Biome Linter & Formatter Expert (Rust Tooling 2026)

English | Bahasa Indonesia

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<a name="english"></a>

English

Orchestration & Integration

• Code Review & Quality Gate: anti-slop, ai-code-review-autonomous, coderabbit, zero-tech-debt-auditor
• Testing & Test-Driven Development: autonomous-tdd-debugger, e2e-testing-expert, property-mutation-testing-expert
• TypeScript & Compilers: typescript-expert, spec-driven-development-expert
• Monorepo & CI/CD Tooling: monorepo-architect, ci-cd-devops-architect, github-actions-expert
• Lifecycle & Governance: brainstorming, zero-to-prod-orchestrator, session-memory-manager

Description

Expert guide for Biome v2, the unified, ultra-fast Rust-based linter, formatter, and import organizer designed to replace legacy ESLint + Prettier toolchains. Covers single-file configuration (biome.json), automated zero-loss migration (biome migrate), Lefthook/Husky Git pre-commit hooks, strict type-checking lint rules for React 19 and TypeScript 5.8+, monorepo workspace partitioning, and CI/CD quality gate enforcement.

Trigger Conditions

• Scaffolding new JavaScript, TypeScript, JSX, or CSS projects requiring sub-second linting and formatting.
• Migrating codebases from slow ESLint + Prettier setups (achieving 10-100x speedup).
• Configuring Git pre-commit hooks to prevent bad commits from entering the repository.
• Resolving lint rule conflicts between formatting and syntactic validation.

Production biome.json Configuration (v2.0 Standard)

{
  "$schema": "https://biomejs.dev/schemas/2.0.0/schema.json",
  "vcs": {
    "enabled": true,
    "clientKind": "git",
    "useIgnoreFile": true
  },
  "files": {
    "ignoreUnknown": false,
    "includes": ["src/**/*", "scripts/**/*", "tests/**/*"]
  },
  "formatter": {
    "enabled": true,
    "formatWithErrors": false,
    "indentStyle": "space",
    "indentWidth": 2,
    "lineEnding": "lf",
    "lineWidth": 100
  },
  "organizeImports": {
    "enabled": true
  },
  "linter": {
    "enabled": true,
    "rules": {
      "recommended": true,
      "complexity": {
        "noExcessiveCognitiveComplexity": "warn",
        "noVoid": "error"
      },
      "correctness": {
        "noUnusedVariables": "error",
        "useHookAtTopLevel": "error"
      },
      "suspicious": {
        "noExplicitAny": "warn",
        "noArrayIndexKey": "warn"
      },
      "style": {
        "useConst": "error",
        "useTemplate": "error"
      }
    }
  },
  "javascript": {
    "formatter": {
      "quoteStyle": "single",
      "semicolons": "always",
      "trailingCommas": "es5"
    }
  }
}

Git Hook Integration with Lefthook (Sub-Second Pre-Commit)

# lefthook.yml
pre-commit:
  parallel: true
  commands:
    biome-check:
      glob: "*.{js,ts,cjs,mjs,d.cts,d.mts,jsx,tsx,json,jsonc,css}"
      run: npx @biomejs/biome check --write --no-errors-on-unmatched --staged {staged_files}
      stage_fixed: true

Essential Biome CLI Commands

# Initialize Biome in current project
npx @biomejs/biome init

# Migrate automatically from ESLint and Prettier configs
npx @biomejs/biome migrate eslint --write
npx @biomejs/biome migrate prettier --write

# Run format + lint + import sorting in one pass
npx @biomejs/biome check --write ./src

# CI verification (exit code 1 on errors without modifying files)
npx @biomejs/biome ci ./src

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<a name="bahasa-indonesia"></a>

Bahasa Indonesia

Integrasi Orkestrasi

• Review Kode & Gerbang Kualitas: anti-slop, ai-code-review-autonomous, coderabbit, zero-tech-debt-auditor
• Pengujian & TDD: autonomous-tdd-debugger, e2e-testing-expert, property-mutation-testing-expert
• TypeScript & Kompiler: typescript-expert, spec-driven-development-expert
• Monorepo & Tooling CI/CD: monorepo-architect, ci-cd-devops-architect, github-actions-expert
• Siklus Hidup & Tata Kelola: brainstorming, zero-to-prod-orchestrator, session-memory-manager

Deskripsi

Panduan ahli untuk Biome v2, linter, formatter, dan pengatur impor terpadu berbasis Rust yang dirancang untuk menggantikan rantai perkakas ESLint + Prettier yang lambat. Mencakup konfigurasi satu file (biome.json), migrasi otomatis bebas kendala (biome migrate), integrasi Git pre-commit hooks via Lefthook/Husky, aturan linting ketat untuk React 19 dan TypeScript 5.8+, serta pengawasan kualitas di pipeline CI/CD.

Kondisi Pemicu

• Menyiapkan proyek baru yang membutuhkan proses linting dan pemformatan ultra-cepat (di bawah 1 detik).
• Migrasi dari kombinasi ESLint dan Prettier untuk mempercepat proses check hingga 10-100x lebih cepat.
• Mengonfigurasi hook pre-commit agar kode kotor tidak dapat di-commit ke repositori.
• Mengatasi konflik aturan antara formatter dan linter.

Perbandingan: Biome vs ESLint + Prettier

Aspek	Biome v2	ESLint + Prettier
Kecepatan	10-100x lebih cepat (Rust)	Lambat (Node.js engine)
Konfigurasi	1 file tunggal (biome.json)	3+ file (.eslintrc, .prettierrc, plugin)
Ketergantungan Paket	1 package @biomejs/biome	Belasan plugin & dependensi parser
Import Sorting	Terintegrasi native	Membutuhkan plugin tambahan

Integrasi CI/CD di GitHub Actions

# .github/workflows/quality.yml
name: Code Quality
on: [push, pull_request]

jobs:
  biome:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: biomejs/setup-biome@v2
        with:
          version: latest
      - name: Run Biome CI Gate
        run: biome ci .