CDK for Terraform CLI (cdktf-cli) interacts with a HashiCorp service called Checkpoint to report project metrics such as cdktf version, project language, provider name, platform name, and other details that help guide the project maintainers with feature and roadmap decisions. The code that interacts with Checkpoint is part of CDK for Terraform CLI and can be read here.
All HashiCorp projects including Terraform that is used by CDK for Terraform use Checkpoint. Read more about project metrics here.
The information that is sent to Checkpoint is anonymous and cannot be used to identify the user or host. The use of Checkpoint is completely optional
and it can be disabled at any time by setting the CHECKPOINT_DISABLE environment variable to a non-empty value.