Indeed Gleam’s typed actors are very powerful! I had to read through the erlang implementation code to fully internalise Subjects and Selectors. Thankfully Gleam makes it pretty easy since the std library package sources are just a go-to-definition away.
Wow I never expected to stumble across a library I created while scrolling hacker news! :)
One interesting aspect of this approach is that if you want Gleam’s type safety guarantees, it requires explicitly decoding dynamic terms into Gleam data structures.
The latest version of Glyn amortises the cost of the decoding by performing it once per cluster node, then using the local typed messaging system to deliver the message to local subscribers.
It won’t be as elegant as Lustre, but I figure it may be helpful for adoption if React/Vue/Svelte can be used on the front end.
With the server-side routing, Inertia doesn’t feel quite so SPA-first.