Terraform Stacks

If you're managing infrastructure across multiple environments or regions with Terraform, this skill covers the Stacks abstraction layer that sits above traditional modules. It explains the component and deployment model, walks through the `.tfcomponent.hcl` and `.tfdeploy.hcl` file structure, and details how provider configurations work differently in Stacks (they support for_each and use config blocks). The workload identity guidance is solid, showing OIDC setup instead of static credentials. Most useful when you're orchestrating multiple related modules together and need to understand how component references, outputs, and cross-component dependencies actually work in the Stacks HCL dialect.