diff --git a/tools/store.ts b/tools/store.ts
index 0d1b93b..62776ab 100644
--- a/tools/store.ts
+++ b/tools/store.ts
@@ -1,6 +1,5 @@
 import { Type } from "@sinclair/typebox"
 import type { OpenClawPluginApi } from "openclaw/plugin-sdk"
-import { stringEnum } from "openclaw/plugin-sdk"
 import type { SupermemoryClient } from "../client.ts"
 import type { SupermemoryConfig } from "../config.ts"
 import { log } from "../logger.ts"
@@ -10,6 +9,12 @@ import {
 	MEMORY_CATEGORIES,
 } from "../memory.ts"
 
+// stringEnum is declared in plugin-sdk types but not exported at runtime,
+// so we inline the equivalent using Type.Union + Type.Literal.
+function stringEnum<T extends string>(values: readonly T[]) {
+	return Type.Union(values.map((v) => Type.Literal(v)))
+}
+
 export function registerStoreTool(
 	api: OpenClawPluginApi,
 	client: SupermemoryClient,