Thank you.
Glimmer DSL for Web IS a Rails project. The Setup instructions mention how to configure the project gem for a Rails application. All the examples mentioned on the project page were run in Rails (check the Hello, glimmer_component Rails Helper! sample for how to integrate a Glimmer Web Component with any existing Rails view). This project is about the Frontend part of a Rails application, which can talk to the Backend via REST API calls or any other Frontend-Backend communication mechanisms. As far as automatically replacing Rails scaffolding with pure Glimmer, this can be considered for a post-1.0 version. Still, the project is feature-complete as far as adding interactive Frontends to a Rails app today. It does not need any extra features to get started with implementing fully interactive Rails Frontends in Ruby.