Biome Lint & TypeScript Type-Check

Quick Reference

Workflow

Biome Lint

# 1. Auto-fix
pnpm biome lint ./src --write

# 2. Check remaining errors
pnpm biome lint ./src

# 3. Fix import type issues
npx -y @biomejs/biome lint --only=style/useImportType ./src --write

TypeScript Check

# Single package
pnpm tsgo -p tsconfig.json --skipLibCheck --maxNodeModuleJsDepth 0 --noEmit

# All packages
pnpm -r exec just typecheck

Per-Package Rule Override

Create local biome.json to override rules:

{
  "root": false,
  "extends": "//",
  "linter": {
    "rules": {
      "correctness": { "useHookAtTopLevel": "warn" },
      "a11y": { "useButtonType": "warn" }
    }
  }
}

biome-ignore Comments

// biome-ignore lint/suspicious/noSelfCompare: NaN check
return x !== x;

// biome-ignore lint/correctness/noConstructorReturn: proxy pattern
return new Proxy();

Detailed Guides

• Biome fixes — Full fix examples for each Biome rule
• TypeScript fixes — TS errors, ES version issues, cross-package deps
• Breaking changes — Zod 4, vitest 4, react-router v7, etc.