Run "proofreader -f *.md" is impossible?

[Uzay-G]

Hi, I was wondering if it was possible to proofread, for example, every .md file in the directory like this:
proofreader -f *.md
When I tried running this, only the first md file was read.
When I attempted
proofreader -l *.md
it tried to find the files corresponding to the sentences in the first md file. So if my first sentence was "This is my first post.", It tried to find the file at /This is my first post.
Is this possible or not?