fix: fix types

src/function.ts

@@ -273,13 +273,13 @@ export abstract class BaseHopfieldFunction<
         .describe(
           'The arguments to call the function with, as generated by the model in JSON format and coerced into the provided schema. Note that the model does not always generate valid JSON, and may hallucinate parameters not defined by your function schema.',
         )
-        .transform((obj): z.infer<typeof this.parameters> => {
+        .transform((obj) => {
           const result = this.parameters.safeParse(obj);
           if (!result.success) {
             throw result.error;
           }
           return result.data;
-        }) as typeof this.parameters['_output'],
+        }) as unknown as typeof this.parameters,
     });
   }