refactor: rename core-public -> engine-public; fold helpers in; drop shared

Tighten the package model around the determinism invariant: everything the
engine imports must itself be deterministic.

- Rename core-public -> engine-public (package, dir, `engine-public/*` alias,
  all 118 import sites). It is the deterministic public surface the engine
  depends on and that client/server also use.
- Move the pure formatting helpers (renderNumber/renderTroops) from shared
  into engine-public/format — the engine uses them and they're deterministic.
- Drop the now-empty shared package (and its alias). `shared` was intended for
  client/server-shared, engine-forbidden code; there is none yet, so it is
  removed and can be re-added when such code appears.

Final graph: engine-public (leaf) <- engine <- {client, server};
client/server also -> engine-public.

Verified: tsc clean; 1364 + 65 tests pass; prod build succeeds; engine-public
is a leaf; engine has no client/server imports. Lockfile regenerated.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/server/package.json

@@ -5,7 +5,7 @@
   "type": "module",
   "main": "src/Server.ts",
   "dependencies": {
-    "@openfront/core-public": "*",
+    "@openfront/engine-public": "*",
     "@openfront/engine": "*"
   }
 }

packages/server/src/Archive.ts

@@ -6,7 +6,7 @@ import {
   GameRecordSchema,
   ID,
   PartialGameRecord,
-} from "core-public/Schemas";
+} from "engine-public/Schemas";
 import { replacer } from "engine/Util";
 import { logger } from "./Logger";
 import { ServerEnv } from "./ServerEnv";

packages/server/src/Client.ts

@@ -1,7 +1,7 @@
 import WebSocket from "ws";
-import { TokenPayload } from "core-public/ApiSchemas";
+import { TokenPayload } from "engine-public/ApiSchemas";
 import { Tick } from "engine/game/Game";
-import { ClientID, PlayerCosmetics, Winner } from "core-public/Schemas";
+import { ClientID, PlayerCosmetics, Winner } from "engine-public/Schemas";
 
 export class Client {
   public lastPing: number = Date.now();

packages/server/src/ClientMsgRateLimiter.ts

@@ -1,5 +1,5 @@
 import { RateLimiter } from "limiter";
-import { ClientID } from "core-public/Schemas";
+import { ClientID } from "engine-public/Schemas";
 
 const INTENTS_PER_SECOND = 10;
 const INTENTS_PER_MINUTE = 150;

packages/server/src/GameManager.ts

@@ -7,7 +7,7 @@ import {
   GameMode,
   GameType,
 } from "engine/game/Game";
-import { GameConfig, GameID, PublicGameType } from "core-public/Schemas";
+import { GameConfig, GameID, PublicGameType } from "engine-public/Schemas";
 import { Client } from "./Client";
 import { GamePhase, GameServer } from "./GameServer";
 

packages/server/src/GamePreviewBuilder.ts

@@ -1,6 +1,6 @@
 import { z } from "zod";
 import { buildAssetUrl } from "engine/AssetUrls";
-import { ClanTagSchema, GameInfo, UsernameSchema } from "core-public/Schemas";
+import { ClanTagSchema, GameInfo, UsernameSchema } from "engine-public/Schemas";
 import { formatPlayerDisplayName } from "engine/Util";
 import { GameMode } from "engine/game/Game";
 import { getRuntimeAssetManifest } from "./RuntimeAssetManifest";

packages/server/src/GamePreviewRoute.ts

@@ -4,7 +4,7 @@ import { parse } from "node-html-parser";
 import path from "path";
 import type { Logger } from "winston";
 import { z } from "zod";
-import { GAME_ID_REGEX, GameInfo } from "core-public/Schemas";
+import { GAME_ID_REGEX, GameInfo } from "engine-public/Schemas";
 import { replacer } from "engine/Util";
 import type { GameManager } from "./GameManager";
 import {

packages/server/src/GameServer.ts

@@ -2,7 +2,7 @@ import ipAnonymize from "ip-anonymize";
 import { Logger } from "winston";
 import WebSocket from "ws";
 import { z } from "zod";
-import { isAdminRole } from "core-public/ApiSchemas";
+import { isAdminRole } from "engine-public/ApiSchemas";
 import { GameEnv } from "engine/configuration/Config";
 import { GameType } from "engine/game/Game";
 import {
@@ -23,7 +23,7 @@ import {
   ServerTurnMessage,
   StampedIntent,
   Turn,
-} from "core-public/Schemas";
+} from "engine-public/Schemas";
 import { createPartialGameRecord } from "engine/Util";
 import { archive, finalizeGameRecord } from "./Archive";
 import { Client } from "./Client";

packages/server/src/IPCBridgeSchema.ts

@@ -4,7 +4,7 @@ import {
   PublicGameInfoSchema,
   PublicGamesSchema,
   PublicGameTypeSchema,
-} from "core-public/Schemas";
+} from "engine-public/Schemas";
 
 export type WorkerLobbyList = z.infer<typeof WorkerLobbyListSchema>;
 export type WorkerReady = z.infer<typeof WorkerReadySchema>;

packages/server/src/MapPlaylist.ts

@@ -16,7 +16,7 @@ import {
   mapCategories,
 } from "engine/game/Game";
 import { PseudoRandom } from "engine/PseudoRandom";
-import { GameConfig, PublicGameType, TeamCountConfig } from "core-public/Schemas";
+import { GameConfig, PublicGameType, TeamCountConfig } from "engine-public/Schemas";
 import { logger } from "./Logger";
 import { getMapLandTiles } from "./MapLandTiles";
 

packages/server/src/MasterLobbyService.ts

@@ -1,6 +1,6 @@
 import { Worker } from "cluster";
 import winston from "winston";
-import { PublicGameInfo, PublicGameType } from "core-public/Schemas";
+import { PublicGameInfo, PublicGameType } from "engine-public/Schemas";
 import { generateID } from "engine/Util";
 import {
   MasterCreateGame,

packages/server/src/Privilege.ts

@@ -11,15 +11,15 @@ import {
 } from "obscenity";
 import countries from "resources/countries.json";
 
-import { Cosmetics } from "core-public/CosmeticSchemas";
-import { decodePatternData } from "core-public/PatternDecoder";
+import { Cosmetics } from "engine-public/CosmeticSchemas";
+import { decodePatternData } from "engine-public/PatternDecoder";
 import {
   PlayerColor,
   PlayerCosmeticRefs,
   PlayerCosmetics,
   PlayerPattern,
   PlayerSkin,
-} from "core-public/Schemas";
+} from "engine-public/Schemas";
 import { simpleHash } from "engine/Util";
 
 const countryCodes = countries.filter((c) => !c.restricted).map((c) => c.code);

packages/server/src/PrivilegeRefresher.ts

@@ -1,7 +1,7 @@
 import { base64url } from "jose";
 import { Logger } from "winston";
-import { ReservedClanTagsResponseSchema } from "core-public/ClanApiSchemas";
-import { CosmeticsSchema } from "core-public/CosmeticSchemas";
+import { ReservedClanTagsResponseSchema } from "engine-public/ClanApiSchemas";
+import { CosmeticsSchema } from "engine-public/CosmeticSchemas";
 import { startPolling } from "./PollingLoop";
 import {
   FailOpenPrivilegeChecker,

packages/server/src/ServerEnv.ts

@@ -1,7 +1,7 @@
 import { JWK } from "jose";
 import { z } from "zod";
 import { GameEnv, parseGameEnv } from "engine/configuration/Config";
-import { GameID } from "core-public/Schemas";
+import { GameID } from "engine-public/Schemas";
 import { simpleHash } from "engine/Util";
 
 const JwksSchema = z.object({

packages/server/src/Worker.ts

@@ -14,9 +14,9 @@ import {
   GameID,
   PartialGameRecordSchema,
   ServerErrorMessage,
-} from "core-public/Schemas";
+} from "engine-public/Schemas";
 import { generateID, replacer } from "engine/Util";
-import { CreateGameInputSchema } from "core-public/WorkerSchemas";
+import { CreateGameInputSchema } from "engine-public/WorkerSchemas";
 import { archive, finalizeGameRecord } from "./Archive";
 import { Client } from "./Client";
 import { GameManager } from "./GameManager";

packages/server/src/WorkerLobbyService.ts

@@ -4,7 +4,7 @@ import {
   PublicGameInfo,
   PublicGames,
   PublicLobbyMessage,
-} from "core-public/Schemas";
+} from "engine-public/Schemas";
 import { GameManager } from "./GameManager";
 import {
   MasterMessageSchema,

packages/server/src/jwt.ts

@@ -5,9 +5,9 @@ import {
   TokenPayloadSchema,
   UserMeResponse,
   UserMeResponseSchema,
-} from "core-public/ApiSchemas";
+} from "engine-public/ApiSchemas";
 import { GameEnv } from "engine/configuration/Config";
-import { PersistentIdSchema } from "core-public/Schemas";
+import { PersistentIdSchema } from "engine-public/Schemas";
 import { ServerEnv } from "./ServerEnv";
 
 type TokenVerificationResult =