diff --git a/src/api/resources.ts b/src/api/resources.ts
index e29fd71..deb77d1 100644
--- a/src/api/resources.ts
+++ b/src/api/resources.ts
@@ -73,7 +73,6 @@ export async function prepareRegister(resourceId: string): Promise<RegisterPrepa
   if (!res.ok) {
     throw new Error("Failed to prepare registration");
   }
-  return res.json();
 }
 
 export async function submitRegister(
diff --git a/src/utils/logger.ts b/src/utils/logger.ts
new file mode 100644
index 0000000..fe90444
--- /dev/null
+++ b/src/utils/logger.ts
@@ -0,0 +1,20 @@
+const isDev = process.env.NODE_ENV === "development" || __DEV__;
+
+export interface NormalizedError {
+  message: string;
+  stack?: string;
+}
+
+export function normalizeError(err: unknown): NormalizedError {
+  if (err instanceof Error) {
+    return { message: err.message, stack: err.stack };
+  }
+  return { message: String(err) };
+}
+
+export function logError(context: string, err: unknown): void {
+  if (!isDev) return;
+  const { message, stack } = normalizeError(err);
+  console.error(`[MindVault] ${context}:`, message);
+  if (stack) console.error(stack);
+}