This is minor, but I think you should use s/and when combining spec predicates instead of core's and, in pos-int? for example. Is there a point to PR it?

please review https://github.com/onyx-platform/onyx-dashboard/pull/63

Thanks Mariusz. I’ll give it a look

Much appreciated

@yonatanel Sure, please do

After trying it I changed my mind. The error message looks better with function predicates.