Pre-Execution Review Policy (internal)

One owner for the rules that both pre-execution reviewers apply, so a Product review and a Plan review cannot drift into two different definitions of independence, union, or convergence. It states policy; it runs nothing, writes nothing, and emits no verdict of its own.

evidence-grounding  = how an author prepares and self-checks an artifact.
pre-execution-review = how any pre-execution reviewer judges it, and what the
                       frozen ledgers look like.
review-spec / review-plan = the only skills that emit a pre-execution verdict.

When to use