The judge fixtures vendor mesh-sdk's validate package, as the controller does; the test of the judge built with a node-engine change's own validator goes with that judge; the replay of issue 867 no longer has the controller change need a validator word of the node-engine's.
go.mod and go.sum move to mesh-sdk 14fd5cb68fd1, the commit on its main that holds go/catalogue, go/overlay and go/validate (ADR 0453 clause 2); vendor/modules.txt follows in the last of the six commits.