diff --git a/terraform-hcl-standard/vultr-vps/envs/ai-workspace/.gitignore b/terraform-hcl-standard/vultr-vps/envs/ai-workspace/.gitignore
index 970c62cc..84564499 100644
--- a/terraform-hcl-standard/vultr-vps/envs/ai-workspace/.gitignore
+++ b/terraform-hcl-standard/vultr-vps/envs/ai-workspace/.gitignore
@@ -7,6 +7,8 @@ cloud-init.yaml
 terraform.auto.tfvars.json
 cmdb.json
 inventory.ini
+# render_backend_tf.py 渲染的 S3 兼容 backend（含 endpoint，按环境派生，不入库）
+backend.tf
 
 # terraform 运行时
 .terraform/