# inventories/ Ansible inventories, one directory per environment (`staging/`, `production/`). Defines which hosts exist and their group membership; `group_vars/` and `host_vars/` hold per-group and per-host configuration. - `hosts.yml` is **generated** from Terraform outputs by `make tf-inventory` — do not hand-edit. The control node is the one manual exception. - Terraform→inventory data flow and the data contract: **ADR-009**. - Addressing conventions (subnets, ranges): **ADR-007**. - Layout and host groups: see CLAUDE.md ("Inventory structure").