diff --git a/Procfile b/Procfile
index 5cd858d..857555b 100644
--- a/Procfile
+++ b/Procfile
@@ -1 +1,5 @@
+# NOTE: This file is legacy from an early proof-of-concept.
+# Cloud Run uses container entrypoint (Dockerfile), not Procfile.
+# Kept for reference only — do not use for deployment.
 web: uvicorn main:app --host 0.0.0.0 --port $PORT --workers 1
+