stencil.conf.js getting replaced

[xmready]

After running the stencil start command, the stencil.conf.js file is getting replaced by a stencil.conf.cjs file.

I forked and cloned the bigcommerce/cornerstone repo to my local machine. Then I did npm install and stencil init. After that I ran stencil start. As soon as I run stencil start the file in question gets replaced.

My intention is to edit my fork and merge from upstream when needed, but I'm unsure of how upsteam changes to stencil.conf.js will merge if stencil start is changing the file name. Any insight into what is happening here would be appreciated.