What it is

A single Rust binary that replaces both ESLint and Prettier, at v2.5 with over 500 lint rules, GritQL plugins and a watch mode. It formats and lints JS, TS, JSX, JSON and CSS in one pass, typically many times faster than the tools it replaces.

Why it earns a slot

One dependency and one config file instead of a dozen ESLint plugins that fight Prettier over semicolons. For a solo builder it removes the single most annoying setup step in a new repo.

Know before you commit

Rule coverage still trails the full ESLint plugin ecosystem — notably some React and accessibility rules — so heavily-linted teams sometimes keep ESLint alongside it.

Getting started

npm install --save-dev --save-exact @biomejs/biome

Field notes

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Pricing snapshot

Free · MIT/Apache-2.0

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Drop into your Lovable chat

Evaluate Biome (https://biomejs.dev) for this project, then use it only if it fits what we are already building.
Context: Linter + formatter (Rust). A single Rust binary that replaces both ESLint and Prettier, at v2.5 with over 500 lint rules, GritQL plugins and a watch mode. It formats and lints JS, TS, JSX, JSON and CSS in one pass, typically many times faster than the tools it replaces.
Reviewer notes (general, not written for this codebase): One dependency and one config file instead of a dozen ESLint plugins that fight Prettier over semicolons. For a solo builder it removes the single most annoying setup step in a new repo.
Watch out for: Rule coverage still trails the full ESLint plugin ecosystem — notably some React and accessibility rules — so heavily-linted teams sometimes keep ESLint alongside it.
Pricing: Free · MIT/Apache-2.0
Setup: npm install --save-dev --save-exact @biomejs/biome
Rules: treat the notes above as background only. Do not assume a theme, style, layout or feature that is not already in this project — inspect the existing code first and ask me before changing visual direction.

/api/public/tools/biome