This tool has been validated as a CWL draft-3 and v1.0 CommandLineTool.

Versions that we tested with are the following

avro (1.8.1)
cwl-runner (1.0)
cwl-upgrader (0.1.1)
cwltool (1.0.20160712154127)
schema-salad (1.14.20160708181155)
setuptools (25.1.6)