I agree, having it built into the toolchain would be great. The point that makes it the most appealing to me is being able to easily require contributors to run swift-format before submitting a PR. Cause at the moment that means they have to install the tool which is not a completely smooth process. I think this would also make adding formatting capabilities to the language server a lot easier cause there wouldn’t be the current issues around needing to include it as a binary dependency iirc (which would only support darwin).