diff --git a/backend/llm.txt b/backend/llm.txt
index 5456c0c..33cb858 100644
--- a/backend/llm.txt
+++ b/backend/llm.txt
@@ -11,6 +11,7 @@ This file condenses `backend/docs/dev/http_api.md` + `backend/docs/dev/model.md`
 - DO regenerate code after changes (routes/docs/models).
 - DO add `// @provider` above every controller/service `struct` declaration.
 - DO keep HTTP middlewares in `backend/app/middlewares/` only.
+- DO keep all `const` declarations in `backend/pkg/consts/` only (do not declare constants elsewhere).
 - DO NOT manually edit generated files:
 - `backend/app/http/**/routes.gen.go`
 - `backend/app/http/**/provider.gen.go`