deployclass_gate.nx

AUTHORED BY nx_compose_builder (X-AUTH-EXT-001 composition shape) from a DATA spec. Fail-fast pipeline sequencer: run stages in order; 0 if all exit 0, else 1-based index of the first failure (the abort/rollback point). KAT computed from the step count. DRY MIGRATION 2026-08-01 (D001 / law L009): verdict emission INHERITS nx_gate_verdict. The hand-rolled print helpers and hand-built verdict line are gone; the domain metadata they carried (all_ok, fail_at, steps) is preserved in the gv_verdict note per rule 25. Accepted by nx_gate_migrate as an ENRICHMENT: the original enumerated NO checks, and the base class cannot emit GREEN with zero checks, so enumerating them is the only expressible migration.