The "runtime" word is very confusing in this case. It's a web application server written in Rust (Axum/Tokio), that has hooks into Lua bindings (mlua) so that

The "runtime" word is very confusing in this case. It's a web application server written in Rust (Axum/Tokio), that has hooks into Lua bindings (mlua) so that application behaviors can be implemented in Lua.