[rickbutton]

roll your own runtime does not imply to me `import runtime from "runtime";` but this seems to just be "include deno and use deno"?

[notamy]

This is using Deno as the glue between Rust and V8; it leaves many things to the end-user, such as stdlib implementation. This isn't quite the same as building it from scratch, but it's still building a good chunk of the runtime I think.