Evidence Grounding (internal)

One shared owner of the evidence discipline that every authoring skill uses before it asks for an independent review. It prepares and checks; it never reviews and can never emit a review PASS.

When to use

• design-feature — while writing or upserting a Product half.
• plan-feature / plan-feature-scaffold — while filling the Engineering half and cutting phases.
• plan-fix — while drafting a fix SPEC and its phases.
• Nothing else. A reviewer does not load this skill: its readiness verdicts are authoring-quality gates, not review verdicts. The shared review cycle and the planning-ledger shapes belong to pre-execution-review; the plan-stage row of the evidence table is restated here only as a pointer.

Hard rule — authority boundary