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Migrate JS/TS linting from ESLint+Prettier to Biome. Use when .eslintrc* or eslint.config.* exists and no biome.json is present.
기본적으로 소스를 먼저 확인하는 Prompt가 선택됩니다. 직접 명령으로 전환하거나 로컬 사본을 다운로드할 수도 있습니다.
설치 여부를 결정하기 전에 SKILL.md와 SkillsMP에 표시된 보조 파일을 읽어 보세요.
Codex 또는 Claude로 설치 이 Prompt를 복사해 Codex, Claude 또는 다른 어시스턴트에 붙여 넣으면 Skill 페이지를 검토하고 설치를 진행할 수 있습니다.
직접 명령은 검토 Prompt를 거치지 않습니다. 실행하기 전에 소스를 확인하세요.
npx skills add https://github.com/laurigates/claude-plugins --skill eslint-to-biome명령은 한 줄로 유지됩니다. 복사하기 전에 가로로 스크롤해 전체 내용을 확인하세요.
로컬 사본을 원하시나요? SkillsMP에서 현재 제공할 수 있는 파일을 다운로드하세요.
SOC 직업 분류 기준
SKILL.md 표시 중
| name | eslint-to-biome |
| description | Migrate JS/TS linting from ESLint+Prettier to Biome. Use when .eslintrc* or eslint.config.* exists and no biome.json is present. |
| allowed-tools | Read, Write, Edit, Glob, Grep, Bash(find *), Bash(test *), Bash(npx *), Bash(bun *), AskUserQuestion, TodoWrite |
| model | sonnet |
| args | [--check-only] [--fix] |
| argument-hint | [--check-only] [--fix] |
| created | "2026-04-14T00:00:00.000Z" |
| modified | "2026-05-09T00:00:00.000Z" |
| reviewed |
| "2026-04-14T00:00:00.000Z" |
Migrate from ESLint (and optionally Prettier) to Biome — a fast, unified linter and formatter for JavaScript/TypeScript written in Rust. Migrates configuration, updates pre-commit hooks, and removes old dependencies.
| Use this skill when... | Keep ESLint when... |
|---|---|
biome.json does not exist yet | You rely on an ESLint plugin with no Biome equivalent (e.g., eslint-plugin-react-hooks, eslint-plugin-jsx-a11y) |
.eslintrc* or eslint.config.* exists | CI requires ESLint's exit codes specifically |
| You also want to replace Prettier with Biome formatter | Team has invested in custom ESLint rules |
| Using TypeScript and want a single tool |
Important: Biome covers ~90% of common ESLint rules but not all plugins. Audit
eslint-plugin-*dependencies before migrating. The most common unsupported plugins are accessibility (jsx-a11y) and framework hooks (react-hooks). You may need to keep ESLint alongside Biome for these.
find . -maxdepth 2 \( -name '.eslintrc' -o -name '.eslintrc.js' -o -name '.eslintrc.cjs' -o -name '.eslintrc.json' -o -name '.eslintrc.yaml' -o -name '.eslintrc.yml' -o -name 'eslint.config.js' -o -name 'eslint.config.mjs' -o -name 'eslint.config.ts' \)find . -maxdepth 2 \( -name '.prettierrc' -o -name '.prettierrc.js' -o -name '.prettierrc.json' -o -name 'prettier.config.js' \)find . -maxdepth 2 -name 'biome.json'find . -maxdepth 1 -name 'package.json'find . -maxdepth 1 -name '.pre-commit-config.yaml'| Parameter | Description |
|---|---|
--check-only | Report what would change without modifying files |
--fix | Apply migration automatically |
Execute this ESLint-to-Biome migration:
eslint* and prettier* dependencies.ESLint → Biome migration audit
================================
ESLint config: .eslintrc.json (N rules, plugins: [...])
Prettier config: .prettierrc (printWidth=N, singleQuote=true)
ESLint plugins: eslint-plugin-import, @typescript-eslint, ...
Biome support: ✓ eslint-plugin-import → Biome handles this
⚠ eslint-plugin-jsx-a11y → No Biome equivalent (keep ESLint for this)
biome.json: NOT PRESENT
--check-only, stop here.For each eslint-plugin-* found, determine Biome coverage:
| ESLint plugin | Biome equivalent |
|---|---|
@typescript-eslint | Biome has TypeScript-aware rules (nursery/use*, suspicious/, correctness/) |
eslint-plugin-import | Biome correctness/noUndeclaredDependencies, correctness/noUnusedImports |
eslint-plugin-unicorn | Biome has partial coverage via style/ rules |
eslint-plugin-jsx-a11y | Not covered by Biome — keep ESLint for accessibility |
eslint-plugin-react-hooks | Not covered by Biome — keep ESLint for hooks rules |
eslint-plugin-security | Partial coverage in Biome security/ rules |
If unsupported plugins are found, ask the user whether to proceed with a partial migration (keep ESLint only for those plugins). If the user declines, abort.
Generate biome.json preserving equivalent rules from the existing ESLint and Prettier configurations:
{
"$schema": "https://biomejs.dev/schemas/1.9.0/schema.json",
"organizeImports": {
"enabled": true
},
"linter": {
"enabled": true,
"rules": {
"recommended": true
}
},
"formatter": {
"enabled": true,
"indentStyle": "space",
"indentWidth": 2,
"lineWidth": 80
},
"javascript": {
"formatter": {
Adjust these defaults to match the Prettier config found in Step 1:
lineWidth → from printWidthquoteStyle → from singleQuote: true → "single"trailingCommas → from trailingComma: "es5" → "es5"semicolons → from semi: false → "asNeeded"indentStyle → from useTabs: true → "tab""devDependencies": {
remove: eslint, @typescript-eslint/parser, @typescript-eslint/eslint-plugin,
eslint-plugin-import, prettier, eslint-config-prettier, eslint-plugin-prettier
keep: eslint-plugin-jsx-a11y, eslint-plugin-react-hooks (if partial migration)
}
"@biomejs/biome": "^1.9.0"
{
"scripts": {
"lint": "biome check .",
"lint:fix": "biome check --write .",
"format": "biome format --write ."
}
}
Remove any ESLint/Prettier pre-commit hooks. Add Biome:
- repo: https://github.com/biomejs/pre-commit
rev: v0.6.0 # use latest
hooks:
- id: biome-check
additional_dependencies: ["@biomejs/biome@1.9.0"]
Remove ESLint and Prettier config files (unless keeping ESLint for unsupported plugins — in that case, keep .eslintrc but note Biome replaces most rules):
.eslintrc* → delete (if full migration)eslint.config.* → delete (if full migration).prettierrc* → delete.eslintignore → convert relevant patterns to biome.json ignore sectionRun Biome to confirm it works:
npx @biomejs/biome check .
# or with bun:
bunx @biomejs/biome check .
Address any errors that weren't caught by ESLint (Biome may surface additional issues). Errors on first run are expected — fix them or add to biome.json ignore rules.
Print a summary:
ESLint → Biome migration complete
===================================
biome.json CREATED
package.json UPDATED (added @biomejs/biome, removed eslint/prettier)
.eslintrc.json DELETED / KEPT (partial migration)
.prettierrc DELETED
.pre-commit-config.yaml UPDATED (added biome-check hook)
Partial migration note (if applicable):
Kept eslint-plugin-jsx-a11y and eslint-plugin-react-hooks — these plugins
have no Biome equivalent. ESLint is still needed for these rules.
Files to stage:
git add biome.json package.json .pre-commit-config.yaml
git add <deleted config files>
| Context | Command |
|---|---|
| Audit only | /migration-patterns:eslint-to-biome --check-only |
| Apply migration | /migration-patterns:eslint-to-biome --fix |
| Check with Biome | npx @biomejs/biome check . |
| Format with Biome | npx @biomejs/biome format --write . |
| Item | Value |
|---|---|
| Biome docs | https://biomejs.dev/ |
| ESLint migration guide | https://biomejs.dev/guides/migrate-eslint-prettier/ |
| Config schema | https://biomejs.dev/schemas/1.9.0/schema.json |
| Pre-commit hook | biomejs/pre-commit |
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