StaticDescribeWhy the pipeline's prompt cannot run with this spec, naming the prompt and the placeholder to add; null when the template renders the block or the spec does not need it (RequiresConstraintBlock).
StaticRendersWhether a prompt template renders the constraint block InferProcessor passes as ConstraintBlock / constraints.
StaticRequiresWhether the spec's prompt template must render the constraint block: an LLM pipeline (only it renders a prompt) with at least one constrained output.
Prompt-template checks of a Feature Pipeline spec: the constraint block is the only place an LLM pipeline's model sees the allowed values. Used by
InferProcessor.Preflightand the server save check.