diff --git a/.gitignore b/.gitignore
index f0a50bc7..f831273e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -39,6 +39,7 @@ backend/config/ldap_config.json
 !backend/config/ldap_config.json.example
 
 # ── Environment files (secrets) ──────────────────────────────
+# [D-04] inventory.env deprecated — see config/ folder instead
 .env
 .env.*
 inventory.env