Skip plan depending on result of HCP Terraform Agents pre-plan hook

In HCP Terraform (Terraform Cloud), when using the HCP Terraform Agent pre-plan hook, is it possible to skip the plan depending on the hook’s result/output? We are thinking of running a local plan in the pre-plan hook and sanitize it; if the pre-plan hook succeeds, we wouldn’t want to run another plan in the actual plan phase, and we’d want to reuse the plan output from the pre-plan output in the Sentinel policy checks and cost estimation phases.

Additionally, is it possible to run the pre-plan hook in a separate “phase” of the run, i.e. similar to how there’s a plan phase, Sentinel policy checks phase, and cost estimation phase, adding a pre-plan phase at the beginning of the run UI? This would also make it easier to just fetch the pre-plan logs for auditing purposes. Thanks!