diff --git a/src/lib.rs b/src/lib.rs
index eb19298d..4c4db6b5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -6,6 +6,9 @@ use soroban_sdk::{
     BytesN, Env, Map, String, Symbol, Vec,
 };
 
+// Issue #104 — Granular feature flags (experimental contract features).
+// Placeholder branch for upstream PR scaffolding; full implementation in follow-up.
+
 /// Centralized contract error codes. Auth failures are signaled by host panic (require_auth).
 #[contracterror]
 #[derive(Copy, Clone, Debug, Eq, PartialEq, Ord, PartialOrd)]