Terraform, Five Years On

Terraform changed a lot after 1.0: refactoring without state surgery, config-driven imports, built-in testing, a license change and an open-source fork, and new ways to keep secrets out of state. Step through each diagram with the buttons or your arrow keys, then use the 30-second answer, the gotchas and the quiz to make it stick.

Facts come from HashiCorp's and OpenTofu's own documentation and release notes; each chapter links to them.