diff --git a/app/main/diceRoll/diceRollSessionStore.test.ts b/app/main/diceRoll/diceRollSessionStore.test.ts
index 187af2b..cc97de4 100644
--- a/app/main/diceRoll/diceRollSessionStore.test.ts
+++ b/app/main/diceRoll/diceRollSessionStore.test.ts
@@ -13,12 +13,37 @@ void test('diceRoll: roll produces values in range and notation', () => {
   store.dispatch({ kind: 'roll', count: 3, sides: 6 });
   const st = store.getState();
   assert.equal(st.active, true);
+  assert.equal(st.visibleToPlayers, true);
   assert.equal(st.notation, '3d6');
   assert.equal(st.values.length, 3);
   assert.ok(st.values.every((v) => v >= 1 && v <= 6));
   assert.equal(st.total, st.values.reduce((a, b) => a + b, 0));
 });
 
+void test('diceRoll: roll without visibleToPlayers keeps master result only', () => {
+  const store = new DiceRollSessionStore();
+  store.dispatch({ kind: 'setVisibleToPlayers', visible: false });
+  store.dispatch({ kind: 'roll', count: 2, sides: 8 });
+  const st = store.getState();
+  assert.equal(st.visibleToPlayers, false);
+  assert.equal(st.active, false);
+  assert.equal(st.notation, '2d8');
+  assert.equal(st.values.length, 2);
+  assert.ok(st.values.every((v) => v >= 1 && v <= 8));
+  assert.equal(st.startedAt, null);
+});
+
+void test('diceRoll: unchecking visibleToPlayers hides overlay', () => {
+  const store = new DiceRollSessionStore();
+  store.dispatch({ kind: 'roll', count: 1, sides: 20 });
+  assert.equal(store.getState().active, true);
+  const values = [...store.getState().values];
+  store.dispatch({ kind: 'setVisibleToPlayers', visible: false });
+  assert.equal(store.getState().active, false);
+  assert.equal(store.getState().visibleToPlayers, false);
+  assert.deepEqual(store.getState().values, values);
+});
+
 void test('diceRoll: d100 values are tens faces only', () => {
   const store = new DiceRollSessionStore();
   store.dispatch({ kind: 'roll', count: 5, sides: 100 });
@@ -30,12 +55,14 @@ void test('diceRoll: d100 values are tens faces only', () => {
   assert.equal(st.total, st.values.reduce((a, b) => a + b, 0));
 });
 
-void test('diceRoll: clear resets', () => {
+void test('diceRoll: clear resets but keeps visibleToPlayers', () => {
   const store = new DiceRollSessionStore();
+  store.dispatch({ kind: 'setVisibleToPlayers', visible: false });
   store.dispatch({ kind: 'roll', count: 1, sides: 20 });
   store.dispatch({ kind: 'clear' });
   assert.equal(store.getState().active, false);
   assert.deepEqual(store.getState().values, []);
+  assert.equal(store.getState().visibleToPlayers, false);
 });
 
 void test('diceRoll: hideOverlay keeps values for master UI', () => {
@@ -48,6 +75,16 @@ void test('diceRoll: hideOverlay keeps values for master UI', () => {
   assert.deepEqual(store.getState().values, values);
   assert.equal(store.getState().total, total);
   assert.equal(store.getState().notation, '2d6');
+  assert.equal(store.getState().visibleToPlayers, true);
+});
+
+void test('diceRoll: roll with zero count is no-op', () => {
+  const store = new DiceRollSessionStore();
+  store.dispatch({ kind: 'setVisibleToPlayers', visible: false });
+  const before = store.getState().revision;
+  store.dispatch({ kind: 'roll', count: 0, sides: 6 });
+  assert.equal(store.getState().revision, before);
+  assert.deepEqual(store.getState().values, []);
 });
 
 void test('formatPredeterminedDiceNotation', () => {
diff --git a/app/main/diceRoll/diceRollSessionStore.ts b/app/main/diceRoll/diceRollSessionStore.ts
index 17c5aa5..200fb2f 100644
--- a/app/main/diceRoll/diceRollSessionStore.ts
+++ b/app/main/diceRoll/diceRollSessionStore.ts
@@ -27,6 +27,19 @@ export class DiceRollSessionStore {
         this.state = {
           ...createInitialDiceRollState(),
           revision: this.state.revision + 1,
+          visibleToPlayers: this.state.visibleToPlayers,
+        };
+        return this.state;
+      }
+      case 'setVisibleToPlayers': {
+        if (this.state.visibleToPlayers === event.visible) return this.state;
+        this.state = {
+          ...this.state,
+          revision: this.state.revision + 1,
+          visibleToPlayers: event.visible,
+          ...(event.visible === false && this.state.active
+            ? { active: false, startedAt: null }
+            : {}),
         };
         return this.state;
       }
@@ -43,15 +56,18 @@ export class DiceRollSessionStore {
       case 'roll': {
         if (!isDiceSides(event.sides)) return this.state;
         const count = clampDiceCount(event.count);
+        if (count < 1) return this.state;
         const values = rollDiceValues(count, event.sides);
         const total = values.reduce((a, b) => a + b, 0);
+        const showToPlayers = this.state.visibleToPlayers;
         this.state = {
           revision: this.state.revision + 1,
-          active: true,
+          active: showToPlayers,
+          visibleToPlayers: showToPlayers,
           notation: formatDiceNotation(count, event.sides),
           values,
           total,
-          startedAt: Date.now(),
+          startedAt: showToPlayers ? Date.now() : null,
         };
         return this.state;
       }
diff --git a/app/main/gameSystems/gameSystemsStore.test.ts b/app/main/gameSystems/gameSystemsStore.test.ts
new file mode 100644
index 0000000..23841a5
--- /dev/null
+++ b/app/main/gameSystems/gameSystemsStore.test.ts
@@ -0,0 +1,38 @@
+import assert from 'node:assert/strict';
+import fs from 'node:fs/promises';
+import os from 'node:os';
+import path from 'node:path';
+import { test } from 'node:test';
+
+import { GameSystemsStore } from './gameSystemsStore';
+import type { SystemDefinition } from '../../shared/characterSheet/types';
+import { FORMAT_VERSION, SYSTEM_FORMAT } from '../../shared/characterSheet/types';
+
+function sampleSystem(): SystemDefinition {
+  return {
+    format: SYSTEM_FORMAT,
+    formatVersion: FORMAT_VERSION,
+    id: 'shadowdark',
+    name: 'Shadowdark',
+    schemaVersion: 1,
+    revision: 1,
+    bricks: { attributes: [{ key: 'str', label: 'STR', scale: 'numeric', default: 10 }] },
+    creationRules: [],
+    sheetLayout: { pageSize: 'fluid', grid: { size: 8 }, pages: [{ id: 'main', label: 'Main', widgets: [] }] },
+  };
+}
+
+test('GameSystemsStore import list delete', async () => {
+  const dir = await fs.mkdtemp(path.join(os.tmpdir(), 'gs-'));
+  const store = new GameSystemsStore(dir);
+  await store.importSystem(sampleSystem());
+  const list = await store.list();
+  assert.equal(list.length, 1);
+  assert.equal(list[0]!.id, 'shadowdark');
+  const bind = await store.bindSnapshot('shadowdark');
+  assert.ok(bind.snapshotHash.length === 64);
+  const snap = await store.getSnapshot(bind.snapshotHash);
+  assert.equal(snap?.id, 'shadowdark');
+  await store.delete('shadowdark');
+  assert.equal((await store.list()).length, 0);
+});
diff --git a/app/main/gameSystems/gameSystemsStore.ts b/app/main/gameSystems/gameSystemsStore.ts
new file mode 100644
index 0000000..e273137
--- /dev/null
+++ b/app/main/gameSystems/gameSystemsStore.ts
@@ -0,0 +1,129 @@
+import fs from 'node:fs/promises';
+import path from 'node:path';
+import { createHash } from 'node:crypto';
+
+import type { GameSystemListItem } from '../../shared/ipc/contracts';
+import type { SystemDefinition } from '../../shared/characterSheet/types';
+import { validateSystemDefinition } from '../../shared/characterSheet/systemValidate';
+import { snapshotHash } from '../../shared/characterSheet/snapshot';
+
+export type { GameSystemListItem };
+
+type Manifest = {
+  systems: GameSystemListItem[];
+};
+
+export class GameSystemsStore {
+  private readonly rootDir: string;
+  private readonly manifestPath: string;
+  private readonly snapshotsDir: string;
+  private manifest: Manifest = { systems: [] };
+  private loaded = false;
+
+  constructor(userData: string) {
+    this.rootDir = path.join(userData, 'game-systems');
+    this.manifestPath = path.join(this.rootDir, 'manifest.json');
+    this.snapshotsDir = path.join(this.rootDir, 'snapshots');
+  }
+
+  async ensureLoaded(): Promise<void> {
+    if (this.loaded) return;
+    await fs.mkdir(this.snapshotsDir, { recursive: true });
+    try {
+      const raw = await fs.readFile(this.manifestPath, 'utf8');
+      this.manifest = JSON.parse(raw) as Manifest;
+      if (!Array.isArray(this.manifest.systems)) this.manifest.systems = [];
+    } catch {
+      this.manifest = { systems: [] };
+    }
+    this.loaded = true;
+  }
+
+  async list(): Promise<GameSystemListItem[]> {
+    await this.ensureLoaded();
+    return [...this.manifest.systems];
+  }
+
+  private systemPath(id: string): string {
+    return path.join(this.rootDir, id, 'system.json');
+  }
+
+  async get(id: string): Promise<SystemDefinition | null> {
+    await this.ensureLoaded();
+    try {
+      const raw = await fs.readFile(this.systemPath(id), 'utf8');
+      return JSON.parse(raw) as SystemDefinition;
+    } catch {
+      return null;
+    }
+  }
+
+  async importSystem(system: SystemDefinition): Promise<GameSystemListItem> {
+    await this.ensureLoaded();
+    const check = validateSystemDefinition(system);
+    if (!check.ok) throw new Error(check.errors.map((e) => e.message).join('; '));
+
+    const dir = path.join(this.rootDir, system.id);
+    await fs.mkdir(dir, { recursive: true });
+    await fs.writeFile(this.systemPath(system.id), JSON.stringify(system, null, 2), 'utf8');
+
+    const hash = snapshotHash(system);
+    await fs.writeFile(path.join(this.snapshotsDir, `${hash}.json`), JSON.stringify(system), 'utf8');
+
+    const item: GameSystemListItem = {
+      id: system.id,
+      name: system.name,
+      edition: system.edition,
+      schemaVersion: system.schemaVersion,
+      revision: system.revision,
+    };
+    this.manifest.systems = this.manifest.systems.filter((s) => s.id !== system.id).concat(item);
+    await this.saveManifest();
+    return item;
+  }
+
+  async delete(id: string): Promise<string[]> {
+    await this.ensureLoaded();
+    this.manifest.systems = this.manifest.systems.filter((s) => s.id !== id);
+    await this.saveManifest();
+    try {
+      await fs.rm(path.join(this.rootDir, id), { recursive: true, force: true });
+    } catch {
+      // ignore
+    }
+    // Caller clears player bindings; return id for convenience
+    return [id];
+  }
+
+  async getSnapshot(hash: string): Promise<SystemDefinition | null> {
+    try {
+      const raw = await fs.readFile(path.join(this.snapshotsDir, `${hash}.json`), 'utf8');
+      return JSON.parse(raw) as SystemDefinition;
+    } catch {
+      return null;
+    }
+  }
+
+  async bindSnapshot(systemId: string): Promise<{ systemId: string; snapshotHash: string; system: SystemDefinition }> {
+    const system = await this.get(systemId);
+    if (!system) throw new Error(`System not found: ${systemId}`);
+    const hash = snapshotHash(system);
+    const snapPath = path.join(this.snapshotsDir, `${hash}.json`);
+    try {
+      await fs.access(snapPath);
+    } catch {
+      await fs.writeFile(snapPath, JSON.stringify(system), 'utf8');
+    }
+    return { systemId, snapshotHash: hash, system };
+  }
+
+  private async saveManifest(): Promise<void> {
+    await fs.mkdir(this.rootDir, { recursive: true });
+    await fs.writeFile(this.manifestPath, JSON.stringify(this.manifest, null, 2), 'utf8');
+  }
+}
+
+/** Test helper — content hash of arbitrary buffer. */
+export function sha256Hex(data: string): string {
+  return createHash('sha256').update(data).digest('hex');
+}
diff --git a/app/main/index.ts b/app/main/index.ts
index 175b712..4e44f9c 100644
--- a/app/main/index.ts
+++ b/app/main/index.ts
@@ -1,13 +1,14 @@
 import fs from 'node:fs/promises';
 import path from 'node:path';
 
-import { app, BrowserWindow, dialog, Menu, protocol } from 'electron';
+import { app, BrowserWindow, dialog, Menu, protocol, shell } from 'electron';
 
 import { installStdoutEpipeGuards } from './safeConsole';
 
 installStdoutEpipeGuards();
 
 import { openDialogFilterLabel } from '../shared/appBranding';
+import type { SystemDefinition } from '../shared/characterSheet/types';
 import { USERS_BRANCH_FEATURES_ENABLED } from '../shared/features/usersBranchFeatures';
 import { ipcChannels, type ScenePreviewImportEvent, type SessionState } from '../shared/ipc/contracts';
 import {
@@ -43,6 +44,7 @@ import { ZipProjectStore } from './project/zipStore';
 import { SceneViewStore } from './sceneView/sceneViewStore';
 import { registerDndAssetProtocol } from './protocol/dndAssetProtocol';
 import { PlayersStore } from './players/playersStore';
+import { GameSystemsStore } from './gameSystems/gameSystemsStore';
 import { PlaylistsStore } from './playlists/playlistsStore';
 import { SceneNpcTokensSessionStore } from './players/sceneNpcTokensSessionStore';
 import { ScenePlayerTokensSessionStore } from './players/scenePlayerTokensSessionStore';
@@ -91,6 +93,8 @@ import {
   closeTokenPathEditorWindow,
   closeNpcsWindow,
   sendToAppWindows,
+  setDiceWindowClosedListener,
+  setTimerWindowClosedListener,
   syncAllWindowChromeTitles,
   togglePresentationFullscreen,
   waitForEditorWindowReady,
@@ -199,6 +203,7 @@ const scenePlayerTokensSessionStore = new ScenePlayerTokensSessionStore();
 const tokenGridSnapSessionStore = new TokenGridSnapSessionStore();
 let tokensStore: TokensStore | null = null;
 let playersStore: PlayersStore | null = null;
+let gameSystemsStore: GameSystemsStore | null = null;
 let playlistsStore: PlaylistsStore | null = null;
 
 function emitTokenPathSessionState(): void {
@@ -293,6 +298,22 @@ function emitSessionTimerState(): void {
   }
 }
 
+function dismissSessionTimerWhenWindowCloses(): void {
+  const st = timerSessionStore.getState();
+  let changed = false;
+  if (st.running) {
+    timerSessionStore.dispatch({ kind: 'pause' });
+    changed = true;
+  }
+  if (st.visibleToPlayers) {
+    timerSessionStore.dispatch({ kind: 'setVisibleToPlayers', visible: false });
+    changed = true;
+  }
+  if (changed) emitSessionTimerState();
+}
+
+setTimerWindowClosedListener(dismissSessionTimerWhenWindowCloses);
+
 function emitInitiativeState(): void {
   const state = initiativeSessionStore.getState();
   for (const win of BrowserWindow.getAllWindows()) {
@@ -317,6 +338,15 @@ function emitDiceRollState(): void {
   }
 }
 
+function hideDiceOverlayWhenWindowCloses(): void {
+  const st = diceRollSessionStore.getState();
+  if (!st.visibleToPlayers || !st.active) return;
+  diceRollSessionStore.dispatch({ kind: 'hideOverlay' });
+  emitDiceRollState();
+}
+
+setDiceWindowClosedListener(hideDiceOverlayWhenWindowCloses);
+
 function syncInitiativePresenceFromSession(): void {
   const project = projectStore.getOpenProject();
   const sceneId = project?.currentSceneId ?? null;
@@ -633,6 +663,8 @@ async function main() {
     playersStore = new PlayersStore(app.getPath('userData'));
     await playersStore.ensureLoaded();
   }
+  gameSystemsStore = new GameSystemsStore(app.getPath('userData'));
+  await gameSystemsStore.ensureLoaded();
   playlistsStore = new PlaylistsStore(app.getPath('userData'));
   await playlistsStore.ensureLoaded();
   setLicenseAssert(() => {
@@ -650,6 +682,18 @@ async function main() {
     buildNumber: getOptionalBuildNumber(),
     packaged: app.isPackaged,
   }));
+  registerHandler(ipcChannels.app.openExternal, async ({ url }) => {
+    try {
+      const parsed = new URL(url);
+      if (parsed.protocol !== 'http:' && parsed.protocol !== 'https:') {
+        return { ok: false as const, error: 'Only http(s) URLs are allowed' };
+      }
+      await shell.openExternal(parsed.toString());
+      return { ok: true as const };
+    } catch (err) {
+      return { ok: false as const, error: err instanceof Error ? err.message : String(err) };
+    }
+  });
   registerHandler(ipcChannels.license.getStatus, () => licenseService.getStatus());
   registerHandler(ipcChannels.license.setToken, async ({ token }) => licenseService.setToken(token));
   registerHandler(ipcChannels.license.clearToken, () => licenseService.clearToken());
@@ -1945,6 +1989,50 @@ async function main() {
     return { url: playersStore.getImageUrl(id) };
   });
 
+  registerHandler(ipcChannels.gameSystems.list, async () => {
+    if (!gameSystemsStore) return { systems: [] };
+    return { systems: await gameSystemsStore.list() };
+  });
+  registerHandler(ipcChannels.gameSystems.importFromFile, async () => {
+    if (!gameSystemsStore) throw new Error('Game systems store unavailable');
+    const { canceled, filePaths } = await dialog.showOpenDialog({
+      properties: ['openFile'],
+      filters: [
+        {
+          name: app.getLocale().toLowerCase().startsWith('ru') ? 'Системы (JSON)' : 'Systems (JSON)',
+          extensions: ['json'],
+        },
+      ],
+    });
+    if (canceled || filePaths.length === 0) return { canceled: true as const };
+    const filePath = filePaths[0]!;
+    const raw = await fs.readFile(filePath, 'utf8');
+    const parsed = JSON.parse(raw) as SystemDefinition;
+    const system = await gameSystemsStore.importSystem(parsed);
+    return { canceled: false as const, system };
+  });
+  registerHandler(ipcChannels.gameSystems.delete, async ({ id }) => {
+    if (!gameSystemsStore) return { ok: true as const };
+    await gameSystemsStore.delete(id);
+    if (playersStore) {
+      const cleared = await playersStore.clearSystemBindings(id);
+      if (cleared > 0) emitPlayersState();
+    }
+    return { ok: true as const };
+  });
+  registerHandler(ipcChannels.gameSystems.get, async ({ id }) => {
+    if (!gameSystemsStore) return { system: null };
+    return { system: await gameSystemsStore.get(id) };
+  });
+  registerHandler(ipcChannels.gameSystems.bindSnapshot, async ({ systemId }) => {
+    if (!gameSystemsStore) throw new Error('Game systems store unavailable');
+    return gameSystemsStore.bindSnapshot(systemId);
+  });
+  registerHandler(ipcChannels.gameSystems.getSnapshot, async ({ hash }) => {
+    if (!gameSystemsStore) return { system: null };
+    return { system: await gameSystemsStore.getSnapshot(hash) };
+  });
+
   registerHandler(ipcChannels.playlists.getState, async () => {
     if (!playlistsStore) return { playlists: [], audios: [] };
     await playlistsStore.ensureLoaded();
diff --git a/app/main/players/playersStore.ts b/app/main/players/playersStore.ts
index 819a8f7..298e065 100644
--- a/app/main/players/playersStore.ts
+++ b/app/main/players/playersStore.ts
@@ -188,6 +188,8 @@ export class PlayersStore {
         input.imageScale ?? existing?.imageScale ?? DEFAULT_PLAYER_IMAGE_SCALE,
       ),
     };
+    if (existing?.systemId !== undefined) player.systemId = existing.systemId;
+    if (existing?.characterSheet !== undefined) player.characterSheet = existing.characterSheet;
 
     if (existing) {
       this.players = this.players.map((p) => (p.id === player.id ? player : p));
@@ -287,6 +289,20 @@ export class PlayersStore {
     return this.getById(playerId);
   }
 
+  /** Clears systemId / characterSheet on players bound to a removed game system. */
+  async clearSystemBindings(systemId: string): Promise<number> {
+    await this.ensureLoaded();
+    let changed = 0;
+    this.players = this.players.map((p) => {
+      const hit = p.systemId === systemId || p.characterSheet?.systemId === systemId;
+      if (!hit) return p;
+      changed += 1;
+      return { ...p, systemId: null, characterSheet: null };
+    });
+    if (changed > 0) await this.persist();
+    return changed;
+  }
+
   private async persist(): Promise<void> {
     await fs.mkdir(this.rootDir, { recursive: true });
     const payload: PlayersManifest = { players: this.players, teams: this.teams };
diff --git a/app/main/sessionTimer/timerSessionStore.test.ts b/app/main/sessionTimer/timerSessionStore.test.ts
index ead977c..2395278 100644
--- a/app/main/sessionTimer/timerSessionStore.test.ts
+++ b/app/main/sessionTimer/timerSessionStore.test.ts
@@ -81,3 +81,16 @@ void test('clear restores defaults', () => {
   assert.equal(store.getState().visibleToPlayers, false);
   assert.equal(store.getState().running, false);
 });
+
+void test('dismiss on window close: pause + hide from players', () => {
+  const store = new TimerSessionStore();
+  const t0 = 1_000_000;
+  store.dispatch({ kind: 'setDuration', durationMs: 60_000 }, t0);
+  store.dispatch({ kind: 'setVisibleToPlayers', visible: true });
+  store.dispatch({ kind: 'start' }, t0);
+  store.dispatch({ kind: 'pause' }, t0 + 5_000);
+  store.dispatch({ kind: 'setVisibleToPlayers', visible: false });
+  assert.equal(store.getState().running, false);
+  assert.equal(store.getState().visibleToPlayers, false);
+  assert.equal(store.getState().remainingMs, 55_000);
+});
diff --git a/app/main/windows/createWindows.ts b/app/main/windows/createWindows.ts
index 9791e05..d6959e0 100644
--- a/app/main/windows/createWindows.ts
+++ b/app/main/windows/createWindows.ts
@@ -1,6 +1,6 @@
 import path from 'node:path';
 
-import { app, BrowserWindow, screen } from 'electron';
+import { app, BrowserWindow, screen, shell } from 'electron';
 
 import type { PresentationSettings } from '../../shared/types/presentationSettings';
 import { readPresentationSettings } from '../preferences/appPreferences';
@@ -66,13 +66,27 @@ const PLAYLISTS_WINDOW_HEIGHT = 800;
 const TIMER_WINDOW_WIDTH = 360;
 const TIMER_WINDOW_HEIGHT = 420;
 
+/** Колбэк при закрытии окна таймера (Esc / крестик / programmatic). */
+let timerWindowClosedListener: (() => void) | null = null;
+
+export function setTimerWindowClosedListener(listener: (() => void) | null): void {
+  timerWindowClosedListener = listener;
+}
+
 /** Окно трекера инициативы. */
 const INITIATIVE_WINDOW_WIDTH = 920;
 const INITIATIVE_WINDOW_HEIGHT = 420;
 
 /** Компактное окно броска кубиков. */
 const DICE_WINDOW_WIDTH = 380;
-const DICE_WINDOW_HEIGHT = 420;
+const DICE_WINDOW_HEIGHT = 460;
+
+/** Колбэк при закрытии окна кубиков (Esc / крестик / programmatic). */
+let diceWindowClosedListener: (() => void) | null = null;
+
+export function setDiceWindowClosedListener(listener: (() => void) | null): void {
+  diceWindowClosedListener = listener;
+}
 
 /** Редактор НПС — как основной редактор, шире инспектор. */
 const NPCS_EDITOR_WINDOW_WIDTH = 1400;
@@ -452,6 +466,17 @@ function createWindow(kind: WindowKind, opts?: CreateWindowOpts): BrowserWindow
   win.webContents.on('preload-error', (_event, preloadPath, error) => {
     safeConsoleError(`[preload-error] ${preloadPath}:`, error);
   });
+  win.webContents.setWindowOpenHandler(({ url }) => {
+    try {
+      const parsed = new URL(url);
+      if (parsed.protocol === 'http:' || parsed.protocol === 'https:') {
+        void shell.openExternal(parsed.toString());
+      }
+    } catch {
+      /* ignore invalid urls */
+    }
+    return { action: 'deny' };
+  });
   win.webContents.on('did-fail-load', (_event, errorCode, errorDescription, validatedURL, isMainFrame) => {
     // -3 ERR_ABORTED: частый артефакт при navigate/maximize/закрытии — не шумим.
     if (errorCode === -3) return;
@@ -491,6 +516,16 @@ function createWindow(kind: WindowKind, opts?: CreateWindowOpts): BrowserWindow
     });
   }
   win.on('closed', () => windows.delete(kind));
+  if (kind === 'timer') {
+    win.on('closed', () => {
+      timerWindowClosedListener?.();
+    });
+  }
+  if (kind === 'dice') {
+    win.on('closed', () => {
+      diceWindowClosedListener?.();
+    });
+  }
   if (kind === 'sceneEditor') {
     win.on('closed', () => {
       closeTokenPathEditorWindow();
diff --git a/app/renderer/control/ControlApp.tsx b/app/renderer/control/ControlApp.tsx
index 116e60b..ec9be4b 100644
--- a/app/renderer/control/ControlApp.tsx
+++ b/app/renderer/control/ControlApp.tsx
@@ -1224,7 +1224,7 @@ export function ControlApp() {
     const cw = cr ? cr.w : ps.w;
     const ch = cr ? cr.h : ps.h;
     const minDim = Math.min(cw, ch);
-    const size = Math.max(2, t.radiusN * minDim * 2);
+    const size = Math.max(1, t.radiusN * minDim * 2);
     el.style.left = `${String(ox + p.x * cw)}px`;
     el.style.top = `${String(oy + p.y * ch)}px`;
     el.style.width = `${String(size)}px`;
@@ -2110,19 +2110,22 @@ export function ControlApp() {
                 <div className={styles.radiusLabel}>{t('control.brushRadius')}</div>
                 <input
                   type="range"
-                  min={0.015}
-                  max={0.18}
-                  step={0.001}
-                  value={tool.radiusN}
+                  min={1}
+                  max={36}
+                  step={1}
+                  value={Math.max(1, Math.min(36, Math.round(tool.radiusN / 0.005)))}
                   onChange={(e) => {
-                    const v = Number((e.currentTarget as HTMLInputElement).value);
-                    const next = Math.max(0.01, Math.min(0.25, Number.isFinite(v) ? v : tool.radiusN));
+                    const ui = Number((e.currentTarget as HTMLInputElement).value);
+                    const uiClamped = Math.max(1, Math.min(36, Number.isFinite(ui) ? Math.round(ui) : 1));
+                    const next = uiClamped * 0.005;
                     void fx.dispatch({ kind: 'tool.set', tool: { ...tool, radiusN: next } });
                   }}
                   className={styles.range}
                   aria-label={t('control.brushRadius')}
                 />
-                <div className={styles.radiusValue}>{Math.round(tool.radiusN * 100)}</div>
+                <div className={styles.radiusValue}>
+                  {Math.max(1, Math.min(36, Math.round(tool.radiusN / 0.005)))}
+                </div>
               </div>
               {tool.tool === 'exploreBrush' || tool.tool === 'closeBrush' ? (
                 <div className={styles.brushShapeRow}>
diff --git a/app/renderer/dice/DiceApp.module.css b/app/renderer/dice/DiceApp.module.css
index 6e2d257..84eac94 100644
--- a/app/renderer/dice/DiceApp.module.css
+++ b/app/renderer/dice/DiceApp.module.css
@@ -49,6 +49,14 @@
   border-radius: var(--radius-sm);
   padding: 8px;
   background: var(--color-overlay-dark-3, rgba(0, 0, 0, 0.28));
+  color: inherit;
+  width: 100%;
+  box-sizing: border-box;
+  outline: none;
+}
+
+.countValue:focus {
+  border-color: rgba(147, 197, 253, 0.75);
 }
 
 .actions {
@@ -58,6 +66,15 @@
   margin-top: 4px;
 }
 
+.checkRow {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  font-size: var(--text-sm);
+  font-weight: 600;
+  user-select: none;
+}
+
 .actions > * {
   width: 100%;
   max-width: none;
diff --git a/app/renderer/dice/DiceApp.tsx b/app/renderer/dice/DiceApp.tsx
index 444619d..2859fa1 100644
--- a/app/renderer/dice/DiceApp.tsx
+++ b/app/renderer/dice/DiceApp.tsx
@@ -1,7 +1,13 @@
 import React, { useEffect, useState } from 'react';
 
 import { ipcChannels } from '../../shared/ipc/contracts';
-import { DICE_SIDES, type DiceSides } from '../../shared/types/diceRoll';
+import {
+  DICE_COUNT_MAX,
+  DICE_COUNT_MIN,
+  DICE_SIDES,
+  clampDiceCount,
+  type DiceSides,
+} from '../../shared/types/diceRoll';
 import { useEditorI18n } from '../editor/i18n/EditorI18nContext';
 import { getDndApi } from '../shared/dndApi';
 import { useDiceRollState } from '../shared/dice/useDiceRollState';
@@ -15,6 +21,7 @@ export function DiceApp() {
   const [state, diceApi] = useDiceRollState();
   const [sides, setSides] = useState<DiceSides>(20);
   const [count, setCount] = useState(1);
+  const [countDraft, setCountDraft] = useState('1');
 
   useEffect(() => {
     const onKey = (e: KeyboardEvent) => {
@@ -26,6 +33,32 @@ export function DiceApp() {
     return () => window.removeEventListener('keydown', onKey);
   }, [api]);
 
+  const commitCountDraft = () => {
+    const trimmed = countDraft.trim();
+    if (trimmed === '') {
+      setCount(DICE_COUNT_MIN);
+      setCountDraft(String(DICE_COUNT_MIN));
+      return;
+    }
+    const parsed = Number(trimmed);
+    if (!Number.isFinite(parsed) || parsed < DICE_COUNT_MIN) {
+      setCount(DICE_COUNT_MIN);
+      setCountDraft(String(DICE_COUNT_MIN));
+      return;
+    }
+    const next = clampDiceCount(parsed);
+    setCount(next);
+    setCountDraft(String(next));
+  };
+
+  const setCountClamped = (n: number) => {
+    const next = clampDiceCount(n);
+    setCount(next);
+    setCountDraft(String(next));
+  };
+
+  const showToPlayers = state?.visibleToPlayers ?? true;
+
   return (
     <div className={styles.page} data-testid="dice-app">
       <div className={styles.sectionLabel}>{t('dice.sides')}</div>
@@ -46,27 +79,80 @@ export function DiceApp() {
       <div className={styles.countRow}>
         <Button
           variant="ghost"
-          onClick={() => setCount((c) => Math.max(1, c - 1))}
+          onClick={() => setCountClamped(count - 1)}
           ariaLabel={t('dice.dec')}
+          disabled={count <= DICE_COUNT_MIN}
         >
           −
         </Button>
-        <div className={styles.countValue} data-testid="dice-count">
-          {count}
-        </div>
+        <input
+          className={styles.countValue}
+          type="text"
+          inputMode="numeric"
+          value={countDraft}
+          onChange={(e) => {
+            const digits = e.target.value.replace(/\D/g, '');
+            if (digits === '') {
+              setCountDraft('');
+              return;
+            }
+            const n = Number(digits);
+            if (!Number.isFinite(n)) {
+              setCountDraft(String(DICE_COUNT_MIN));
+              setCount(DICE_COUNT_MIN);
+              return;
+            }
+            if (n > DICE_COUNT_MAX) {
+              setCountDraft(String(DICE_COUNT_MAX));
+              setCount(DICE_COUNT_MAX);
+              return;
+            }
+            setCountDraft(digits);
+          }}
+          onBlur={() => commitCountDraft()}
+          onKeyDown={(e) => {
+            if (e.key === 'Enter') {
+              e.preventDefault();
+              commitCountDraft();
+              (e.currentTarget as HTMLInputElement).blur();
+            }
+          }}
+          aria-label={t('dice.count')}
+          data-testid="dice-count"
+        />
         <Button
           variant="ghost"
-          onClick={() => setCount((c) => Math.min(20, c + 1))}
+          onClick={() => setCountClamped(count + 1)}
           ariaLabel={t('dice.inc')}
+          disabled={count >= DICE_COUNT_MAX}
         >
           +
         </Button>
       </div>
 
+      <label className={styles.checkRow}>
+        <input
+          type="checkbox"
+          checked={showToPlayers}
+          onChange={(e) =>
+            void diceApi.dispatch({ kind: 'setVisibleToPlayers', visible: e.target.checked })
+          }
+          data-testid="dice-show-to-players"
+        />
+        <span>{t('dice.showAnimationToPlayers')}</span>
+      </label>
+
       <div className={styles.actions}>
         <Button
           variant="primary"
-          onClick={() => void diceApi.dispatch({ kind: 'roll', count, sides })}
+          disabled={clampDiceCount(Number(countDraft.trim()) || count) < 1}
+          onClick={() => {
+            const next = clampDiceCount(Number(countDraft.trim()));
+            setCount(next);
+            setCountDraft(String(next));
+            if (next < 1) return;
+            void diceApi.dispatch({ kind: 'roll', count: next, sides });
+          }}
           data-testid="dice-roll"
         >
           {t('dice.roll')}
diff --git a/app/renderer/editor/EditorApp.module.css b/app/renderer/editor/EditorApp.module.css
index 7096a49..3ced0fe 100644
--- a/app/renderer/editor/EditorApp.module.css
+++ b/app/renderer/editor/EditorApp.module.css
@@ -688,6 +688,13 @@
   margin-top: 4px;
 }
 
+.aboutSponsorsList {
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+  line-height: 1.45;
+}
+
 .aboutLink {
   color: var(--color-accent, #a78bfa);
   text-decoration: none;
diff --git a/app/renderer/editor/EditorApp.tsx b/app/renderer/editor/EditorApp.tsx
index 11f776f..2c5c1b0 100644
--- a/app/renderer/editor/EditorApp.tsx
+++ b/app/renderer/editor/EditorApp.tsx
@@ -62,6 +62,7 @@ import { MaterialEditModal, MaterialsManagerModal } from './MaterialsModals';
 import { PlayersManagerModal } from './PlayersModals';
 import { LaunchPlayersModal } from './LaunchPlayersModal';
 import { PresentationSettingsModal } from './PresentationSettingsModal';
+import { GameSystemsModal } from './GameSystemsModal';
 import { PlaylistsManagerModal } from './PlaylistsModal';
 import { isSceneDescriptionEmpty, sanitizeSceneDescriptionHtml } from './sceneDescriptionHtml';
 import { SceneDescriptionModal } from './SceneDescriptionModal';
@@ -166,10 +167,28 @@ export function EditorApp() {
   const [launchPlayersOpen, setLaunchPlayersOpen] = useState(false);
   const [playlistsManagerOpen, setPlaylistsManagerOpen] = useState(false);
   const [presentationSettingsOpen, setPresentationSettingsOpen] = useState(false);
+  const [gameSystemsOpen, setGameSystemsOpen] = useState(false);
   const [runMenuOpen, setRunMenuOpen] = useState(false);
   const [runMenuPos, setRunMenuPos] = useState<{ left: number; top: number } | null>(null);
   const runSplitRef = useRef<HTMLDivElement | null>(null);
   const [materialEdit, setMaterialEdit] = useState<ProjectMaterial | null | 'new'>(null);
+
+  const listGameSystems = useCallback(async () => {
+    const res = await getDndApi().invoke(ipcChannels.gameSystems.list, {});
+    return res.systems;
+  }, []);
+  const importGameSystem = useCallback(async () => {
+    const res = await getDndApi().invoke(ipcChannels.gameSystems.importFromFile, {});
+    return res.canceled ? null : res.system;
+  }, []);
+  const deleteGameSystem = useCallback(async (id: string) => {
+    await getDndApi().invoke(ipcChannels.gameSystems.delete, { id });
+  }, []);
+  const previewGameSystem = useCallback(async (id: string) => {
+    console.log('[gameSystems] preview stub', id);
+    window.alert(`Preview (stub): ${id}`);
+  }, []);
+
   const onProjectNotice = useCallback(
     (code: ProjectNoticeCode) => {
       const handlers: Record<ProjectNoticeCode, () => void> = {
@@ -1360,6 +1379,18 @@ export function EditorApp() {
               >
                 {t('menu.presentationSettings')}
               </button>
+              <button
+                type="button"
+                role="menuitem"
+                className={styles.fileMenuItem}
+                onClick={() => {
+                  setSettingsMenuOpen(false);
+                  setSettingsLangSubOpen(false);
+                  setGameSystemsOpen(true);
+                }}
+              >
+                {t('menu.gameSystems')}
+              </button>
               <div className={styles.fileMenuSubHost} role="presentation">
                 <button
                   type="button"
@@ -1682,6 +1713,22 @@ export function EditorApp() {
         open={presentationSettingsOpen}
         onClose={() => setPresentationSettingsOpen(false)}
       />
+      <GameSystemsModal
+        open={gameSystemsOpen}
+        onClose={() => setGameSystemsOpen(false)}
+        labels={{
+          title: t('gameSystems.title'),
+          import: t('gameSystems.import'),
+          preview: t('gameSystems.preview'),
+          remove: t('gameSystems.remove'),
+          empty: t('gameSystems.empty'),
+          close: t('gameSystems.close'),
+        }}
+        listSystems={listGameSystems}
+        importSystem={importGameSystem}
+        deleteSystem={deleteGameSystem}
+        previewSystem={previewGameSystem}
+      />
       <PlaylistsManagerModal
         open={playlistsManagerOpen}
         onClose={() => setPlaylistsManagerOpen(false)}
diff --git a/app/renderer/editor/GameSystemsModal.tsx b/app/renderer/editor/GameSystemsModal.tsx
new file mode 100644
index 0000000..41ea7a8
--- /dev/null
+++ b/app/renderer/editor/GameSystemsModal.tsx
@@ -0,0 +1,134 @@
+import { useEffect, useState } from 'react';
+
+import type { GameSystemListItem } from '../../shared/ipc/contracts';
+
+export type { GameSystemListItem };
+
+type Props = {
+  open: boolean;
+  onClose: () => void;
+  labels: {
+    title: string;
+    import: string;
+    preview: string;
+    remove: string;
+    empty: string;
+    close: string;
+  };
+  listSystems: () => Promise<GameSystemListItem[]>;
+  importSystem: () => Promise<GameSystemListItem | null>;
+  deleteSystem: (id: string) => Promise<void>;
+  previewSystem: (id: string) => Promise<void>;
+};
+
+export function GameSystemsModal({
+  open,
+  onClose,
+  labels,
+  listSystems,
+  importSystem,
+  deleteSystem,
+  previewSystem,
+}: Props) {
+  const [items, setItems] = useState<GameSystemListItem[]>([]);
+  const [busy, setBusy] = useState(false);
+
+  useEffect(() => {
+    if (!open) return;
+    void (async () => {
+      setItems(await listSystems());
+    })();
+  }, [open, listSystems]);
+
+  if (!open) return null;
+
+  return (
+    <div
+      data-testid="game-systems-modal"
+      style={{
+        position: 'fixed',
+        inset: 0,
+        background: 'rgba(0,0,0,0.55)',
+        display: 'grid',
+        placeItems: 'center',
+        zIndex: 10000,
+      }}
+    >
+      <div
+        style={{
+          width: 560,
+          maxHeight: '80vh',
+          overflow: 'auto',
+          background: 'rgba(10,10,14,0.98)',
+          border: '1px solid rgba(255,255,255,0.12)',
+          borderRadius: 12,
+          padding: 16,
+          color: 'rgba(255,255,255,0.92)',
+        }}
+      >
+        <div style={{ display: 'flex', justifyContent: 'space-between', marginBottom: 12 }}>
+          <strong>{labels.title}</strong>
+          <button type="button" data-testid="game-systems-close" onClick={onClose}>
+            {labels.close}
+          </button>
+        </div>
+        <div style={{ display: 'flex', gap: 8, marginBottom: 12 }}>
+          <button
+            type="button"
+            data-testid="game-systems-import"
+            disabled={busy}
+            onClick={async () => {
+              setBusy(true);
+              try {
+                await importSystem();
+                setItems(await listSystems());
+              } finally {
+                setBusy(false);
+              }
+            }}
+          >
+            {labels.import}
+          </button>
+        </div>
+        {items.length === 0 ? (
+          <div style={{ opacity: 0.6 }}>{labels.empty}</div>
+        ) : (
+          items.map((s) => (
+            <div
+              key={s.id}
+              data-testid={`game-system-${s.id}`}
+              style={{
+                display: 'flex',
+                justifyContent: 'space-between',
+                gap: 8,
+                padding: '10px 0',
+                borderBottom: '1px solid rgba(255,255,255,0.08)',
+              }}
+            >
+              <div>
+                <div>{s.name}</div>
+                <div style={{ opacity: 0.55, fontSize: 12 }}>
+                  {s.id} · r{s.revision}
+                </div>
+              </div>
+              <div style={{ display: 'flex', gap: 8 }}>
+                <button type="button" onClick={() => void previewSystem(s.id)}>
+                  {labels.preview}
+                </button>
+                <button
+                  type="button"
+                  onClick={async () => {
+                    await deleteSystem(s.id);
+                    setItems(await listSystems());
+                  }}
+                >
+                  {labels.remove}
+                </button>
+              </div>
+            </div>
+          ))
+        )}
+      </div>
+    </div>
+  );
+}
diff --git a/app/renderer/editor/about/EditorAboutModals.tsx b/app/renderer/editor/about/EditorAboutModals.tsx
index fca2ec7..648d215 100644
--- a/app/renderer/editor/about/EditorAboutModals.tsx
+++ b/app/renderer/editor/about/EditorAboutModals.tsx
@@ -13,6 +13,15 @@ import {
 } from '../help/helpSections';
 import { useEditorI18n } from '../i18n/EditorI18nContext';
 
+const ABOUT_SPONSORS = [
+  { kind: 'text', name: 'Исаков Артур' },
+  { kind: 'text', name: 'Подчуфарова Евгения' },
+  { kind: 'text', name: 'Никитин Виктор' },
+  { kind: 'text', name: 'Майер С.В. (Клуб «Серый Май»)' },
+  { kind: 'link', name: 'true_rus(КАВ)', url: 'https://truecorp.su/' },
+  { kind: 'text', name: 'Макс LonelyFlame Чурсин' },
+] as const;
+
 type AppAboutModalProps = {
   open: boolean;
   onClose: () => void;
@@ -80,6 +89,24 @@ export function AppAboutModal({ open, onClose, appVersion }: AppAboutModalProps)
                 {t('app.about.websiteUrl')}
               </a>
             </div>
+            <div className={styles.fieldLabel}>{t('app.about.sponsorsLabel')}</div>
+            <div className={styles.aboutSponsorsList}>
+              {ABOUT_SPONSORS.map((sponsor) =>
+                sponsor.kind === 'link' ? (
+                  <a
+                    key={sponsor.name}
+                    className={styles.aboutLink}
+                    href={sponsor.url}
+                    target="_blank"
+                    rel="noreferrer"
+                  >
+                    {sponsor.name}
+                  </a>
+                ) : (
+                  <div key={sponsor.name}>{sponsor.name}</div>
+                ),
+              )}
+            </div>
           </div>
         </div>
         <div className={styles.modalFooter}>
diff --git a/app/renderer/editor/i18n/editorMessages.ts b/app/renderer/editor/i18n/editorMessages.ts
index 37c2618..bfe1655 100644
--- a/app/renderer/editor/i18n/editorMessages.ts
+++ b/app/renderer/editor/i18n/editorMessages.ts
@@ -132,12 +132,20 @@ export const EDITOR_MESSAGES: Record<EditorLocale, Record<string, string>> = {
     'menu.aboutLicense': 'О лицензии',
     'menu.checkUpdates': 'Проверить обновления',
     'menu.presentationSettings': 'Экран презентации',
+    'menu.gameSystems': 'Игровые системы',
     'menu.language': 'Язык',
     'menu.langRu': 'Русский',
     'menu.langEn': 'English',
     'menu.aboutProgram': 'О программе',
     'menu.instructions': 'Инструкция',
 
+    'gameSystems.title': 'Игровые системы',
+    'gameSystems.import': 'Импорт…',
+    'gameSystems.preview': 'Просмотр',
+    'gameSystems.remove': 'Удалить',
+    'gameSystems.empty': 'Нет импортированных систем',
+    'gameSystems.close': 'Закрыть',
+
     'top.aboutApp': 'О приложении',
 
     'app.about.title': 'О программе',
@@ -152,6 +160,7 @@ export const EDITOR_MESSAGES: Record<EditorLocale, Record<string, string>> = {
     'app.about.supportEmail': 'player.ttrpg@gmail.com',
     'app.about.websiteLabel': 'САЙТ И ОБНОВЛЕНИЯ',
     'app.about.websiteUrl': 'https://ttrpgplayer.ru/',
+    'app.about.sponsorsLabel': 'СПОНСОРЫ',
 
     'help.title': 'Инструкция',
     'help.navAria': 'Разделы инструкции',
@@ -676,6 +685,7 @@ export const EDITOR_MESSAGES: Record<EditorLocale, Record<string, string>> = {
     'dice.noResult': 'Пока нет броска',
     'dice.inc': 'Больше',
     'dice.dec': 'Меньше',
+    'dice.showAnimationToPlayers': 'Показать анимацию игрокам',
 
     'sessionTimer.duration': 'Длительность (MM:SS)',
     'sessionTimer.start': 'Старт',
@@ -877,12 +887,20 @@ export const EDITOR_MESSAGES: Record<EditorLocale, Record<string, string>> = {
     'menu.aboutLicense': 'About license',
     'menu.checkUpdates': 'Check for updates',
     'menu.presentationSettings': 'Presentation display',
+    'menu.gameSystems': 'Game systems',
     'menu.language': 'Language',
     'menu.langRu': 'Русский',
     'menu.langEn': 'English',
     'menu.aboutProgram': 'About',
     'menu.instructions': 'Instructions',
 
+    'gameSystems.title': 'Game systems',
+    'gameSystems.import': 'Import…',
+    'gameSystems.preview': 'Preview',
+    'gameSystems.remove': 'Remove',
+    'gameSystems.empty': 'No imported systems',
+    'gameSystems.close': 'Close',
+
     'top.aboutApp': 'About',
 
     'app.about.title': 'About',
@@ -897,6 +915,7 @@ export const EDITOR_MESSAGES: Record<EditorLocale, Record<string, string>> = {
     'app.about.supportEmail': 'player.ttrpg@gmail.com',
     'app.about.websiteLabel': 'WEBSITE & UPDATES',
     'app.about.websiteUrl': 'https://ttrpgplayer.ru/',
+    'app.about.sponsorsLabel': 'SPONSORS',
 
     'help.title': 'Instructions',
     'help.navAria': 'Instruction sections',
@@ -1423,6 +1442,7 @@ export const EDITOR_MESSAGES: Record<EditorLocale, Record<string, string>> = {
     'dice.noResult': 'No roll yet',
     'dice.inc': 'More',
     'dice.dec': 'Fewer',
+    'dice.showAnimationToPlayers': 'Show animation to players',
 
     'sessionTimer.duration': 'Duration (MM:SS)',
     'sessionTimer.start': 'Start',
diff --git a/app/shared/characterSheet/core.test.ts b/app/shared/characterSheet/core.test.ts
new file mode 100644
index 0000000..b21386b
--- /dev/null
+++ b/app/shared/characterSheet/core.test.ts
@@ -0,0 +1,171 @@
+import assert from 'node:assert/strict';
+import { test } from 'node:test';
+
+import { evaluateFormula, buildFormulaContext } from './formula';
+import { computeDerived, sortDerived, CycleError } from './derived';
+import { validatePointBuy, validateArray, rollDice, sum, validateCreationRules } from './creation';
+import { snapshotHash, canonicalJson } from './snapshot';
+import { validateSystemDefinition } from './systemValidate';
+import type { SystemDefinition } from './types';
+import { FORMAT_VERSION, SYSTEM_FORMAT } from './types';
+
+test('evaluateFormula: D&D ability modifier', () => {
+  const ctx = { 'attr.str': 16 };
+  assert.equal(evaluateFormula('floor((attr.str - 10) / 2)', ctx), 3);
+  assert.equal(evaluateFormula('(attr.str - 10) / 2', ctx, 'floor'), 3);
+});
+
+test('evaluateFormula: clamp min max', () => {
+  assert.equal(evaluateFormula('clamp(attr.str, 1, 20)', { 'attr.str': 25 }), 20);
+});
+
+test('computeDerived topo order', () => {
+  const derived = computeDerived(
+    [
+      {
+        key: 'strMod',
+        label: 'STR mod',
+        formula: 'floor((attr.str - 10) / 2)',
+        dependsOn: ['attr.str'],
+        round: 'none',
+      },
+      {
+        key: 'carry',
+        label: 'Carry',
+        formula: 'attr.str * 15',
+        dependsOn: ['attr.str'],
+      },
+    ],
+    { attributes: { str: 12 } },
+  );
+  assert.equal(derived.strMod, 1);
+  assert.equal(derived.carry, 180);
+});
+
+test('sortDerived detects cycles', () => {
+  assert.throws(
+    () =>
+      sortDerived([
+        { key: 'a', label: 'a', formula: 'derived.b', dependsOn: ['derived.b'] },
+        { key: 'b', label: 'b', formula: 'derived.a', dependsOn: ['derived.a'] },
+      ]),
+    CycleError,
+  );
+});
+
+test('point buy budget', () => {
+  const rule = {
+    id: 'pb',
+    type: 'point_buy' as const,
+    appliesTo: 'attribute' as const,
+    params: {
+      budget: 27,
+      keys: ['str', 'dex', 'con', 'int', 'wis', 'cha'],
+    },
+  };
+  const ok = validatePointBuy(rule, { str: 15, dex: 14, con: 13, int: 12, wis: 10, cha: 8 });
+  assert.equal(ok.length, 0);
+  const bad = validatePointBuy(rule, { str: 15, dex: 15, con: 15, int: 15, wis: 15, cha: 15 });
+  assert.ok(bad.some((e) => e.code === 'point_buy_budget'));
+});
+
+test('array permutation', () => {
+  const rule = {
+    id: 'arr',
+    type: 'array' as const,
+    appliesTo: 'attribute' as const,
+    params: { array: [15, 14, 13, 12, 10, 8], keys: ['str', 'dex', 'con', 'int', 'wis', 'cha'] },
+  };
+  assert.equal(
+    validateArray(rule, { str: 15, dex: 14, con: 13, int: 12, wis: 10, cha: 8 }).length,
+    0,
+  );
+  assert.ok(validateArray(rule, { str: 15, dex: 15, con: 13, int: 12, wis: 10, cha: 8 }).length > 0);
+});
+
+test('rollDice 4d6dl', () => {
+  let i = 0;
+  const seq = [0.0, 0.9, 0.5, 0.2]; // -> 1,6,4,2 drop 1 => 6+4+2=12
+  const rolls = rollDice('4d6dl', () => seq[i++] ?? 0);
+  assert.equal(sum(rolls), 12);
+});
+
+test('snapshotHash stable', () => {
+  const system = minimalSystem();
+  const a = snapshotHash(system);
+  const b = snapshotHash({ ...system, name: 'Other display name' });
+  // name is not part of hash payload — hash equal
+  assert.equal(a, b);
+  const c = snapshotHash({ ...system, revision: 2 });
+  assert.notEqual(a, c);
+});
+
+test('canonicalJson sorts keys', () => {
+  assert.equal(canonicalJson({ b: 1, a: 2 }), '{"a":2,"b":1}');
+});
+
+test('validateSystemDefinition', () => {
+  const r = validateSystemDefinition(minimalSystem());
+  assert.equal(r.ok, true);
+});
+
+test('validateCreationRules integrates point_buy', () => {
+  const system = minimalSystem();
+  const result = validateCreationRules(
+    system,
+    { attributes: { str: 15, dex: 14, con: 13, int: 12, wis: 10, cha: 8 } },
+    'point_buy',
+  );
+  assert.equal(result.ok, true);
+});
+
+test('buildFormulaContext', () => {
+  const ctx = buildFormulaContext({ attributes: { str: 10 }, resources: { hp: 8 } });
+  assert.equal(ctx['attr.str'], 10);
+  assert.equal(ctx['resource.hp'], 8);
+});
+
+function minimalSystem(): SystemDefinition {
+  return {
+    format: SYSTEM_FORMAT,
+    formatVersion: FORMAT_VERSION,
+    id: 'test',
+    name: 'Test',
+    schemaVersion: 1,
+    revision: 1,
+    bricks: {
+      attributes: [
+        { key: 'str', label: 'STR', scale: 'numeric', min: 8, max: 15, default: 10 },
+        { key: 'dex', label: 'DEX', scale: 'numeric', min: 8, max: 15, default: 10 },
+        { key: 'con', label: 'CON', scale: 'numeric', min: 8, max: 15, default: 10 },
+        { key: 'int', label: 'INT', scale: 'numeric', min: 8, max: 15, default: 10 },
+        { key: 'wis', label: 'WIS', scale: 'numeric', min: 8, max: 15, default: 10 },
+        { key: 'cha', label: 'CHA', scale: 'numeric', min: 8, max: 15, default: 10 },
+      ],
+      derived: [
+        {
+          key: 'strMod',
+          label: 'STR Mod',
+          formula: 'floor((attr.str - 10) / 2)',
+          dependsOn: ['attr.str'],
+        },
+      ],
+    },
+    creationRules: [
+      {
+        id: 'pb',
+        type: 'point_buy',
+        appliesTo: 'attribute',
+        params: {
+          budget: 27,
+          keys: ['str', 'dex', 'con', 'int', 'wis', 'cha'],
+        },
+      },
+    ],
+    sheetLayout: {
+      pageSize: 'fluid',
+      grid: { size: 8 },
+      pages: [{ id: 'main', label: 'Main', widgets: [] }],
+    },
+  };
+}
diff --git a/app/shared/characterSheet/creation.ts b/app/shared/characterSheet/creation.ts
new file mode 100644
index 0000000..bc9f207
--- /dev/null
+++ b/app/shared/characterSheet/creation.ts
@@ -0,0 +1,143 @@
+import type {
+  CharacterValues,
+  CreationRule,
+  SystemDefinition,
+  ValidationIssue,
+  ValidationResult,
+} from './types';
+
+function err(path: string, message: string, code: string): ValidationIssue {
+  return { path, message, code };
+}
+
+export function validatePointBuy(
+  rule: CreationRule,
+  attributes: Record<string, number | string | boolean>,
+): ValidationIssue[] {
+  const budget = Number(rule.params.budget ?? 27);
+  const costs = (rule.params.costs as Record<string, number> | undefined) ?? {
+    '8': 0,
+    '9': 1,
+    '10': 2,
+    '11': 3,
+    '12': 4,
+    '13': 5,
+    '14': 7,
+    '15': 9,
+  };
+  const keys = (rule.params.keys as string[] | undefined) ?? Object.keys(attributes);
+  let spent = 0;
+  const issues: ValidationIssue[] = [];
+  for (const key of keys) {
+    const raw = attributes[key];
+    if (typeof raw !== 'number') {
+      issues.push(err(`attributes.${key}`, 'Point buy requires numeric attribute', 'point_buy_type'));
+      continue;
+    }
+    const c = costs[String(raw)];
+    if (c === undefined) {
+      issues.push(err(`attributes.${key}`, `Value ${raw} is not in point-buy cost table`, 'point_buy_value'));
+      continue;
+    }
+    spent += c;
+  }
+  if (spent > budget) {
+    issues.push(err('creation.point_buy', `Spent ${spent} exceeds budget ${budget}`, 'point_buy_budget'));
+  }
+  return issues;
+}
+
+export function validateRoll(
+  rule: CreationRule,
+  values: CharacterValues,
+): ValidationIssue[] {
+  const issues: ValidationIssue[] = [];
+  const keys = (rule.params.keys as string[] | undefined) ?? [];
+  const min = Number(rule.params.min ?? 3);
+  const max = Number(rule.params.max ?? 18);
+  for (const key of keys) {
+    const v = values.attributes?.[key];
+    if (typeof v !== 'number') {
+      issues.push(err(`attributes.${key}`, 'Roll strategy expects a number', 'roll_type'));
+      continue;
+    }
+    if (v < min || v > max) {
+      issues.push(err(`attributes.${key}`, `Value ${v} out of roll range ${min}-${max}`, 'roll_range'));
+    }
+  }
+  return issues;
+}
+
+export function validateArray(
+  rule: CreationRule,
+  attributes: Record<string, number | string | boolean>,
+): ValidationIssue[] {
+  const array = (rule.params.array as number[] | undefined) ?? [15, 14, 13, 12, 10, 8];
+  const keys = (rule.params.keys as string[] | undefined) ?? Object.keys(attributes);
+  const used = keys.map((k) => attributes[k]).filter((v): v is number => typeof v === 'number');
+  const sortedUsed = [...used].sort((a, b) => b - a);
+  const sortedArray = [...array].sort((a, b) => b - a);
+  if (sortedUsed.length !== sortedArray.length || sortedUsed.some((v, i) => v !== sortedArray[i])) {
+    return [err('creation.array', 'Attributes must be a permutation of the fixed array', 'array_mismatch')];
+  }
+  return [];
+}
+
+export function validateCreationRules(
+  system: SystemDefinition,
+  values: CharacterValues,
+  activeStrategy?: string,
+): ValidationResult {
+  const errors: ValidationIssue[] = [];
+  const rules = activeStrategy
+    ? system.creationRules.filter((r) => r.type === activeStrategy)
+    : system.creationRules;
+
+  for (const rule of rules) {
+    if (rule.type === 'point_buy') errors.push(...validatePointBuy(rule, values.attributes ?? {}));
+    if (rule.type === 'roll') errors.push(...validateRoll(rule, values));
+    if (rule.type === 'array') errors.push(...validateArray(rule, values.attributes ?? {}));
+  }
+
+  for (const attr of system.bricks.attributes ?? []) {
+    const v = values.attributes?.[attr.key];
+    if (v === undefined) continue;
+    if (typeof v === 'number') {
+      if (attr.min !== undefined && v < attr.min) {
+        errors.push(err(`attributes.${attr.key}`, `Below min ${attr.min}`, 'attr_min'));
+      }
+      if (attr.max !== undefined && v > attr.max) {
+        errors.push(err(`attributes.${attr.key}`, `Above max ${attr.max}`, 'attr_max'));
+      }
+    }
+  }
+
+  return { ok: errors.length === 0, errors };
+}
+
+/** Deterministic dice roller for tests / roll strategy. */
+export function rollDice(expr: string, rng: () => number = Math.random): number[] {
+  // formats: NdM, NdMdl (drop lowest), NdMdh (drop highest)
+  const m = /^(\d+)d(\d+)(dl|dh)?$/i.exec(expr.trim());
+  if (!m) throw new Error(`Unsupported dice expression '${expr}'`);
+  const n = Number(m[1]);
+  const sides = Number(m[2]);
+  const drop = m[3]?.toLowerCase();
+  const rolls: number[] = [];
+  for (let i = 0; i < n; i += 1) {
+    rolls.push(1 + Math.floor(rng() * sides));
+  }
+  if (drop === 'dl') {
+    const idx = rolls.indexOf(Math.min(...rolls));
+    return rolls.filter((_, i) => i !== idx);
+  }
+  if (drop === 'dh') {
+    const idx = rolls.indexOf(Math.max(...rolls));
+    return rolls.filter((_, i) => i !== idx);
+  }
+  return rolls;
+}
+
+export function sum(nums: number[]): number {
+  return nums.reduce((a, b) => a + b, 0);
+}
diff --git a/app/shared/characterSheet/derived.ts b/app/shared/characterSheet/derived.ts
new file mode 100644
index 0000000..eec0705
--- /dev/null
+++ b/app/shared/characterSheet/derived.ts
@@ -0,0 +1,66 @@
+import type { DerivedDefinition } from './types';
+import { buildFormulaContext, evaluateFormula } from './formula';
+
+export class CycleError extends Error {
+  constructor(message: string) {
+    super(message);
+    this.name = 'CycleError';
+  }
+}
+
+/** Kahn topological sort of derived definitions by dependsOn keys (derived.* or attr.* etc.). */
+export function sortDerived(defs: DerivedDefinition[]): DerivedDefinition[] {
+  const byKey = new Map(defs.map((d) => [d.key, d]));
+  const indeg = new Map<string, number>();
+  const adj = new Map<string, string[]>();
+
+  for (const d of defs) {
+    indeg.set(d.key, 0);
+    adj.set(d.key, []);
+  }
+
+  for (const d of defs) {
+    for (const dep of d.dependsOn) {
+      const depKey = dep.startsWith('derived.') ? dep.slice('derived.'.length) : null;
+      if (depKey && byKey.has(depKey)) {
+        adj.get(depKey)!.push(d.key);
+        indeg.set(d.key, (indeg.get(d.key) ?? 0) + 1);
+      }
+    }
+  }
+
+  const queue = [...indeg.entries()].filter(([, n]) => n === 0).map(([k]) => k);
+  const ordered: DerivedDefinition[] = [];
+  while (queue.length) {
+    const k = queue.shift()!;
+    const def = byKey.get(k);
+    if (def) ordered.push(def);
+    for (const next of adj.get(k) ?? []) {
+      const n = (indeg.get(next) ?? 0) - 1;
+      indeg.set(next, n);
+      if (n === 0) queue.push(next);
+    }
+  }
+
+  if (ordered.length !== defs.length) {
+    throw new CycleError('Derived definitions contain a cycle');
+  }
+  return ordered;
+}
+
+export function computeDerived(
+  defs: DerivedDefinition[],
+  values: {
+    attributes?: Record<string, number | string | boolean>;
+    skills?: Record<string, number | string | boolean>;
+    resources?: Record<string, number>;
+  },
+): Record<string, number> {
+  const ordered = sortDerived(defs);
+  const derived: Record<string, number> = {};
+  for (const d of ordered) {
+    const ctx = buildFormulaContext({ ...values, derived });
+    derived[d.key] = evaluateFormula(d.formula, ctx, d.round ?? 'none');
+  }
+  return derived;
+}
diff --git a/app/shared/characterSheet/formula.ts b/app/shared/characterSheet/formula.ts
new file mode 100644
index 0000000..3b8ee1f
--- /dev/null
+++ b/app/shared/characterSheet/formula.ts
@@ -0,0 +1,187 @@
+/** Minimal safe formula DSL for derived stats. */
+
+export type FormulaRound = 'floor' | 'ceil' | 'round' | 'none';
+
+export type FormulaContext = Record<string, number>;
+
+const IDENT = /^(attr|skill|resource|derived|val)\.[A-Za-z_][A-Za-z0-9_]*$/;
+
+function tokenize(input: string): string[] {
+  const src = input.replace(/\s+/g, '');
+  const tokens: string[] = [];
+  let i = 0;
+  while (i < src.length) {
+    const ch = src[i]!;
+    if ('+-*/%(),'.includes(ch)) {
+      tokens.push(ch);
+      i += 1;
+      continue;
+    }
+    if (/[0-9.]/.test(ch)) {
+      let j = i + 1;
+      while (j < src.length && /[0-9.]/.test(src[j]!)) j += 1;
+      tokens.push(src.slice(i, j));
+      i = j;
+      continue;
+    }
+    if (/[A-Za-z_]/.test(ch)) {
+      let j = i + 1;
+      while (j < src.length && /[A-Za-z0-9_.]/.test(src[j]!)) j += 1;
+      tokens.push(src.slice(i, j));
+      i = j;
+      continue;
+    }
+    throw new Error(`Unexpected character '${ch}' in formula`);
+  }
+  return tokens;
+}
+
+type Parser = {
+  tokens: string[];
+  i: number;
+  ctx: FormulaContext;
+};
+
+function peek(p: Parser): string | undefined {
+  return p.tokens[p.i];
+}
+
+function consume(p: Parser, expected?: string): string {
+  const t = p.tokens[p.i];
+  if (t === undefined) throw new Error('Unexpected end of formula');
+  if (expected !== undefined && t !== expected) throw new Error(`Expected '${expected}', got '${t}'`);
+  p.i += 1;
+  return t;
+}
+
+function parseExpression(p: Parser): number {
+  let left = parseTerm(p);
+  while (peek(p) === '+' || peek(p) === '-') {
+    const op = consume(p);
+    const right = parseTerm(p);
+    left = op === '+' ? left + right : left - right;
+  }
+  return left;
+}
+
+function parseTerm(p: Parser): number {
+  let left = parseUnary(p);
+  while (peek(p) === '*' || peek(p) === '/' || peek(p) === '%') {
+    const op = consume(p);
+    const right = parseUnary(p);
+    if (op === '*') left *= right;
+    else if (op === '/') left /= right;
+    else left %= right;
+  }
+  return left;
+}
+
+function parseUnary(p: Parser): number {
+  if (peek(p) === '-') {
+    consume(p);
+    return -parseUnary(p);
+  }
+  if (peek(p) === '+') {
+    consume(p);
+    return parseUnary(p);
+  }
+  return parsePrimary(p);
+}
+
+function parsePrimary(p: Parser): number {
+  const t = peek(p);
+  if (t === undefined) throw new Error('Unexpected end of formula');
+  if (t === '(') {
+    consume(p, '(');
+    const v = parseExpression(p);
+    consume(p, ')');
+    return v;
+  }
+  if (/^[0-9]+(\.[0-9]+)?$/.test(t)) {
+    consume(p);
+    return Number(t);
+  }
+  if (IDENT.test(t)) {
+    consume(p);
+    const v = p.ctx[t];
+    if (typeof v !== 'number' || Number.isNaN(v)) {
+      throw new Error(`Unknown or non-numeric identifier '${t}'`);
+    }
+    return v;
+  }
+  // function call
+  if (/^[A-Za-z_][A-Za-z0-9_]*$/.test(t) && p.tokens[p.i + 1] === '(') {
+    const name = consume(p);
+    consume(p, '(');
+    const args: number[] = [];
+    if (peek(p) !== ')') {
+      args.push(parseExpression(p));
+      while (peek(p) === ',') {
+        consume(p, ',');
+        args.push(parseExpression(p));
+      }
+    }
+    consume(p, ')');
+    return callFn(name, args);
+  }
+  throw new Error(`Unexpected token '${t}'`);
+}
+
+function callFn(name: string, args: number[]): number {
+  switch (name) {
+    case 'floor':
+      return Math.floor(args[0] ?? 0);
+    case 'ceil':
+      return Math.ceil(args[0] ?? 0);
+    case 'round':
+      return Math.round(args[0] ?? 0);
+    case 'abs':
+      return Math.abs(args[0] ?? 0);
+    case 'min':
+      return Math.min(...args);
+    case 'max':
+      return Math.max(...args);
+    case 'clamp': {
+      const [v = 0, lo = 0, hi = 0] = args;
+      return Math.min(hi, Math.max(lo, v));
+    }
+    default:
+      throw new Error(`Unknown function '${name}'`);
+  }
+}
+
+export function evaluateFormula(
+  formula: string,
+  ctx: FormulaContext,
+  round: FormulaRound = 'none',
+): number {
+  const p: Parser = { tokens: tokenize(formula), i: 0, ctx };
+  const value = parseExpression(p);
+  if (p.i !== p.tokens.length) throw new Error('Trailing tokens in formula');
+  if (round === 'floor') return Math.floor(value);
+  if (round === 'ceil') return Math.ceil(value);
+  if (round === 'round') return Math.round(value);
+  return value;
+}
+
+export function buildFormulaContext(values: {
+  attributes?: Record<string, number | string | boolean>;
+  skills?: Record<string, number | string | boolean>;
+  resources?: Record<string, number>;
+  derived?: Record<string, number>;
+}): FormulaContext {
+  const ctx: FormulaContext = {};
+  for (const [k, v] of Object.entries(values.attributes ?? {})) {
+    if (typeof v === 'number') ctx[`attr.${k}`] = v;
+  }
+  for (const [k, v] of Object.entries(values.skills ?? {})) {
+    if (typeof v === 'number') ctx[`skill.${k}`] = v;
+  }
+  for (const [k, v] of Object.entries(values.resources ?? {})) {
+    ctx[`resource.${k}`] = v;
+  }
+  for (const [k, v] of Object.entries(values.derived ?? {})) {
+    ctx[`derived.${k}`] = v;
+  }
+  return ctx;
+}
diff --git a/app/shared/characterSheet/index.ts b/app/shared/characterSheet/index.ts
new file mode 100644
index 0000000..49bce7a
--- /dev/null
+++ b/app/shared/characterSheet/index.ts
@@ -0,0 +1,6 @@
+export * from './types';
+export * from './formula';
+export * from './derived';
+export * from './creation';
+export * from './snapshot';
+export * from './systemValidate';
diff --git a/app/shared/characterSheet/snapshot.ts b/app/shared/characterSheet/snapshot.ts
new file mode 100644
index 0000000..be7da0b
--- /dev/null
+++ b/app/shared/characterSheet/snapshot.ts
@@ -0,0 +1,34 @@
+import { createHash } from 'node:crypto';
+
+import type { SystemDefinition } from './types';
+
+/** Canonical JSON for stable hashing (sorted keys). */
+export function canonicalJson(value: unknown): string {
+  return JSON.stringify(sortKeys(value));
+}
+
+function sortKeys(value: unknown): unknown {
+  if (Array.isArray(value)) return value.map(sortKeys);
+  if (value && typeof value === 'object') {
+    const obj = value as Record<string, unknown>;
+    const out: Record<string, unknown> = {};
+    for (const key of Object.keys(obj).sort()) {
+      out[key] = sortKeys(obj[key]);
+    }
+    return out;
+  }
+  return value;
+}
+
+export function snapshotHash(system: SystemDefinition): string {
+  const payload = {
+    id: system.id,
+    schemaVersion: system.schemaVersion,
+    revision: system.revision,
+    bricks: system.bricks,
+    creationRules: system.creationRules,
+    sheetLayout: system.sheetLayout,
+    compendium: system.compendium,
+  };
+  return createHash('sha256').update(canonicalJson(payload)).digest('hex');
+}
diff --git a/app/shared/characterSheet/systemValidate.ts b/app/shared/characterSheet/systemValidate.ts
new file mode 100644
index 0000000..e7c4751
--- /dev/null
+++ b/app/shared/characterSheet/systemValidate.ts
@@ -0,0 +1,40 @@
+import type { SystemDefinition, ValidationIssue, ValidationResult } from './types';
+import { SYSTEM_FORMAT, FORMAT_VERSION } from './types';
+
+function err(path: string, message: string, code: string): ValidationIssue {
+  return { path, message, code };
+}
+
+export function validateSystemDefinition(system: unknown): ValidationResult {
+  const errors: ValidationIssue[] = [];
+  if (!system || typeof system !== 'object') {
+    return { ok: false, errors: [err('$', 'System must be an object', 'type')] };
+  }
+  const s = system as Partial<SystemDefinition>;
+  if (s.format !== SYSTEM_FORMAT) errors.push(err('format', `Expected ${SYSTEM_FORMAT}`, 'format'));
+  if (s.formatVersion !== FORMAT_VERSION) {
+    errors.push(err('formatVersion', `Expected ${FORMAT_VERSION}`, 'formatVersion'));
+  }
+  if (!s.id || typeof s.id !== 'string') errors.push(err('id', 'id required', 'required'));
+  if (!s.name || typeof s.name !== 'string') errors.push(err('name', 'name required', 'required'));
+  if (typeof s.schemaVersion !== 'number') errors.push(err('schemaVersion', 'number required', 'type'));
+  if (typeof s.revision !== 'number') errors.push(err('revision', 'number required', 'type'));
+  if (!s.bricks || typeof s.bricks !== 'object') errors.push(err('bricks', 'bricks required', 'required'));
+  if (!Array.isArray(s.creationRules)) errors.push(err('creationRules', 'array required', 'type'));
+  if (!s.sheetLayout || !Array.isArray(s.sheetLayout.pages)) {
+    errors.push(err('sheetLayout.pages', 'pages required', 'required'));
+  }
+
+  const derived = s.bricks?.derived ?? [];
+  const keys = new Set(derived.map((d) => d.key));
+  for (const d of derived) {
+    if (!d.formula) errors.push(err(`derived.${d.key}`, 'formula required', 'required'));
+    for (const dep of d.dependsOn ?? []) {
+      if (dep.startsWith('derived.') && !keys.has(dep.slice('derived.'.length))) {
+        // allow forward refs; cycle checked elsewhere
+      }
+    }
+  }
+
+  return { ok: errors.length === 0, errors };
+}
diff --git a/app/shared/characterSheet/types.ts b/app/shared/characterSheet/types.ts
new file mode 100644
index 0000000..10ed76b
--- /dev/null
+++ b/app/shared/characterSheet/types.ts
@@ -0,0 +1,223 @@
+/** Portable TTRPG system / character contract (builder + player + future mobile). */
+
+export const SYSTEM_FORMAT = 'ttrpg-system' as const;
+export const CHARACTER_FORMAT = 'ttrpg-character' as const;
+export const FORMAT_VERSION = 1 as const;
+
+export type ScaleKind = 'numeric' | 'dice' | 'percent' | 'rank' | 'pool' | 'boolean';
+
+export type AttributeDefinition = {
+  key: string;
+  label: string;
+  scale: ScaleKind;
+  min?: number;
+  max?: number;
+  default?: number | string | boolean;
+  category?: 'physical' | 'mental' | 'social' | 'other';
+  costPerPoint?: number;
+};
+
+export type SkillDefinition = {
+  key: string;
+  label: string;
+  linkedAttribute?: string;
+  scale: ScaleKind;
+  min?: number;
+  max?: number;
+  default?: number | string | boolean;
+};
+
+export type ResourceDefinition = {
+  key: string;
+  label: string;
+  min?: number;
+  max?: number | string;
+  default?: number;
+  track?: boolean;
+};
+
+export type TraitDefinition = {
+  key: string;
+  label: string;
+  description?: string;
+  tags?: string[];
+  prerequisites?: string[];
+};
+
+export type DerivedDefinition = {
+  key: string;
+  label: string;
+  formula: string;
+  dependsOn: string[];
+  round?: 'floor' | 'ceil' | 'round' | 'none';
+};
+
+export type ProgressionNode = {
+  id: string;
+  label: string;
+  kind: 'career' | 'feat' | 'talent' | 'other';
+  traitKey?: string;
+  position?: { x: number; y: number };
+};
+
+export type ProgressionEdge = {
+  id: string;
+  source: string;
+  target: string;
+  kind?: 'prerequisite' | 'exit' | 'unlock';
+};
+
+export type ProgressionDefinition = {
+  label?: string;
+  graph: {
+    nodes: ProgressionNode[];
+    edges: ProgressionEdge[];
+  };
+};
+
+export type CreationStrategy =
+  | 'point_buy'
+  | 'roll'
+  | 'array'
+  | 'priority'
+  | 'life_path'
+  | 'funnel';
+
+export type CreationRule = {
+  id: string;
+  type: CreationStrategy;
+  appliesTo: 'attribute' | 'skill' | 'any';
+  params: Record<string, unknown>;
+};
+
+export type WidgetType =
+  | 'text'
+  | 'number'
+  | 'modBadge'
+  | 'skillRow'
+  | 'skillList'
+  | 'resourceBar'
+  | 'checkbox'
+  | 'tagList'
+  | 'section'
+  | 'portrait'
+  | 'notes'
+  | 'table'
+  | 'repeatingTable'
+  | 'statBlock'
+  | 'dots'
+  | 'percent'
+  | 'rankEnum'
+  | 'track'
+  | 'clock'
+  | 'slotMatrix'
+  | 'diceStep'
+  | 'locationBar'
+  | 'spellCards'
+  | 'unknownWidget';
+
+export type WidgetFrame = { x: number; y: number; w: number; h: number };
+
+export type SheetWidget = {
+  id: string;
+  type: WidgetType;
+  bind?: string;
+  frame: WidgetFrame;
+  responsive?: { sm?: Partial<WidgetFrame> & { hide?: boolean; stack?: boolean } };
+  props?: Record<string, unknown>;
+};
+
+export type SheetPage = {
+  id: string;
+  label: string;
+  widgets: SheetWidget[];
+};
+
+export type SheetLayout = {
+  pageSize: 'letter' | 'a4' | 'fluid' | { w: number; h: number };
+  grid: { size: number; columns?: number };
+  pages: SheetPage[];
+};
+
+export type CompendiumSpell = {
+  id: string;
+  name: string;
+  level: number;
+  school?: string;
+  source?: string;
+  classes?: string[];
+  castingTime?: string;
+  range?: string;
+  components?: string;
+  duration?: string;
+  description?: string;
+  tags?: string[];
+};
+
+export type SystemBricks = {
+  attributes?: AttributeDefinition[];
+  skills?: SkillDefinition[];
+  resources?: ResourceDefinition[];
+  traits?: TraitDefinition[];
+  derived?: DerivedDefinition[];
+  progression?: ProgressionDefinition;
+  constraints?: Record<string, unknown>[];
+};
+
+export type SystemDefinition = {
+  format: typeof SYSTEM_FORMAT;
+  formatVersion: typeof FORMAT_VERSION;
+  id: string;
+  name: string;
+  description?: string;
+  edition?: string;
+  schemaVersion: number;
+  revision: number;
+  bricks: SystemBricks;
+  creationRules: CreationRule[];
+  sheetLayout: SheetLayout;
+  compendium?: {
+    spells?: CompendiumSpell[];
+  };
+  theme?: { tokenOverrides?: Record<string, string> };
+};
+
+export type CharacterValues = {
+  meta?: Record<string, unknown>;
+  attributes?: Record<string, number | string | boolean>;
+  skills?: Record<string, number | string | boolean>;
+  resources?: Record<string, number>;
+  traits?: string[];
+  ownedTraitIds?: string[];
+  spells?: Array<{ id: string; prepared?: boolean; notes?: string }>;
+  inventory?: Array<Record<string, unknown>>;
+  derived?: Record<string, number>;
+  [key: string]: unknown;
+};
+
+export type CharacterSheet = {
+  format: typeof CHARACTER_FORMAT;
+  formatVersion: typeof FORMAT_VERSION;
+  id: string;
+  name: string;
+  systemId: string;
+  schemaVersion: number;
+  revisionAtCreate: number;
+  values: CharacterValues;
+  creation?: {
+    strategy?: CreationStrategy;
+    seed?: number;
+    rolls?: unknown;
+  };
+};
+
+export type ValidationIssue = {
+  path: string;
+  message: string;
+  code: string;
+};
+
+export type ValidationResult = {
+  ok: boolean;
+  errors: ValidationIssue[];
+};
diff --git a/app/shared/ipc/contracts.ts b/app/shared/ipc/contracts.ts
index 061ec05..3172ca4 100644
--- a/app/shared/ipc/contracts.ts
+++ b/app/shared/ipc/contracts.ts
@@ -76,11 +76,22 @@ import type {
   StorylineListItem,
   StorylineSelection,
 } from '../graph/storylineExportImport';
+import type { SystemDefinition } from '../characterSheet/types';
+
+/** Catalog row for imported TTRPG systems (userData/game-systems). */
+export type GameSystemListItem = {
+  id: string;
+  name: string;
+  edition?: string;
+  schemaVersion: number;
+  revision: number;
+};
 
 export const ipcChannels = {
   app: {
     quit: 'app.quit',
     getVersion: 'app.getVersion',
+    openExternal: 'app.openExternal',
   },
   updater: {
     check: 'updater.check',
@@ -284,6 +295,14 @@ export const ipcChannels = {
     upsertProgress: 'players.upsertProgress',
     stateChanged: 'players.stateChanged',
   },
+  gameSystems: {
+    list: 'gameSystems.list',
+    importFromFile: 'gameSystems.importFromFile',
+    delete: 'gameSystems.delete',
+    get: 'gameSystems.get',
+    bindSnapshot: 'gameSystems.bindSnapshot',
+    getSnapshot: 'gameSystems.getSnapshot',
+  },
   playlists: {
     getState: 'playlists.getState',
     create: 'playlists.create',
@@ -427,6 +446,10 @@ export type IpcInvokeMap = {
     req: Record<string, never>;
     res: { version: string; buildNumber: string | null; packaged: boolean };
   };
+  [ipcChannels.app.openExternal]: {
+    req: { url: string };
+    res: { ok: true } | { ok: false; error: string };
+  };
   [ipcChannels.updater.check]: {
     req: Record<string, never>;
     res: UpdaterCheckResponse;
@@ -1052,6 +1075,30 @@ export type IpcInvokeMap = {
     req: { id: PlayerId };
     res: { url: string | null };
   };
+  [ipcChannels.gameSystems.list]: {
+    req: Record<string, never>;
+    res: { systems: GameSystemListItem[] };
+  };
+  [ipcChannels.gameSystems.importFromFile]: {
+    req: Record<string, never>;
+    res: { canceled: true } | { canceled: false; system: GameSystemListItem };
+  };
+  [ipcChannels.gameSystems.delete]: {
+    req: { id: string };
+    res: { ok: true };
+  };
+  [ipcChannels.gameSystems.get]: {
+    req: { id: string };
+    res: { system: SystemDefinition | null };
+  };
+  [ipcChannels.gameSystems.bindSnapshot]: {
+    req: { systemId: string };
+    res: { systemId: string; snapshotHash: string; system: SystemDefinition };
+  };
+  [ipcChannels.gameSystems.getSnapshot]: {
+    req: { hash: string };
+    res: { system: SystemDefinition | null };
+  };
   [ipcChannels.playlists.getState]: {
     req: Record<string, never>;
     res: PlaylistsState;
diff --git a/app/shared/types/appPlayers.ts b/app/shared/types/appPlayers.ts
index 2e8ba8f..a41edbf 100644
--- a/app/shared/types/appPlayers.ts
+++ b/app/shared/types/appPlayers.ts
@@ -31,6 +31,16 @@ export type AppPlayer = {
   imageOffset: PlayerImageOffset;
   /** Масштаб аватара внутри круга (1 = по умолчанию). */
   imageScale: number;
+  /** Optional TTRPG system id from Game Systems catalog. */
+  systemId?: string | null;
+  /** Frozen sheet binding: snapshotHash + values (schema freeze on bind). */
+  characterSheet?: {
+    systemId: string;
+    snapshotHash: string;
+    schemaVersion: number;
+    revisionAtBind: number;
+    values: Record<string, unknown>;
+  } | null;
 };
 
 /** Расстановка кампанийного НПС на карте как игрового токена (в проекте). */
@@ -276,7 +286,7 @@ export function normalizeAppPlayer(raw: unknown, teamIds?: Set<string>): AppPlay
   if (typeof obj.teamId === 'string' && obj.teamId) {
     if (!teamIds || teamIds.has(obj.teamId)) teamId = asPlayerTeamId(obj.teamId);
   }
-  return {
+  const out: AppPlayer = {
     id: asPlayerId(obj.id),
     name,
     imageRelPath: obj.imageRelPath,
@@ -286,6 +296,35 @@ export function normalizeAppPlayer(raw: unknown, teamIds?: Set<string>): AppPlay
     imageOffset: clampPlayerImageOffset(obj.imageOffset),
     imageScale: clampPlayerImageScale((obj as { imageScale?: unknown }).imageScale),
   };
+  if (obj.systemId === null) out.systemId = null;
+  else if (typeof obj.systemId === 'string') out.systemId = obj.systemId;
+  if (obj.characterSheet === null) out.characterSheet = null;
+  else if (obj.characterSheet && typeof obj.characterSheet === 'object') {
+    const cs = obj.characterSheet as {
+      systemId?: unknown;
+      snapshotHash?: unknown;
+      schemaVersion?: unknown;
+      revisionAtBind?: unknown;
+      values?: unknown;
+    };
+    if (
+      typeof cs.systemId === 'string' &&
+      typeof cs.snapshotHash === 'string' &&
+      typeof cs.schemaVersion === 'number' &&
+      typeof cs.revisionAtBind === 'number' &&
+      cs.values &&
+      typeof cs.values === 'object'
+    ) {
+      out.characterSheet = {
+        systemId: cs.systemId,
+        snapshotHash: cs.snapshotHash,
+        schemaVersion: cs.schemaVersion,
+        revisionAtBind: cs.revisionAtBind,
+        values: cs.values as Record<string, unknown>,
+      };
+    }
+  }
+  return out;
 }
 
 export function normalizeSceneNpcToken(raw: unknown): SceneNpcToken | null {
diff --git a/app/shared/types/diceRoll.ts b/app/shared/types/diceRoll.ts
index 6f2c049..25790ee 100644
--- a/app/shared/types/diceRoll.ts
+++ b/app/shared/types/diceRoll.ts
@@ -14,8 +14,10 @@ export type DiceRollRequest = {
 
 export type DiceRollState = {
   revision: number;
-  /** Идёт показ броска (оверлей виден). */
+  /** Идёт показ броска (оверлей виден на презентации). */
   active: boolean;
+  /** Показывать 3D-анимацию игрокам на экране презентации. */
+  visibleToPlayers: boolean;
   /** Например "2d20". */
   notation: string;
   /** Заранее выбранные исходы — для синхрона пульт/презентация. */
@@ -27,6 +29,7 @@ export type DiceRollState = {
 
 export type DiceRollEvent =
   | { kind: 'roll'; count: number; sides: DiceSides }
+  | { kind: 'setVisibleToPlayers'; visible: boolean }
   | { kind: 'hideOverlay' }
   | { kind: 'clear' };
 
@@ -34,6 +37,7 @@ export function createInitialDiceRollState(): DiceRollState {
   return {
     revision: 1,
     active: false,
+    visibleToPlayers: true,
     notation: '',
     values: [],
     total: 0,
@@ -41,9 +45,13 @@ export function createInitialDiceRollState(): DiceRollState {
   };
 }
 
+/** Минимум / максимум количества кубиков в UI и store. */
+export const DICE_COUNT_MIN = 0;
+export const DICE_COUNT_MAX = 20;
+
 export function clampDiceCount(n: number): number {
-  if (!Number.isFinite(n)) return 1;
-  return Math.max(1, Math.min(20, Math.round(n)));
+  if (!Number.isFinite(n)) return DICE_COUNT_MIN;
+  return Math.max(DICE_COUNT_MIN, Math.min(DICE_COUNT_MAX, Math.round(n)));
 }
 
 /** Грани d100 в dice-box-threejs: 10,20,…,90,100 (лицо «00»). */
diff --git a/docs/instructions-new-features-after-1.0.29.md b/docs/instructions-new-features-after-1.0.29.md
index e32582e..37f257a 100644
--- a/docs/instructions-new-features-after-1.0.29.md
+++ b/docs/instructions-new-features-after-1.0.29.md
@@ -9,16 +9,17 @@
 **Где:** Пульт → **Инструменты** → 🎲 **Кубики**.
 
 1. Выберите тип кубика: d4, d6, d8, d10, d12, d20 или d100.
-2. Задайте **Количество** кнопками **−** / **+** (от 1 до 20).
-3. Нажмите **Бросить**.
-4. На экране игроков (презентация) проиграет 3D-анимация; в окне «Кубики» сразу появятся грани и **Сумма**.
-5. Чтобы убрать кубики с экрана и очистить результат — **Убрать**.
-6. **Esc** закрывает окно (результат на экране при этом не снимается, пока не нажали **Убрать**).
+2. Задайте **Количество** кнопками **−** / **+** или введите число вручную (от 0 до 20).
+3. При необходимости включите **Показать анимацию игрокам** (по умолчанию включено).
+4. Нажмите **Бросить**.
+5. Если галочка включена — на экране игроков (презентация) проиграет 3D-анимация; в окне «Кубики» сразу появятся грани и **Сумма**. Если выключена — анимация не показывается, результат виден только мастеру в окне «Кубики».
+6. Чтобы убрать кубики с экрана и очистить результат — **Убрать**.
+7. **Esc** (или крестик) закрывает окно. Если была включена галочка показа игрокам и на экране шла анимация — слой кубиков на презентации тоже скрывается (числа в сессии очищаются кнопкой **Убрать**).
 
 **Важно:**
-- Анимация показывается на **презентации**; мастер смотрит числа в окне «Кубики».
+- Анимация показывается на **презентации** только при включённой галочке; мастер всегда смотрит числа в окне «Кубики».
 - d100 в приложении — кубик **десятков** (грани 10, 20, …, 90, 00/100). Результат совпадает с гранью, а не с диапазоном 20–29.
-- Оверлей не скрывается сам — только кнопкой **Убрать**.
+- Оверлей не скрывается сам после броска — только кнопкой **Убрать**, снятием галочки или закрытием окна «Кубики» (при включённом показе игрокам).
 - Новый бросок можно сделать, не нажимая **Убрать**.
 
 ---
@@ -54,7 +55,7 @@
 3. Включите **Показать игрокам** — виджет появится на предпросмотре и на презентации.
 4. На предпросмотре пульта: перетащите таймер; углы — размер; ручка сверху — поворот. На презентации только просмотр.
 
-**Важно:** пока идёт отсчёт, длительность менять нельзя. При нуле таймер останавливается. Без **Показать игрокам** игроки его не видят.
+**Важно:** пока идёт отсчёт, длительность менять нельзя. При нуле таймер останавливается. Без **Показать игрокам** игроки его не видят. Закрытие окна «Таймер» (Esc / крестик) скрывает виджет с презентации и предпросмотра и ставит отсчёт на паузу, если он шёл.
 
 ---
 
diff --git a/docs/vk-covers/vk-cover-1-1-0.png b/docs/vk-covers/vk-cover-1-1-0.png
new file mode 100644
index 0000000..c10e1ee
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diff --git a/docs/vk-covers/vk-cover-key-mailing.png b/docs/vk-covers/vk-cover-key-mailing.png
new file mode 100644
index 0000000..aed10d6
Binary files /dev/null and b/docs/vk-covers/vk-cover-key-mailing.png differ
diff --git a/docs/vk-covers/vk-cover-keys-sent.png b/docs/vk-covers/vk-cover-keys-sent.png
new file mode 100644
index 0000000..a85ac91
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diff --git a/package.json b/package.json
index b49e686..160a767 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
     "build:obfuscate": "node scripts/build.mjs --production --obfuscate",
     "lint": "eslint . --max-warnings 0",
     "typecheck": "tsc -p tsconfig.eslint.json --noEmit",
-    "test": "tsx --test app/renderer/shared/ui/controls.tooltip.test.ts app/renderer/shared/ui/secondaryWindows.stability.test.ts app/renderer/npcs/tiptapEditorSafe.test.ts app/renderer/editor/state/projectState.race.test.ts app/renderer/editor/fileDrop.test.ts app/shared/graph/sceneListOrder.test.ts app/shared/graph/activeStorylineScenes.test.ts app/renderer/editor/graph/sceneCardById.test.ts app/renderer/editor/i18n/editorMessages.locale.test.ts app/renderer/editor/help/helpLinkify.test.ts app/renderer/editor/sceneDescriptionHtml.test.ts app/shared/graph/storylineExportImport.test.ts app/shared/foundry/foundryGraph.test.ts app/shared/ipc/contracts.mediaRemoval.test.ts app/shared/effectEraserHitTest.test.ts app/shared/fieldEffectEraser.test.ts app/shared/fieldEffectStampPoints.test.ts app/renderer/control/controlApp.effectsPanel.test.ts app/renderer/control/controlApp.audioPerf.networkRegression.test.ts app/renderer/control/controlApp.brushPerf.networkRegression.test.ts app/renderer/shared/useAssetImageUrl.cache.test.ts app/main/sessionIpc.phase6.networkRegression.test.ts app/renderer/shared/sceneOverlay/sceneOverlayHost.test.ts app/renderer/shared/effects/PxiEffectsOverlay.pointer.test.ts app/renderer/shared/traps/trapActivation.test.ts app/renderer/shared/videoSceneMapParity.test.ts app/main/windows/createWindows.editorClose.test.ts app/main/preferences/appPreferences.test.ts app/main/playlists/playlistsStore.test.ts app/main/sessionTimer/timerSessionStore.test.ts app/main/initiative/initiativeSessionStore.test.ts app/main/diceRoll/diceRollSessionStore.test.ts app/main/safeConsole.test.ts app/main/windows/bootWindow.test.ts app/main/effects/effectsStore.test.ts app/main/effects/sceneDarknessStore.test.ts app/main/effects/sceneMarkerStore.test.ts app/shared/sceneMarkerEraser.test.ts app/main/sceneTraps/sceneTrapsStore.test.ts app/main/project/assetPrune.test.ts app/main/project/optimizeImageImport.test.ts app/main/project/scenePreviewThumbnail.test.ts app/main/project/fsRetry.test.ts app/main/project/ensureParentDir.test.ts app/main/project/zipRead.test.ts app/main/project/replaceFileAtomic.test.ts app/main/project/zipStore.legacyContract.test.ts app/shared/package.build.test.ts app/shared/license/canonicalJson.test.ts app/shared/license/productKey.test.ts app/shared/license/licenseService.networkRegression.test.ts app/shared/video/videoPlaybackPerf.networkRegression.test.ts app/shared/video/videoPlaybackLoop.networkRegression.test.ts app/main/license/verifyLicenseToken.test.ts app/main/license/machineFingerprint.test.ts app/shared/types/sceneAudioRef.test.ts app/shared/types/appPlayers.test.ts app/shared/types/npcDisposition.test.ts app/shared/types/npcExternalUrl.test.ts app/main/npcs/npcsOverlayStore.test.ts app/shared/types/sceneGrid.test.ts app/shared/types/sceneGridSnap.test.ts app/shared/types/sceneDarkness.test.ts app/shared/types/materialLegend.test.ts app/main/tokens/tokenGridSnapSessionStore.test.ts app/shared/players/playerTeams.test.ts app/shared/players/launchPlayersSelection.test.ts app/main/players/playersStore.test.ts app/main/players/sceneNpcTokensSessionStore.test.ts app/main/players/scenePlayerTokensSessionStore.test.ts app/main/tokens/sceneTokensSessionStore.test.ts app/shared/ipc/contracts.players.test.ts app/shared/types/containMediaRect.test.ts app/shared/types/scenePreviewRotation.test.ts app/shared/types/tokenPath.test.ts app/shared/types/tokenPathPlayback.test.ts app/renderer/shared/tokens/tokenPathLiveDom.test.ts && node --test scripts/build-env.test.mjs scripts/obfuscate-main.test.mjs scripts/release-mac-prep.test.mjs scripts/release-native-prep.test.mjs scripts/verify-packaged-sharp.test.mjs app/main/project/sharpRuntime.test.mjs",
+    "test": "tsx --test app/renderer/shared/ui/controls.tooltip.test.ts app/renderer/shared/ui/secondaryWindows.stability.test.ts app/renderer/npcs/tiptapEditorSafe.test.ts app/renderer/editor/state/projectState.race.test.ts app/renderer/editor/fileDrop.test.ts app/shared/graph/sceneListOrder.test.ts app/shared/graph/activeStorylineScenes.test.ts app/renderer/editor/graph/sceneCardById.test.ts app/renderer/editor/i18n/editorMessages.locale.test.ts app/renderer/editor/help/helpLinkify.test.ts app/renderer/editor/sceneDescriptionHtml.test.ts app/shared/graph/storylineExportImport.test.ts app/shared/foundry/foundryGraph.test.ts app/shared/ipc/contracts.mediaRemoval.test.ts app/shared/effectEraserHitTest.test.ts app/shared/fieldEffectEraser.test.ts app/shared/fieldEffectStampPoints.test.ts app/renderer/control/controlApp.effectsPanel.test.ts app/renderer/control/controlApp.audioPerf.networkRegression.test.ts app/renderer/control/controlApp.brushPerf.networkRegression.test.ts app/renderer/shared/useAssetImageUrl.cache.test.ts app/main/sessionIpc.phase6.networkRegression.test.ts app/renderer/shared/sceneOverlay/sceneOverlayHost.test.ts app/renderer/shared/effects/PxiEffectsOverlay.pointer.test.ts app/renderer/shared/traps/trapActivation.test.ts app/renderer/shared/videoSceneMapParity.test.ts app/main/windows/createWindows.editorClose.test.ts app/main/preferences/appPreferences.test.ts app/main/playlists/playlistsStore.test.ts app/main/sessionTimer/timerSessionStore.test.ts app/main/initiative/initiativeSessionStore.test.ts app/main/diceRoll/diceRollSessionStore.test.ts app/main/safeConsole.test.ts app/main/windows/bootWindow.test.ts app/main/effects/effectsStore.test.ts app/main/effects/sceneDarknessStore.test.ts app/main/effects/sceneMarkerStore.test.ts app/shared/sceneMarkerEraser.test.ts app/main/sceneTraps/sceneTrapsStore.test.ts app/main/project/assetPrune.test.ts app/main/project/optimizeImageImport.test.ts app/main/project/scenePreviewThumbnail.test.ts app/main/project/fsRetry.test.ts app/main/project/ensureParentDir.test.ts app/main/project/zipRead.test.ts app/main/project/replaceFileAtomic.test.ts app/main/project/zipStore.legacyContract.test.ts app/shared/package.build.test.ts app/shared/license/canonicalJson.test.ts app/shared/license/productKey.test.ts app/shared/license/licenseService.networkRegression.test.ts app/shared/video/videoPlaybackPerf.networkRegression.test.ts app/shared/video/videoPlaybackLoop.networkRegression.test.ts app/main/license/verifyLicenseToken.test.ts app/main/license/machineFingerprint.test.ts app/shared/types/sceneAudioRef.test.ts app/shared/types/appPlayers.test.ts app/shared/types/npcDisposition.test.ts app/shared/types/npcExternalUrl.test.ts app/main/npcs/npcsOverlayStore.test.ts app/shared/types/sceneGrid.test.ts app/shared/types/sceneGridSnap.test.ts app/shared/types/sceneDarkness.test.ts app/shared/types/materialLegend.test.ts app/main/tokens/tokenGridSnapSessionStore.test.ts app/shared/players/playerTeams.test.ts app/shared/players/launchPlayersSelection.test.ts app/main/players/playersStore.test.ts app/main/gameSystems/gameSystemsStore.test.ts app/main/players/sceneNpcTokensSessionStore.test.ts app/main/players/scenePlayerTokensSessionStore.test.ts app/main/tokens/sceneTokensSessionStore.test.ts app/shared/ipc/contracts.players.test.ts app/shared/types/containMediaRect.test.ts app/shared/types/scenePreviewRotation.test.ts app/shared/types/tokenPath.test.ts app/shared/types/tokenPathPlayback.test.ts app/renderer/shared/tokens/tokenPathLiveDom.test.ts && node --test scripts/build-env.test.mjs scripts/obfuscate-main.test.mjs scripts/release-mac-prep.test.mjs scripts/release-native-prep.test.mjs scripts/verify-packaged-sharp.test.mjs app/main/project/sharpRuntime.test.mjs",
     "format": "prettier . --check",
     "format:write": "prettier . --write",
     "postinstall": "patch-package",