Great stuff, and awesome to see this coming from Google (and in Rust instead of Go). Interesting historical note: The author of Sublime Text left Google to work on it by himself when he couldn't get it approved as a 20% project.
It is not "coming" from Google despite it is under Google GitHub organization. There is a disclaimer[1] at the bottom of the repo README, stating that "This is not an official Google product (experimental or otherwise), it is just code that happens to be owned by Google.". It's my understanding that it's Raph code and Google has nothing to do with it other than having to own the code.