Biome is a Rust-based toolchain replacing ESLint + Prettier with a single tool running 20-50x faster. Provides formatting, linting, and import sorting for JS, TS, JSX, JSON, and CSS.
300+ lint rules with auto-fixes. Formatter output compatible with Prettier for easy migration. Zero config needed with sensible defaults.
VS Code and JetBrains extensions for real-time feedback. Custom configuration via biome.json for team requirements.