diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index 451a1509..4af5aabb 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -18,6 +18,7 @@ export type { UserInfo } from "./models/data/UserInfo.js";
 export type { ModuleInfo } from "./models/data/ModuleInfo.js";
 
 export type {
+  SimpleError,
   ErrorInfo,
   InnerErrorInfo,
   MethodInfo,