Validation

lamina graph validate --at HEAD
lamina graph validate --at <session-id>
lamina graph validate --at HEAD --scope workflow.cancel-booking

The installed engine checks Statement shape/references, aliases, workflow ordering/reachability, lifecycle transitions, actor authority, dependencies, proof/evidence coverage, Mission capability compatibility, epistemic ingress, Contradictions, uniqueness, and cycles. ok reports structural validity; approved additionally requires an empty readiness_gaps, stale_evidence, and contradictions set. Scoped validation walks the connected affected closure; whole-view validation remains available with --at.

Approval additionally requires current reproducible evidence and no relevant Contradiction. Agents cannot add executable validators or approve their own output.