null, TestContext.Current.CancellationToken);
+            reload.EnsureSuccessStatusCode();
+
+            Assert.Empty((await SchoolApiTests.GetSchoolsAsync(client)).Schools);
+            Assert.Equal(before, File.ReadAllBytes(path));
+        }
+        finally
+        {
+            DeleteSchoolFiles(directory, 1);
+            using var cleanup = await client.PostAsync("/api/dev/reload-schools", content: null, TestContext.Current.CancellationToken);
+            cleanup.EnsureSuccessStatusCode();
+        }
+    }
+
     [Fact]
     public async Task CurrentFormatSave_LoadsAsBefore()
     {

tests/HSchool.Content.Tests/CountryDefTests.cs

@@ -0,0 +1,81 @@
+namespace HSchool.Content.Tests;
+
+public class CountryDefTests
+{
+    private readonly CatalogLoader _loader = new();
+
+    [Fact]
+    public void VanillaCore_LoadsRussiaAndClimatePresets()
+    {
+        var root = Path.Combine(AppContext.BaseDirectory, "vanilla");
+        var catalog = _loader.Load([CatalogLoader.CorePackId], PackDocuments.FromDirectory(CatalogLoader.CorePackId, root));
+
+        Assert.True(catalog.Countries.ContainsKey("Russia"));
+        Assert.False(catalog.Countries.ContainsKey("Slavic"));
+        var russia = catalog.Countries["Russia"];
+        Assert.Equal(
+            ["RussianLanguage", "BelarusianLanguage", "UkrainianLanguage"],
+            russia.Names.Spoken);
+        Assert.Equal(0.6f, russia.Names.RelatedLanguageChance);
+        Assert.Equal(40, russia.Names.RelatedLanguageMax);
+        Assert.True(russia.Names.MaleGiven.Count >= 20);
+        Assert.Equal(["TemperateContinental", "ContinentalCold"], russia.ClimatePresets);
+        Assert.True(catalog.ClimatePresets.ContainsKey("TemperateContinental"));
+        Assert.True(catalog.ClimatePresets.ContainsKey("ContinentalCold"));
+        Assert.Equal("Россия", catalog.Label("ru", russia));
+        Assert.Equal("Russia", catalog.Label("en", russia));
+    }
+
+    [Fact]
+    public void CountryWithoutNames_FailsTheCatalog()
+    {
+        var ex = Assert.Throws<ContentLoadException>(() => _loader.Load(
+            [CatalogLoader.CorePackId],
+            [
+                PackDocuments.Def(
+                    CatalogLoader.CorePackId,
+                    "climates",
+                    "temperate",
+                    """{ "defName": "TemperateContinental" }"""),
+                PackDocuments.Def(
+                    CatalogLoader.CorePackId,
+                    "countries",
+                    "ghost",
+                    """{ "defName": "GhostLand", "climatePresets": ["TemperateContinental"] }"""),
+            ]));
+
+        Assert.Contains("GhostLand", ex.Message, StringComparison.Ordinal);
+        Assert.Contains("names", ex.Message, StringComparison.OrdinalIgnoreCase);
+    }
+
+    [Fact]
+    public void CountryWithUnknownPreset_FailsTheCatalog()
+    {
+        var ex = Assert.Throws<ContentLoadException>(() => _loader.Load(
+            [CatalogLoader.CorePackId],
+            [
+                PackDocuments.Def(
+                    CatalogLoader.CorePackId,
+                    "climates",
+                    "temperate",
+                    """{ "defName": "TemperateContinental" }"""),
+                PackDocuments.Def(
+                    CatalogLoader.CorePackId,
+                    "countries",
+                    "ghost",
+                    """
+                    {
+                      "defName": "GhostLand",
+                      "climatePresets": ["NoSuchClimate"],
+                      "names": {
+                        "maleGiven": [{ "form": "Иван" }],
+                        "femaleGiven": [{ "form": "Анна", "declension": "a" }],
+                        "surnames": [{ "male": "Иванов", "female": "Иванова" }]
+                      }
+                    }
+                    """),
+            ]));
+
+        Assert.Contains("NoSuchClimate", ex.Message, StringComparison.Ordinal);
+    }
+}

tests/HSchool.Content.Tests/ExamplePackTests.cs

@@ -40,12 +40,12 @@ public class ExamplePackTests
 
         Assert.True(catalog.Traits.ContainsKey("ExampleEarlyRiser"));
         Assert.True(catalog.Traits.ContainsKey("ExampleNightOwl"));
-        Assert.True(catalog.NameSets.ContainsKey("ExampleNames"));
+        Assert.True(catalog.Countries.ContainsKey("ExampleNames"));
         Assert.True(catalog.Rooms.ContainsKey("ExampleStore"));
         Assert.Equal("Кладовая", catalog.Label("ru", catalog.Rooms["ExampleStore"]));
         Assert.Equal("Storeroom", catalog.Label("en", catalog.Rooms["ExampleStore"]));
-        Assert.Equal("Примерные имена", catalog.Label("ru", catalog.NameSets["ExampleNames"]));
+        Assert.Equal("Примерные имена", catalog.Label("ru", catalog.Countries["ExampleNames"]));
-        Assert.Equal(["RussianLanguage"], catalog.NameSets["ExampleNames"].Spoken.ToArray());
+        Assert.Equal(["RussianLanguage"], catalog.Countries["ExampleNames"].Names.Spoken.ToArray());
         Assert.True(catalog.Rooms.ContainsKey("PrincipalsOffice"));
         Assert.Equal("Кабинет директора", catalog.Label("ru", catalog.Rooms["PrincipalsOffice"]));
     }

tests/HSchool.Content.Tests/PeopleDefTests.cs

@@ -25,15 +25,15 @@ public class PeopleDefTests
         Assert.Equal(0.4f, catalog.Skills["English"].AdultChance);
         Assert.Equal(
             ["RussianLanguage", "BelarusianLanguage", "UkrainianLanguage"],
-            catalog.NameSets["Slavic"].Spoken);
+            catalog.Countries["Russia"].Names.Spoken);
-        Assert.Equal(0.6f, catalog.NameSets["Slavic"].RelatedLanguageChance);
+        Assert.Equal(0.6f, catalog.Countries["Russia"].Names.RelatedLanguageChance);
-        Assert.Equal(40, catalog.NameSets["Slavic"].RelatedLanguageMax);
+        Assert.Equal(40, catalog.Countries["Russia"].Names.RelatedLanguageMax);
         Assert.Contains(catalog.Subjects["ForeignLanguage"].Skills, share => share.Skill == "English");
         Assert.False(catalog.Skills.ContainsKey("ForeignLanguage"));
-        Assert.True(catalog.NameSets.ContainsKey("Slavic"));
+        Assert.True(catalog.Countries.ContainsKey("Russia"));
-        Assert.True(catalog.NameSets["Slavic"].MaleGiven.Count >= 20);
+        Assert.True(catalog.Countries["Russia"].Names.MaleGiven.Count >= 20);
-        Assert.Equal("Славянский", catalog.Label("ru", catalog.NameSets["Slavic"]));
+        Assert.Equal("Россия", catalog.Label("ru", catalog.Countries["Russia"]));
-        Assert.Equal("Slavic", catalog.Label("en", catalog.NameSets["Slavic"]));
+        Assert.Equal("Russia", catalog.Label("en", catalog.Countries["Russia"]));
         Assert.Equal("Усидчивый", catalog.Label("ru", catalog.Traits["Diligent"]));
         Assert.True(catalog.Subjects.ContainsKey("PrimarySchool"));
         Assert.NotNull(catalog.StaffingRules);
@@ -213,7 +213,7 @@ public class PeopleDefTests
     }
 
     [Fact]
-    public void ExtraPack_AddsANameSetAndTrait()
+    public void ExtraPack_AddsACountryAndTrait()
     {
         var catalog = _loader.Load(
             [CatalogLoader.CorePackId, "addon"],
@@ -221,37 +221,48 @@ public class PeopleDefTests
                 PackDocuments.Def(CatalogLoader.CorePackId, "traits", "kind", """{ "defName": "Kind", "weight": 1 }"""),
                 PackDocuments.Def(
                     CatalogLoader.CorePackId,
-                    "namesets",
+                    "climates",
-                    "slavic",
+                    "temperate",
+                    """{ "defName": "TemperateContinental" }"""),
+                PackDocuments.Def(
+                    CatalogLoader.CorePackId,
+                    "countries",
+                    "russia",
                     """
                     {
-                      "defName": "Slavic",
+                      "defName": "Russia",
-                      "maleGiven": [{ "form": "Иван" }],
+                      "climatePresets": ["TemperateContinental"],
-                      "femaleGiven": [{ "form": "Анна", "declension": "a" }],
+                      "names": {
-                      "surnames": [{ "male": "Иванов", "female": "Иванова" }]
+                        "maleGiven": [{ "form": "Иван" }],
+                        "femaleGiven": [{ "form": "Анна", "declension": "a" }],
+                        "surnames": [{ "male": "Иванов", "female": "Иванова" }]
+                      }
                     }
                     """),
                 PackDocuments.Def("addon", "traits", "stoic", """{ "defName": "Stoic", "weight": 3 }"""),
                 PackDocuments.Def("addon", "traits", "cheerful", """{ "defName": "Cheerful", "weight": 2 }"""),
                 PackDocuments.Def(
                     "addon",
-                    "namesets",
+                    "countries",
                     "nordic",
                     """
                     {
                       "defName": "Nordic",
-                      "maleGiven": [{ "form": "Lars", "declension": "indeclinable" }],
+                      "climatePresets": ["TemperateContinental"],
-                      "femaleGiven": [{ "form": "Ingrid", "declension": "indeclinable" }],
+                      "names": {
-                      "surnames": [{ "male": "Berg", "female": "Berg", "declension": "indeclinable" }]
+                        "maleGiven": [{ "form": "Lars", "declension": "indeclinable" }],
+                        "femaleGiven": [{ "form": "Ingrid", "declension": "indeclinable" }],
+                        "surnames": [{ "male": "Berg", "female": "Berg", "declension": "indeclinable" }]
+                      }
                     }
                     """),
                 PackDocuments.Locale("addon", "ru", """{ "Nordic": "Северный", "Stoic": "Стоик", "Cheerful": "Жизнерадостный" }"""),
             ]);
 
-        Assert.True(catalog.NameSets.ContainsKey("Nordic"));
+        Assert.True(catalog.Countries.ContainsKey("Nordic"));
         Assert.True(catalog.Traits.ContainsKey("Stoic"));
         Assert.True(catalog.Traits.ContainsKey("Cheerful"));
-        Assert.Equal("Северный", catalog.Label("ru", catalog.NameSets["Nordic"]));
+        Assert.Equal("Северный", catalog.Label("ru", catalog.Countries["Nordic"]));
         Assert.Equal("Стоик", catalog.Label("ru", catalog.Traits["Stoic"]));
     }
 }

tests/HSchool.Content.Tests/VanillaCoreTests.cs

@@ -128,7 +128,8 @@ public class VanillaCoreTests
         keys.AddRange(Names(catalog.Traits.Values));
         keys.AddRange(Names(catalog.BodyAttributes.Values));
         keys.AddRange(Names(catalog.Needs.Values));
-        keys.AddRange(Names(catalog.NameSets.Values));
+        keys.AddRange(Names(catalog.Countries.Values));
+        keys.AddRange(Names(catalog.ClimatePresets.Values));
         keys.AddRange(Names(catalog.Subjects.Values));
         keys.AddRange(Names(catalog.Staffing.Values));
         keys.AddRange(Names(catalog.DayFrames.Values));

tests/HSchool.People.Tests/ApplicantPoolTests.cs

@@ -17,7 +17,7 @@ public class ApplicantPoolTests
     {
         var roster = Fixtures.Generate(Fixtures.VanillaMap());
         var first = Create(roster);
-        var next = first.Advance(Fixtures.Catalog(), roster, Fixtures.SchoolSeed, "Slavic", Fixtures.AsOf.AddDays(7));
+        var next = first.Advance(Fixtures.Catalog(), roster, Fixtures.SchoolSeed, "Russia", Fixtures.AsOf.AddDays(7));
 
         Assert.NotEqual(first.Week, next.Week);
         var stayed = first.Applicants
@@ -45,12 +45,12 @@ public class ApplicantPoolTests
         var roster = Fixtures.Generate(Fixtures.VanillaMap());
         var size = catalog.StaffingRules!.PoolSize;
         var asOf = Fixtures.AsOf;
-        var pool = ApplicantPool.Create(catalog, roster, Fixtures.SchoolSeed, "Slavic", asOf);
+        var pool = ApplicantPool.Create(catalog, roster, Fixtures.SchoolSeed, "Russia", asOf);
 
         for (var week = 0; week < 50; week++)
         {
             asOf = asOf.AddDays(7);
-            pool = pool.Advance(catalog, roster, Fixtures.SchoolSeed, "Slavic", asOf);
+            pool = pool.Advance(catalog, roster, Fixtures.SchoolSeed, "Russia", asOf);
             Assert.Equal(size, pool.Applicants.Count);
         }
     }
@@ -94,7 +94,7 @@ public class ApplicantPoolTests
         for (var seed = 1; seed <= 20 && pool is null; seed++)
         {
             var candidate = Fixtures.Generate(Fixtures.VanillaMap(), seed);
-            var created = ApplicantPool.Create(Fixtures.Catalog(), candidate, seed, "Slavic", Fixtures.AsOf);
+            var created = ApplicantPool.Create(Fixtures.Catalog(), candidate, seed, "Russia", Fixtures.AsOf);
             if (created.Applicants.Any(applicant => candidate.People.Any(person => person.Id == applicant.Person.Id)))
             {
                 roster = candidate;
@@ -132,7 +132,7 @@ public class ApplicantPoolTests
     }
 
     private static ApplicantPool Create(Roster roster) =>
-        ApplicantPool.Create(Fixtures.Catalog(), roster, Fixtures.SchoolSeed, "Slavic", Fixtures.AsOf);
+        ApplicantPool.Create(Fixtures.Catalog(), roster, Fixtures.SchoolSeed, "Russia", Fixtures.AsOf);
 
     private static string Snapshot(ApplicantPool pool) =>
         string.Join('\n', pool.Applicants.Select(applicant =>

tests/HSchool.People.Tests/Fixtures.cs

@@ -96,7 +96,7 @@ internal static class Fixtures
     }
 
     public static Roster Generate(MapLayout map, int seed = SchoolSeed) =>
-        RosterGenerator.Generate(Catalog(), map, seed, "Slavic", AsOf, "RussianLanguage");
+        RosterGenerator.Generate(Catalog(), map, seed, "Russia", AsOf, "RussianLanguage");
 
     public static string RepoRoot()
     {

tests/HSchool.People.Tests/GoldenRosterTests.cs

@@ -8,7 +8,7 @@ public class GoldenRosterTests
     public void GoldenRoster_MatchesFixture()
     {
         var roster = Fixtures.Generate(Fixtures.Classrooms(4));
-        var actual = RosterFingerprint.Format(roster, Fixtures.SchoolSeed, "Slavic", Native);
+        var actual = RosterFingerprint.Format(roster, Fixtures.SchoolSeed, "Russia", Native);
         var relative = Path.Combine("golden", "roster.txt");
         var output = Path.Combine(AppContext.BaseDirectory, relative);
         var source = Path.Combine(Fixtures.RepoRoot(), "tests", "HSchool.People.Tests", relative);

tests/HSchool.People.Tests/GoldenSaveDump.cs

@@ -21,8 +21,8 @@ public class GoldenSaveDump
 
         var catalog = Fixtures.Catalog();
         var map = TwoClassrooms();
-        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Slavic", Fixtures.AsOf, "RussianLanguage");
+        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Russia", Fixtures.AsOf, "RussianLanguage");
-        var pool = ApplicantPool.Create(catalog, roster, schoolSeed: 1, "Slavic", Fixtures.AsOf, "RussianLanguage");
+        var pool = ApplicantPool.Create(catalog, roster, schoolSeed: 1, "Russia", Fixtures.AsOf, "RussianLanguage");
         var people = RosterJson.Serialize(RosterDocument.From(1, roster, pool));
         var mapNode = JsonNode.Parse(JsonSerializer.Serialize(map, Jsonc.SerializerOptions));
         var current = SchoolJson(mapNode, includeNative: true);

tests/HSchool.People.Tests/ReviewFixTests.cs

@@ -69,7 +69,7 @@ public class ReviewFixTests
         for (var year = 0; year < 4; year++)
         {
             var before = roster.People.ToDictionary(person => person.Id, StringComparer.Ordinal);
-            roster = YearlyIntake.Apply(catalog, roster, Fixtures.SchoolSeed, "Slavic", date);
+            roster = YearlyIntake.Apply(catalog, roster, Fixtures.SchoolSeed, "Russia", date);
             date = date.AddYears(1);
 
             foreach (var person in roster.People)
@@ -98,7 +98,7 @@ public class ReviewFixTests
             catalog,
             roster,
             Fixtures.SchoolSeed,
-            "Slavic",
+            "Russia",
             new DateTime(2012, 9, 1, 0, 0, 0, DateTimeKind.Utc));
 
         // Every seat an intake fills is a first-year seat, so a brand-new family that took two or
@@ -153,7 +153,7 @@ public class ReviewFixTests
     public void AChildOfASingleMother_StillCarriesTheFathersSurnameAndPatronymic()
     {
         var catalog = Fixtures.Catalog();
-        var names = catalog.NameSets["Slavic"];
+        var names = catalog.Countries["Russia"].Names;
         var roster = Fixtures.Generate(Fixtures.Classrooms(11));
         var people = roster.People.ToDictionary(person => person.Id, StringComparer.Ordinal);
 
@@ -180,7 +180,7 @@ public class ReviewFixTests
     public void ASingleMotherFamily_CanStillTakeInAYoungerSibling()
     {
         var catalog = Fixtures.Catalog();
-        var names = catalog.NameSets["Slavic"];
+        var names = catalog.Countries["Russia"].Names;
         var roster = Fixtures.Generate(Fixtures.Classrooms(11));
         var people = roster.People.ToDictionary(person => person.Id, StringComparer.Ordinal);
         var motherOnly = roster.Families

tests/HSchool.People.Tests/RosterFingerprint.cs

@@ -6,11 +6,11 @@ namespace HSchool.People.Tests;
 /// </summary>
 internal static class RosterFingerprint
 {
-    public static string Format(Roster roster, int seed, string nameSet, string native)
+    public static string Format(Roster roster, int seed, string country, string native)
     {
         var lines = new List<string>
         {
-            $"# seed={seed} nameset={nameSet} native={native} people={roster.People.Count} classes={roster.Classes.Count}",
+            $"# seed={seed} country={country} native={native} people={roster.People.Count} classes={roster.Classes.Count}",
         };
 
         foreach (var schoolClass in roster.Classes.OrderBy(row => row.Id, StringComparer.Ordinal))

tests/HSchool.People.Tests/RosterGeneratorTests.cs

@@ -3,7 +3,7 @@ namespace HSchool.People.Tests;
 public class RosterGeneratorTests
 {
     [Fact]
-    public void SameSeedMapAndNameSet_YieldTheSameRoster()
+    public void SameSeedMapAndCountry_YieldTheSameRoster()
     {
         var map = Fixtures.Classrooms(4);
         var a = Fixtures.Generate(map);

tests/HSchool.People.Tests/SkillGrantTests.cs

@@ -70,11 +70,11 @@ public class SkillGrantTests
             catalog,
             Fixtures.Classrooms(11),
             Fixtures.SchoolSeed,
-            "Slavic",
+            "Russia",
             Fixtures.AsOf,
             "BelarusianLanguage");
 
-        var max = catalog.NameSets["Slavic"].RelatedLanguageMax;
+        var max = catalog.Countries["Russia"].Names.RelatedLanguageMax;
         Assert.All(
             roster.People,
             person =>
@@ -97,7 +97,7 @@ public class SkillGrantTests
     public void RelatedLanguages_AreCommonAndStayLow()
     {
         var catalog = Fixtures.Catalog();
-        var max = catalog.NameSets["Slavic"].RelatedLanguageMax;
+        var max = catalog.Countries["Russia"].Names.RelatedLanguageMax;
         var roster = Fixtures.Generate(Fixtures.Classrooms(11));
         Assert.Contains(
             roster.People,
@@ -138,7 +138,7 @@ public class SkillGrantTests
     [Fact]
     public void ReloadWithoutASavedPick_TakesTheFirstLanguageInsteadOfRolling()
     {
-        var names = Fixtures.Catalog().NameSets["Slavic"];
+        var names = Fixtures.Catalog().Countries["Russia"].Names;
         Assert.True(names.Spoken.Count > 1, "this pins behaviour that only matters for a multi-language set");
 
         foreach (var seed in new[] { 1, 2, 7, 20260818 })
@@ -164,8 +164,8 @@ public class SkillGrantTests
     public void OmittedNativeLanguage_IsStableForTheSameSeed()
     {
         var map = Fixtures.Classrooms(2);
-        var a = RosterGenerator.Generate(Fixtures.Catalog(), map, 7, "Slavic", Fixtures.AsOf);
+        var a = RosterGenerator.Generate(Fixtures.Catalog(), map, 7, "Russia", Fixtures.AsOf);
-        var b = RosterGenerator.Generate(Fixtures.Catalog(), map, 7, "Slavic", Fixtures.AsOf);
+        var b = RosterGenerator.Generate(Fixtures.Catalog(), map, 7, "Russia", Fixtures.AsOf);
         Assert.Equal(
             a.People.Select(person => string.Join(',', person.Skills.Keys.Order(StringComparer.Ordinal))),
             b.People.Select(person => string.Join(',', person.Skills.Keys.Order(StringComparer.Ordinal))));
@@ -195,7 +195,7 @@ public class SkillGrantTests
             catalog,
             before,
             Fixtures.SchoolSeed,
-            "Slavic",
+            "Russia",
             new DateTime(2012, 9, 1, 0, 0, 0, DateTimeKind.Utc));
         var grown = after.People.First(person => person.Id == pupil.Id);
         Assert.True(grown.ClassId is { } classId && after.Classes.Any(schoolClass =>

tests/HSchool.People.Tests/StaffingTests.cs

@@ -178,7 +178,7 @@ public class StaffingTests
         for (var seed = 1; seed <= 30 && pool is null; seed++)
         {
             var candidate = Fixtures.Generate(map, seed);
-            var created = ApplicantPool.Create(catalog, candidate, seed, "Slavic", Fixtures.AsOf);
+            var created = ApplicantPool.Create(catalog, candidate, seed, "Russia", Fixtures.AsOf);
             var rosterIds = candidate.People.Select(person => person.Id).ToHashSet(StringComparer.Ordinal);
             var parentHere = created.Applicants.FirstOrDefault(applicant => rosterIds.Contains(applicant.Person.Id));
             var generatedHere = created.Applicants.FirstOrDefault(applicant => applicant.Person.Id.StartsWith('a'));
@@ -292,7 +292,7 @@ public class StaffingTests
         var catalog = Fixtures.Catalog();
         var map = Fixtures.VanillaMap();
         var roster = Fixtures.Generate(map);
-        var pool = ApplicantPool.Create(catalog, roster, Fixtures.SchoolSeed, "Slavic", Fixtures.AsOf);
+        var pool = ApplicantPool.Create(catalog, roster, Fixtures.SchoolSeed, "Russia", Fixtures.AsOf);
         return (catalog, map, roster, pool);
     }
 

tests/HSchool.People.Tests/YearlyIntakeTests.cs

@@ -23,7 +23,7 @@ public class YearlyIntakeTests
         Assert.Equal(4, before.Classes.Max(schoolClass => schoolClass.Year));
         Assert.DoesNotContain(before.Classes, schoolClass => schoolClass.Year == 11);
 
-        var after = YearlyIntake.Apply(catalog, before, Fixtures.SchoolSeed, "Slavic", September);
+        var after = YearlyIntake.Apply(catalog, before, Fixtures.SchoolSeed, "Russia", September);
         var demand = SchoolDemand.From(catalog, map);
 
         Assert.True(RosterFit.Matches(after, demand));
@@ -46,8 +46,8 @@ public class YearlyIntakeTests
         var map = Fixtures.Classrooms(4);
         var catalog = Fixtures.Catalog();
         var before = Fixtures.Generate(map);
-        var a = Snapshot(YearlyIntake.Apply(catalog, before, Fixtures.SchoolSeed, "Slavic", September));
+        var a = Snapshot(YearlyIntake.Apply(catalog, before, Fixtures.SchoolSeed, "Russia", September));
-        var b = Snapshot(YearlyIntake.Apply(catalog, before, Fixtures.SchoolSeed, "Slavic", September));
+        var b = Snapshot(YearlyIntake.Apply(catalog, before, Fixtures.SchoolSeed, "Russia", September));
         Assert.Equal(a, b);
     }
 
@@ -57,7 +57,7 @@ public class YearlyIntakeTests
         var map = Fixtures.Classrooms(4);
         var catalog = Fixtures.Catalog();
         var before = Fixtures.Generate(map);
-        var after = YearlyIntake.Apply(catalog, before, Fixtures.SchoolSeed, "Slavic", September);
+        var after = YearlyIntake.Apply(catalog, before, Fixtures.SchoolSeed, "Russia", September);
         var people = after.People.ToDictionary(person => person.Id, StringComparer.Ordinal);
         var yearOf = after.Classes.ToDictionary(schoolClass => schoolClass.Id, schoolClass => schoolClass.Year, StringComparer.Ordinal);
 
@@ -106,7 +106,7 @@ public class YearlyIntakeTests
             }
         }
 
-        var after = YearlyIntake.Apply(catalog, before, Fixtures.SchoolSeed, "Slavic", September);
+        var after = YearlyIntake.Apply(catalog, before, Fixtures.SchoolSeed, "Russia", September);
         var afterIds = after.People.Select(person => person.Id).ToHashSet(StringComparer.Ordinal);
         Assert.NotEmpty(shouldLeave);
         Assert.All(shouldLeave, id => Assert.DoesNotContain(id, afterIds));

tests/HSchool.People.Tests/golden/roster.txt

@@ -1,4 +1,4 @@
-# seed=20260818 nameset=Slavic native=RussianLanguage people=130 classes=4
+# seed=20260818 country=Russia native=RussianLanguage people=130 classes=4
 class class-classroom-00 year=1 letter=А room=classroom-00 capacity=16 pupils=f1.c1,f1.c2,f13.c0,f18.c0,f19.c0,f24.c1,f26.c1,f27.c1,f27.c2,f28.c2,f32.c1,f33.c0,f34.c0,f6.c0,f6.c2,f8.c0
 class class-classroom-01 year=2 letter=А room=classroom-01 capacity=16 pupils=f0.c1,f12.c0,f12.c1,f12.c2,f13.c1,f13.c2,f14.c2,f20.c0,f23.c1,f26.c0,f27.c0,f29.c0,f31.c0,f4.c0,f7.c0,f9.c0
 class class-classroom-02 year=3 letter=А room=classroom-02 capacity=16 pupils=f10.c0,f14.c0,f16.c0,f17.c1,f2.c0,f21.c0,f22.c1,f23.c0,f25.c0,f28.c0,f3.c0,f3.c1,f32.c0,f32.c2,f5.c0,f6.c1

tests/HSchool.Simulation.Tests/DecisionTests.cs

@@ -172,12 +172,12 @@ public class DecisionTests
     private static (School School, string Homeroom, string PupilId) TwoHomeroomLessons()
     {
         var (catalog, map) = Vanilla();
-        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Slavic", TuesdayMorning);
+        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Russia", TuesdayMorning);
-        var pool = ApplicantPool.Create(catalog, roster, schoolSeed: 1, "Slavic", TuesdayMorning);
+        var pool = ApplicantPool.Create(catalog, roster, schoolSeed: 1, "Russia", TuesdayMorning);
         var schoolClass = roster.Classes.First(row =>
             row.RoomId is "classroom-101" or "classroom-102" or "classroom-103" or "classroom-104");
         var school = School.Create(1, "Два урока", TuesdayMorning, catalog, map);
-        school.InstallPeople(roster, seed: 1, "Slavic", pool);
+        school.InstallPeople(roster, seed: 1, "Russia", pool);
         school.SetTimetable(new Timetable(
             [
                 new LessonPlacement(schoolClass.Id, "Mathematics", "t1", schoolClass.RoomId, Day: 1, Period: 1),
@@ -193,12 +193,12 @@ public class DecisionTests
 
     private static School OpenStaffed(DefCatalog catalog, MapLayout map, int seed)
     {
-        var roster = RosterGenerator.Generate(catalog, map, seed, "Slavic", TuesdayMorning);
+        var roster = RosterGenerator.Generate(catalog, map, seed, "Russia", TuesdayMorning);
-        var pool = ApplicantPool.Create(catalog, roster, seed, "Slavic", TuesdayMorning);
+        var pool = ApplicantPool.Create(catalog, roster, seed, "Russia", TuesdayMorning);
         var schoolClass = roster.Classes.First(row =>
             row.RoomId is "classroom-101" or "classroom-102" or "classroom-103" or "classroom-104");
         var school = School.Create(seed, "Решения", TuesdayMorning, catalog, map);
-        school.InstallPeople(roster, seed, "Slavic", pool);
+        school.InstallPeople(roster, seed, "Russia", pool);
         school.SetTimetable(new Timetable(
             [
                 new LessonPlacement(schoolClass.Id, "Mathematics", "t1", schoolClass.RoomId, Day: 1, Period: 1),

tests/HSchool.Simulation.Tests/LunchTests.cs

@@ -93,8 +93,8 @@ public class LunchTests
     private static School StaffedSchool()
     {
         var (catalog, map) = Vanilla();
-        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Slavic", Tuesday6);
+        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Russia", Tuesday6);
-        var pool = ApplicantPool.Create(catalog, roster, schoolSeed: 1, "Slavic", Tuesday6);
+        var pool = ApplicantPool.Create(catalog, roster, schoolSeed: 1, "Russia", Tuesday6);
 
         foreach (var subject in catalog.Subjects.Values.Where(def => !def.Abstract).Select(def => def.DefName))
         {
@@ -120,7 +120,7 @@ public class LunchTests
         }
 
         var school = School.Create(1, "Столовая", Tuesday6, catalog, map);
-        school.InstallPeople(roster, seed: 1, "Slavic", pool);
+        school.InstallPeople(roster, seed: 1, "Russia", pool);
         school.SetTimetable(SchoolTimetables.Build(catalog, map, roster, null, weekDays: 5));
         school.ConfigurePresence(weekDays: 5, maxDecisionsPerTick: 64);
         return school;

tests/HSchool.Simulation.Tests/PeopleInSchoolTests.cs

@@ -14,11 +14,11 @@ public class PeopleInSchoolTests
     {
         var (catalog, map) = Vanilla();
         var demand = SchoolDemand.From(catalog, map);
-        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Slavic", Start);
+        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Russia", Start);
-        var pool = ApplicantPool.Create(catalog, roster, schoolSeed: 1, "Slavic", Start);
+        var pool = ApplicantPool.Create(catalog, roster, schoolSeed: 1, "Russia", Start);
 
         using var school = School.Create(1, "Полная", Start, catalog, map);
-        school.InstallPeople(roster, seed: 1, "Slavic", pool);
+        school.InstallPeople(roster, seed: 1, "Russia", pool);
         school.Tick(1d / 20d, 5d);
 
         Assert.Same(roster, school.Roster);
@@ -39,11 +39,11 @@ public class PeopleInSchoolTests
     {
         var start = new DateTime(2012, 3, 31, 6, 0, 0, DateTimeKind.Utc);
         var (catalog, map) = Vanilla();
-        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Slavic", start);
+        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Russia", start);
-        var pool = ApplicantPool.Create(catalog, roster, schoolSeed: 1, "Slavic", start);
+        var pool = ApplicantPool.Create(catalog, roster, schoolSeed: 1, "Russia", start);
 
         using var school = School.Create(1, "Неделя", start, catalog, map);
-        school.InstallPeople(roster, seed: 1, "Slavic", pool);
+        school.InstallPeople(roster, seed: 1, "Russia", pool);
 
         var monday = new DateTime(2012, 4, 2, 6, 0, 0, DateTimeKind.Utc);
         var changed = school.Tick((monday - start).TotalMinutes / 5d, 5d);
@@ -60,7 +60,7 @@ public class PeopleInSchoolTests
     public void OffCampusNeeds_DoNotMoveOnTick()
     {
         var (catalog, map) = Vanilla();
-        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 2, "Slavic", Start);
+        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 2, "Russia", Start);
         using var school = School.Create(2, "Нужды", Start, catalog, map);
         school.InstallPeople(roster, seed: 2);
 
@@ -108,8 +108,8 @@ public class PeopleInSchoolTests
     public void SameSeed_InstallsTheSameNames()
     {
         var (catalog, map) = Vanilla();
-        var first = RosterGenerator.Generate(catalog, map, schoolSeed: 9, "Slavic", Start);
+        var first = RosterGenerator.Generate(catalog, map, schoolSeed: 9, "Russia", Start);
-        var second = RosterGenerator.Generate(catalog, map, schoolSeed: 9, "Slavic", Start);
+        var second = RosterGenerator.Generate(catalog, map, schoolSeed: 9, "Russia", Start);
 
         using var a = School.Create(9, "А", Start, catalog, map);
         using var b = School.Create(9, "Б", Start, catalog, map);
@@ -126,7 +126,7 @@ public class PeopleInSchoolTests
     {
         var catalog = Catalog();
         var map = Classrooms(4);
-        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Slavic", Start);
+        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Russia", Start);
         var demand = SchoolDemand.From(catalog, map);
         var oldest = roster.Classes.Max(schoolClass => schoolClass.Year);
         var graduated = roster.Classes
@@ -135,7 +135,7 @@ public class PeopleInSchoolTests
             .ToHashSet(StringComparer.Ordinal);
 
         using var school = School.Create(1, "Четыре кабинета", Start, catalog, map);
-        school.InstallPeople(roster, seed: 1, "Slavic");
+        school.InstallPeople(roster, seed: 1, "Russia");
 
         var sept = new DateTime(2012, 9, 1, 0, 0, 0, DateTimeKind.Utc);
         var changed = school.Tick((sept - Start).TotalMinutes / 5d, 5d);
@@ -160,9 +160,9 @@ public class PeopleInSchoolTests
         var start = new DateTime(2012, 9, 1, 6, 0, 0, DateTimeKind.Utc);
         var catalog = Catalog();
         var map = Classrooms(4);
-        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 3, "Slavic", start);
+        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 3, "Russia", start);
         using var school = School.Create(3, "Первое сентября", start, catalog, map);
-        school.InstallPeople(roster, seed: 3, "Slavic");
+        school.InstallPeople(roster, seed: 3, "Russia");
 
         var years = roster.Classes.Select(schoolClass => schoolClass.Year).OrderBy(year => year).ToArray();
         var changed = school.Tick(1d / 20d, 5d);

tests/HSchool.Simulation.Tests/PresenceTests.cs

@@ -30,15 +30,15 @@ public class PresenceTests
     public void ClassWithoutLessons_StaysAway_TeacherWithAnotherClassComes()
     {
         var (catalog, map) = Vanilla();
-        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Slavic", TuesdayMorning);
+        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Russia", TuesdayMorning);
-        var pool = ApplicantPool.Create(catalog, roster, schoolSeed: 1, "Slavic", TuesdayMorning);
+        var pool = ApplicantPool.Create(catalog, roster, schoolSeed: 1, "Russia", TuesdayMorning);
         var idle = roster.Classes[0];
         var busy = roster.Classes[1];
         var hired = Staffing.Hire(catalog, map, roster, pool, pool.Applicants[0].Person.Id, Staffing.TeacherPosition, Cap);
         Assert.Equal(StaffingError.None, hired.Error);
 
         using var school = School.Create(1, "Два класса", TuesdayMorning, catalog, map);
-        school.InstallPeople(hired.Roster, seed: 1, "Slavic", hired.Pool);
+        school.InstallPeople(hired.Roster, seed: 1, "Russia", hired.Pool);
         school.SetTimetable(new Timetable(
             [new LessonPlacement(busy.Id, "Mathematics", hired.Roster.People.First(person => person.IsStaff).Id, busy.RoomId, Day: 1, Period: 1)],
             []));
@@ -108,7 +108,7 @@ public class PresenceTests
         Assert.Contains(snapshot, row => row.NodeId is not null && (row.Path.Count > 0 || row.RemainingMinutes > 0));
 
         using var loaded = School.Load(2, "Сейв", live.Clock.Time, running: true, speedIndex: 0, catalog, map);
-        loaded.InstallPeople(live.Roster!, seed: 4, "Slavic", live.Applicants);
+        loaded.InstallPeople(live.Roster!, seed: 4, "Russia", live.Applicants);
         loaded.SetTimetable(live.Timetable!);
         loaded.ConfigurePresence(weekDays: 5, maxDecisionsPerTick: 10_000);
         loaded.RestorePresence(snapshot);
@@ -359,12 +359,12 @@ public class PresenceTests
 
     private static School OpenStaffed(DefCatalog catalog, MapLayout map, int seed)
     {
-        var roster = RosterGenerator.Generate(catalog, map, seed, "Slavic", TuesdayMorning);
+        var roster = RosterGenerator.Generate(catalog, map, seed, "Russia", TuesdayMorning);
-        var pool = ApplicantPool.Create(catalog, roster, seed, "Slavic", TuesdayMorning);
+        var pool = ApplicantPool.Create(catalog, roster, seed, "Russia", TuesdayMorning);
         var schoolClass = roster.Classes.First(row =>
             row.RoomId is "classroom-101" or "classroom-102" or "classroom-103" or "classroom-104");
         var school = School.Create(seed, "Присутствие", TuesdayMorning, catalog, map);
-        school.InstallPeople(roster, seed, "Slavic", pool);
+        school.InstallPeople(roster, seed, "Russia", pool);
         school.SetTimetable(new Timetable(
             [
                 new LessonPlacement(schoolClass.Id, "Mathematics", "t1", schoolClass.RoomId, Day: 1, Period: 1),
@@ -377,11 +377,11 @@ public class PresenceTests
 
     private static School Open(DefCatalog catalog, MapLayout map, DateTime start, int seed)
     {
-        var roster = RosterGenerator.Generate(catalog, map, seed, "Slavic", start);
+        var roster = RosterGenerator.Generate(catalog, map, seed, "Russia", start);
-        var pool = ApplicantPool.Create(catalog, roster, seed, "Slavic", start);
+        var pool = ApplicantPool.Create(catalog, roster, seed, "Russia", start);
         var schoolClass = roster.Classes[0];
         var school = School.Create(seed, "Присутствие", start, catalog, map);
-        school.InstallPeople(roster, seed, "Slavic", pool);
+        school.InstallPeople(roster, seed, "Russia", pool);
         school.SetTimetable(new Timetable(
             [new LessonPlacement(schoolClass.Id, "Mathematics", "t1", schoolClass.RoomId, Day: 0, Period: 1)],
             []));
@@ -392,10 +392,10 @@ public class PresenceTests
     private static School OpenEmpty(DateTime start)
     {
         var (catalog, map) = Vanilla();
-        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Slavic", start);
+        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Russia", start);
-        var pool = ApplicantPool.Create(catalog, roster, schoolSeed: 1, "Slavic", start);
+        var pool = ApplicantPool.Create(catalog, roster, schoolSeed: 1, "Russia", start);
         var school = School.Create(1, "Пустая", start, catalog, map);
-        school.InstallPeople(roster, seed: 1, "Slavic", pool);
+        school.InstallPeople(roster, seed: 1, "Russia", pool);
         school.ConfigurePresence(weekDays: 5, maxDecisionsPerTick: 10_000);
         return school;
     }