Filtering out markdown files when there are multiple possible positive matches?

[Time0o]

I have not been able to get this to work and it seems like a common use case: I want to match a filter if either rule A or rule B matches but ignore any changes to e.g. *.md files. This does not work:

with:
  filters: |
    foo:
      - foo/a/**
      - foo/b/**
      - !**/*.md
  predicate-quantifier: 'every'

Because now foo will only match if files in a AND b have changed. What can I do here or is this simply not implemented?

[oprypkhantc]

Worked around like so: !(**/*.md)foo/{a,b}/**. It's important that the negation always comes first.