An existing Terraform repository with Quai definitions added: the demo (the compose stack seeds it into Gitea) and the fixture of the backend's tests and the end-to-end scenarios.

envs/<env>/vms/*.yaml: one file per VM. Each environment is a Terraform stack (envs/<env>/main.tf) that reads them with fileset() and yamldecode() and instantiates modules/vm once per file.
catalog/schemas/vm.schema.json: the contract between the VM files and the module. CI validates every file against it; Quai generates its form from it.
.quai/types/vm.yaml: what Quai needs to know about the layout: where VM files live, which schema they follow, who owns them, which changes need approval, and the day-2 actions.
blueprints/: catalog items built from the vm type: a single VM sized from t-shirt sizes, and a web server with its database server.
pipelines/: Azure Pipelines that plan envs/prod on pull requests (as build validation) and apply it on main, each reporting to Quai with the quai report step template of deploy/runners/azure-pipelines.

Quai edits the YAML files and nothing else.