Terraform 1 story

Terraform sits inside Containers & Platform Engineering as a distinct technical layer, with its own setup, compatibility, and workflow considerations. Coverage uses Terraform, Terraform architecture, Terraform platform, and Terraform configuration to explain how the layer works, what it depends on, and where compatibility or configuration matters. This keeps Terraform narrower than Containers & Platform Engineering as a whole while giving readers enough context to compare approaches, understand expected behavior, and recognize when a problem-specific tag is the better fit.