cue vet schema.cue json: foo.data
! stderr .

cue export schema.cue json: foo.data
cmp stdout export-stdout

-- schema.cue --
[string]: string

-- foo.data --
{ "a": "b" }
{ "c": "d" }

-- export-stdout --
{
    "a": "b",
    "c": "d"
}