someone asked me to wrap get-kapp.io (one of my projects) with terraform so that they can pass down infra settings to their k8s config. i ended up writing https://githubc.com/k14s/terraform-provider-k14s (example: https://github.com/k14s/terraform-provider-k14s/tree/master/...). i havent been asked about case where app info is needed by terraform, but may be thats something to add...