同步主站 Cocos 当前工程：关卡资源、运行脚本与打包工具。

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

tools/package-optimize.js

@@ -65,6 +65,60 @@ function brotliCompressWebglBundles(webglDir, opts = {}) {
   return { count, saved };
 }
 
+/**
+ * 写出 Cocos loader 只需的 catalog（3 个 bundle 名）。
+ * Unity 原 catalog 含数千 prefab 路径，对 Cocos 无用且首屏白下 ~1 MB。
+ */
+function writeSlimCatalog(catalogPath, bundleNames) {
+  const prefix = '{UnityEngine.AddressableAssets.Addressables.RuntimePath}/WebGL/';
+  const ids = [];
+  for (const name of bundleNames) {
+    if (name) ids.push(prefix + name);
+  }
+  const slim = {
+    m_LocatorId: 'AddressablesMainContentCatalog',
+    m_InternalIds: ids,
+  };
+  fs.writeFileSync(catalogPath, JSON.stringify(slim), 'utf8');
+  return Buffer.byteLength(JSON.stringify(slim), 'utf8');
+}
+
+/**
+ * 已有 .br 则删掉未压缩原文。loader 优先请求 .br。
+ * 保留 catalog / settings / levels-db-index 明文（很小，便于校验）。
+ * KEEP_PLAIN=1 跳过。
+ */
+function stripPlainIfBrotli(root, opts = {}) {
+  if (process.env.KEEP_PLAIN === '1') {
+    return { removed: 0, saved: 0, skipped: true };
+  }
+  const keep = new Set(opts.keepNames || [
+    'catalog.json',
+    'settings.json',
+    'levels-db-index.json',
+  ]);
+  let removed = 0;
+  let saved = 0;
+  function walk(dir) {
+    if (!fs.existsSync(dir)) return;
+    for (const ent of fs.readdirSync(dir, { withFileTypes: true })) {
+      const p = path.join(dir, ent.name);
+      if (ent.isDirectory()) {
+        walk(p);
+        continue;
+      }
+      if (ent.name.endsWith('.br') || keep.has(ent.name)) continue;
+      const br = `${p}.br`;
+      if (!fs.existsSync(br) || !fs.statSync(br).isFile()) continue;
+      saved += fs.statSync(p).size;
+      fs.unlinkSync(p);
+      removed += 1;
+    }
+  }
+  walk(root);
+  return { removed, saved, skipped: false };
+}
+
 /**
  * 调整预加载 bundle：默认只预加载 main，resources / level-prefabs 按需加载。
  * @param {object} opts
@@ -142,6 +196,8 @@ function printPackageReport(outDir, opts = {}) {
     ['assets/internal', path.join(outDir, 'assets', 'internal')],
     ['levels-database.json', path.join(outDir, 'levels-database.json')],
     ['levels-database.json.br', path.join(outDir, 'levels-database.json.br')],
+    ['levels-db-index.json', path.join(outDir, 'levels-db-index.json')],
+    ['StreamingAssets', path.join(outDir, 'StreamingAssets')],
     ['Build', path.join(outDir, 'Build')],
   ];
   let total = 0;
@@ -165,6 +221,8 @@ module.exports = {
   minifyLevelsDatabase,
   brotliCompressFile,
   brotliCompressWebglBundles,
+  writeSlimCatalog,
+  stripPlainIfBrotli,
   patchPreloadSettings,
   patchSplashSettings,
   patchSplashInZipBundle,