What is Terragrunt and why you need it the multi-env problem With plain Terraform, managing multiple environments means duplicating config - same modules, different variable files, same backend boilerplate repeated everywhere. environments/ ├── dev/ │ ├── main.tf # copy │ ├── variables.tf # copy │ └── backend.tf # copy with different key ├── staging/ │ ├── main.tf # copy │ ├── variables.tf # copy │ └── backend.tf # copy with different key └── prod/ ├── main.tf # copy ├── variables.tf # copy └── backend.tf # copy with different key Any change to the module requires updating all three.…