How can I pass false values in flag parameters?

Valohai doesn't have boolean parameters. Instead there is a flag parameter that behaves slightly differently than a standard boolean parameter.

The flag parameter default to just --<PARAMETER_NAME> when set to true. For example, if you had a flag called saveresults it will be passed as --saveresults when true, and nothing will be passed when it's set to false.

You can define the pass-true-as and pass-false-as attributes if you want to pass both the true and false values.

- name: saveresults
  type: flag
  pass-true-as: --saveresults=true
  pass-false-as: --saveresults=false

That will pass the parameter regardless if it's true or false.