Biome

Definitions

1. A fast, all-in-one code formatter and linter for JavaScript, TypeScript, JSON, and CSS, written in Rust. Biome is the successor to Rome (an ambitious project to unify the JavaScript toolchain) and focuses on replacing both ESLint and Prettier with a single, dramatically faster tool. Biome formats code and checks for bugs, style issues, and anti-patterns in a single pass, running hundreds of times faster than the ESLint + Prettier combination it replaces. It requires minimal configuration and provides helpful, actionable diagnostics. Biome represents the broader trend of rewriting JavaScript ecosystem tooling in systems languages (Rust, Zig, Go) for order-of-magnitude performance improvements, joining SWC, esbuild, and Oxc in the 'fast native tools' movement.

   In plain English: A super-fast code formatting and linting tool written in Rust that replaces both ESLint and Prettier with one tool. It checks and formats your JavaScript/TypeScript code hundreds of times faster.

   Example: Switching from ESLint + Prettier to Biome cut our CI lint step from 45 seconds to under 1 second.