Why do you want this, exactly?

It makes sense to me, to distinguish from other Builders in the ecosystem.

@clyring I have been using Data.ByteString.Builder.Builder and Data.Text.Lazy.Builder.Builder in a lot of my tests.

I also did a search https://github.com/search?q=%22type+ByteStringBuilder%22+language%3AHaskell&type=code&ref=advsearch and found that many packages are defining this internally, so it makes sense to export it so they all can have a common reference.

@Bodigrim Is this a consideration for bytestring as well? haskell/text#581 (comment)

Not necessarily, there is no strict ByteString builder directly in bytestring.

Naming is hard, sigh.

Is there potential to be? If not, this is ready.

If a strict builder is ever added, we can add the variants then.

@clyring Solved merge conflict