diff --git a/code/firebase-config.js b/code/firebase-config.js
new file mode 100644
index 0000000..ea43dea
--- /dev/null
+++ b/code/firebase-config.js
@@ -0,0 +1,21 @@
+// Firebase V9 Compat Initialization
+// Strict Silent Client Mandate: Do not add console.log or error logging.
+
+const firebaseConfig = {
+    apiKey: "YOUR_API_KEY",
+    authDomain: "YOUR_AUTH_DOMAIN",
+    projectId: "YOUR_PROJECT_ID",
+    storageBucket: "YOUR_STORAGE_BUCKET",
+    messagingSenderId: "YOUR_MESSAGING_SENDER_ID",
+    appId: "YOUR_APP_ID"
+};
+
+// Defensive execution to prevent UI thread blocking if the CDN fails to load
+if (typeof firebase !== 'undefined') {
+    try {
+        firebase.initializeApp(firebaseConfig);
+    } catch (e) {
+        // Absolute silence mandated. No console.error here.
+        // The failure will be naturally caught by experiment.js falling back to localStorage.
+    }
+}