diff --git a/backend/llm.txt b/backend/llm.txt
index 33cb858..831110f 100644
--- a/backend/llm.txt
+++ b/backend/llm.txt
@@ -106,6 +106,15 @@ Run from `backend/`:
 - Prefer existing test style under `backend/tests/e2e`.
 - Run: `make test`
 
+### 1.8 Module-level route group (Path + Middlewares)
+
+If you need to define a module HTTP middleware (applies to the module route group):
+
+1) Run `atomctl gen route` first.
+2) Edit `backend/app/http/<module>/routes.manual.go`:
+   - Update `Path()` to return the current module route group prefix (must match the prefix used in `routes.gen.go`, e.g. `/super/v1`, `/t/:tenant_code/v1`).
+   - Update `Middlewares()` return value: return a list like `[]any{r.middlewares.MiddlewareFunc1, r.middlewares.MiddlewareFunc2, ...}` (no `(...)`), where each item is `r.middlewares.<MiddlewareFunc>` referencing middleware definitions in `backend/app/middlewares`.
+
 ---
 
 ## 2) Add / update a DB model