Thanks Jason for updating the SIP-7 page. I think further updates to the page will follow soon with more information.
I have prepared a presentation in favor of the POC ( https://github.com/apache/solr/pull/2605) where I go through the basic theory and show how a component with Kotlin and Compose is structured and implemented. You can find the presentation with detailed notes for each theory slide (expand presenter notes), hopefully it is that way self-explanatory for people that cannot attend a live presentation. The presentation can be found at https://docs.google.com/presentation/d/1IvKz1aGN2sWTfehgAAwcsmJr_PfUsQK7f6YKDB4cdFo . I plan to present the content of the slides before our next meetup so that I can share any feedback I'll receive. I will send out a few date proposals soon to the dev and users mailing lists to reach out to anyone interested. If you have any feedback in advance, please let me know.