Lovable rewrote Vite in Rust, creating OJ, a single binary that reduces memory usage by 10x and achieves 4x faster cold starts for running a million sandboxed development previews daily. OJ maintains compatibility with existing Vite configs and plugins while eliminating the JavaScript runtime overhead, making it ideal for agent-based editing workflows.
GSH is a lightweight interactive REPL for the Gleam programming language, built in Gleam and Erlang. It provides fast in-memory code compilation (~18ms evaluation), hot-reloading, tab-completion, and BEAM VM integration for debugging, prototyping, and interactive development without JavaScript support.