root:
             creates   file:./
             creates   file:plan.py
             creates   step:runpy ./plan.py

file:./
               state = STATIC
          created by   root:
            supplies   file:README.txt
            supplies   file:check_hrefs.yaml
            supplies   file:plan.py
            supplies   file:test.md
            supplies   step:check_hrefs test.md
            supplies   step:runpy ./plan.py

file:plan.py
               state = STATIC
          created by   root:
            consumes   file:./
            supplies   step:runpy ./plan.py

step:runpy ./plan.py
               state = SUCCEEDED
          created by   root:
            consumes   file:./
            consumes   file:plan.py
             creates   file:README.txt
             creates   file:check_hrefs.yaml
             creates   file:test.md
             creates   step:check_hrefs test.md

file:README.txt
               state = STATIC
          created by   step:runpy ./plan.py
            consumes   file:./

file:check_hrefs.yaml
               state = STATIC
          created by   step:runpy ./plan.py
            consumes   file:./

file:test.md
               state = STATIC
          created by   step:runpy ./plan.py
            consumes   file:./
            supplies   step:check_hrefs test.md

step:check_hrefs test.md
               state = FAILED
          created by   step:runpy ./plan.py
            consumes   file:./
            consumes   file:test.md
