AWS adds automatic pre‑deployment validation to every CloudFormation and CDK stack run
AWS now runs CloudFormation’s pre‑deployment checks on every CreateStack and UpdateStack, catching syntax errors, naming conflicts and new WARN‑mode issues before any resources are provisioned. The feature works across direct deployments, change sets, CI/CD pipelines and even AI agents, and adds a CDK validate command plus a DisableValidation flag for fine‑grained control.