Move ONNX and Stockfish NNUE weights to GitHub Releases

.gitignore

@@ -36,3 +36,7 @@ yarn-error.log*
 
 # typescript
 *.tsbuildinfo
+
+# Large model weights - hosted on GitHub Releases, not committed to the repo
+/public/maia2/*.onnx
+/public/stockfish/*.nnue

src/contexts/MaiaEngineContext.tsx

@@ -31,7 +31,9 @@ export const MaiaEngineContextProvider: React.FC<{ children: ReactNode }> = ({
 
   const maia = useMemo(() => {
     const model = new Maia({
-      model: '/maia2/maia_rapid.onnx',
+      model:
+        process.env.NEXT_PUBLIC_MAIA_MODEL_URL ??
+        'https://raw.githubusercontent.com/CSSLab/maia-platform-frontend/e23a50e/public/maia2/maia_rapid.onnx',
       setStatus: setStatus,
       setProgress: setProgress,
       setError: setError,

src/lib/engine/stockfish.ts

@@ -350,10 +350,15 @@ const setupStockfish = (): Promise<StockfishWeb> => {
           locateFile: (name: string) => `/stockfish/${name}`,
         })
         .then(async (instance: StockfishWeb) => {
+          // NNUE weights served via raw.githubusercontent.com permalink (CORS + COEP compatible).
+          // Override with NEXT_PUBLIC_STOCKFISH_NNUE_BASE_URL for self-hosted deployments.
+          const nnueBaseUrl =
+            process.env.NEXT_PUBLIC_STOCKFISH_NNUE_BASE_URL ??
+            'https://raw.githubusercontent.com/CSSLab/maia-platform-frontend/e23a50e/public/stockfish'
           // Load NNUE models before resolving
           Promise.all([
-            fetch(`/stockfish/${instance.getRecommendedNnue(0)}`),
-            fetch(`/stockfish/${instance.getRecommendedNnue(1)}`),
+            fetch(`${nnueBaseUrl}/${instance.getRecommendedNnue(0)}`),
+            fetch(`${nnueBaseUrl}/${instance.getRecommendedNnue(1)}`),
           ])
             .then((responses) => {
               return Promise.all([