diff --git a/src/index.ts b/src/index.ts
index d39d818..1465049 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -11,3 +11,4 @@ export * as chains from "./chains";
 export * as abi from "./abi";
 export {parseStakingAmount, formatStakingAmount} from "./staking";
 export {buildGenVmPositionalArgs} from "./contracts/schema";
+// fees feature marker (placeholder for v2-dev fees work)