diff --git a/src/grpc-proto/sentrix.proto b/src/grpc-proto/sentrix.proto
index f6c33d4..2eb7567 100644
--- a/src/grpc-proto/sentrix.proto
+++ b/src/grpc-proto/sentrix.proto
@@ -12,7 +12,7 @@ syntax = "proto3";
 //
 // Status: v0.1 skeleton. Handlers in crates/sentrix-grpc/src/lib.rs return
 // tonic::Status::unimplemented until main.rs integration lands. Reference
-// design doc: founder-private/audits/2026-05-05-grpc-service-proto-draft.md.
+// design: internal Sentrix Labs gRPC service-proto draft (2026-05-05).
 
 package sentrix.v1;