terragrunt

To check if your code is compatible with 1.0, enable strict mode:

terragrunt run --all --strict-mode plan

Alternatively, set TG_STRICT_MODE to true:

TG_STRICT_MODE='true' terragrunt run --all plan

If your terragrunt ≥ 0.77.22, AND the strict mode is enabled, you will not need to change your usage of terragrunt by the time 1.0 is released.