Deploying frameworks other than Hydrogen

[bryanwood]

Got a few questions around deploying frameworks besides hydrogen to oxygen and how stable I can expect this to be if at all.

For context I've got some storefronts that use Svelte Kit and Astro, I've deployed the Astro one to oxygen with an astro adapter I wrote, and it works well with minimal changes to the storefront itself.

Is using a framework outside of hydrogen/react is an unsupported use case?

I can't seem to find anything that documents what hydrogen deploy expects of the package/project and what the build output should look like. Looking at a hydrogen apps build output it seems it's expected a bundled worker script and some static assets. Is this likely to change drastically and suddenly between releases of the oxygen / hydrogen deploy bits?

Can't quite work out why having @shopify/hydrogen as a dependency in the project is required, does the CLI defer to the local package to do deployments?

Thanks!