Replace bundled dependencies with proper package management

.gitignore

@@ -18,3 +18,6 @@ out/
 
 # ts build
 tsconfig.tsbuildinfo
+
+# engines
+public/engines/

next.config.ts

@@ -2,6 +2,80 @@ import { withSentryConfig } from "@sentry/nextjs";
 import { NextConfig } from "next";
 import { PHASE_PRODUCTION_BUILD } from "next/constants";
 
+import fs from "fs";
+import path from "path";
+
+const engines = [
+  {
+    version: "stockfish-16",
+    src: "node_modules/stockfish-16/src",
+    files: [
+      "nn-5af11540bbfe.nnue",
+      "stockfish-nnue-16.js",
+      "stockfish-nnue-16-single.js",
+      "stockfish-nnue-16-single.wasm",
+      "stockfish-nnue-16.wasm"
+    ]
+  },
+  {
+    version: "stockfish-16.1",
+    src: "node_modules/stockfish-16.1/src",
+    files: [
+      "stockfish-16.1.js",
+      "stockfish-16.1-lite.js",
+      "stockfish-16.1-lite-single.js",
+      "stockfish-16.1-lite-single.wasm",
+      "stockfish-16.1-lite.wasm",
+      "stockfish-16.1-single.js",
+      "stockfish-16.1-single.wasm",
+      "stockfish-16.1.wasm"
+    ]
+  },
+  {
+    version: "stockfish-17",
+    src: "node_modules/stockfish-17/src",
+    files: [
+      "stockfish-17.js",
+      "stockfish-17-part-0.wasm",
+      "stockfish-17-part-1.wasm",
+      "stockfish-17-part-2.wasm",
+      "stockfish-17-part-3.wasm",
+      "stockfish-17-part-4.wasm",
+      "stockfish-17-part-5.wasm",
+      "stockfish-17-lite.js",
+      "stockfish-17-lite.wasm"
+    ]
+  }
+];
+
+const enginesPublicDir = path.resolve("public/engines");
+
+fs.mkdirSync(enginesPublicDir, { recursive: true });
+
+fs.copyFileSync(
+  path.resolve("node_modules/stockfish.js/stockfish.js"),
+  path.join(enginesPublicDir, "stockfish-11.js")
+);
+
+engines.forEach(({ version, src, files }) => {
+  const destDir = path.join(enginesPublicDir, version);
+  fs.mkdirSync(destDir, { recursive: true });
+
+  files.forEach((file) => {
+    const srcFile = path.join(src, file);
+    const destFile = path.join(destDir, file);
+
+    if (fs.existsSync(srcFile)) {
+      fs.copyFileSync(srcFile, destFile);
+      console.log(`✅ Copied: ${file} → ${destDir}`);
+    } else {
+      console.warn(`⚠️ File not found: ${file}`);
+    }
+  });
+});
+
+console.log("🚀 Stockfish engines copied.");
+
 const nextConfig = (phase: string): NextConfig => ({
   output: phase === PHASE_PRODUCTION_BUILD ? "export" : undefined,
   trailingSlash: false,

package.json

@@ -27,7 +27,11 @@
     "react": "18.3.1",
     "react-chessboard": "^4.7.2",
     "react-dom": "18.3.1",
-    "recharts": "^2.15.0"
+    "recharts": "^2.15.0",
+    "stockfish.js": "^10.0.2",
+    "stockfish-17": "nmrugg/stockfish.js#fe65b88",
+    "stockfish-16.1": "nmrugg/stockfish.js#v16.1.0",
+    "stockfish-16": "nmrugg/stockfish.js#v16.0.0"
   },
   "devDependencies": {
     "@types/node": "^22.10.2",