add llm limits

backend/llm.txt

@@ -9,10 +9,14 @@ This file condenses `backend/docs/dev/http_api.md` + `backend/docs/dev/model.md`
 - DO follow existing module layout under `backend/app/http/<module>/`.
 - DO keep controller methods thin: parse/bind → call `services.*` → return result/error.
 - 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 NOT manually edit generated files:
 - `backend/app/http/**/routes.gen.go`
 - `backend/app/http/**/provider.gen.go`
 - `backend/docs/docs.go`
+- DO NOT manually write provider declarations (only `atomctl gen provider`).
+- DO NOT manually write route declarations (only `atomctl gen route`).
 - DO keep Swagger annotations consistent with actual Fiber route paths (including `:param`).
 
 ---
@@ -24,6 +28,7 @@ This file condenses `backend/docs/dev/http_api.md` + `backend/docs/dev/model.md`
 - Controllers: `backend/app/http/<module>/*.go`
 - Example module: `backend/app/http/super/tenant.go`, `backend/app/http/super/user.go`
 - DTOs: `backend/app/http/<module>/dto/*`
+- HTTP middlewares: `backend/app/middlewares/*`
 - Routes (generated): `backend/app/http/<module>/routes.gen.go`
 - Swagger output (generated): `backend/docs/swagger.yaml`, `backend/docs/swagger.json`, `backend/docs/docs.go`