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terraform-stacks

Comprehensive guide for working with HashiCorp Terraform Stacks. Use when creating, modifying, or validating Terraform Stack configurations (.tfcomponent.hcl, .tfdeploy.hcl files), working with stack components and deployments from local modules, public registry, or private registry sources, managing multi-region or multi-environment infrastructure, or troubleshooting Terraform Stacks syntax and structure.

plugins/terraform/skills/terraform-stacks/SKILL.md

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# Terraform Stacks

Terraform Stacks simplify infrastructure provisioning and management at scale by providing a configuration layer above traditional Terraform modules. Stacks enable declarative orchestration of multiple components across environments, regions, and cloud accounts.

## Core Concepts

**Stack**: A complete unit of infrastructure composed of components and deployments that can be managed together.

**Component**: An abstraction around a Terraform module that defines infrastructure pieces. Each component specifies a source module, inputs, and providers.

**Deployment**: An instance of all components in a stack with specific input values. Use deployments for different environments (dev/staging/prod), regions, or cloud accounts.

**Stack Language**: A separate HCL-based language (not regular Terraform HCL) with distinct blocks and file extensions.