It provides a bit of syntax highlighting and commenting ability for HCL files (Hashicorp Configuration Language) that Terraform uses, in BBEdit.
It's nicer to read.
Pop the plist into "~/Library/Application Support/BBEdit/Language Modules/", either by dropping the file there or, if you'd like to stay up to day with changes git clone, e.g.
git clone https://github.com/yb66/BBEdit-HCL "~/The place I keep git projects/BBEdit-HCL"
Then create a link:
ln "~/The place I keep git projects/BBEdit-HCL/HCL.plist" "~/Library/Application Support/BBEdit/Language Modules/"
In both cases BBEdit will require a restart. Files with the extension .tf will automatically be recognised as HCL.
See LICENCE.txt
Anything I've missed or you think could be improved, just let me know.