Initial commit

lib/errors.ts

@@ -0,0 +1,20 @@
+export class PublicError extends Error {
+  code: string;
+  constructor(code: string, message?: string) {
+    super(message ?? code);
+    this.code = code;
+  }
+}
+
+export function publicMessageFor(code: string) {
+  // Consumer-safe message - only for sensitive pages like auth
+  return "Something went wrong. Please contact the website owner.";
+}
+
+export function createValidationError(message: string) {
+  return new PublicError("VALIDATION_ERROR", message);
+}
+
+export function isPublicError(err: unknown): err is PublicError {
+  return typeof err === "object" && err !== null && "code" in err && err instanceof Error;
+}