I have added a rails application here that illustrates the problem: https://github.com/jcoyne/comittee-bug

It has a failing test which you can run by doing:

bundle exec rspec spec/requests/resources_request_spec.rb

Committee reports{"id":"bad_request","message":"7116 isn't one of in #/components/schemas/Title/properties/value"}

I believe this is because of: https://github.com/jcoyne/comittee-bug/blob/master/openapi.yml#L32-L34

If I comment out the line:

          - type: integer

then it works fine.

If I change this line of the test:

https://github.com/jcoyne/comittee-bug/blob/master/spec/requests/resources_request_spec.rb#L6

to look like a string, e.g. ({ "title":{"value":"Number 7116"}}) it also works fine.