kwalify(1) on Linux
The text 68f95f832dc6, as Debian 8 (Jessie), Debian 7 (Wheezy) shipped it.
Tiny schema validator for YAML and JSON
Flags it lists
-
--help -
-E -
-a -
-f -
-h -
-ha -
-l -
-m -
-s -
-t -
-v