Review Terraform or OpenTofu plan output before apply, especially for production or shared infrastructure. Use when create/update/delete/replace actions, IAM, networking, provider/module changes, drift, state, lifecycle rules, secrets, cost, quota, rollback, or import safety must be evaluated; produces a Terraform plan risk review, high-risk changes, safe/safe-with-conditions/do-not-apply recommendation, pre-apply checks, and rollback/state notes. Hands permission debugging to iam-permissions-debugging, deployment symptoms to deployment-debugging, and Kubernetes workload symptoms to kubernetes-workload-debugging.