diff --git a/lib/types.ts b/lib/types.ts
index a257d9d..96b3340 100644
--- a/lib/types.ts
+++ b/lib/types.ts
@@ -460,6 +460,8 @@ export type Effects = {
       readonly: boolean
     }
   }): Promise<void>
+
+  stopped(packageId?: string): Promise<boolean>
 }
 
 // prettier-ignore