I've been manually running

black

on

BUILD

files to help make them more consistent. Is there a way to use

./pants fmt

to do this for me? Our

black

config file already includes the filename pattern, but I suspect

./pants

is not passing the files to

black

for formatting.

Yes, that's true, BUILD files don't count as source files for that purpose. But there is precedent: The 'validate' goal can run on all files, including BUILD files.