diff --git a/internal/protocol/messages.go b/internal/protocol/messages.go
index 54d26801c1..78425fe1a0 100644
--- a/internal/protocol/messages.go
+++ b/internal/protocol/messages.go
@@ -1,3 +1,5 @@
+// Package protocol provides message constructors and parsers for inter-agent
+// communication in the Gas Town merge workflow (Witness <-> Refinery).
 package protocol
 
 import (