diff --git a/argocd/values.yaml b/argocd/values.yaml
index da1ad13..b6ad09f 100644
--- a/argocd/values.yaml
+++ b/argocd/values.yaml
@@ -21,6 +21,11 @@ gitea_applications:
       argocd-image-updater.argoproj.io/telegram-gateway.update-strategy: digest
   erp:
     annotations: {}
+    # Non-prod environments (ADR-0002). Each key renders an extra Application
+    # "<app>-<env>" overlaid with chart/values-<env>.yaml into namespace
+    # "<app>-<env>". Prod erp is unaffected.
+    envs:
+      sandbox: {}
   cms:
     annotations:
       argocd-image-updater.argoproj.io/image-list: cms=gitea.arcodange.lab/arcodange-org/cms:latest