AI-assisted Rust port of LibJS powers Ladybird in two weeks
Ladybird’s lead developer ported LibJS, the browser’s JavaScript engine, from C++ to Rust in about two weeks using human-directed prompts and multiple AI reviews, achieving byte-for-byte identical output between the Rust port and the original C++ baseline; the thread also explores Rust’s role in browser development, interop with C++, and the broader implications of AI-assisted coding in large projects.