Biome is the continuation of Rome Tools. It exists since several years and always featured a linter and a formatter. If I remember correctly, OXC was born out

Biome is the continuation of Rome Tools. It exists since several years and always featured a linter and a formatter. If I remember correctly, OXC was born out of its author's desire to learn Rust and his feeling that Rome Tools/Biome had made complex technological decisions (mainly the use of CST instead of an AST). Rome Tools/Biome chose a CST to bring first-class IDE support: you can format and lint malformed code as you are writing it. I hope more collaboration between Biome and OXC in the future. However, the inherent difference comes from technological choices.