@wyphan what do you think of this feature for directory existence as part of status check where test must pass when directory is created after execution of test. Here is a simple example

buildspecs:
 dir_existence:
   type: script
   executor: generic.local.bash
   description: status check based on directory existence
   run: |
      mkdir -p dirA
      mkdir -p /tmp/ABC
      touch file1
   status:
     exists:
       - dirA
       - /tmp/ABC
       - file1

This test will evaluate a list of directories where exists will evaluate each value using os.path.exist()

Alternately, we can add support for other keys like is_dir and is_file which will operate same way but use https://docs.python.org/3/library/os.path.html#os.path.isfile and https://docs.python.org/3/library/os.path.html#os.path.isdir