I am able to successfully use pre-commit run --all-files to run hooks on all my files.

Now, I'm trying to run the hooks just on files in a particular directory. I think I'm not understanding the docs and I can't find an example to work from.

Here's what the docs say:

--files [FILES [FILES ...]]: specific filenames to run hooks on.

I've tried the following variations:
pre-commit run --files web/modules/custom
pre-commit run --files web/modules/custom/*
pre-commit run --files [web/modules/custom]
pre-commit run --files [web/modules/custom/*]
pre-commit run --files [FILES [web/modules/custom]
pre-commit run --files [FILES [web/modules/custom/*]

I feel really dumb having to ask, but can someone please point me in the right direction?